WO2006006659A1

WO2006006659A1 - Heating pack and method of using the same

Info

Publication number: WO2006006659A1
Application number: PCT/JP2005/013012
Authority: WO
Inventors: Toshihiro Dodo; Hisao Kimura; Michio Aida
Original assignee: Mycoal Products Corporation
Priority date: 2004-07-14
Filing date: 2005-07-14
Publication date: 2006-01-19
Also published as: JP2007275082A

Abstract

A heating pack that is flexible before, during and after use and on its one side is fitted to the garment of the wearer while on the other side brought into direct contact with the skin of the wearer to thereby alleviate the symptoms of menstrual cramps, etc. There is provided a heating pack comprising a substantially planar base material overlaid with an exothermic composition molding and further overlaid with a covering material, the exothermic composition molding at its periphery heat sealed, the heating pack having segmented heating parts constituted of the exothermic composition molding and having segmenting parts constituted of the heat seal, characterized in that the base material and the covering material are constituted of a thermoplastic resin film capable of heat sealing, and that the base material has none of pocket, accommodation section and accommodation area, and that the base material and/or the covering material is in advance furnished with air permeation means by perforation, and that multiple segmented heating parts are disposed via segmenting parts, and that the heating pack has a bending resistance of ≤ 100 mm in the longitudinal direction and has a bending resistance ratio of ≥ 50 in the shorthand direction orthogonal to the longitudinal direction.

Description

Specification

Fever pack and method of use

Technical field

[0001] The present invention has flexibility, comfortably transmits heat efficiently and stably to the body, has excellent adaptability to the user's body, and prevents symptoms such as menstrual pain. The present invention relates to a heat generating pack intended to relieve and a method of using the same.

Background art

[0002] Exothermic compositions utilizing oxidation reactions of metals such as iron have been provided as powders or granules, viscous bodies and cream bodies. The heat-generating packs using them are very excellent in view of cost, safety, heat-generating temperature, etc. For example, they are already put into practical use as so-called chemical warmers filled in bags having air permeability!

[0003] In order to facilitate the mounting of the heat-generating bag, Patent Document 1 discloses that one side of a flat heat-generating bag has air permeability, and the entire surface of the other side is not flat or appropriately patterned. There has been proposed a heat-generating bag having a structure in which a sticky adhesive layer (same meaning as an adhesive part) is provided and a surface having this adhesive layer is attached from the underwear.

Patent Document 2 also proposes a heat generating bag in which a pressure-sensitive adhesive layer is partially provided on the air permeable surface in order to limit the air flow rate of the air permeable packaging material and increase the heat generation duration.

In addition, Patent Document 3 discloses a heat generating bag in which an adhesive tape is attached to the peripheral portion of the heat generating bag in a belt shape, or Patent Document 4 discloses a heat generating bag in which a double-sided adhesive tape is applied. Is also proposed! It is suggested that the adhesive surface of these fever bags is applied from the outside of the underwear toward the body. These exothermic bags are widely used as sticking type exothermic bags (hereinafter referred to as sticking type).

In Patent Document 5, an adhesive portion is provided on the ventilation surface of a flat heat generating bag containing a heat generating composition or sheet-shaped heat generating pack that generates heat upon contact with oxygen in the air. A heating bag is disclosed in which a surface is attached to the inside of an undergarment and fixed to the undergarment, and a non-adhesive surface is brought into contact with the skin to directly warm the human body.

In addition, it improves heat transfer from the heating bag to the body in the type heating bag As a heat-generating bag that is lighter and thinner, we also developed a heat-generating bag that has air permeability on one side of a flat bag, an adhesive part on the other side, and the adhesive part surface is directly attached to the skin. It has been.

It has also been proposed that the area of the pressure-sensitive adhesive layer be 30 to 70% for the purpose of preventing the occurrence of itching and rash on the skin when directly applied to the skin (Patent Document 6). In addition, heat-generating bags have been developed in which a moisture-containing gel layer is applied to the skin instead of the adhesive part. These fever bags are referred to as direct-fitting type fever bags (hereinafter referred to as direct-fitting type) because the deviations are directly attached to the skin.

These type of fever bags and direct-fitting type fever bags are intended to warm against cold, etc., as well as prevent over-cooling due to cooling in summer, relieving menstrual pain, neuralgia, muscle pain, etc. It is also used as a medical device for the purpose of fatigue recovery.

On the other hand, in order to obtain a more comfortable feeling of use, in order to prevent the exothermic composition from slipping off and fit by various shapes, thickeners and binders are used to maintain shape maintainability and heat generation characteristics. Various exothermic compositions have been proposed. For example, Patent Document 7 discloses a method for producing a heat-generating composition granulated to have an average particle size of 0.5 mm or more, and granulation by adding 10 to 20 parts by weight of an adhesive binder component to added water. A method for producing an exothermic composition with improved post-particle strength has been proposed.

Further, Patent Document 8 proposes the use of a heat-generating composition that has a shape maintaining property by adding a powdery thickening agent such as corn starch or potato starch, and a throw-away body warmer. Patent Document 9 proposes a solid exothermic composition in which a powdery or granular exothermic composition is mixed with a binder such as CMC and compression molded.

Patent Document 10 proposes a heat-generating pack that uses a cross-linking agent and a water-absorbing polymer and is pressure-integrated by pressure. Patent Document 11 proposes an ink-like or cream-like exothermic composition and exothermic pack using a thickener, and a method for producing the same.

Patent Document 12 proposes that the surface of a heat-generating composition molded body using a binder is covered with a breathable film such as CMC to maintain the shape.

In Patent Document 13 and Patent Document 14, the exothermic composition is made into a viscous body or cream, It has been proposed to change the shape from a conventional rectangle to a foot shape or an elliptical shape so that it can be adapted to the contour of the body to be heated.

Further, there is disclosed a heat generating pack having a flexible structure in which a heat generating portion in which a heat generating composition is sealed between packaging materials having air permeability on at least one surface is composed of a plurality of small heat generating portions partitioned by a seal portion. Yes. Patent Document 15 and Patent Document 16 disclose a heat generating pack having a heat generating portion force in which a powdered heat generating composition is filled in a divided section and divided into a plurality of sections by a seal portion.

Patent Document 17, Patent Document 18, Patent Document 19, Patent Document 20, Patent Document 21, and Patent Document 22 describe a base material having a heat generating composition using a flocculant or a dry binder and a storage pocket. An exothermic pack in which the exothermic part of the exothermic composition is divided into a plurality of sections has been proposed.

[0004] However, these sticking type and direct sticking type heat generating bags have the following problems. That is, the heat-generating bag of the type that is attached to the outside of the underwear has a disadvantage that heat is not efficiently transferred to the body because the upper force of the underwear is also attached. Also, from this, the desired warmth

In order to obtain the desired duration, a large amount of the heat generating composition is required. As a result, the heat generating bag becomes heavy and bulky. It was easy to see from there.

[0005] Among the heat-generating bags to be attached, in the case of a heat-generating bag with an adhesive layer partly provided on the air-permeable surface, the air-permeability depends on the degree of adhesion between the body and the heat-generating bag due to changes in posture during wearing. Because of the change in temperature, there was a drawback that it was not possible to obtain a constant warmth, such as being too slim or too hot. In addition, a heat-generating bag with adhesive tape attached or a heat-generating bag with double-sided adhesive tape attached has a complicated manufacturing process, is complicated when used, and lacks adhesive strength. As a result, the situation is disappearing.

[0006] In addition, the flat heating bag of the type that is attached to the inside of the underwear is held by the underwear of the heating bag, so that the strength of the mounting part does not fall off, but there is only one heating part, making it flexible. There was a chipping, a feeling of being stiff during use, and a feeling of use being bad. Especially when the size of the flat heating bag was increased, it became a problem and became a problem.

[0007] On the other hand, the direct-fitting type heat-generating bag is directly attached to the skin surface, so that the heat generation characteristics are changed. This may be immediately transmitted to the skin surface of the wearing part and may cause burns, and it is necessary to set the heat generation characteristics lower than the desired heat generation characteristics to avoid burns. there were.

[0008] Furthermore, when the fever bag is pasted, it feels cold, when it is peeled off, it feels painful, and it may cause itching or rash on the skin part to be attached! In addition, when sweating during use, the adhesive part is peeled off by sweat, so that the heat generating pack falls off, and the sweat causes discomfort.

[0009] Further, even when the area of the adhesive part on the surface to be applied to the skin was reduced, it was difficult to prevent itching and rash on the applied skin part. On the other hand, when the water gel layer was used instead of the adhesive part, the coldness during use could not be eliminated. In addition, since the fever bag is directly affixed to the skin, there is a disadvantage that it causes a sense of incongruity such as a feeling of pulling due to the fact that the expansion and contraction of the skin is hindered.

[0010] Even when the heat generating portion is divided into a plurality of compartments, the heat generating composition in which the heat generating composition is hardened with an agglomeration aid or the like has a problem of poor heat generation performance.

[0011] Conventionally, exothermic packs are manufactured by a filling method, or an exothermic composition containing a flocculant or a binder is filled into a packaging material having a storage compartment in which agglomerates and compression bodies are formed under reduced pressure. It had been. In addition, a filling pocket is prepared in advance on a base material, the heat generating composition is filled in the pocket, a packaging material is placed on the pocket, and the pocket is sealed.

[0012] When a heat-generating pack having a segmented heat generating portion is produced using a powder-like heat-generating composition or a granular heat-generating composition as a heat-generating composition, In addition, the granular heat generating composition is stored in a partially sealed bag-shaped storage body and sealed as a whole. That is, it is practically impossible mechanically to produce a heat-generating pack having a plurality of small-sized divided regions by filling the powder-like heat-generating composition or granular heat-generating composition while partially sealing. In addition, the exothermic composition was mixed in the seal portion, causing problems due to insufficient sealing. In particular, it was practically impossible to continuously produce products with partial shapes of 20 mm or less and small shapes of 20 mm or less. Further, in the method using the rotating magnet method disclosed in Patent Document 23, a complicated operation must be performed and the structure is also complicated. Therefore, fever The operation during layer formation is troublesome, the equipment used is complicated and expensive, it is prone to failure, requires troublesome maintenance, and is inconvenient to handle, and further limits the downsizing of the heat generating part. was there.

In addition, in the method using the pocket method, a exothermic composition containing a flocculant and a binder is used, and a dry powder mixture of the exothermic component containing the flocculant and the binder is left as it is or compressed into granules, pellets, tablets, or slugs. The shaped exothermic composition is filled in a concave pocket formed in the packaging material in advance and compressed to create a heat generating portion. By the way, in the heat generation pack having a plurality of heat generation sections, the heat generation time is significantly reduced compared to the heat generation pack in which the flocculant and the binder are not mixed, and in particular, the heat generation pack has a narrow area where the shortest length is 15 mm or less. If the heat generating part or a small-sized segmented heat generating part is used, the heat generation duration is remarkably shortened, which causes a practical problem. In order to increase the heat generation duration, it was necessary to increase the size of one sectioned heating section, resulting in a heating pack having a large section heating section. Moreover, even if a powdery or granular exothermic composition is used, a concave bucket must be provided in advance on the packaging material, which is complicated. In addition, after enclosing the exothermic composition in the pocket and wrapping material, it is necessary to add moisture to the exothermic composition in the pocket and make it a exothermic yarn and composition that can generate heat by contact with air. Processes had to be provided, making the process complicated and costly.

[0013] The single-packed form having one heat generating portion as described above has a problem that it is difficult to hold the adhesive, for example, and it easily falls off or a strong sense of discomfort occurs. Such a problem is further promoted by a decrease in flexibility due to the lump as the reaction of the exothermic knock proceeds. Another problem is that the stretched film forming the storage bag shrinks and curls due to heat generation and the end of the single bag is rolled up, and the hook holding it easily peels off and drops.

[0014] Patent Document 1: Japanese Utility Model Publication No. 56-34735

Patent Document 2: Japanese Utility Model Publication No. 3-96816

Patent Document 3: Japanese Utility Model Publication No. 62-119914

Patent Document 4: Utility Model Registration No. 1686986

Patent Document 5: JP 2001-198150 A

Patent Document 6: JP-A-9 557 Patent Document 7: Japanese Patent Laid-Open No. 4-293989

Patent Document 8: JP-A-6-343658

Patent Document 9: Japanese Unexamined Patent Publication No. 59-189183

Patent Document 10: International Publication No. 00Z13626 Pamphlet

Patent Document 11: JP-A-9 75388

Patent Document 12: JP-A-60-101448

Patent Document 13: JP-A-9 276317

Patent Document 14: Japanese Patent Laid-Open No. 11 299817

Patent Document 15: Japanese Utility Model Publication No. 1 110718

Patent Document 16: Japanese Utility Model Publication No. 6-26829

Patent Document 17: Japanese Unexamined Patent Publication No. 2000-288008

Patent Document 18: Japanese Patent Publication No. 11-507593

Patent Document 19: Japanese Patent Publication No. 11-508314

Patent Document 20: Japanese Patent Publication No. 11 508786

Patent Document 21: Japanese Patent Publication No. 11-512954

Patent Document 22: Special Table 2002-514104

Patent Document 23: JP-A-7-124193

Disclosure of the invention

Problems to be solved by the invention

[0015] From the above, the present invention is flexible in that the heat generating pack is flexible before, during and after use, and easy to attach the heat generating pack, and is attached to the user's clothes on one side and on the other side. It is directly applied to the user's skin, and the heat from the heat pack is efficiently and stably transmitted to the body, and it has excellent adaptability to the user's body, such as menstrual pain. It is to provide a fever pack intended to relieve symptoms and a method of using the same. Means for solving the problem

[0016] The exothermic pack of the present invention, as described in claim 1, is a substantially flat substrate made of a exothermic composition molded body obtained by molding a formable exothermic composition that generates heat upon contact with oxygen in the air. The heat generating composition molded body is heat-sealed, and the heat generating composition is covered with a covering material. A heat generating pack having a divided heat generating portion constituted by a composition molded body and a divided portion constituted by the heat seal,

1) The base material and the covering material are composed of a heat-sealable thermoplastic resin film cover,

2) The substrate does not have pockets, storage compartments or storage areas,

3) The base material and Z or the covering material are previously provided with air permeability means by perforation,

4) A plurality of the divided heat generating portions are provided via the divided portions,

5) The moldable exothermic composition contains iron powder, a carbon component, a reaction accelerator and water as essential components, and has a mobile water value of 0.01 to 20, and includes an aggregating aid, an aggregating agent, and a collecting agent. Lump adjuvant, dry binder 1, dry binder, dry binder, adhesive material, thickener and excipients,

6) The heating pack has a bending resistance in the longitudinal direction of 1 OO mm or less, and a bending resistance ratio in the short direction of the direction is 50 or more.

The heat generating pack according to claim 2 is characterized in that, in the heat generating pack according to claim 1, the bending resistance of the base material and the covering material is 200 mm or less.

Further, the heat generating pack according to claim 3 is the heat generating pack according to claim 1, wherein the heat generating portion has a plurality of divided heat generating portions provided via the dividing portions, and the center point is a quadrilateral. At least one of the four adjacent section heat generating parts constituting the section passes through the center line of the minimum width of the section existing between the other three section heat generating sections, and is a line orthogonal to the center line Each segment heat generating part is sufficiently close to each other so that at least one end of at least one of the wires of the line is cut off, and the width of at least one section between the four adjacent heat generating parts Is less than 37.5% of the minimum diameter of four adjacent heating sections.

Further, the heat generating pack according to claim 4 is the heat generating pack according to claim 1, wherein the heat generating portion has a plurality of divided heat generating portions provided via the dividing portions, and the center point is a triangular shape. At least one of the three adjacent section heating portions constituting the section passes through the center line of the minimum width of the section existing between the other two section heat generation sections, and passes through one end of a straight line perpendicular to the center line. So as to block, the three existing adjacent heat generating parts between the divided heating parts The minimum width of the segmented portion is 15% or less of the measured value of the minimum diameter of the segmented heat generating portion constituting the triangle.

The exothermic pack according to claim 5 is the exothermic pack according to claim 1, wherein the moldable exothermic composition comprises a water retention agent, a water-absorbing polymer, a pH adjuster, a hydrogen generation inhibitor, an aggregate, Fibrous substances, functional substances, surfactants, organosilicon compounds, pyroelectric substances, moisturizers, fertilizer components, hydrophobic polymer compounds, heat generation aids, metals other than iron, metal oxides other than iron oxide, It is characterized by containing at least one selected from an additional component consisting of an acidic substance or a mixture thereof.

Further, the heat generating pack according to claim 6 is provided with a first outer packaging material on the covering material side of the heat generating pack according to claim 1, and a second outer packaging material on the base material side, and the heat generation pack. The pack includes first and second surfaces, the first surface and the second surface are rugged, and the heat generating pack includes means made of an adhesive layer as a fixing means, and the means includes the first surface and the second surface. (1) Located on the first surface made of the outer packaging material, the first surface has oxygen permeation means, the bending resistance in the longitudinal direction is 100 mm or less, and the bending resistance in the short direction perpendicular to it. It is characterized by a frequency of 50 or more.

A method of using the heat generating pack according to the present invention is a method of using the heat generating pack according to claim 1 between clothing and skin as described in claim 7, wherein the heat generating pack is provided on the ventilation surface of the heat generating pack. Affix the heat-generating pack to the inside of the clothing through the adhesive layer provided, and keep the other side in contact with the skin and maintain the skin temperature between 32 ° C and 50 ° C for a period of 20 seconds to 24 hours. It is characterized by.

In the heat-generating pack, the thermoplastic resin of the heat-sealable thermoplastic resin film is polyethylene, polypropylene, nylon, polyester, polyvinyl chloride, polyvinylidene chloride, polyurethane, polystyrene, and hatching. It is preferable that at least one selected material strength is selected from the ethylene acetate butyl copolymer, ethylene acetate butyl copolymer and mixtures thereof, and their laminate strength.

Further, in the heat generating pack, the heat-sealable thermoplastic resin film includes a first side surface made of thermoplastic resin, an acidified ethylene acetate butyl copolymer, and an ethylene acetate butyl copolymer. By shared extrusion having a second side comprising Preferred to be a laminate.

In the exothermic pack, the laminate is a coextruded laminate of a polypropylene material and an ethylene vinyl acetate copolymer material, and the polypropylene is from 10% of the total thickness of the laminate. It is preferably 90%.

In the heat generating pack, it is preferable that the polypropylene strength is 40% to 60% of the total thickness of the laminate! /.

In the exothermic pack, the moldable exothermic composition comprises 30% to 80% by weight of iron powder, 3% to 25% by weight of carbon material, and 0.5% to 10% by weight. It is preferable to provide a reaction accelerator and 1% to 40% water by weight.

Further, in the heat generating pack, when the exothermic yarn and the molded article are sealed in the section heat generating section, the ratio of the section heat generating section volume to the volume of the heat generating composition formed body is from 0.7. 1.0 is preferable.

In the exothermic pack, it is preferable that the exothermic composition molded body is compressed and has a density larger than 0.85 g Zcm ³ .

Further, in the method of using the heat generating pack, it is preferable to maintain it at 32 ° C to 39 ° C.

The invention's effect

According to the present invention,

1) Using a substantially flat base material, a moldable exothermic composition, and a mold forming method, which is not preliminarily provided with a storage portion intended for storing heat-generating yarns and articles such as pockets. The exothermic composition molded body which is a molded body of the moldable exothermic composition is laminated on the base material, and the covering material is further covered, and the peripheral portion of the exothermic composition molded body is heat-sealed. As a result of manufacturing the uneven heat generating pack, the heat generating pack can be manufactured at low cost.

2) Since the uneven heat-generating pack using the heat-generating pack of the present invention has a divided heat generating portion composed of a plurality of divided heat generating portions through the dividing portion, it has flexibility and structure maintenance and is well along the body. Therefore, stable heat generation characteristics can be maintained regardless of changes in body posture during use.

3) Fix the heat pack inside the garment and generate heat by the heat pack that touches the other side of the body. It is possible to warm the human body by directly contacting the skin without sticking the knock on the skin, and the coldness and pasting immediately after attaching the heat generation pack, which was a defect of the conventional direct attachment heat generation pack All the problems such as itching and rash on the affected area, pain when peeling the heat-generating pack, and dropping of the heat-generating bag when sweating, causing discomfort due to sweat being not absorbed, were all eliminated.

4) Since the heat of the heat generation pack can be efficiently transmitted to the skin, the heat generation pack can be made light and thin, and the desired duration can be obtained without feeling uncomfortable when worn. For this reason, in addition to large-sized fever packs that were difficult with flat fever packs and fever packs that take warmth to overcome the cold, prevention of poor physical condition due to summer cooling, relieving menstrual pain, neuralgia, muscle pain, etc. In addition, it has become possible to obtain excellent effects as a medical device for the purpose of recovery from fatigue.

BEST MODE FOR CARRYING OUT THE INVENTION

The heat generating pack of the present invention comprises a heat generating composition molded body formed of a moldable heat generating composition that generates heat upon contact with oxygen in the air, and is laminated on a substantially planar base material. And a heat generating pack having a heat generating portion formed by heat-sealing a peripheral portion of the heat-generating composition molded body and a section heat-generating portion formed by the heat-generating composition formed body and a section formed by the heat-sealing.

2) The substrate does not have pockets, storage compartments or storage areas,

6) The exothermic pack has a bending resistance in the longitudinal direction of 1 OO mm or less and a bending resistance ratio in the short direction of the direction of 50 or more. [0019] Also,

(1) The heat generating section has a plurality of section heat generating sections provided via a section section, and at least one force of the four adjacent section heat generating sections whose center point constitutes a quadrilateral and the other three Each of the divided heat generating parts is cut off at least one end of at least one of the lines passing through the center line of the minimum width of the divided part existing between the divided heat generating parts and orthogonal to the central line. Are sufficiently close to each other, and the width of at least one section between the four adjacent heat generating parts is less than 37.5% of the minimum diameter of the four adjacent heat generating parts. Temperature characteristics can be obtained.

(2) The heating unit has a plurality of segmented heating units provided via the segmenting unit, and at least one of the three adjacent segmented heating units whose center points form a triangle is the other two. The section existing between the three adjacent section heat generating sections so as to block one end of a straight line passing through the center line of the minimum width of the section section existing between the two section heat generating sections and orthogonal to the center line. By setting the minimum width of the section to 15% or less of the measured value of the minimum diameter of the segmented heating section constituting the triangle, excellent temperature zone characteristics can be obtained.

That is, by disposing the segment heat generating part as in the above (1) and (2), heat sealing of the segment heat generating part is facilitated,

1) The temperature range of the heat generation pack can be changed gently without causing a large temperature difference, and the rate of temperature change between the divided heat generations can be minimized.

2) Due to the mutual heat retention effect between the heat generating sections of each section, the temperature difference between the maximum temperature range and the minimum temperature range of the heat generation area of the heat generation wrap is reduced, and the temperature range is reduced by reducing the overall temperature range. The band can be made uniform.

3) End force in the long axis direction of the heat generating wrap A temperature range in which the temperature rises gently is obtained by applying force toward the center, enabling comfortable warming.

[0020] Next, the heat generating pack of the present invention will be described.

The heat generating pack has a plurality of individual section heat generating parts fixed to the base material. These divided heat generating portions are arranged at a distance from each other, and each of the divided heat generating portions operates independently of the remaining divided heat generating portions. Each section heating part is manufactured by heat-sealing the base material and the covering material at the peripheral part of the exothermic composition molded body or its compressed body. As a result, the gap is reduced to prevent the exothermic composition molded body or the compressed body from moving in the section heat generating portion. In addition, the segment heat generating part can be prevented from being shrunk easily.

Therefore, it is more easily adapted to the user's body than providing a small number of large heat generating parts.

[0021] The base material is a heat-sealable thermoplastic resin film, and is made of a flexible thermoplastic resin material.

In addition, packaging materials that have been used in the past can be used for disposable warmers and heat-generating packs that use iron powder and heat-generating compositions that generate heat upon contact with oxygen in the air. The exothermic composition molded body or the segmented heat generating part containing the compressed body exists in the meantime when the bending resistance is high, and the segmented part which is a heat seal part not containing the exothermic composition molded body or the compressed body is rigidly soft. The degree is low. The heat generating part having the dividing heat and the heat generating part can maintain a difference in bending resistance between about 0 ° C and about 80 ° C. Therefore, the dividing part functions as a hinge and is more than the heat generating part. Turn preferentially. The heat generating pack consisting of a section heating section and a section section has a section functioning as a hinge from room temperature to warming (about 20 ° C to about 60 ° C), and bends more preferentially than the section heating section. The good bending resistance difference is still maintained during heating. As a result, the exothermic pack has sufficient rigidity to maintain the structural support of the segmented exothermic part and prevent unacceptable stretching of the continuous layer structure during processing or use, while being excellent when heated. The bending resistance is still maintained.

[0022] The longitudinal softness of the heat generating pack is 100 mm or less, preferably 60 mm or less, more preferably 50 mm, still more preferably 30 mm or less, and still more preferably 20 mm or less. The bending resistance ratio is 2 or more. This bending resistance and bending resistance ratio is maintained at least between 20 ° C and 60 ° C.

[0023] The bending resistance of the base material and the covering material is 100 mm or less, preferably 60 mm or less, more preferably 50 mm or less. The bending resistance of the substrate and the covering material is maintained at least between 20 ° C and 60 ° C. For the base material and the coating material, the bending resistance of the coating material can be adjusted by the type, thickness, degree of stretching, and the like. In addition, at least a part of the base material and the covering material is air permeable.

The material constituting the base material and the covering material is not limited as long as it functions as a storage bag for the exothermic composition. The materials normally used for chemical warmers and heat packs can be used. For example, non-breathable material, breathable material, water-absorbing material, non-water-absorbing material, non-stretchable material, stretchable material, stretchable material, non-stretchable material, foamed material, non-foamed material, non-heat seal Examples of such materials include heat-resistant materials, heat-sealable materials, etc., and can be used as appropriate according to the desired application in the desired form of films, sheets, non-woven fabrics, woven fabrics, etc. and their composites. The covering material may be a force that also acts as a breathable film, sheet, or non-woven fabric, or vice versa. Further, the flooring material may be properly used for air permeability and non-air permeability.

The packaging material of the storage bag may be a single layer structure or a multilayer structure, and there is no limitation on the structure. The packaging material is at least a base material and a covering material, but the packaging material on which the exothermic composition molded body is laminated is the base material, and the packaging material covered on the exothermic composition molded body is the covering material, and the ventilation It doesn't matter if there is sex. As an example, if the example of a multilayer structure is described using a non-breathable packaging material as a base material and a breathable packaging material as a coating material, the base material will be A layer ZB layer or A layer ZB layer ZC layer or A layer. Examples include ZB layer, ZC layer, ZD layer force, and coating material layer, ZG layer or E layer, ZF layer, ZG layer, or F layer, ZH layer, and ZG layer force. Layer A is a thermoplastic resin film such as polyethylene, heat seal layer such as polyethylene and EVA, and water-absorbing paper. Layer B is a nonwoven fabric of thermoplastic resin such as nylon, non-water-absorbing paper, and water-absorbing paper. Paper, polyethylene film, polypropylene film, polyester film, thermoplastic resin film such as polyamide (nylon, etc.) film, core material such as non-water absorbent paper and water absorbent paper, etc. Water-absorbing paper, water-absorbing paper, thermoplastic resin film such as polyethylene, non-slip layer, non-woven fabric of thermoplastic resin such as polyester and nylon, etc. D layer is separator, thermoplastic resin film such as polyethylene, non-woven fabric E layer is a heat seal layer, etc. F layer is a thermoplastic resin porous film or perforated film such as polyethylene, polyethylene or other thermoplastic resin film, non-water absorbent paper , Absorbent paper, etc., G layer nonwoven thermoplastic 榭脂 such as polyester and nylon, H layer non-water-absorbing sheet such a water-absorbent paper, and the like. For example, Examples of base materials or coating materials include polyethylene heat seal layers / polypropylene films, polyethylene heat seal layers / polypropylene films, E

VA heat seal layer Z polypropylene film, EVA heat seal layer Z polypropylene film Z adhesive layer Z separator, EVA heat seal layer Z polyethylene film Z nylon nonwoven fabric, non-woven fabric / porous film, polyethylene using meta-mouth catalyst Heat seal layer Z polyethylene film Z nylon non-woven fabric, polyethylene heat seal layer using a metal mouth catalyst Z polypropylene film Z polypropylene non-woven fabric, non-woven fabric Z (paper and Z or perforated (needle, laser) film) Z porous film, Non-woven fabric Z (paper and Z or porous film) Z perforated (needle, laser) film, non-woven fabric Z (paper and Z or porous film) z non-woven fabric, etc. are examples. There is no limitation on the method of laminating each layer. Each layer may be laminated directly by hot-melt extrusion or the like, which may be laminated via a breathable pressure-sensitive adhesive layer or a laminating agent layer. In the present invention, polyethylene produced using a metallocene catalyst is also included in polyethylene.

For example, when the material such as a nonwoven fabric or a porous film is laminated via a breathable adhesive layer, the breathable adhesive layer is formed by a curtain spray method in which the adhesive substance is sprayed and unfolded through hot air while being heated and melted. And an adhesive material in a porous state by fiberizing an adhesive substance by an appropriate method such as a melt blow method or a slot spray method, and spreading and depositing on an appropriate support substrate made of a porous film, a breathable substrate or a separator. An example is the method of doing this.

The thickness of the base material, the covering material, the laying material, and the material composing them is not greatly limited depending on the application. Usually, it is 5 to 5000 111, preferably 10 to 500 / ζ πι, more preferably 20 to 250 μm.

The non-breathable material is not limited as long as it has non-breathability. Polyethylene, polypropylene, nylon, acrylic, polyester, polyvinyl alcohol, ethylene monoacetate copolymer, and other films, sheets, and coatings that have polymer strength, and metal (including semiconductor) compounds such as silicon oxide are laminated on them. Examples of these materials and composite materials using them are examples.

For example, among the non-breathable materials, as a non-breathable film, non-breathable One example is a material film in which a thin film of a metal or a compound containing a semiconductor is provided in a single layer or multiple layers. For example, examples of the metal containing a semiconductor include silicon, aluminum and the like, alloys and mixtures containing these metals. Examples of the metal compound including a semiconductor include oxides, nitrides, and oxynitrides of the above metals, alloys, and mixtures. For example, a layer of polyester oxide film, an aluminum oxide layer, a silicon oxynitride layer, or an arbitrary layer of these layers laminated on a polyester film, and a stretched polyolefin film (for example, biaxially stretched polypropylene film). This is an example.

The breathable material is not limited as long as it has breathability. For example, a breathable film such as a porous film and a perforated film, paper, non-woven fabric, etc. having air permeability alone, paper, and a breathable film, non-woven fabric, etc. are laminated to have air permeability. , A non-breathable packaging material in which a polyethylene film is laminated to a non-woven fabric, with a fine hole using a needle or the like to make it breathable, or fibers are laminated and thermocompression bonded for breathability Examples include a controlled nonwoven fabric, a porous film, or a laminate of a nonwoven fabric and a porous film. Here, the perforated film is a non-breathable film such as a polyethylene film provided with fine holes with a needle so as to be breathable.

The breathability is not limited as long as heat generation can be maintained. When used for normal heat generation, breathability is moisture permeability by the Lissy method (Lyssy method), usually 50 ~: LO, 000g / mV24hr, preferably 70 ~ 5, OOOgZm so 24hr, and more preferably 100~2, OOOg Zm ² Z24hr, more preferably from 100~700gZm ² Z24hr.

If the moisture permeability is less than 50, the amount of heat generated is small and a sufficient heating effect cannot be obtained, which is not preferable. On the other hand, if it exceeds 10,000 gZm ² Z24hr, the heat generation temperature becomes high, causing a safety problem. Since fear arises, it is not preferable. However, depending on the application, it is not limited to use in excess of 100000 gZm ² Z24hr, or in some cases with moisture permeability close to an open system.

The stretchable packaging material is not particularly limited as long as it has stretchability. That is, as a whole, a single product that has elasticity is not necessary. Even composite products in combination with stretchable substrates.

For example, natural rubber, recycled rubber, synthetic rubber, elastomers, stretchable shape memory polymers, etc., or mixtures thereof, blends of these with non-stretch materials, mixed products, and combinations of these. Examples include woven fabrics, films, yarns, strands, ribbons, tapes, scrim-structured films.

The porous film is not limited, but it can also be a filler material such as polyethylene, polyolefins such as linear low density polyethylene and polypropylene, fluorine resins such as polytetrafluoroethylene, and the like. A porous film obtained by stretching a film can be selected as appropriate.

The non-woven fabric is not limited, but may be a single fiber or a composite fiber having material strength such as rayon, nylon (polyamide), polyester, acrylic, polypropylene, vinylon, polyethylene, polyurethane, cupra, cotton, cell mouth, norp. A single non-woven fabric or a mixture of these fibers or a stack of cumulative fiber layers is used. In addition, dry non-woven fabric, wet non-woven fabric, spunbond, spunlace, etc. can be used in the manufacturing process. A nonwoven fabric made of a composite fiber having a core-sheath structure may also be used. The non-woven fabric that contacts the skin is preferably a brushed non-woven fabric. Moreover, a stretchable nonwoven fabric and a non-stretchable nonwoven fabric can also be used.

The water-absorbing material is not particularly limited as long as it has a water-absorbing film-like shape and a sheet-like shape.

The water-absorbing material is not particularly limited as long as the material itself has water-absorbing property, regardless of whether the material itself has water-absorbing force.

Specifically, for example, a foam film having a water absorption sheet (foamed body such as a water absorbent foam polyurethane) or papers, a nonwoven fabric or a woven fabric formed of fibers having a water absorption property, or a water absorption property. In addition to water-absorbing materials such as non-woven fabrics and woven fabrics containing fibers or water-absorbing porous films and sheets, foamed films and sheets, non-woven fabrics, woven fabrics or porous films, regardless of whether or not they absorb water, Containing, impregnating, kneading, transferring or supporting an agent to impart or increase water absorption, or with or without water absorption, foamed film 'sheet, paper, nonwoven fabric, woven fabric or porous film' sheet Water-absorbing foam film cut into a planar shape of the present invention 'sheet, paper, nonwoven fabric, woven fabric or porous film' water-absorbing sheet, etc. Examples thereof include those obtained by applying a water-soluble material to one or both surfaces of the present invention to impart water absorption.

In particular, in the heat generating pack of the present invention, the surface that comes into contact with the skin is a comfortable surface such as water absorbency against sweat, so that when sweating, the surface that comes into contact with the skin is absorbed. It is preferable that the packaging material is composed of a packaging material using a nonwoven fabric or a woven fabric mainly composed of water-absorbing fibers having a water retention rate of 20% or more. Examples of water-absorbing fibers with a water retention rate of 20% or more include cotton, silk, hemp, wool, polyacrylonitrile synthetic fibers, polyamide synthetic fibers, polybutyl alcohol synthetic fibers, acetate fibers, triacetate fibers, recycled fibers, etc. can do. Furthermore, as a nonwoven fabric excellent in water absorption, a nonwoven fabric in which a highly water-absorbing polymer is held on a nonwoven fabric can be used. In addition, the nonwoven fabric or woven fabric which has these fibers as a main component is also a thing with a comparatively favorable touch with respect to skin.

Furthermore, a highly water-absorbing packaging material with high sweat absorbability can also be used as the packaging material. For example, a non-woven fabric containing a fiber whose surface is coated with a highly water-absorbent resin, a non-woven fabric containing a hollow fiber having a large number of micropores on its surface, a sac or a multi-layered cross-sectional shape, etc. For example, a non-woven fabric containing a fiber having a capillary action is used. In addition, a nonwoven fabric or a film in which a water-absorbing inorganic compound is held can be used for the non-adhesive surface packaging material. For example, a nonwoven fabric in which a powder of diatomaceous earth, zeolite, silica gel or the like is held in a nonwoven fabric, a film in which a relatively large amount of powder of silica, alumina or the like is held in a synthetic resin such as polyethylene can be used.

[0025] The exothermic composition contains iron powder, a carbon component, a reaction accelerator, and water as essential components, and includes an agglomeration aid, a dry binder, an aggregating agent, an adhesive binder, a thickener, and an excipient. Does not contain an agent, has excess water with a mobile water value of 0.01-20, has moldability with the excess water, and moisture in the exothermic composition does not function as a barrier layer, Any exothermic composition that causes an exothermic reaction upon contact should not be restricted.

In the present invention, when the exothermic reaction is caused by contact with air without functioning as the noria layer, the moisture in the exothermic composition does not function as the noria layer as the air blocking layer, and the exothermic composition. Immediately after production, contact with air to cause an exothermic reaction immediately.

[0027] Further, if desired, the exothermic composition may comprise a water retention agent, a water-absorbing polymer, a pH adjuster, hydrogen Generation inhibitor, aggregate, fibrous material, functional substance, surfactant, organic silicon compound, pyroelectric substance, moisturizer, fertilizer component, hydrophobic polymer compound, heat generation aid, metal other than iron, oxidation You may choose at least 1 sort (s) chosen from the additional components which consist of metal oxides other than iron, an acidic substance, or these mixtures.

[0028] The mixing ratio of the exothermic composition of the present invention is not particularly limited, but is 1.0 to 50 parts by weight of a reaction accelerator with respect to 100 parts by weight of iron powder, Is 1.0 to 60 parts by weight, carbon component 1.0 to 50 parts by weight, water retention agent 0.01 to: LO part by weight, water-absorbing polymer 0.01 to 20 parts by weight, pH adjuster 0.01 to It is preferable to select the blending ratio so that 5 parts by weight, hydrogen generation inhibitor 0.01 to 12 parts by weight, and the exothermic composition has a mobile water value of 0.01 to 20.

Furthermore, you may add the following to the said exothermic composition with the following mixture ratio with respect to iron powder. That is, 1.0-50 parts by weight of metal other than iron, 1.0-50 parts by weight of metal oxide other than iron oxide, 0.01-5 parts by weight of surfactant, hydrophobic polymer compound, aggregate, Fibrous substances, functional substances, organic silicon compounds and pyroelectric substances are each 0.01 to 10 parts by weight, and moisturizers, fertilizer components and heating aids are 0.01 to 10 parts respectively: L0 parts by weight, acidic substances. 01 to 1 part by weight. It should be noted that the blending ratio of the magnetic material may be appropriately determined as desired.

This blending ratio can also be applied to a reaction mixture and an exothermic mixture. The mobile water value of the reaction mixture is usually less than 0.01.

[0029] The water may be from a suitable source. There are no restrictions on the purity and type.

In the case of the exothermic composition, the water content is 1 to 70% by weight of the exothermic composition, more preferably 1 to 60% by weight, still more preferably 7 to 60% by weight, still more preferably 10 to 50% by weight, Preferably it contains 20 to 50% by weight.

In the case of a reaction mixture and an exothermic mixture before contact treatment with an oxidizing gas, 0.5 to 20% by weight of the reaction mixture or the exothermic mixture, more preferably 1 to 20% by weight, still more preferably 3 to 20% by weight. %, More preferably 4 to 15% by weight.

[0030] The carbon component is not limited as long as it contains carbon as a component. Carbon bra Examples include lac, black bells, activated carbon, carbon nanotubes, carbon nanohorns, and fullerenes. It may have conductivity by doping or the like. Examples include activated carbon prepared from coconut shells, wood, charcoal, coal, bone charcoal, and other raw materials such as animal products, natural gas, fats, oils and resins. In particular, activated carbon having adsorption retention ability is preferable.

In addition, as the carbon component, if iron powder containing a carbon component that does not necessarily need to be present alone and coated with Z or carbon component is used in the exothermic composition, the carbon component does not exist alone. The exothermic composition shall contain a carbon component.

[0031] The reaction accelerator is not limited as long as it can accelerate the reaction of the exothermic substance. Examples include metal halides, nitrates, acetates, carbonates, metal sulfates and the like. Metal halides include sodium chloride, potassium salt, magnesium salt, calcium salt, ferrous chloride, ferric chloride, sodium bromide, potassium bromide, ferrous bromide, Examples include ferric bromide, sodium iodide, potassium iodide and the like. Examples of nitrates include sodium nitrate and potassium nitrate. Examples of the acetate include sodium acetate. Examples of carbonates include ferrous carbonate. Examples of metal sulfates include potassium sulfate, sodium sulfate, ferrous sulfate and the like.

[0032] The water retention agent is not limited as long as it can retain water. Wood flour, pulp flour, activated carbon, sawdust, cotton fabric with a lot of fluff, cotton short fibers, paper scraps, plant material, and other plant porous materials with a large capillary function and hydrophilicity, activated clay Examples include hydrous magnesium silicate clay minerals such as zeolite, perlite, vermiculite, silica-based porous materials, fossils, volcanic ash-based materials (terra balloon, shirasu balloon, tyset balloon, etc.). In addition, in order to increase the water retention capacity of these water retention agents and to strengthen the shape maintenance power, it may be subjected to processing such as firing and Z or pulverization.

The water-absorbing polymer is not particularly limited as long as it has a crosslinked structure and has a water absorption ratio of 3 times or more with respect to its own weight. It may also be a cross-linked surface. Conventionally known water-absorbing polymers and commercially available products can also be used.

Examples of water-absorbing polymers include crosslinked poly (meth) acrylic acid and crosslinked poly (meth) acrylate. , Cross-linked poly (meth) acrylate ester having sulfonic acid group, cross-linked poly (meth) acrylate ester having polyoxyalkylene group, cross-linked poly (meth) acrylamide, (meth) acrylate and Cross-linked copolymer of (meth) acrylamide, cross-linked copolymer of hydroxyalkyl (meth) acrylate and (meth) acrylate, cross-linked polydioxolane, cross-linked polyethylene oxide, cross-linked polyvinyl pyrrolidone, sulfone-polystyrene cross-linked Body, crosslinked polypyridine, starch-poly (meth) acrylonitrile graft copolymer, starch-poly (meth) acrylic acid (salt) graft crosslinked copolymer, polybulualcohol and maleic anhydride (salt) Reaction products, cross-linked polybulal alcohol sulfonate, polybul Alcohol acrylate graft copolymers, polyisobutylene maleic acid (salt) cross-linking polymer, and the like as an example. These may be used alone or in combination of two or more.

The water-absorbing polymer having biodegradability in the water-absorbing polymer is not limited as long as it is a biodegradable water-absorbing polymer. Examples include crosslinked polyethylene oxide, crosslinked polyvinyl alcohol, crosslinked carboxymethyl cellulose, crosslinked alginic acid, crosslinked starch, crosslinked polyamino acid, crosslinked polylactic acid, and the like.

The pH adjuster is not limited as long as the pH can be adjusted. There are alkali metal weak acid salts and hydroxides, or alkaline earth metal weak acid salts and hydroxides.

twenty three

, NaHCO, Na PO, Na HPO, Na P O, NaOH ゝ KOH, Ca (OH), Mg (0

3 3 4 2 4 5 3 10 2

H) and Ca (PO) are examples.

2 3 4 2

The hydrogen generation inhibitor is not limited as long as it suppresses the generation of hydrogen. An example is a compound having at least one kind or two or more kinds selected from the group consisting of thio compounds, oxidizing agents, alkaline substances, io, antimony, selenium, phosphorus and tellurium. In addition, the iodo compound is a compound with an alkali metal or an alkaline earth metal, such as a metal sulfate such as calcium sulfate, a metal sulfite such as sodium sulfite, or a metal thiosulfate such as sodium sulfate. As an example.

Examples of the oxidizing agent include nitrate, oxide, peroxide, halogenated oxyacid salt, permanganate, chromate and the like.

As the aggregate, it is useful as a filler, and Z or making the exothermic composition porous There is no limit as long as it is useful. Fossil coral (coral fossil, weathered reef coral etc.), bamboo charcoal, Bincho charcoal, silica-alumina powder, silica-magnesia powder, kaolin, crystalline cellulose, colloidal silica, pumice, silica gel, silica powder, my strength powder, clay, talc Examples include powders and pellets of synthetic resins, foamed synthetic resins such as foamed polyester and polyurethane, algae, alumina, and fiber powder. Kaolin and crystalline cellulose are not included in the exothermic composition of the present invention.

Examples of the fibrous material include inorganic fibrous materials and Z or organic fibrous materials such as rock wool, glass fiber, carbon fiber, metal fiber, pulp, paper, non-woven fabric, woven fabric, cotton and hemp. Examples include natural fibers, regenerated fibers such as rayon, semi-synthetic fibers such as acetate, synthetic fibers, and pulverized products thereof.

The functional substance is not limited as long as it has a function, but examples include at least one selected from an anion generating substance and a far-infrared emitting substance. The negative ion generating substance is not limited, whether directly or indirectly, as long as negative ions are generated as a result. Examples include tourmaline, fossilized coral, granite, co-dielectrics such as calcium strontium propionate, ores containing radioactive materials such as radium and radon. The far-infrared emitting material is not limited as long as it emits far-infrared rays. Examples include ceramic, alumina, zeolite, zirconium and silica.

Examples of the surfactant include surfactants containing ion, cation, nonone and zwitterion. In particular, polyoxyethylene alkyl ethers, alkylphenol 'ethylene oxide adducts, higher alcohol phosphates, and the like, which are preferred as nonionic surfactants, can be mentioned.

The organosilicon compound is not particularly limited as long as it is a compound having at least Si—O—R and / or Si—N—R and / or Si—R bonds. Examples thereof include organic silane compounds such as methyltriethoxysilane, dimethyl silicone oil, polyorganosiloxane, and silicone resin compositions containing them in the form of monomers, low condensates, polymers, and the like. .

The pyroelectric substance is not limited as long as it has pyroelectricity (pie mouth electricity or pyro electricity). There is no limit. Examples include tourmaline and pyroelectric minerals. In particular, tourmaline which is a kind of tourmaline is preferable. Examples of tourmalines include drabite (mafic tourmaline), shawl (iron tourmaline), and elvite (lithia tourmaline).

The moisturizer is not limited as long as it can be moisturized. Examples include hyaluronic acid, collagen, dariserine, urea and the like.

The fertilizer component is not limited as long as it contains at least one of the three elements of nitrogen, phosphoric acid, and potassium. Examples include bone meal, urea, ammonium sulfate, lime superphosphate, potassium chloride, calcium sulfate and the like.

The hydrophobic polymer compound is a polymer compound having a contact angle with water of 40 ° or more, more preferably 50 ° or more, and even more preferably 60 ° or more in order to improve drainage in the composition. There is no limit. Examples include powders, granules, granules, tablets, etc. whose shape is not limited. Examples include polyolefins such as polyethylene and polypropylene, polyesters, polyamides, and the like.

Examples of the heat generation aid include metal powder, metal salt, metal oxide, Cu, Mn, Cu CI, FeCl, diacid manganese, cupric oxide, tetraacid tetraacid iron and the like. Mixture etc.

2 2 An example.

As the metal oxide other than the acid iron, any metal acid can be used as long as it does not inhibit the acid of the iron by the acid gas, but examples include manganese dioxide and cupric oxide. Examples of the acidic substance include hydrochloric acid, sulfuric acid, nitric acid, acetic acid, oxalic acid, succinic acid, malic acid, maleic acid, chloroacetic acid, iron chloride, sulfuric acid, which may be any of inorganic acids, organic acids, and acidic salts. Examples include iron, iron oxalate, iron citrate, salt-aluminum, salt-ammonium, hypochlorous acid, and the like.

The iron powder is preferably normal iron powder, iron alloy powder, active iron powder made of iron powder or iron alloy powder having an oxygen-containing film on at least a part of the surface of the iron powder. The iron oxide film is a film made of iron such as iron oxide, hydroxide, oxyhydroxide and the like containing oxygen. Active iron powder is a ferrous oxide film formed at least locally on the surface of the iron powder. Local batteries and pits inside and outside the iron oxide film are formed between the ground iron and the iron oxide film. By The oxidation reaction promoting effect can be obtained.

Examples of the iron powder include, but are not limited to, pig iron iron powder, atomized iron powder, electrolytic iron powder, reduced iron powder, sponge iron powder, and iron alloy powder thereof. In addition, these iron powders may contain carbon or oxygen, or iron containing 50% or more of iron and other metals! The type of metal contained in the alloy is not particularly limited as long as the iron component acts as a component of the exothermic composition, but metals such as aluminum, manganese, copper, nickel, silicon, cobalt, palladium and molybdenum, semiconductors, etc. Is given as an example. The metal of the present invention includes a semiconductor. These metals and alloys may be present only on the surface or on the inside, or on both the surface and the inside.

In the iron powder of the present invention, the content of the metal other than iron is usually 0.01 to 50% by weight, preferably 0.1 to 10% by weight, based on the whole iron powder.

[0034] As the iron powder having an oxygen-containing film on at least a part of the iron surface,

A. Active iron powder in which the essential components of the exothermic composition or those added with acidic substances and other necessary components are contacted with an oxidizing gas to partially oxidize the iron component and at least partially oxidize the surface of the iron component

In X-ray peak intensity ratio of the content force iron B. wustite, active iron powder 2-50 weight ^_0/0

C. Iron powder having an iron oxide film with a thickness of 3nm or more on the surface

D. A mixture of active iron powder and iron powder other than active iron powder is an example.

[0035] About A

The mechanism is not in any detail, but due to the contact between the acidic gas and the component, the oxidation of the component, particularly the iron powder, the iron oxide film on the surface of the iron powder, that is, the oxygen-containing film The surface of the activated carbon is also oxidized, and the Z or oxidized iron component adheres, both are imparted with hydrophilicity, and are improved. It is estimated that

That is, an iron oxide film is formed on the surface of the iron powder, the iron powder particles become irregularly shaped, distortion occurs due to acid and soot, water-containing pits are formed, some kind of functional change occurs, It is presumed that iron powder is activated and heat generation is improved.

In addition, when magnetite (Fe 2 O 3) is present in the iron oxide film, it has excellent conductivity. In addition, the presence of hematite (Fe 2 O 3) is also preferable because it becomes porous.

twenty three

In addition, it is presumed that the surface of the carbon component is oxidized to become a carbon component with a large amount of surface oxide, the hydrophilicity is increased, and the activity is also increased.

The thickness of the iron oxide film, which is an oxygen-containing film covering the surface of the iron powder, is usually 3 nm or more, preferably 3ηπι to 100 / ζ πι, more preferably, using Auger electron spectroscopy. More preferably 30 nm to 100 μm, more preferably 30 nm to 50 μm, still more preferably 30 ηπι to 1; ζ πι, more preferably 30 nm to 500 nm, still more preferably 50 nm. ~ 300nm. By setting the thickness of the iron oxygen-containing film to 3 nm or more, the thickness of the iron oxygen-containing film can exert the effect of promoting the oxidation reaction, and contact with an oxidizing gas such as air causes the oxidation reaction. You can get started right away. If the thickness of the iron oxygen-containing film is 100 m or more, the heat generation time may be shortened, but it can be used depending on the application.

Further, according to the above active iron powder, a reaction having iron powder, a reaction accelerator and water as essential components, a water content of 0.5 to 20% by weight, and an easy water value indicating an excess water amount of less than 0.01. By using the mixture, the reaction rate during the contact treatment with the oxidizing gas can be increased, and the time for the temperature rise of the reaction mixture to be 1 ° C or higher can be achieved within 10 minutes. By shortening the time to reach the predetermined temperature or more, proper activation can be achieved and unnecessary oxidation on the iron powder can be prevented. In addition, exothermic compositions with an easy-moving water value of 0.01 to 50 by adding carbon components, etc. to the exothermic mixture produced by contacting the reaction mixture with an oxidizing gas and adjusting the water content are appropriate. It has stickiness and excellent moldability, and through-molding method or swallow molding method can be applied, and heat-generating packs of various shapes can be produced. In particular, exothermic compositions having a mobile water value of 0.01 to 20 start an exothermic reaction as soon as they come into contact with air, have excellent exothermic rise properties, and have excellent moldability. .

The oxidizing gas contact treatment method of the reaction mixture consists of iron powder, a reaction accelerator and water as essential components, a water content of 0.5 to 20% by weight and a mobile water value of less than 0.01. Is not particularly limited as long as the temperature of the reaction mixture is increased to 1 ° C or more by contact treatment with an oxidizing gas, but as a specific example,

1. An exothermic mixture containing iron powder with a reaction mixture of iron powder, reaction accelerator, and water in an oxidizing gas atmosphere that causes a self-heating reaction to partially oxidize the iron powder and have an iron oxide film on the surface Manufacturing method,

2. A method for producing an exothermic mixture in which a reaction mixture of iron powder, reaction accelerator, acidic substance and water is reacted in a self-exothermic atmosphere in an oxidizing gas atmosphere,

3. A method for producing an exothermic mixture in which a reaction mixture of iron powder, reaction accelerator, carbon component and water is subjected to a self-exothermic reaction in an oxidizing gas atmosphere,

4. A method for producing an exothermic mixture in which a reaction mixture of iron powder, reaction accelerator, acidic substance, carbon component and water is subjected to a self-exothermic reaction in an oxidizing gas atmosphere,

5. Production of exothermic mixture containing partially iron oxide powder in which the reaction mixture or exothermic mixture described in any one of 1 to 4 contains components other than the above-mentioned components and the method described in any one of 1 to 4 is performed. Method,

6. A method for producing an exothermic mixture, wherein the method described in any one of 1 to 5 is performed in an environment heated to 10 ° C or higher from the environmental temperature,

7. A method for producing an exothermic mixture in which the method described in any one of 1 to 6 is performed by blowing an acidic gas.

8. A method for producing an exothermic mixture, which is performed by blowing an acidic gas heated to 10 ° C or higher from the environmental temperature by the method described in 7.

9. A method for producing an exothermic composition in which the oxidizing gas contact treatment is performed until the maximum temperature, which is the highest temperature rise due to an exothermic reaction, is exceeded by the method described in any one of 1 to 8.

10. Use the method described in any one of 1 to 8 above for the exothermic mixture in which the oxidizing gas contact treatment is performed until the temperature exceeds the maximum temperature due to the exothermic reaction and further decreases to at least 10 to 20 ° C from the maximum temperature. Production method,

11. Use the method described in any one of 1 to 8 above to carry out the oxidizing gas contact treatment until the maximum temperature, which is the highest temperature rise due to the exothermic reaction, is exceeded, and then shut off the oxidizing gas and at least A process for producing an exothermic composition that holds the temperature of the reaction mixture until the maximum temperature power also falls by at least 10-20 ° C,

12. One example is a method for producing an exothermic mixture in which the reaction mixture or exothermic mixture described in any one of 1 to 5 is heated to 1 ° C or higher in an oxidizing gas environment. Furthermore, other components may be added to the exothermic mixture, and further treated with an oxidizing gas to form an exothermic mixture.

The reaction mixture environment during the oxidizing gas contact treatment is not limited as long as it is in contact with oxidizing gas in an environment of o ° c or higher and the temperature rise of the reaction mixture is set to c within 10 minutes. When performing in an open system, it may be present in a container without a lid, or it may be in a state in which an oxidizing gas such as air enters through a breathable sheet-like material such as a nonwoven fabric.

Further, the acidic gas contact treatment may be either batch type or continuous type under stirring, non-stirring, flowing or non-flowing.

As the final heating yarn and composition,

1) An exothermic composition using the exothermic mixture produced by the method described in any one of 1 to 12 above as an exothermic composition raw material,

2) Exothermic composition obtained by adding other components to the exothermic composition of 1),

3) Any one of the exothermic compositions obtained by adjusting the water content of the exothermic composition described in either 1) or 2) can be used. In addition, there is no restriction on the order of the addition of ingredients other than the essential ingredients and the timing of moisture adjustment.

Here, the water content in the reaction mixture and further in the exothermic mixture before the oxidizing gas treatment is usually 0.5 to 20% by weight, preferably 1 to 15% by weight, more preferably 2 to 10%. % By weight, more preferably 3 to 10% by weight, more preferably 6 to 10% by weight. The temperature of the reaction mixture after contact with the oxidizing gas is such that the temperature rise is 1 ° C or more. If there is no limitation, it is preferably 1 to 80 ° C, more preferably 1 to 70 ° C, still more preferably 1 to 60 ° C, and further preferably 1 to 40 ° C. is there.

The environmental temperature at the time of contact between the reaction mixture and the oxidizing gas is not limited as long as the temperature of the reaction mixture rises above a predetermined level, but is preferably 0 ° C or higher, more preferably 0 to 250 ° C. Further, it is preferably 10 to 200 ° C, more preferably 20 to 150 ° C, still more preferably 25 to 100 ° C, and further preferably 25 to 50 ° C.

There is no limit as long as the temperature rise of the reaction mixture at the time of contact between the reaction mixture and the oxidizing gas is 1 ° C or more, and the time is within 10 minutes, but it is preferably 1 second to 10 minutes, more preferably Is 1 second to 7 minutes, more preferably 1 second to 5 minutes, more preferably 2 seconds to 5 minutes, still more preferably 2 seconds to 3 minutes, and even more preferably 2 seconds to 1 minute. It is.

The temperature of the oxidizing gas is not limited as long as the environmental temperature is maintained.

The oxidizing gas may be any gas as long as it is acidic and oxygen gas, air, or a mixed gas of an inert gas such as nitrogen gas, argon gas, helium gas and oxygen gas is an example. As mentioned. The mixed gas is not limited as long as it contains oxygen, but air is particularly preferred among these, which preferably contain 10% or more of oxygen gas. If desired, catalysts such as platinum, palladium, iridium and their compounds can be used.

The oxidation reaction can be carried out in an oxidizing gas atmosphere with stirring, if desired, under pressure, and further under Z or ultrasonic irradiation.

The optimum conditions for the acid-acid reaction may be appropriately determined experimentally.

The amount of oxidizing gas used may be adjusted according to the type of oxidizing gas without restriction, the type and particle size of iron powder, the amount of water, the processing temperature, and the processing method.

In the case of an open system, there is no limit as long as the required oxygen amount can be taken in. In order to prevent the reaction mixture from splashing and mixing of dust, open systems should be used so long as they can be surrounded by a breathable material such as nonwoven fabric or woven fabric.

When air is used in the method of blowing oxidizing gas, as an example, for 200 g of iron powder, the amount of air is preferably 0.01 to: LOOO liters Z, more preferably 0 at 1 atm. 01-: L00 liters Z minutes, more preferably 0.1-50 liters Z minutes. In the case of other oxidizing gases, the oxygen concentration may be converted based on the case of air.

If desired, peracid additives may be added. Hydrogen peroxide and ozone are examples.

Here, the state of the reaction mixture or the exothermic mixture at the time of the contact treatment with the oxidizing gas is appropriately selected depending on whether the iron powder is partially oxidized, whether it is a stationary state, a moving state, or a fluidized state by stirring. do it. In addition, there is no limitation in the acidic gas atmosphere or in the acidic environment where the environment during the contact treatment with the mixed oxidizing gas at the time of mixing each component of the reaction mixture, exothermic mixture and exothermic composition is adjusted. An example is gas blowing. [0037] The method for measuring the temperature rise of the heating yarn and the composition is as follows.

1) Leave the exothermic composition in a non-breathable outer bag for 1 hour under the condition of ambient temperature 20 ± 1 ° C.

2) Install a magnet so as to cover the shape of the punched hole in the mold near the center of the back of the support plate made of chlor chloride (thickness 3mm x length 600mm x width 600mm).

3) Place the temperature sensor on the center of the support plate.

4) Thickness with a pressure-sensitive adhesive layer of about 80 μm thickness 25 ^ m X length 250 mm X width 200 mm Attached to the support plate through the adhesive layer so that the center of the polyethylene film is at the sensor wear.

5) Remove the exothermic composition from the outer bag.

6) Place a template of length 250mm x width 200mm with a hole of 80mm length x width 50mm x height 3mm on the center of the polyethylene film, place the sample near the hole, and push it in Is moved along the template, put the sample into the punched hole while pushing the sample, scrape while pushing the sample along the template surface (mold push molding), and fill the sample in the mold. Next, temperature measurement is started except for the magnet under the support plate.

Use a data collector to measure the exothermic temperature, measure the temperature for 10 minutes at a measurement timing of 2 seconds, and determine the heat build-up property based on the temperature after 3 minutes.

The heat generation test of the heat generation pack shall follow the JIS temperature characteristic test.

[0038] At least part of the surface of the iron powder or active iron powder in the exothermic composition subjected to the oxidizing gas treatment is coated with an iron-containing oxygen film. The covering degree of the surface of the iron oxygen-containing film may be the entire surface as long as at least a part of the surface is covered. In the case of the exothermic composition of the present invention, ions of the reaction accelerator such as chlorine ions are contained in the exothermic composition, and therefore, there is no anticorrosive effect on the oxide film due to the corrosion effect by the ions of the reaction accelerator such as chlorine ions. This is a kind of corrosion and does not inhibit the acid-oxidation reaction. In particular, when an oxygen-containing film of iron is formed in the presence of reaction accelerator ions such as chlorine ions, the effect is significant. In the case where a metal other than iron is present on the surface, at least a part of the portion other than the metal other than iron may be covered with an oxygen-containing film of iron! /.

In the iron powder of the present invention, 1.Whole surface (uniform) corrosion,

2. Pitting corrosion, crevice corrosion,

3. Stress corrosion cracking, etc. occurs, resulting in an equal area, as well as irregularities and gaps. For this reason, it is estimated that it has hydrophilicity and oxidation catalytic properties (FeO, etc.) in its own part. Having an oxygen-containing film on its own part of mixing is important for producing exothermic compositions. In particular, the iron component which is a contact accelerator with an oxidizing gas containing an iron component as a reaction accelerator and water as an essential component has a reaction active part mainly composed of oxides, hydroxides, chlorine ions, hydrogen ions and the like. It is thought that exothermic reactivity and hydrophilicity are improved, and exothermic rise and moldability are remarkably improved.

[0039] About B

The amount of FeO (wustite) contained in the iron component containing the predetermined amount of wustite is usually 2 to 50% by weight, preferably 2 to 40% by weight, more preferably, in terms of the X-ray peak intensity ratio with iron. It is 2 to 30% by weight, more preferably 5 to 30% by weight, and further preferably 6 to 30% by weight. Even if it exceeds 50% by weight, the heat buildup is good, but the heat generation duration is shortened. If it is less than 2% by weight, the heat build-up property becomes dull.

The thickness of the oxygen-containing film of the iron powder having the predetermined amount of oxygen-containing film or wustite is applied to the exothermic composition or the exothermic composition molded body during lamination.

[0040] The iron powder contains a carbon component and iron powder coated with Z or a carbon component is also preferred. If the iron component is 50% by weight or more with respect to the carbon component, the ratio of the carbon component is Although there is no limitation, iron powder partially covered with 0.3 to 3.0% by weight of conductive carbonaceous material is useful. Examples of conductive carbonaceous materials include carbon black, activated carbon, carbon nanotubes, carbon nanohorns, fullerenes, etc. Iron powder that may be conductive by doping is reduced iron powder or atomized iron powder. Sponge iron powder can be cited as an example. In particular, the case where the conductive carbonaceous material is activated carbon and the iron powder is reduced iron powder is useful for the heat-generating pack.

Also, 0. conductive carbonaceous material coated so as not to impair the flowability of the iron powder in order to perform efficiently from 01 to 0.05 weight ^_0/0 of oils, such as spindle oil or the like may be添Ka卩.

[0041] Easy water value of exothermic composition in exothermic pack and mixture or exothermic composition in exothermic pack When measuring the thickness of the iron oxide film of the iron powder and the amount of wustite, the exothermic composition or mixture may be measured according to each item. That is,

1) Easy water level

The exothermic composition is taken out from the exothermic pack and measured according to the method for measuring the mobile water value.

2) Iron powder thickness of iron oxide film, amount of wustite

In a nitrogen atmosphere, a heat-generating composition, a heat-generating composition molded body, a heat-generating composition compressed body or a mixture is dispersed in ion-exchanged water substituted with nitrogen, iron powder is separated with a magnet, and dried under a nitrogen atmosphere. Use a sample for measurement.

[0042] The exothermic composition of the present invention contains iron powder, a carbon component, a reaction accelerator, and water as essential components, and the production method thereof can be industrially put into practical use. The iron powder, the reaction accelerator, and water are used. As an essential component, a reaction mixture with a water content of 1 to 20% by weight and a mobile water value indicating excess water of less than 0.01 is brought into contact with an oxidizing gas in an environment of 0 ° C or higher and within 10 minutes. The temperature of the reaction mixture is raised to 1 ° C or more to produce an exothermic mixture, and the exothermic mixture is used as a raw material to make an exothermic composition. The exothermic composition may be made by adding a carbon component or the like and adjusting the water content.

In the present invention, the water content of the reaction mixture is set to a certain amount or less, particularly the excess water amount is set to a certain amount or less, and the oxidizing contact treatment can be performed in a short time. By specifying the amount of excess water and treating for a short time, adverse effects caused by the oxidizing gas contact treatment such as poor initial heat generation of the exothermic composition and shortened heat generation retention time can be avoided. Industrial mass production method was established. Further, during the oxidizing gas contact treatment, it is not necessary to perform stirring or the like, but if the stirring is performed, the acidic gas contact treatment can be surely performed.

Here, the state of the reaction mixture or the exothermic mixture in the contact treatment with the oxidizing gas may be appropriately determined as long as the iron powder is partially oxidized, whether it is a stationary state, a moving state, or a fluidized state by stirring. Just choose. Also, examples include an oxidizing gas atmosphere and an oxygen-containing gas blowing, in which there are no restrictions on the environment when mixing the components of the reaction mixture, the exothermic mixture, and the exothermic composition and at the time of moisture adjustment.

[0043] The moisture adjustment means that the exothermic mixture is subjected to contact treatment with an oxidizing gas and then water or reaction accelerator water. It is to cover the solution. There is no restriction on the amount to be added, but it is possible to list the weight reduced by the contact treatment and the weight at which the desired water mobility value can be obtained as an example. Whether or not moisture adjustment is performed may be appropriately determined depending on the application.

[0044] The exothermic composition of the present invention comprises iron powder, a carbon component, a reaction accelerator and water as essential components, and a reaction mixture containing iron powder, a reaction accelerator and water as essential components is contact-treated with an oxidizing gas. This is an exothermic composition having excellent moldability, which is obtained by adjusting the moisture content of an exothermic mixture and is combined with an appropriate amount of surplus water that has a high exothermic rise. It can also be used to produce a heat-generating pack that warms up quickly when in use.

Therefore, at least the iron powder, including the carbon component, has a history of oxidation due to the contact treatment of the acidic gas, and this is deeply related to excellent heat buildup, heat generation sustainability and excellent moldability. Seem.

[0045] When the iron powder subjected to the contact treatment with the oxidizing gas of the present invention is used, carbon components such as activated carbon in the exothermic composition can be reduced by, for example, 20% or more. Decreasing the amount of carbon component added reduces costs.

[0046] According to the method for producing an exothermic mixture of the present invention, an exothermic composition having excellent exothermic rising property, excellent hydrophilicity, and excellent moldability can be obtained. When used in combination with a mobile water value of 0.01 to 50, particularly 0.01 to 20, an exothermic composition having remarkably excellent moldability and exothermic properties can be obtained.

The exothermic composition produced by the production method of the present invention has remarkably improved exothermic rise, so the amount of carbon components such as activated carbon in the exothermic composition can be reduced by, for example, 20% or more, thereby reducing costs. Can contribute.

In addition, since the hydrophilicity is remarkably improved, the moldability using the mold is remarkably improved, so that the pieces of the exothermic composition are not scattered around the exothermic composition molded body after molding, so that the seal is not scattered. A heat-generating pack that can be accurately and does not break the seal can be manufactured. Thereby, various shapes of exothermic composition molded bodies can be produced, and various shapes of exothermic packs can be obtained.

[0047] From the viewpoint of improving the heat build-up property of the heat-generating composition, the following are preferable.

1) An essential component of the exothermic composition, or an acid substance or other necessary component added to it Those that have been contacted with an oxidizing gas (self-heating, etc.), those that have been moisture-adjusted, or other ingredients added and mixed to form a heat-generating composition.

2) Use any of the following active iron powders having an oxygen-containing film such as an oxide on at least a part of the surface as iron powder. a) Iron powder with an oxygen-containing film of iron with a thickness of 3 nm or more obtained by Auger electron spectroscopy on the surface of the iron powder. b) Iron powder with a wustite content of 2 to 50% by weight in terms of X-ray peak intensity ratio with iron.

3) A mixture of active iron powder having an oxygen-containing film such as oxides on at least part of the surface of the iron powder mixed with iron powder not having an oxygen-containing film is used as the iron powder. In this case, it is preferable to use a mixture in which the active iron powder is 60% by weight or more and the iron powder other than the active iron powder is less than 40% by weight.

[0048] In the case where the exothermic composition treated with the oxidizing gas or the exothermic composition containing active iron powder and the one using the exothermic composition are stored for a long time, it is preferable to combine a hydrogen generation inhibitor. As a result, the generation of hydrogen is suppressed, and a heat generation pack having excellent heat generation characteristics with good heat generation and no swelling of the outer bag during storage can be obtained.

[0049] In addition, the exothermic composition other than the mobile water value of 0.01 to 20 has a water-soluble polymer, an agglomeration aid, an agglomeration aid, and an agglomeration aid within a range not affecting the rise characteristics. , Dry binder, dry binder, dry binder, adhesive material, thickener, excipient, flocculant, soluble adhesive material.

[0050] In addition, since the heat-generating pack that stores the heat-generating composition in a storage bag provided on the market is provided on the assumption that it can be stored in an outer bag that is a non-breathable storage bag and stored for a long time, It is preferable to use an exothermic composition containing a raw inhibitor. Since the exothermic composition that has undergone the oxidizing gas contact treatment is an active composition, it is important to contain a hydrogen generation inhibitor. In addition, the combined use of the pH adjuster further enhances the efficacy.

[0051] In addition, the exothermic composition having an easy water value of less than 0.01 has a coagulant aid, coagulant, agglomerate aid, dry binder, A binder, a dry binder, an adhesive material, a thickener, an excipient, and a water-soluble polymer may be contained within a range of 0.01 to 3 parts by weight, respectively.

The agglomeration aid is described in Japanese Patent No. 3161605 (Japanese Patent Publication No. 11-508314). The agglomeration aids listed are gelatin, natural gum, corn syrup and the like.

The aggregating agent is an aggregating agent described in JP-T-2002-514104, such as corn syrup, manoletino resyrup and the like.

The agglomeration aid is an agglomeration aid described in JP-T-2001-507593, such as corn syrup.

The dry binder is a dry binder described in JP-T-2002-514104, and is microcrystalline cellulose, maltodextrin, or a mixture thereof. The dry binder is a dry binder described in JP-T-2001-507593 and includes maltodextrin, sprayed lactose, and the like.

The dry binder is a dry binder described in JP-A-11-508314, and is microcrystalline cellulose, maltodextrin, or the like, or a mixture thereof.

The adhesive material or binder is an adhesive material or binder described in JP-A-4-293989, such as water glass, polyvinyl alcohol (PVA), and carboxymethyl cellulose (CMC).

The thickener is a thickener described in JP-A-6-343658, such as corn starch or potato starch.

The excipient is an excipient described in Japanese Patent Application Laid-Open No. 7-194641, such as pregelatinized starch and sodium alginate.

As the water-soluble polymer, a water-soluble polymer in the pressure-sensitive adhesive layer can be used.

The particle size of the water-insoluble solid component constituting the moldable exothermic composition of the present invention is not limited as long as the exothermic composition has moldability. When any one of the vertical, horizontal, and height sizes of the exothermic composition molded body obtained by molding the exothermic composition is small, the moldability is improved by reducing the particle size.

Furthermore, it is preferable in terms of molding to reduce the particle size of the solid component constituting the moldable exothermic composition. Among the components constituting the moldable exothermic composition, the maximum particle size of the water-insoluble solid component excluding the reaction accelerator and water is preferably 2.5 mm or less, more preferably 930 m or less, and even more preferably 500. / zm or less, more preferably 300 / zm or less, more preferably 250 m or less, and even more preferably 200 m or less, and the solid component 80% or more of the particle size is usually 500 μm or less, preferably 300 μm or less, more preferably 250 / zm or less, still more preferably 200 / zm or less, more preferably It is 150 m or less, more preferably 100 μm or less.

The particle size of the water-insoluble solid component is a particle size obtained by separating the particles using a sieve and passing through the sieve and calculating the caliber force of the sieve. That is, the sieve is arranged from the top, such as 8, 12, 20, 32, 42, 60, 80, 100, 115, 150, 200, 250, and 280 mesh. Match. Place about 50 g of water-insoluble solid component particles in the top 8 mesh sieve and shake for 1 minute with an automatic shaker. Weigh the water-insoluble solid component particles on each sieve and tray, and determine the particle size distribution by the weight fraction with the total as 100%. When the total of all the trays under the comb of the specific mesh reaches 100% which is the total value of the particle size distribution, the caliber force of the specific mesh is also calculated ( _μm ) and its water-insoluble property The particle size of the solid component. Each mesh sieve may be combined with other mesh sieves. Here, the 16 mesh path has a particle size of 1 mm or less, the 20 mesh path has a particle size of 850 μm or less, the 48 mesh path has a particle size of 300 μm or less, the 60 mesh path has a particle size of 250 μm or less, and the 65 mesh path has Particle size 200 μm or less, 80 mesh pass particle size 180 m or less, 100 mesh pass particle size 150 m or less, 115 mesh pass particle size 120 / zm or less, 150 mesh pass particle size 100 / zm or less The 250 mesh pass should have a particle size of 63 μm or less. The same applies to the following meshes.

[0053] The exothermic composition is a powder or granular exothermic composition depending on the moisture adjustment state and the amount of excess water.

(Easily moving water value is less than 0.01), Moldable exothermic composition (Easily moving water value is 0.01 to 20), Shear-bed exothermic composition (Easily moving water value is over 20 and under 50) Can be classified. Exothermic compositions classified according to mobile water values are as described above.

[0054] The formability in the present invention means that a laminate of a heat generating composition in the shape of a punched hole or a concave mold is formed by die-through molding using a punching die having a punched hole or by squeeze molding using a concave mold. In addition, it indicates that the molded shape of the exothermic composition molded body is maintained after molding including mold release. If there is moldability, the heat-generating composition molded body is covered with at least the covering material, and the shape is maintained until the seal portion is formed between the base material and the covering material. Can be sealed, and the exothermic composition is broken in the seal! / Since there is no scattered sesame seeds, the seal can be sealed without being broken. The presence of sesame is the cause of seal failure Become.

Next, a measurement apparatus, a measurement method, and a determination method will be described for the moldability.

1) Measuring equipment

For the measuring device, a stainless steel mold on the upper side of the endless belt that can run (with a central part of 60mm x 40mm in width and four corners of R5 treated with R5 thickness 2mm x length 200mm x width 200mm Plate> and a wearable plate that can be fixed, and a magnet (thickness 12.5 mm x length 24 mm x width 24 mm, two magnets in parallel) on the lower side of the endless belt. The magnet covers a region that is larger than the region covered with the edge (40 mm) in the direction perpendicular to the advancing direction of the punching hole of the mold and the vicinity thereof.

2) Measurement method

For the measurement method, a stainless steel plate with a thickness of lmm x length 200 mm x width 200 mm was placed on the endless belt of the measuring device, and a polyethylene film with a thickness of 70 ^ m x length 200 mm x width 200 mm was placed on it. Furthermore, a stainless steel mold is placed thereon. Then, after fixing the scraping plate at a position of 50 mm from the advancing end of the endless belt of the punching hole of the mold, 50 g of the exothermic composition is placed near the scraping plate between the scraping plate and the punching hole to endlessly The shaped belt is moved at 1.8 mZmin, and the exothermic composition is scraped off and filled into the punching hole of the mold.

After the mold has completely passed through the scraping plate, the running of the endless belt is stopped. Next, the mold is removed and the exothermic composition molded body laminated on the polyethylene film is observed.

3) Judgment method

With respect to the determination method, a heat generating composition molded body having a maximum length of 300 to 800 m without a broken piece of the exothermic composition molded body having a maximum length exceeding 800 m at the peripheral portion of the heat generating composition molded body. It is assumed that the exothermic composition has formability when there are 5 or less pieces. The moldability is an essential property for the exothermic composition used in the molding method. Without this, it is impossible to manufacture a heat generating pack by a molding method.

The exothermic composition of the present invention has compression resistance. Here, compression resistance refers to exothermic composition having a thickness of 70% of the mold thickness obtained by compressing the exothermic composition molded body contained in the mold. The compacted body retains an exothermic rise of 80% or more of the exothermic rise of the exothermic composition molded body before compression (temperature difference between 1 minute and 3 minutes after the start of the exothermic test of the exothermic composition). That is.

Here, a method for measuring the heat build-up property for compression resistance will be described.

1. Exothermic composition molded body,

1) Install a magnet so as to cover the hole shape of the mold near the center of the back of the support plate made of vinyl chloride (thickness 5mm x length 600mm x width 600mm) on the support base with legs.

2) Place the temperature sensor on the center of the surface of the support plate.

3) Thickness with adhesive layer of about 80 μm thickness 25 ^ m X length 250 mm X width 200 mm Polyethylene film attached to the support plate through the adhesive layer so that the center of the polyethylene film is at the sensor wear.

4) Length 280mm X Width 150mm X Thickness 50 μm to 2 mm on the floor plate 230 mm X Width 15 5 mm X Thickness 25 μm to 100 μm One end of the polyethylene film is about 20 mm outside the floor plate The polyethylene should be placed so that one end is almost coincident with one end of the floorboard.

5) Place a template of length 230mm x width 120mm x thickness 3mm with a hole of 80mm length x width 50mm x height 3mm on the polyethylene film on the slab. In that case, one end in the length direction of the template is aligned with one end where the base plate and the polyethylene film are placed in alignment, and further, in the width direction, the end opposite to the side where the polyethylene film protrudes outside the base plate Place the template on the polyethylene film so that one end of the template width is at the center of about 20 mm. Next, it is placed on the support plate together with the floor plate.

6) Place the sample in the vicinity of the punched hole, move the push plate along the template, put the sample into the punched hole while pushing the sample, and scrape it while pushing the sample along the template surface (mold push molding) Fill the mold with the sample.

7) Except the magnet under the support plate, press the end of the protruding polyethylene film, remove the floor plate, and start temperature measurement.

2. Exothermic composition compact

1) to 6) are the same as in the case of the exothermic composition molded body. 8) Because of the relationship between the punched hole and the unevenness, place a die with a 0.9mm thick convex part that fits almost exactly into the punched hole and align it with the punched hole and compress it with a roll press or plate press. Create a heat-generating composition compact with a thickness of 2.1 mm in the mold (compress to 70% of the mold thickness).

9) Place it on the support plate together with the base plate, remove the magnet under the support plate, press the end of the protruding polyethylene film, remove the base plate, and start temperature measurement.

The exothermic temperature is measured using a data collector, measuring the temperature for 2 minutes at a measurement timing of 2 seconds, and determining the compression resistance based on the temperature difference between 1 minute and 3 minutes later.

The thickness after compression is preferably 50 to 99.5% of the mold thickness, more preferably 60 to 99.5%, still more preferably 60 to 95%.

In the present invention, the exothermic composition molded body includes a exothermic composition compressed body.

The maximum width of the segmented heat generating portion or the heat generating composition molded body of the present invention is usually 0.5 to 60 mm, preferably 0.5 to 50 mm, more preferably 1 to 50 mm, and still more preferable. Or 3 to 50 mm, more preferably 3 to 30 mm, still more preferably 5 to 20 mm, still more preferably 5 to 15 mm, and still more preferably 5 to 10 mm. The maximum height is usually 0.1 to 30 mm, preferably 0.1 to 10 mm, more preferably 0.3 to 10 mm, still more preferably 1 to 10 mm, and still more preferably. 2-10mm. The longest length is usually 5 to 300 mm, preferably 5 to 200 mm, more preferably 5 to: LOOmm, still more preferably 20 to 150 mm, still more preferably 30 to L00 mm. It is.

The volume of the divided heat generating part or the volume of the exothermic composition molded body is usually from 0.015 to 500 cm ³ , preferably. 04-30 cm ³ and more preferably. l- ³⁰ cm ³ , more preferably l- ³⁰ cm ³ , more preferably 3-20 cm ³ .

In the divided heat generating portion, when the divided heat generating portion, which is a heat generating composition storage area, is filled with the heat generating composition molded body, the volume of the heat generating composition molded body, which is the heat generating composition molded area, and the heat generating composition storage area. The volume ratio with the volume of the divided heat generating portion is usually 0.6 to 1, preferably ί or 0.7 to 1, more preferably ί or 0.8 to 1, and further preferably ί or 0.00. 9 to 1.0. In addition, the width of the divided portion, which is the interval between the divided heat generating portions, is not limited as long as it can be divided. Force Usually 0.1 to 50 mm, preferably 0.3 to 50 mm, more preferably 0.3 to 50 mm. Yes, more preferably 0.3 to 40 mm, further preferably 0.5 to 30 mm, more preferably 1.0 to 20 mm, and further preferably 3 to 10 mm.

In addition, the shape of the exothermic composition molded body or the divided heat generating portion may be any shape, but examples thereof include a flat shape, such as a circle, an ellipse, a polygonal shape, a star shape, and a flower shape. In three-dimensional shape, polygonal cone shape, cone shape, frustum shape, sphere shape, parallelepiped shape, cylindrical shape, semi-cylindrical shape, semi-elliptical column shape, bowl shape, cylindrical shape, elliptical column shape An example is the shape. In addition, these shapes may be rounded at the corners, and the corners may be curved or curved, and there may be a recess in the center.

The volume of the exothermic composition part molded body of the present invention means the volume of the exothermic composition molded body or the compressed exothermic composition molded body.

Further, the volume of the segmented heat generating part means the internal volume of the segmented heat generating part containing the exothermic composition molded body.

[0057] The segmented heat generating section having the above-described components is formed by laminating a heat-generating composition molded body obtained by molding a moldable heat-generating composition by a molding method on a substrate, and covering the base material with a covering material. Typically formed by heat sealing the part. Preferably, each section heat generating part has a similar amount of exothermic composition molded body and also has similar oxygen permeation means. However, the amount of exothermic composition molded body, the shape of the segment heating element, and the oxygen permeability should be classified as long as the resulting segmental heating element temperature is within the accepted treatment and safety range for the intended use. It can be different for each heating part.

[0058] The rate, duration and temperature of the exothermic oxidation reaction of the exothermic composition molded body can be achieved by changing the contact area with air, more specifically, by changing the diffusion Z permeability of oxygen. Controlled as follows. Preferably, each of the divided heat generating portions has the same oxygen permeation means as the heat generating composition molded body having the same volume. Alternatively, the volume, shape and oxygen permeation means of the exothermic composition molded body can be changed for each section heat generating section as long as the resulting section heating section temperature is the same.

[0059] There is a first outer packaging material on the first surface of the heat generating pack, which is attached to the substrate by the first adhesive layer. It is worn. There is a second outer wrapping on the second surface, which is attached to the substrate by a second adhesive layer. Preferably, the first outer packaging material and the second outer packaging material have the same material force, and the first adhesive layer and the second adhesive layer have the same material force.

[0060] The first outer packaging material and the first adhesive layer are preferably more air permeable than in the covering material. Furthermore, the first outer wrapping material and the first adhesive layer preferably do not change to such an extent that the oxygen permeability of the coating material can be sensed. Therefore, only the covering material controls the flow rate of oxygen to each heat generating section.

[0061] Further, when the outer packaging material is provided outside the base material and the covering material, there is no limitation, but it is preferable to provide the outer packaging material via an adhesive layer or an adhesive layer. In particular, it is preferable to provide via an adhesive layer. The pressure-sensitive adhesive layer is composed of a pressure-sensitive adhesive, and the pressure-sensitive adhesive layer can be used.

[0062] The fever pack of the present invention is easy to adapt to a wide range of body contours and provides a sustained, convenient and comfortable heat delivery and excellent compatibility with body shape while the pack is in use during crease. Maintain sufficient rigidity to prevent bulging and prevent easy exfoliation of the contents of the segmented heating element.

[0063] In addition, the heat generation pack includes a plurality of individual section heat generating sections, and the individual section heat generation section typically has a heat-generating composition molded body, and preferably involves a specific iron oxidation reaction. Has predetermined physical dimensions and encapsulation characteristics that are fixed at intervals along the heat generating pack. Since the heat generating pack consisting of the heat generating section composed of the section heat generating section and the section heating section is non-flexible and the section heating section is flexible, the section works as a hinge between the section heat generating sections, and the section heat generation. Turn preferentially over club. As a result, the heat generating pack maintains the structural support of the segmented heating element, prevents unacceptable stretching of the structure of one or more continuous layers during processing or use, and the contents of the segmented heating element. One or more fever packs are effective and effective by having excellent adaptability with the user's body when incorporated into the fever pack of the present invention, so as to prevent easy access to objects. .

[0064] Furthermore, the present inventor, when incorporating the divided heat generating portion in the heat generating pack of the present invention, the base material and the covering material constituting the heat generating portion of the present invention in one or a plurality of heat generating packs By appropriately selecting the material of the exothermic composition molded body or the compressed body thereof, the shape and arrangement of the segmented heat generating portion, and orienting it to the stiffness of the heat generating pack, the oriented stiffness / softness can be changed. It has been found to increase the structural support of ku. That is, if it is flexible in all directions, the heat generating pack having the fixing means by the adhesive layer is rounded when fixed to the body, and the heat generating pack itself is fixed by the adhesive layer, which makes it difficult to handle. By providing inflexibility in one direction and flexibility in the other direction, the heat generation pack can be accurately fixed to the body, maintaining flexibility while in use, and providing a heat generation pack that is easy to handle, has a good feel and feel. Obtained.

[0065] Further, according to the present invention, by applying the fever pack of the present invention to a body part that is an affected part of a human having pain such as muscle pain using the pack, the sustained skin temperature is reduced to about 32. Maintain a force of about 20 seconds from ° C to about 50 ° C for a period of about 24 hours, preferably maintain the skin temperature from about 32 ° C to about 43 ° C for a period of 1 hour or more to relieve such pain. Further included are methods for treating acute, repetitive, and Z or chronic pain, including painful human skeleton, muscles and Z or the aforementioned pain.

[0066] The first outer wrapping material is preferably a soft flexible material. Materials suitable for the first outer wrapping include, but are not limited to, molded films, woven fabrics, knits and non-woven fabrics, which include carded nonwoven fabrics, spunbonded nonwoven fabrics, air-twisted nonwoven fabrics, heat bonded nonwoven fabrics, Water-twisted nonwoven fabric, melt-swelled nonwoven fabric, and Z or air-penetrating nonwoven fabric. The material composition of the first outer packaging material is cotton, polyester, polyethylene, polypropylene, nylon or the like. A particularly suitable material for the first outer wrapping is a carded heat bonded fabric of hydrophobic polypropylene.

[0067] The second outer wrapping material is a soft and easy-to-smoke, non-irritating skin / wrinkle material.

Suitable materials for the second outer wrapping include, but are not limited to, molded films, woven fabrics, knits and non-woven fabrics, including carded nonwoven fabrics, spunbonded nonwoven fabrics, air-twisted nonwoven fabrics, and heat bonded nonwoven fabrics. , Water-twisted nonwoven fabric, melt-swelled nonwoven fabric, and Z or air-penetrating nonwoven fabric. The material of the second outer packaging material is cotton, polyester, polyethylene, polypropylene, nylon or the like. A particularly suitable material for the second outer wrapping is polypropylene carded heat bonded fabric.

[0068] Further, the bending resistance of the outer packaging material is preferably 100 mm or less, more preferably 60 mm or less, and still more preferably 50 mm or less. The bending resistance of the outer packaging material is preferably maintained at least between 20 ° C and 60 ° C. The bending resistance of the outer packaging material is the type, thickness, degree of stretching, etc. Can be adjusted.

The fixing means is not limited as long as it has a fixing ability capable of fixing a thermal packaging body for a joint peripheral part or a heating part to a required part.

Adhesive layers, key hooks, hook buttons, hook-and-loop fasteners such as berg mouths, magnets, bands, strings, etc., and combinations thereof, which are generally employed as the fixing means, can be arbitrarily used.

In the case of a band, the adjustment fixing means may be further constituted by a combination of a hook-and-loop fastener and an adhesive layer.

Here, the hook-and-loop fastener is known by a trade name such as Velcro (registered trademark), Velcro fastener (registered trademark), Berg mouth fastener, hook-and-loop tape, and the like. It has a fastening function in combination with a hook that is a male fastener that can be fastened with a female fastener. Examples of the loop function include non-woven fabrics, woven fabrics of yarn having fluff and traps, and the like. Even if the core material forming the band is coated with the loop function (female fastener function). It ’s okay, but you can make up the band by itself! The hook member, which is a male fastener member, is not particularly limited, but examples thereof include those formed by a polyolefin resin such as polyethylene and polypropylene, polyamide, polyester and the like. The shape of the hook is not particularly limited, but hooks with a cross-sectional shape of I shape, inverted L shape, shape, so-called mushroom shape, etc. are easily caught on the loop and extremely hard on the skin. This is preferable in that it does not give a sense of irritation. The hook may be adhered to the entire area of the fastening tape, or the tape substrate may be omitted and only the hook may be used as the fastening tape.

The pressure-sensitive adhesive layer includes a water retention agent, a water-absorbing polymer, a pH adjuster, a surfactant, an organic key compound, a hydrophobic polymer compound, a pyroelectric substance, an antioxidant, an aggregate, a fibrous material, a moisturizing agent, Functional substance or mixture of these ingredients Additional component power Contains at least one selected.

The pressure-sensitive adhesives of the present invention are classified into non-hydrophilic pressure-sensitive adhesives, mixed pressure-sensitive adhesives, and hydrophilic pressure-sensitive adhesives (Giel etc.).

As the pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer, the pressure-sensitive adhesive force required to adhere to the skin and clothes As long as it has, there are used various forms such as solvent-based, aqueous-based, emulsion type, hot-melt type, reactive, pressure-sensitive type, non-hydrophilic pressure-sensitive adhesive, and hydrophilic pressure-sensitive adhesive.

The pressure-sensitive adhesive layer includes a non-hydrophilic pressure-sensitive adhesive layer composed of the non-hydrophilic pressure-sensitive adhesive and a non-hydrophilic pressure-sensitive adhesive layer composed of the non-hydrophilic pressure-sensitive adhesive.

The non-hydrophilic pressure-sensitive adhesive layer containing a water-absorbing polymer or a water retention agent is treated as a non-hydrophilic pressure-sensitive adhesive layer.

A hot melt adhesive may be provided between the hydrophilic adhesive layer and the substrate or the covering material.

In addition, there is no restriction when the hydrophilic adhesive is provided on the thermal package for the joint periphery. After the sealing process of the thermal package for the joint periphery, a hydrophilic adhesive layer is provided on the thermal package for the joint periphery. Also good.

Further, the pressure-sensitive adhesive layer may be air permeable or non-air permeable. What is necessary is just to select suitably according to a use. As for air permeability, it is only necessary to have air permeability as a whole. For example, a pressure-sensitive adhesive layer in which a pressure-sensitive adhesive is partially present and a part in which a pressure-sensitive adhesive is not present is present, and the entire region is breathable can be given as an example. When laminating the adhesive on the breathable base material and Z or coating as it is, the method of maintaining the breathability is, for example, by printing the adhesive or transferring the adhesive layer partially. And the non-laminated part is used as a ventilation part, and the adhesive is moved in one direction or zigzag while drawing a circle in the shape of a thread. Examples include a method in which the gap between the thread-like adhesives has air permeability or moisture permeability, a method of foaming the adhesive, or a layer formed by a melt blow method.

Adhesives that make up the non-hydrophilic pressure-sensitive adhesive layer are acrylic pressure-sensitive adhesives, vinyl acetate-based pressure-sensitive adhesives (bulb acetate-based resin emulsion, ethylene-bulb-based resin melt hot melt pressure-sensitive adhesives), polyvinyl alcohol-based pressure-sensitive adhesives, polyvinyl Acetal adhesive, vinyl chloride adhesive, polyamide adhesive, polyethylene adhesive, cellulose adhesive, black mouth prene (neoprene) adhesive, nitrile rubber adhesive, polysulfide adhesive, ptylgo Examples thereof include rubber adhesives, silicone rubber adhesives, styrene adhesives (eg, styrene hot melt adhesives), rubber adhesives, silicone adhesives, and the like. Among these, rubber adhesives, acrylic adhesives or hot melt adhesives are high because of their high adhesive strength, low cost, good long-term stability, and little decrease in adhesive strength even when heated. Adhesives containing molecular substances are desirable.

In addition to the base polymer, the pressure-sensitive adhesive may optionally contain other components such as rosin, coumarone indene resin, hydrogenated petroleum resin, maleic anhydride-modified rosin, rosin derivatives or C5 petroleum oil. Oil tackifiers such as petroleum spheroids represented by alicyclic petroleum resins such as fats, and phenol tackifiers such as terpene phenolic rosins, rosin phenolic rosins, alkylphenolic terrestrial resins (especially -Tackifiers with a phosphorus point of 50 ° C or lower), coconut oil, castor oil, olive oil, camellia oil, liquid paraffin and other softeners, softeners, anti-aging agents, fillers, aggregates, adhesion regulators, Adhesion improvers, colorants, antifoaming agents, thickeners, modifiers and the like may be added as appropriate to improve performance such as improving the adhesion to nylon clothing and blended fabric clothing.

Examples of the hot melt pressure-sensitive adhesive include known hot-melt pressure-sensitive adhesives that have been given tackiness. Specifically, for example, BB, A-type block co-polymers such as SIS, SBS, SEBS, or SIPS can be used. Styrenic adhesives based on polymers, chlorinated adhesives based on salt-bulb resin, polyester adhesives based on polyester, polyamide adhesives based on polyamide , Acrylic adhesives based on acrylic resin based on acrylic resin, polyolefin adhesives based on polyolefins such as polyethylene, ultra-low density polyethylene, polypropylene, ethylene α-olefin, and ethylene acetate butyl copolymer, 1 , 2—Polybutadiene-based polymer 1, 2-polybutadiene adhesive or polyurethane Polyurethane adhesives shall be the base polymer Tan, or adhesion improvement and also stability of these modified products force for changing an adhesive, or a mixture of two or more of these adhesives and the like. Moreover, an adhesive layer composed of a foamed adhesive or an adhesive layer composed of a crosslinked adhesive can also be used.

The non-aromatic hot-melt adhesive is a base polymer that does not contain an aromatic ring. If it is a hot melt adhesive, there is no limitation. Examples of such olefin-based hot melt adhesives include acrylic hot melt adhesives. Non-aromatic polymers that do not contain aromatic rings and are base polymers include polymers such as olefins and gens. One example is an olefin polymer. The olefin-based polymer is a polymer or copolymer of ethylene or α-olefin. Also, other monomers, such as butadiene and isoprene, may be added.

Examples of α-olefin include, but are not limited to, propylene, butene, heptene, hexene, otaten and the like as long as the monomer has a double bond at the terminal.

Aromatic hot melt adhesives are hot melt adhesives whose base polymer contains an aromatic ring, such as styrene hot melt adhesives such as 代表 -Β-Α block copolymers. Is given as an example.

In the A-B-A type block copolymer, the A block is a monovinyl-substituted aromatic compound A such as styrene or methylstyrene, which is an inelastic polymer block, and the B block is a conjugate of conjugated gen such as butane or isoprene. For example, styrene butadiene styrene block copolymer (SBS), styrene isoprene styrene block copolymer (SIS), or their hydrogenated types (SEBS, SIPS), etc. These may be used, or a mixture of these may be used.

A pressure-sensitive adhesive layer in which a water-absorbing polymer is further blended with the non-hydrophilic pressure-sensitive adhesive can be used as a measure for preventing a decrease in pressure-sensitive adhesive force due to an increase in water content of the non-hydrophilic pressure-sensitive adhesive layer.

The hydrophilic pressure-sensitive adhesive that constitutes the hydrophilic pressure-sensitive adhesive layer is not particularly limited as long as it has a hydrophilic polymer or a water-soluble polymer as a main component, has adhesiveness, and is hydrophilic as the pressure-sensitive adhesive.

Examples of the constituents of the hydrophilic pressure-sensitive adhesive include a hydrophilic polymer such as polyacrylic acid, a water-soluble polymer such as sodium polyacrylate and polyvinylpyrrolidone, and a crosslinked aluminum hydroxide-metasilicate metal aluminate metal salt. Agents, softeners such as glycerin and propylene glycol, higher hydrocarbons such as light liquid paraffin polybutene, primary alcohol fatty acid esters such as isopropyl myristate, key compounds containing silicone oil, monoglyceride, etc. Oils of vegetable oils such as fatty acid glycerin esters and olive oil Ingredients, preservatives such as methyl noroxybenzoate and propyl parabenzoate, solubilizers such as N-methyl-2-pyrrolidone, thickeners such as carboxymethylcellulose, polyoxyethylene hydrogenated castor oil sorbitan fatty acid ester Surfactants such as tartaric acid, light carboxylic acid anhydride, water-absorbing polymer, excipients such as kaolin, moisturizers such as D-sorbitol, sodium edetate, paraoxybenzoic acid esters, tartaric acid, etc. Examples include stabilizers, cross-linked water-absorbing polymers, boron compounds such as boric acid, water, and the like. Also, any combination of these forces can be configured.

The temporary sealing part is formed through an adhesive layer, but the adhesive constituting the adhesive layer is a layer formed of a polymer composition having tack at normal temperature, and it is limited if heat sealing can be performed after temporary attachment. Not sure.

Moreover, the adhesive of the said adhesive layer can be used for the adhesive which comprises the adhesive layer used for temporary attachment. A non-hydrophilic adhesive is preferred. The adhesive constituting the adhesive layer preferably has a melting point of the base polymer of the adhesive that has good compatibility with the heat seal material constituting the heat seal, and is lower than the melting point of the heat seal material. In particular, a hot-melt adhesive is preferable for the hot-melt adhesive. When the heat seal material is an olefin-based material, an olefin-based pressure-sensitive adhesive is preferred as an example of the pressure-sensitive adhesive.

The adhesive layer for fixing the air flow adjusting material is composed of a commonly used adhesive or pressure-sensitive adhesive. In particular, the pressure-sensitive adhesive is useful, and the pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer can be used. In addition, the method of providing the adhesive layer may be provided on the entire surface as long as the air flow adjusting material can be fixed, or may be provided partially or intermittently. Various shapes such as a net shape, a stripe shape, a dot shape, and a belt shape are listed as examples.

In addition, when the adhesive layer is a hydrophilic adhesive layer, if there is a difference in water retention between the hydrophilic adhesive layer and the exothermic composition, a packaging material such as a base material between them Moisture movement takes place via both, and inconvenience occurs for both. This happens especially during storage. In order to prevent this, the packaging material interposed between them preferably has a moisture permeability of at least 2 g / m ² / day in terms of moisture permeability according to the Lissy method (Lyssy method). By using this, when the heating element is stored and stored in an outer bag which is a non-breathable storage bag, moisture movement can be prevented. When a hydrophilic pressure-sensitive adhesive layer is used for the pressure-sensitive adhesive layer, the moisture permeability of the moisture-proof packaging material provided between the exothermic composition molded body and the hydrophilic pressure-sensitive adhesive layer is within the range that does not affect the heat generation performance. is not limited as long prevent minute movement, in moisture permeability by Ritsushi one method (Lyssy method), usually, it is 2gZm ² Zday less, preferably not more than 1. 0gZm ² Zday, more preferably 0. 5GZm ² Zday or less, and more preferably 0.01 to 0.5 gZm ² Zday. Here, the values are under the conditions of 40 ° C and 90% RH under atmospheric pressure. The moisture-proof packaging material can be used as a base material or a coating material, or can be laminated alone on a base material or a coating material. The moisture-proof packaging material is not limited as long as moisture transfer between the exothermic composition molded body and the hydrophilic pressure-sensitive adhesive layer can be prevented. However, the metal vapor-deposited film, the metal oxide vapor-deposited film, the metal foil laminated film, the EVOH (Ethylene butyl alcohol copolymer, ethylene butyl acetate copolymer) film, biaxially stretched polybutyl alcohol film, polyvinylidene chloride coated film, polysalt vinylidene based on polypropylene, etc. Non-breathable packaging material, flexible plastic made by vacuum deposition or sputtering of metal such as aluminum foil on a polyester film base film, metal foil such as aluminum foil, and polyester film substrate Laminate for packaging using a transparent barrier film with a structure in which silicon oxide and aluminum oxide are provided on the base material One example. A non-breathable packaging material used for the outer bag or the like can also be used.

In addition, a packaging material such as a moisture-proof packaging material disclosed in Japanese Patent Application Laid-Open No. 2002-200108 can also be used, and the contents of this description are incorporated in the present invention.

When using a water-containing hydrophilic pressure sensitive adhesive (such as Giel) in the pressure sensitive adhesive layer, a reaction accelerator such as sodium chloride in the heat generating composition is used to adjust the water balance between the heat generating composition and the pressure sensitive adhesive layer. And the water-absorbing polymer, etc., in the range of 10 to 40% by weight, preferably 15 to 40% by weight, more preferably 15 to 30% by weight of the exothermic composition. You can adjust the weight percentage range!

Further, as a pressure-sensitive adhesive having good moisture permeability and low irritation to the skin, a water-containing pressure-sensitive adhesive (hydrophilic pressure-sensitive adhesive, Jewel) such as JP-A-10-265373 and JP-A-987173 can be used. JP-A-10-279466 and JP-A-10-182408 disclose hot-melt-coated adhesives described in JP-A-6-145050 and JP-A-6-199660. The rubber-based pressure-sensitive adhesives listed are also useful, and are cited in the present specification by quoting the documents.

The functional substance to be included in the pressure-sensitive adhesive layer is not limited as long as it is a substance having a function, but it is a fragrance compound, a plant extract, a herbal medicine, a fragrance, a slimming agent, an analgesic, a blood circulation promoter, a swelling improving agent, Antibacterial agent, bactericidal agent, fungicide, deodorant, deodorant, transdermal drug, fat decomposition component, negative ion generator, far-infrared radiator, magnetic substance, poultice, cosmetics, bamboo vinegar Alternatively, at least one selected from wood vinegar and the like can be cited as an example.

Specifically, aromatic compounds such as menthol and benzaldehyde, plant extracts such as mugwort extract, herbal medicines such as mogusa, fragrances such as lavender and rosemary, slimming agents such as aminophylline and tea eks, indomethacin, dl— Analgesics such as camphor, blood circulation promoters such as acidic mucopolysaccharides, force mitre, swelling improvement agents such as citrus tincture and flavone derivatives, poultices such as boric acid water, physiological saline, alcohol water, Lipolytic components such as caffeine and tonaline, aloe extract, vitamins, hormones, antihistamines, cosmetics such as amino acids, carboxylic acid derivatives, boric acid, iodine agents, reverse sarcolic acid, salicylic acid substances, iow Examples include antibacterial agents such as antibiotics, bactericides, and fungicides.

The percutaneously absorbable drug is not particularly limited as long as it is percutaneously absorbable, but corticosteroids, anti-inflammatory analgesics, hypertensives, anesthetics, hypnotic sedatives, and psycholeptics. Antibacterial substances, antifungal substances, skin irritants, anti-inflammatory agents, antiepileptics, analgesics, antipyretics, anesthetics, bactericides, antimicrobial antibiotics, vitamins, antiviral agents, swelling improvers, diuresis Agents, antihypertensive agents, coronary vasodilators, antitussive expectorants, slimming agents, antihistamines, arrhythmic agents, cardiotonic agents, corticosteroids, blood circulation promoters, local anesthetics, fat decomposition components, etc. Examples include, but are not limited to, mixtures. These drugs can be used alone or in combination as needed.

The content of the functional substance is not particularly limited as long as the medicinal effect can be expected. However, the content of the functional substance is not limited from the viewpoint of pharmacological effect, economic efficiency, adhesive strength, and the like. Preferably it is 0.01-25 weight part with respect to 100 weight part of adhesives, More preferably, it is 0.5-15 weight part. The method for providing the adhesive layer may be provided on the entire surface as long as the thermal package for the joint periphery can be fixed, or may be provided partially or intermittently. Various shapes such as a net shape, a stripe shape, a dot shape, and a belt shape can be given as examples.

[0070] The heat generating pack is folded with the second surface inside the fold and the outer surface exposed to the inside of the package, and enclosed in an outer bag which is a non-breathable storage bag. The exothermic pack is removed from the outer bag, and oxygen reacts with the exothermic composition molded body to generate heat. This heat generating pack is compact and portable.

[0071] By disposing the attachment means as a breathable layer on the same surface, the heat generating pack of the present invention is worn inside the user's clothes and is in direct contact with the user's body.

[0072] Prior to use, the heat generating pack is sealed in an outer bag, which is an oxygen-impermeable storage bag, for storage, transportation, and the like. If the outer bag is non-breathable, other restrictions may be applied. For example, metal oxides such as OPP, CPP, polyvinylidene chloride, aluminum oxide and silicon oxide ( (Including semiconductors), which are moisture-proof nylon, polyester, polypropylene film, aluminum box or aluminum-deposited plastic film. An example is a heat-generating pack in which the manufactured heat-generating pack is sealed between two non-breathable films or sheets.

[0073] The exothermic composition in the present invention is formed by a mold forming method such as a die-through molding method or a swallow molding method. Depending on the type, the maximum width of the segmented heat generating part is 1 to 20 mm, and the maximum diameter is 1 to 20 mm (the one with two or more diameters such as an ellipse is the shortest such as the shortest! The maximum height is 0.1 to 20 mm, the interval between the segment heat generating parts is adjusted to 1 to 20 mm, and the base material and the covering material have a heat seal layer, and at least one of them An adhesive layer made of an adhesive is provided on the heat seal layer, and the base material, the exothermic composition molded body, and the coating material are at least the periphery of the exothermic composition molded body. Then, after temporarily attaching and forming a temporary sealing part, the temporary sealing part is heat sealed to form a heat sealing part. Further, heat sealing is performed to be narrower than the width of the temporary sealing portion, and then heat sealing is performed in the temporary sealing portion, and then the region is opened by moving the exothermic composition. As a result, the exothermic composition molded body is stabilized and a full-scale heat seal is used. It is easy to seal, eliminates seal misalignment, etc., can be realized at high speed with a narrow heat seal width, and generates heat without deteriorating heat generation characteristics such as reduced heat generation time due to heat generation section classification. Division of parts is possible. The outer packaging material is provided in the heat generating pack to manufacture the heat generating pack, but the opening may be performed at the time of manufacturing the heat generating pack or after manufacturing.

[0074] The mold-through molding method uses a punching die, and forms a punching-shaped exothermic composition molded body on a long base material, and covers the molding machine with a long covering material. Using a rotary sealer that can seal the surrounding area of the section and the base material and the coating material (heat seal, pressure seal, thermocompression seal, etc.), the exothermic composition molded body is passed through the seal device. For example, a continuous forming method that heat seals and seals the necessary parts of the peripheral part and the section.

[0075] The squeeze molding method is a molding method in which a heat-generating composition molded body is laminated on a long base material by filling a squeeze mold having a recess and transferring it to the base material. In the case of the continuous type, by filling the concave portion with the drum-shaped rotating body and transferring it to the base material, the molding machine for laminating the exothermic composition compact on the long base material and the long covering material are covered, Using a rotary sealer that can seal the target section and the periphery of the base material and the covering material (heat seal, pressure seal, thermocompression seal, etc.), and the exothermic composition molded body through the seal device This is a continuous forming method in which the necessary portions of the edge and the section of the material are heat sealed and sealed.

[0076] In addition, a magnet may be used for molding the exothermic composition of the present invention. When the magnet is used, the exothermic composition can be easily accommodated in the mold and the molded body can be detached from the mold, and the exothermic composition molded body can be more easily molded.

[0077] A heat generating pack may be manufactured by providing a breathable pressure-sensitive adhesive layer between at least the heat generating composition molded body and the covering material. In the case where a breathable pressure-sensitive adhesive layer is provided at least between the exothermic composition molded body and the covering material, there is no limitation as long as a breathable pressure-sensitive adhesive layer exists at least between the exothermic composition molded body and the covering material. Absent. For example, it may be provided on the surface of the covering material facing the exothermic composition molded body, and a breathable pressure-sensitive adhesive layer is provided on the exothermic composition molded body or the laminated exothermic composition molded body and the substrate, An example is temporary attachment by pressing between the covering material and the exothermic composition molded body and Z or the substrate.

[0078] Further, an adhesive layer is formed between the base material and the exothermic composition molded body laminated on the base material and the covering material. Thus, a high-speed manufacturing method of a heat generating pack in which the peripheral portion of the exothermic composition molded body and the peripheral portion of the heat generating pack are heat sealed can be realized.

[0079] In the present invention, the heat seal material constituting the heat seal layer is not limited as long as at least a part of the heat seal material can be bonded by heating even if it is a single material or a composite material having a heat seal layer. Absent. For example, ethylene olefin copolymer resins such as polyethylene and polypropylene, ethylene vinyl acetate copolymer resins, ethylene-isobutyl acrylate copolymer resins, and other ethylene acrylic acid ester copolymers Melt resin, polyamide hot melt resin, petitanolet hot melt resin, polyester hot melt resin, polyamide hot melt resin, polyester hot melt resin, polymethylmetatalate hot melt resin Examples include hot melt resin such as polyvinyl ether hot melt resin, polyurethane hot melt resin, polycarbonate hot melt resin, vinyl acetate, vinyl chloride vinyl acetate copolymer, and films and sheets thereof. Can be mentioned. Moreover, what mixed additives, such as various acid prevention agents, can also be used for hot-melt type | system | group resin and its film and sheet | seat. In particular, low density polyethylene and polyethylene using a meta-octane catalyst are useful.

[0080] In the present invention, the temporary attachment means that at least the base material and the covering material are covered with an adhesive layer that also has an adhesive force when the exothermic composition molded body is sandwiched between the base material and the covering material. This refers to weak pressure-sensitive adhesion or adhesion for holding the exothermic composition molded product stored until the material is adhered and heat sealed.

Further, the term “opening” refers to releasing temporary attachment by moving the heat-generating composition in the non-heat-sealed portion region to the region in the temporary-sealed portion after heat sealing.

In addition, as the pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer used for temporary attachment, the pressure-sensitive adhesive of the pressure-sensitive adhesive layer can be used, but a non-hydrophilic pressure-sensitive adhesive is preferable. The pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer has good compatibility with the heat seal material constituting the heat seal, and the base polymer of the pressure-sensitive adhesive that is preferred is preferably not more than the melting point of the heat seal material. Especially hot-melt adhesive Is preferred. Also, if the heat seal material is an olefin-based material,

An olefin-based pressure-sensitive adhesive is preferred, and can be mentioned as an example.

It should be noted that the method of providing the adhesive layer for temporary attachment may be provided on the entire surface, or may be provided partially or intermittently. Various shapes such as a net shape, a stripe shape, a dot shape, and a belt shape are listed as examples.

Further, the present invention provides for the muscle, skeleton, and Z or mentioned body of a human suffering from such pain, typically by applying heat to specific areas of the human body suffering from such pain. Includes methods for treating acute, repetitive, and Z or chronic body, knee pain, including pain. The method preferably applies about 20 seconds to about 24 hours, preferably about 20 minutes to about 20 hours, on the troubled part of a person suffering from such pain, preferably the abdomen or the physiology, with the above-described fever pack. More preferably, about 4 hours of force is also applied for about 16 hours, most preferably about 8 hours to about 12 hours, so that the skin temperature is reduced to about 32 ° C force for human knees suffering from such pain. ° C, preferably about 32 ° C to about 45 ° C, more preferably about 32 ° C to about 42 ° C, most preferably about 32 ° C force or about 39 ° C, and most preferably about 32 ° C force Have a method of maintaining at about 37 ° C, in which case the highest skin is achieved so that the desired therapeutic effect is achieved without any problems such as skin burns that may be caused by using high temperatures for extended periods of time. Of time to maintain the temperature and skin temperature at the maximum skin temperature The length can be appropriately selected by a person in need of such treatment. Preferably, the method produces a sustained skin temperature for a human body having acute, repetitive and Z or chronic body pain, including muscle, skeleton and Z or body pain mentioned. About 32 ° C to about 43 ° C, preferably about 32 ° C to about 42 ° C, more preferably about 32 ° C force is also about 41 ° C, most preferably about 32 ° C to about 39 ° C, and most Preferably from about 32 ° C to about 37 ° C for a period of about 1 hour or longer, preferably about 4 hours or longer, more preferably about 8 hours or longer, more preferably about 16 hours or longer, most preferably about 24 hours. Maintaining time, acute, repetitive, and Z or chronic body pain including human pain such as human skeleton, muscle and Z or body pain such as abdominal pain and Z or menstrual pain mentioned Body part forces that are considerably mitigated and anxious to the user, at least after the heat source is removed About 2 hours, preferably at least about 8 hours, more preferably at least about 16 Including a method of prolonging such pain relief considerably over time, most preferably at least about 1 day, and most preferably at least about 3 days.

The mobile water value is a value indicating the amount of surplus moisture that can move out of the exothermic composition in the moisture present in the exothermic composition. This easy water value will be explained with reference to Figs. As shown in Fig. 12, N O. 2 (JIS P 3801 type 2) filter paper 25 in which eight lines are written radially from the central point at 45 degree intervals, as shown in Figs. Place on the stainless steel plate 29, and place the template plate 26 with a length of 150mm x width 100mm with a hollow cylindrical hole 27 of inner diameter 20mm x height 8mm at the center of the filter paper 25, and near the hollow cylindrical hole 27 Place the sample 28 on the plate, move the push plate 22 along the die plate 26, put the sample 28 into the hollow cylindrical hole 27 while pushing it in, and scrape the sample along the die plate 26 surface. (Molding) o Next, as shown in Fig. 15, a non-water-absorbing 70 m polyethylene vinylol 24 is placed so as to cover the hole 27, and further, a stainless steel 5 mm thick x 150 mm wide x 150 mm wide. Place plate 23 and hold for 5 minutes, avoiding exothermic reaction. Then, as shown in Fig. 16, take out the filter paper 25, and follow the leaching path of water or aqueous solution along the radial line from the circumference 31 that is the edge of the hole of the hollow cylinder to the leaching tip. Read in mm as distance 30. Similarly, the distance 30 is read from each line, and a total of 8 values are obtained. Each of the 8 values (a, b, c, d, e, f, g, h) read is taken as the measured moisture value. The arithmetic average of the eight measured moisture values is taken as the moisture value (mm) of the sample. In addition, the water content for measuring the true water value is the blended water content of the exothermic composition or the like corresponding to the weight of the exothermic composition or the like having an inner diameter of 20 mm and a height of 8 mm. Measure only in the same manner, and calculate the same value as the true moisture value (mm). The value obtained by dividing the moisture value by the true moisture value and multiplying it by 100 is the mobile water value. That is,

Easy water value = [moisture value (mm) Z true water value (mm)] X 100

For the same sample, measure five points, average the five mobile water values, and use the average value as the mobile water value of the sample. In addition, when measuring the mobile water value of the exothermic composition in the exothermic pack, the moisture content for measuring the true moisture value is calculated by measuring the moisture content of the exothermic composition with an infrared moisture meter. Based on this, the amount of water necessary for the measurement is calculated, and the true water value is measured and calculated from the amount of water. In the present invention, the exothermic composition molded body obtained by molding an exothermic composition having an excess water amount of 0.01 to 20 is laminated on a substrate and covered with a covering material, and at least the exothermic composition molded body is formed. A heat generating pack can be obtained simply by sealing the peripheral edge. It is not necessary to add moisture after the substrate is stored in a packaging material such as a coating material. Therefore, the process is remarkably simplified, and there is an advantage in cost.

The mobile water value (0 to: LOO) in the present invention is 0.01 to 20, more preferably 0.01 to 18, more preferably 0.1 to 15, [Preferably ί or 0.001 to 13, more preferably 1 to 13, and further preferably 3 to 13.

The exothermic pack using the exothermic composition molded body obtained by molding a moldable exothermic composition using the surplus water of the present invention as a linking substance, the exothermic composition comprises an agglomeration aid, a dry binder, an agglomerated glaze agent. The appropriate amount of surplus water represented by the mobile water value of 0.01 to 20 is used as the linking substance.

When the surplus water in the exothermic composition becomes an appropriate amount, the hydrophilic group in the composition component is hydrated by dipolar interaction or hydrogen bond, and also has a high structural property around the hydrophobic group. Is presumed to exist. As a result, it becomes sand sando state, and it is estimated that moldability of the exothermic composition occurs. This is connected water, which is a connected substance in some way. In addition to this, there is also water in a state that can be called free water, and if excess water increases, the structure will soften and free water will increase. The controlling factors that cause iron powder to oxidize are the amount of water present and the amount of oxygen supplied to the iron powder surface. The adsorbed water film (less than 100mm) is said to have a low rate of acidity with sufficient moisture. When the adsorbed film is about 1 m, the water content is sufficient. In addition, since the water film is thin, it is easy to supply oxygen to the iron powder surface, and the oxidation rate is high. If the membrane becomes thicker and the adsorbed membrane exceeds: m, it is estimated that the oxygen supply will decrease. Obtained the knowledge that the mobile water value representing the optimal water content indicating a moldability and oxidation rate above a certain level was 0.01 to 20, and completed the present invention.In other words, by using an appropriate amount of surplus water, The component particles are held together by the surface tension of moisture, causing moldability in the exothermic composition, and the moisture does not substantially function as a barrier layer. Therefore, the exothermic composition generates heat upon contact with air. Furthermore, the exothermic composition using active iron powder is active. By using the heat-generating composition, the heat-generating property is remarkably excellent and the heat-generating composition has high moldability. In addition, the water in the exothermic composition molded body produced by the molding lamination method generates heat without moving the packaging material to the water absorbent sheet. Furthermore, by providing a plurality of segmented heat generating parts in which the heat generating composition molded body is divided by the seal part, the heat generating pack itself has flexibility and can be applied to places where flexibility is required such as various parts of the human body or objects having curved surfaces. It is possible to provide a heat generation pack that is excellent in wearing and excellent in feeling of use.

In the base material, the covering material, and the exothermic composition molded body, at least the covering material and the exothermic composition molded body are temporarily attached via an adhesive layer, and then the peripheral portion of the exothermic composition molded body and the exothermic pack. By heat-sealing the peripheral portion, the reliability of heat-sealing is improved, so that it is possible to reduce the heat-sealing width and the high-speed manufacturing of the heat-generating pack.

The moldability of the present invention means that a molded product of the heat generating composition can be formed in the shape of a punched hole or a concave mold by mold-through molding using a punched mold having a punched hole or by squeeze molding using a concave mold. This shows that the molded shape of the exothermic composition molded body is maintained after molding including separation. If there is moldability, the heat-generating composition molded body is covered with at least the covering material, and the shape is maintained until the seal portion is formed between the base material and the covering material. It is possible to seal with no breakage of the seal because there is no scattered sesame seeds in the seal part. The presence of sesame causes poor sealing.

1) As a measuring device,

Can be fixed to a stainless steel mold on the upper side of an endless belt that can run (a plate with a thickness of 2mm x length 200mm x width 200mm with four holes 60mm long x 40mm wide with R5 treated in the center) Place an appropriate scraper and a magnet (12.5 mm thick x 24 mm long x 24 mm wide in parallel) on the underside of the endless belt on the opposite side. The magnet covers an area that is larger than the area (40 mm) of the maximum cross section with respect to the direction of travel of the punching hole of the mold, and the area in the vicinity thereof.

2) As a measurement method,

A stainless steel plate with a thickness of lmm x length 200mm x width 200mm is placed on the endless belt of the measuring device, and a polyethylene plate with a thickness of 70 ^ m x length 200mm x width 200mm is placed on the stainless steel plate. Place the stainless steel mold. Then, after fixing the scraping plate at a position 50 mm from the end of the endless belt of the endless belt of the mold, the exothermic composition 50 g is placed near the scraping plate between the scraping plate and the punching hole to endlessly. The shaped belt is moved at 1.8 mZmin, and the exothermic composition is scraped off and filled into the punched hole of the mold. After the mold has completely passed the frayed plate, the endless belt stops running. Next, the mold is removed and the exothermic composition molded body laminated on the polyethylene film is observed.

3) As a judgment method,

Five pieces of the exothermic composition molded body having a maximum length of 300 to 800 m joined by the pieces of the exothermic composition molded body having a maximum length exceeding 800 m at the peripheral edge of the exothermic composition molded body. The exothermic composition is moldable.

This is an essential property for the exothermic composition used in the molding method. It is impossible to manufacture heat-generating packs by the molding method.

In the present invention, the term “substantially planar” means a flat surface having no storage recesses, such as storage pockets, storage sections, and storage areas, which are provided in advance for storing the exothermic composition. Accordingly, irregularities that do not intentionally contain the exothermic composition may exist.

The pocket of the present invention is a storage pocket previously provided in the packaging material for storing the exothermic composition, and is a pocket as described in JP-A-2001-507593. Since the unevenness that is not intended for storing the intentionally generated heat and molded product is not a pocket, even if such unevenness is present in the base material, it should be a substantially planar base material.

The storage compartment is a storage compartment provided in advance for the packaging material in order to store the exothermic composition. The storage compartment is described in Japanese Patent No. 316160, Japanese Patent Publication No. 11-508314, V, etc. Storage compartment. It is not intended for storage of the intentionally exothermic composition molded body! Since the unevenness is not the storage compartment, even if such unevenness is present in the base material, the storage area is a substantially flat base material. This is a storage area for storage provided in advance in the packaging material for storing the exothermic composition, and is a storage area described in Japanese Patent No. 316160 and Japanese National Publication No. 11 508314. It is not intended for storing the exothermic composition molded body! Since the unevenness is not a storage area, even if such unevenness is present in the base material, it should be a substantially flat base material. [0086] The bending resistance in the present invention refers to rigidity (constriction, stiffness) or flexibility, according to the JIS-L-1096 A method (45 ° cantilever method), except that the exothermic pack itself is used as a sample. Follows the law. That is, place one side of the heat generation pack on the base line of the scale on a smooth horizontal surface with a 45-degree slope at one end. Next, gently slide the heat generating pack in the direction of the slope using an appropriate method, and read the position of the other end on the scale when the center point of one end of the heat generating pack touches the slope A. The bending resistance is indicated by the length (mm) that the heat generating pack has moved. Each of the five heat generating packs is measured, and the average value in the vertical direction and the horizontal direction, or in one direction and the direction perpendicular thereto, in each direction. Represents the bending resistance (up to whole numbers). However, when measuring with the pressure-sensitive adhesive side of the heat-generating pack with a pressure-sensitive adhesive layer facing the horizontal platen side, the pressure-sensitive adhesive side with a separator should be opposed to the horizontal platen side. In any case, the measured value on the side where the minimum bending resistance is measured is adopted.

Also,

1) The heat generating part of the heat generation pack and the product containing the heat generation pack should be at least 5mm wide and 20mm long. However, the length should cross the region where the exothermic composition exists, or the region where the exothermic composition exists and exist, and cross the region linearly.

2) In the case of an exothermic pack with an adhesive layer, as a separator for the adhesive layer, a plastic film with a bending resistance of 30 mm or less, or a thickness of 50 μm or less, preferably 25 μm or less, with no waist or lightly Use a soft, soft film, such as a plastic film that can be wrinkled, and follow the adhesive layer. In addition, make a specimen of 100mm X 200mm for the softness of the base material and Z or coating material, and adopt the bending resistance in the 200mm direction. In the present invention, the bending resistance in at least one direction is usually 100 mm or less, preferably 8 Omm or less, more preferably 50 mm or less, further preferably 30 mm or less, and further preferably 20 mm or less. .

[0087] The bending resistance ratio of the heat generating pack or the heat generating portion in the present invention is a bending resistance ratio with respect to the entire length of the heat generating pack or the heat generating portion in one direction, and is calculated by the following equation. Flexural modulus = (A / B) X 100

A: Bending softness of heat generating pack or heat generating part in direction

B: Total length of the heat generating pack or heat generating part in the one direction

In the present invention, the flexural modulus in at least one direction is usually 50 or less, preferably 40 or less, more preferably 30 or less.

[0088] The bending resistance ratio in the present invention means that the bending resistance in one direction and the bending resistance in the direction orthogonal to the one in the surface orthogonal to the thickness direction of the heat generating pack or the heat generating portion are small. It is the ratio to. The bending resistance ratio is preferably 2 or more.

[0089] In the case of the heat generating pack having segmented heat generating portions provided in the form of streaks in the present invention, the absolute value of the difference in the bending resistance in the two directions that are perpendicular to each other is maximized. A heat generation pack in which the face-shaped segmented heat generating portions are provided at intervals in stripes, a heat generation pack in which an adhesive layer is further provided, and a heat generation pack in which the adhesive layers are provided at intervals in a stripe shape Since it is very flexible in one direction and rigid in one direction, it has the effect of relieving symptoms such as stiff shoulders, low back pain, and muscle fatigue, and particularly relieving symptoms of menstrual pain. In addition, it can be made almost in the width direction in the width direction of the heat generating pack, making it compact and convenient for storage. In the case of a separator, it can be made by using a low-rigidity low-strength separator.

In addition, when a fever pack is provided along the body, the body, shoulders, legs, abdomen, hips, arms, etc. with many secondary curved surfaces are almost linear in one direction, and the other two directions are Almost curved force is also created. Therefore, one direction is almost linear, and the other two directions can create curved surfaces. The heat generating pack of the present invention can form a two-dimensional curved surface, so that it can fit along the body and warm the body. Ideal for alleviation and treatment of various symptoms.

In addition, the heat generating pack of the present invention can provide a heat generating portion that is flexible and exhibits a uniform temperature distribution or a heat generating portion that exhibits a pattern temperature distribution by adjusting the size and interval of the convex section heat generating portions. The pot effect of the heating part can be improved by the pattern temperature distribution.

In a heat generating pack having a divided heat generating portion, the minimum bending resistance of the surface perpendicular to the thickness direction is preferably 50 mm or less, more preferably 40 mm or less, and even more preferably 30 mm or less. More preferably, it is 5-30 mm. This bending resistance and bending resistance ratio is maintained at least between 20 and 60 ° C.

[0090] The water retention rate is measured and calculated by the following method. About 1 lg of sample fiber that has been cut to a length of about 5 cm and opened well is soaked in pure water. After 20 minutes (20 ° C), the fiber between the fibers is rotated at 2000 rpm using a centrifugal dehydrator. Remove water. Measure the weight (W1) of the sample prepared in this way. Next, the sample is dried to a constant weight in a vacuum dryer at 80 ° C., and the weight (W2) is measured. Calculate the water retention rate using the following formula.

Water retention rate (%) = [(Wl -W2) / W2] X 100

In the present invention, a water retention rate of 20% or more is preferred.

Hereinafter, examples of the heat generating pack will be described with reference to the drawings.

Brief Description of Drawings

[0092] FIG. 1 is a plan view of an embodiment of the heat generating pack of the present invention.

[Figure 2] Cross section of Z-Z

[Fig. 3] (a) to (f) Schematic diagram of one process for manufacturing the heat generating pack and the heat generating pack of the present invention. [Fig. 4] (a) to (f) One of the manufacturing of the heat generating pack and the heat generating pack of the present invention. FIG. 5 is a perspective view of another embodiment of the heat generating pack of the present invention.

[Fig.6] Cross section of Y-Y

FIG. 7 is a sectional view of another embodiment of the heat generating pack according to the present invention.

FIG. 8 is a plan view of another embodiment of the heat generating pack according to the present invention.

[Fig.9] Cross section of X-X

[Fig. 10] Schematic diagram showing panties and fever pack with crotch and full panel

[Fig. 11] Cross-sectional view showing a heat generating pack folded in half and enclosed in an outer bag

[Fig. 12] Plan view of the filter paper for measuring the water mobility value of the present invention.

FIG. 13 is a perspective view for explaining easy water measurement of the present invention.

FIG. 14 is a cross-sectional view for explaining easy water value measurement according to the present invention.

FIG. 15 is a cross-sectional view for explaining easy water measurement according to the present invention.

[Fig. 16] Plan view of filter paper after measurement of mobile water value of the present invention.

Explanation of symbols

[0093] 1 Fever pack Exothermic composition molded body

Heating section

Division

Oxygen permeation means

Base material

Non-woven

1st adhesive layer 9 2nd adhesive layer

First outer packaging

Second outer packaging

Mounting means

Adhesive layer

Separator

Top edge

Bottom

First side

Second side

Panty

Crotch

Front panel

Outer bag (oxygen-impermeable storage bag)

Pushing plate

Flat plate

Non-water absorbent film (polyethylene film, etc.)

Filter paper with 8 lines drawn at 45 ° intervals radially from the center point Template with hollow cylindrical holes

hole

Sample

Stainless plate 30 Distance to tip of water or solution

31 Hollow cylindrical hole equivalent position on filter paper

Example

FIG. 1 is a plan view of an embodiment of a heat generating pack having a breathable surface according to the present invention.

Fig. 2 is a cross-sectional view taken along the line Z-Z in Fig. 1 and shows the laminated structure of the heat generating pack. Fig. 3 shows the manufacturing process of a segmented heat generating part using a part of the enlarged part of the heat generating pack.

Fig. 4 shows the manufacturing process of another segmented heat generating part using a part of the heat generating pack.

FIG. 5 is a perspective view of another heat generating pack of the present invention. A mold that includes a partially random area on the air permeable surface of the heat generating section of the heat generating pack and is provided with a cobweb-like adhesive layer as a whole.

FIG. 6 is a cross-sectional view taken along the line Y-Y in FIG. 5 and shows a laminated structure of the heat generating pack, the adhesive layer, and the protective separator for the adhesive layer.

FIG. 7 shows an embodiment where the base of the heat generating pack is breathable.

FIG. 8 is a plan view of an embodiment of a heat generating pack having an adhesive and air-permeable surface according to the present invention, showing the shape of the divided heat generating portion and the stripes of the fixing adhesive layer provided in the divided portion.

FIG. 9 is a cross-sectional view taken along the line XX in FIG. 8 and shows a laminated structure of the heat generating pack, the pressure-sensitive adhesive layer, and the protective separator for the pressure-sensitive adhesive layer.

Figure 10 is a plan view of a woman's panties viewed from the waist, showing the fever pack placed on the front of the panty so that when the panty is worn, the fever pack transfers heat to the user's abdomen. ing.

FIG. 11 is a cross-sectional view of the heat generating pack of FIG. 1, showing the heat knock knocked up in the non-breathable packaging.

As shown in FIGS. 1 and 2, the heat generating pack 1 has a plurality of divided heat generating portions 3. The section heating section 3 is formed by laminating the exothermic composition molded body 2 molded on the flat base material 6 and further covering the covering material 7, and then the outer peripheral portion of the exothermic composition molded body 2 is covered. It is formed by heat sealing. There is virtually no difference between the base material 6 and the coating material 7.First, the exothermic composition molded body 2 is laminated. The base material 6 is used. The air permeability may be at least one of the base material 6 and the covering material 7, but the base material 6 is normally non-breathable and the covering material 7 has air permeability.

[0096] The plurality of divided heat generating portions 3 are separated from each other and exist independently. The exothermic composition molded body 2 is densely stored in each of the divided heat generating portions 3. Since there is a section 4 between adjacent exothermic composition molded bodies 2, it is possible to follow the contour of the body more than the exothermic pack 1 having a large exothermic part. The exothermic composition molded body 2 may be compressed and exist in the section heat generating portion 3. The section heating section 3 does not bend easily, but can be bent at the section. Each of the divided heat generating portions 3 preferably has substantially the same amount of the heat generating composition molded body 2 and air permeability.

FIG. 3 shows an example of the production process. FIG. 3 (a) shows a non-breathable base material 6 and FIG. 3 (b) shows a product obtained by laminating a moldable composition molded body 2 ( (c) is covered with a breathable covering material 7 perforated (5), and (d) is heat-sealed on the outer periphery of the exothermic composition molded body 2, and the divided heat generating part 3 and the divided part 4 are attached. The heat generating pack to be formed.

In FIG. 3 (e), a breathable covering material 7 is provided with a breathable first outer packaging material 10 via a breathable first adhesive layer 8, and a non-breathable substrate 6 is provided with a second breathable covering material 7. FIG. 2 is a partially enlarged view of a heat generating pack 1 provided with a second outer packaging material 11 via an adhesive layer 9. FIG. 3 (f) is a partially enlarged view of the heat generating pack 1 in which the separator 13 is provided on the breathable first outer packaging material 10 via the breathable adhesive material layer 12A.

[0098] FIGS. 4 (a) to 4 (d) are other examples of the manufacturing process, in which a base material 6 having air permeability is prepared by perforating 5 in advance, and a non-breathable material is used for the covering material 7. This is an example of producing the heat generating pack 1 in the same manner as in FIG. 3 except that it is used.

In FIG. 4 (e), a first outer packaging material 10 is provided on a non-breathable covering material 7 via a first adhesive layer 8, and a breathable second adhesive layer 9 is provided on the breathable substrate 6. Fig. 4 shows a partially enlarged view of the heat generating pack 1 provided with the air permeable second outer packaging material 11. FIG. 4 (f) is a partially enlarged view of the heat generating pack 1 in which the separator 13 is provided on the air permeable first outer packaging material 10 via the air permeable adhesive material layer 12A.

[0099] The material of the base material 6 or the covering material 7 includes those using a meta-octane catalyst that is not limited as long as a thermoplastic resin film is an essential component, such as polyethylene, polypropylene, Polyester films, styrene block copolymers, non-woven fabrics coated with films, permeable membranes, and the like can be used. In this embodiment, a low density polyethylene film having a thickness of 0.001 inch (0.025 mm) is used for the substrate 6. When the ventilation portion 5 is provided on the base material 6 or the covering material 7, preferably a plurality of openings are provided. Specifically, the opening 5 is provided by piercing the base material 6 and Z or the covering material 7 with a heated needle to open a hole. The size of the opening 5 is preferably about 0.1 mm in diameter and up to about 0.08 mm in force, and the number of openings 5 is preferably 20 to 60 per section heating part. Other methods for creating the opening may include a method of puncturing with a cold needle, a vacuum generation method or a high-pressure water jet generation method. Further, it may be made of a microporous membrane or a semipermeable membrane by combining with a porous carrier material. The air permeability is the moisture permeability by the Lissy method (Lyssy method), usually 50 ~: LO, 000gZm ² Z24hr.

[0100] In the case shown in FIG. 5, the heat generating pack 1 described above is accommodated in an outer packaging material. FIG. 6 shows a cross-sectional view of FIG.

5 and 6, the cobweb-like adhesive layer 12 provided by the melt blow method, the curtain spray method, or the like is provided. Adhesive is applied to the first outer packaging material 10 so that the adhesive 12 preferentially remains in the first outer packaging material 10 when the heating pack 1 is removed from the user's clothes after use. It is desirable to embed between part 3. The pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer 12 is non-breathable. However, as described above, the pressure-sensitive adhesive layer 12 is breathable by being provided in a spider web shape, a linear shape, or randomly. can do.

[0101] The second outer packaging material 11 is also provided on the base 6 side via the adhesive layer 9.

The first surface 16 of the heat generating pack 33 is attached to the clothing, and the opposite surface 17 is positioned on the body side.

Here, the first outer packaging material 10 and the adhesive layer 8 to which the first outer packaging material 10 is bonded are more permeable to the air than the covering material 7. Furthermore, the oxygen permeability of the coating material 7 is preferably not changed significantly. Thereby, the air permeability of the covering material 7 can adjust the flow rate of oxygen to each section heat generating part 3.

[0102] A separator 13 may be provided to protect the adhesive layer 12. The adhesive material layer 12 is stronger to the outer packaging material 10 than the adhesive force to the surface of the separator or adhesive object. It is preferable to have a strong bond. Further, the adhesive layer 12 to the garment is provided on the first surface 16 and is preferably a linear adhesive or fibrils.

[0103] Heat generation performance by increasing the air permeability of the section heating section 3 by the air permeability amount lower than the air permeability of the first outer packaging material 10 and the first adhesive layer 8 and the air permeability of the adhesive layer 12 You may make it raise.

[0104] The position, area ratio, shape, and air permeability of the adhesive layer and the pressure-sensitive adhesive layer provided on the air permeable surface are as follows.

The position is not particularly limited, but it is preferable to disperse it uniformly on the air-permeable adhesive surface so that it can be applied to clothes efficiently with a small area. In order to form a breathable adhesive surface, for example, an adhesive is partially provided in advance on a breathable packaging material, or a needle hole is opened after the adhesive is applied to almost the entire surface of a non-breathable packaging material. There are methods such as making it breathable. The area ratio is usually 5 to 95%, preferably 20 to 70% of the entire area of the air-permeable adhesive surface. If it is less than 5%, the outer packaging material 10 and the heat generating pack 1 are easily peeled off, while if it exceeds 95%, it is difficult to form a vent.

Regarding the shape, the adhesive layer and the pressure-sensitive adhesive layer may be provided in a polka dot shape, a spot shape, a turtle shell shape, a stripe shape, or a lattice shape, and the shape is not particularly limited. Further, the amount of the adhesive applied per unit area is not particularly limited. The application distribution of the adhesive is not particularly limited, but it is preferable to set a substantially uniform air permeability on the entire air permeable surface in order to achieve uniform heat generation characteristics. A distribution having a substantially uniform distribution is advantageous.

[0105] Breathability of the breathable pressure-sensitive surface means breathability in a state where an adhesive or pressure-sensitive adhesive is applied, and the breathable surface or pressure-sensitive adhesive layer provided with the adhesive layer The provided breathable adhesive surface. Its breathability is the moisture permeability by the Lisssy method (Lyssy method), usually 50 to 10, OOOgZm, 24hr, preferably 70 to 5, OOOgZm, 24hr, more preferably 100 to 2, OOOgZm. 24 hours, more preferably 100 to 700 gZm so 24 hours.

[0106] Separately, the adhesive layer 12 may be an adhesive film or a mechanical fixing means. In this case, if it is attached to the adherend surface under conditions such as a predetermined pressure, a separate Data 13 may be excluded.

The same applies to the case where the base material 6 has air permeability instead of the covering material 7. FIG. 7 shows an example in which the base material 6 side of the heat generating pack 1 is made air-permeable, and the separator 11 is provided on the entire surface of the base material 6 via a spider web-like adhesive layer 9.

8 and 9 show another embodiment of the heat generating pack 1. The pressure-sensitive adhesive layer 12 is a straight parallel stripe extending at the upper end force and the lower end at the section of the heat generating pack, and this pressure-sensitive adhesive layer 12 is provided on the first outer packaging material 10 side. As a method of providing the pressure-sensitive adhesive layer 12, there is a belt-like coating or printing by curtain spray. With this configuration, oxygen can be passed through the section heat generating section 3. Separator 13 is preferably siliconized paper

FIG. 10 shows a panty 18 having a crotch 19 and a front panel 20. The fever pack 1 is preferably placed in the direction of the top edge located near the panty 18 waistband. In this case, the fever pack 33 functions as a fever pack for menstrual pain relief. The method of using the fever pack 1 is not limited. As another method of use, a fever pack is wrapped around the neck and the back of the neck is warmed, so that it can be used as a fever pack for relieving eye fatigue or a fever pack for relieving headache.

[0109] As shown in Fig. 11, the heat-generating pack 1 is folded and stored in a non-breathable outer bag 21 so that the base material 6 side of the heat-generating pack 1 is inside when storing or transporting. .

[0110] The heat pack 1 is mainly fixed to the inside of the garment and the other side is in contact with the body. The normal operating temperature is 39 ° C to 45 ° C, and 39 ° C to 45 ° C. The oxygen permeability required to maintain the temperature is very low.

The divided heat generating portion 3 of the present invention is composed of, for example, a heat generating composition molded body 2 having a size of a major axis of 40 mm X a minor axis of 20 mm, a thickness of 3 mm, and 2.8 grams. And when the air permeability is 400gZm ² Z24hr with the moisture permeability of Risshi method, when exposed to 1 atmosphere of air at 20 ° C, a temperature of about 41 ° C is generated for about 8 hours. This permeability is achieved by 26 openings having a diameter of 0.5 mm in the base material 6 or the covering material 7 constituting the section heating part 3.

Claims

The scope of the claims

[1] A heat-generating composition formed by molding a heat-generating composition that forms heat upon contact with oxygen in the air is laminated on a substantially planar base material, and further covered with a coating material to form a heat-generating composition. A heat generating pack having a heat generating portion formed by heat sealing a peripheral portion of the formed body, and a section formed by the heat generating composition formed body, and a section formed by the heat seal,

2) The substrate does not have pockets, storage compartments or storage areas,

6) The heat generating pack characterized in that the bending resistance in the longitudinal direction of the heating pack is 1 OO mm or less and the bending resistance ratio in the short direction of the direction is 50 or more.

[2] The heat generating pack according to [1], wherein the bending resistance of the base material and the covering material is 200 mm or less.

[3] The heat generating portion has a plurality of divided heat generating portions provided via the dividing portion, and at least one of the four adjacent divided heat generating portions whose center point forms a quadrilateral is the other three Each of the sections so as to block at least one end of at least one of the lines passing through the center line of the minimum width of the section existing between the section heat generating sections and orthogonal to the center line. The heat generating parts are sufficiently close to each other, and the width of at least one section between the four adjacent heat generating parts is not more than 37.5% of the minimum diameter of the four adjacent heat generating parts. The heat generating pack according to claim 1, wherein:

[4] The heat generating portion has a plurality of divided heat generating portions provided via the dividing portion, and at least one of the three adjacent divided heat generating portions whose center point forms a triangle is the other two sections. It passes through the center line of the minimum width of the dividing part existing between the divided heat generation parts, and is orthogonal to the center line. The minimum width of the sectioning portion existing between the three adjacent section heating portions so as to block one end of a straight line is a measurement value of the minimum diameter of the section heating portion constituting the triangle. 2. The heat generating pack according to claim 1, wherein the heat generating pack is 15% or less.

[5] The moldable exothermic composition comprises a water retention agent, a water-absorbing polymer, a pH adjuster, a hydrogen generation inhibitor, an aggregate, a fibrous material, a functional substance, a surfactant, an organic silicon compound, and a pyroelectric substance. , Moisturizers, fertilizer components, hydrophobic polymer compounds, exothermic aids, metals other than iron, metal oxides other than iron oxide, acidic substances or mixtures thereof, at least The exothermic pack according to claim 1, which contains one kind.

[6] The first outer packaging material is provided on the covering material side of the heat generating pack according to claim 1, the second outer packaging material is provided on the base material side, and the heat generating pack includes the first and second heat generating packs. A first surface and a second surface are concave and convex, and the heat generating pack has means comprising an adhesive layer as a fixing means, and the means is provided on the first surface comprising the first outer packaging material. The first surface has an oxygen permeation means, has a longitudinal bending resistance of 100 mm or less, and a transverse bending resistance ratio perpendicular to the first surface is 50 or more. A fever pack to do.

[7] A method of use for holding the heat-generating pack according to claim 1 between clothes and skin, wherein the heat-generating pack is placed inside the clothes via an adhesive layer provided on the ventilation surface of the heat-generating pack. A method of using the heat-generating pack, characterized in that the skin temperature is maintained at 32 ° C to 50 ° C for a period of 20 seconds to 24 hours by attaching the other surface to the skin.