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WO2013129325A1 - Article absorbant - Google Patents

Article absorbant Download PDF

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Publication number
WO2013129325A1
WO2013129325A1 PCT/JP2013/054794 JP2013054794W WO2013129325A1 WO 2013129325 A1 WO2013129325 A1 WO 2013129325A1 JP 2013054794 W JP2013054794 W JP 2013054794W WO 2013129325 A1 WO2013129325 A1 WO 2013129325A1
Authority
WO
WIPO (PCT)
Prior art keywords
chain hydrocarbon
acid
hydrocarbon moiety
ester
region
Prior art date
Application number
PCT/JP2013/054794
Other languages
English (en)
Japanese (ja)
Inventor
野田　祐樹
竜也 田村
貴志 野本
卓 小野塚
Original Assignee
ユニ・チャーム株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2012082503A external-priority patent/JP5709789B2/ja
Application filed by ユニ・チャーム株式会社 filed Critical ユニ・チャーム株式会社
Publication of WO2013129325A1 publication Critical patent/WO2013129325A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/51—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers of the pads
    • A61F13/511—Topsheet, i.e. the permeable cover or layer facing the skin
    • A61F13/51104—Topsheet, i.e. the permeable cover or layer facing the skin the top sheet having a three-dimensional cross-section, e.g. corrugations, embossments, recesses or projections
    • A61F13/51108—Topsheet, i.e. the permeable cover or layer facing the skin the top sheet having a three-dimensional cross-section, e.g. corrugations, embossments, recesses or projections the top sheet having corrugations or embossments having one axis relatively longer than the other axis, e.g. forming channels or grooves in a longitudinal direction
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/45—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the shape
    • A61F13/47—Sanitary towels, incontinence pads or napkins
    • A61F13/472—Sanitary towels, incontinence pads or napkins specially adapted for female use
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/51—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers of the pads
    • A61F13/511—Topsheet, i.e. the permeable cover or layer facing the skin
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F13/00—Bandages or dressings; Absorbent pads
    • A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
    • A61F13/51—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators characterised by the outer layers of the pads
    • A61F13/511—Topsheet, i.e. the permeable cover or layer facing the skin
    • A61F13/512—Topsheet, i.e. the permeable cover or layer facing the skin characterised by its apertures, e.g. perforations
    • A61F13/5126—Topsheet, i.e. the permeable cover or layer facing the skin characterised by its apertures, e.g. perforations characterised by the planar distribution of the apertures, e.g. in a predefined pattern

Definitions

  • the present invention relates to absorbent articles such as sanitary napkins, panty liners, disposable diapers, incontinence pads, and incontinence liners.
  • a general absorbent article includes a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body provided between the top sheet and the back sheet. Is absorbed and held by the absorber. And the device which prevents that the absorber is compressed too much at the time of a deformation
  • a liquid-impermeable plastic film is composed of a surface provided with a large number of holes and a surface that forms side walls along the holes to form a three-dimensional structure.
  • an object of the present invention is to provide a novel absorbent article capable of regular torsional deformation.
  • the present invention provides an absorbent comprising a liquid-permeable sheet, a liquid-impermeable sheet, and an absorbent body provided between the liquid-permeable sheet and the liquid-impermeable sheet.
  • a high-rigidity region and a low-rigidity region are formed in a liquid supply region that receives liquid supply in the liquid-permeable sheet, and the high-rigidity region of the absorbent article
  • the first region has a substantially linear shape extending in a direction intersecting the longitudinal direction and arranged substantially in parallel so that the rigidity of the low rigidity region is lower than that of the high rigidity region.
  • the absorbent article having a liquid permeation hole formed in the above is provided.
  • the absorbent article of the present invention When the absorbent article of the present invention is torsionally deformed, regular torsional deformation starting from the first region of the high rigidity region having higher rigidity than the low rigidity region is possible. Moreover, the torsionally deformed absorbent article is easily restored to the original shape by the elastic restoring force in the high rigidity region.
  • a novel absorbent article capable of regular torsional deformation is provided.
  • FIG. 1 is a plan view of a sanitary napkin according to an embodiment of the present invention.
  • FIG. 2 is a schematic cross-sectional view showing a cross section taken along line AA of FIG.
  • FIG. 3 is a partially broken perspective view showing a high rigidity region and a low rigidity region of the top sheet in the sanitary napkin according to the embodiment of the present invention in an enlarged manner.
  • FIG. 4 is a perspective view when the sanitary napkin according to the embodiment of the present invention is twisted and deformed.
  • FIG. 5 is a perspective view when a sanitary napkin according to an embodiment of the present invention is deformed in a convex shape.
  • Drawing 6 is a figure for explaining the manufacturing method of the sanitary napkin concerning one embodiment of the present invention.
  • Drawing 7 is a figure for explaining a crevice formation roll used for manufacture of a sanitary napkin concerning one embodiment of the present invention.
  • FIG. 8 is a view for explaining a region of the top sheet in which the concave portion is formed by the concave portion forming roll.
  • FIG. 9 is a view for explaining an upper roll of a stretched gear roll used for manufacturing a sanitary napkin according to an embodiment of the present invention.
  • FIG. 10 is a view for explaining a lower roll of a stretched gear roll used for manufacturing a sanitary napkin according to an embodiment of the present invention.
  • FIG. 11 is a view for explaining a top sheet stretched by a stretched gear roll.
  • FIG. 12 is an electron micrograph of the skin contact surface of the top sheet in a sanitary napkin in which the top sheet contains tri-C2L oil fatty acid glycerides.
  • FIG. 13 is a micrograph of menstrual blood with or without a blood modifying agent.
  • FIG. 14 is a diagram for explaining a method of measuring surface tension.
  • the liquid supply area is an area appropriately set in the liquid permeable sheet according to the type and application of the absorbent article, and the liquid supply area set in the liquid permeable sheet.
  • the position and area of the region are not particularly limited.
  • the liquid supply area may be set as an area substantially the same as the area where the liquid is actually supplied, or may be set as an area larger than that, but prevents the liquid from leaking to the outside. In view of this, it is preferable to set the region larger than the region where the liquid is actually supplied.
  • the high rigidity region is a region having higher rigidity than the low rigidity region
  • the low rigidity region is a region having lower rigidity than the high rigidity region. That is, “high rigidity” and “low rigidity” mean the relative rigidity of both regions.
  • the high-rigidity region has flexibility (that is, elastic restoring force against deformation).
  • the high-rigidity region may be stretched by a force applied at the time of deformation, but it is preferable that the high-rigidity region is not substantially stretched by a force applied at the time of deformation from the viewpoint of increasing an elastic restoring force against the deformation.
  • the size and number of liquid permeation holes formed in the low-rigidity region are not particularly limited. As long as the rigidity of the low-rigidity region is lower than that of the high-rigidity region, liquid permeation holes may be formed in the high-rigidity region.
  • the first region of the high-rigidity region does not have a liquid permeable hole (Aspect 1).
  • the aspect 1 regular torsional deformation starting from the first region of the high-rigidity region is effectively generated.
  • the torsionally deformed absorbent article is easily restored to the original shape by the elastic restoring force of the first region of the high rigidity region.
  • the high-rigidity region has a substantially linear second region that extends in a direction intersecting the first region and is arranged substantially in parallel (Aspect 2). .
  • the twisting direction of the absorbent article is changed, regular twisting deformation starting from the first region or the second region of the high-rigidity region is possible.
  • the second region of the high-rigidity region does not have a liquid permeation hole (Aspect 3).
  • the regular torsional deformation starting from the second region of the high rigidity region is effectively generated.
  • the torsionally deformed absorbent article is easily restored to the original shape by the elastic restoring force of the second region of the high rigidity region.
  • the high rigidity area is formed in a mesh shape by the intersection of the first area and the second area, and the low rigidity area is formed inside each mesh (an aspect 4). ).
  • the torsionally deformed absorbent article is easily restored to the original shape by the elastic restoring force of the highly rigid region formed in a mesh shape.
  • an expandable bellows part is formed in the low-rigidity region (aspect 5).
  • the bellows portion has a repeated structure of a mountain fold portion and a valley fold portion, and can be extended in the surface direction of the low rigidity region.
  • the bellows portion may have contractility in addition to stretchability. Even if the bellows portion is contractible, depending on the material of the bellows portion, the number of bellows, etc., the stretched bellows portion does not completely shrink to the original state, and it is more than the original state. In some cases, the stretched state may be maintained.
  • the absorbent article when the absorbent article is deformed while changing the angle at which the absorbent article is bent (for example, when the absorbent article wearer changes the posture, the angle at which the absorbent article is bent becomes an acute angle or an obtuse angle) ) Since the liquid permeable sheet easily follows the deformation of the absorbent article due to the elastic restoring force of the high rigidity region, the liquid permeable sheet is prevented from being bent due to the expansion of the bellows portion.
  • the bellows part has a mountain fold part and a valley fold part extending in the longitudinal direction of the absorbent article, juxtaposed in the width direction of the absorbent article, and having a wavy cross section along the width direction.
  • Aspect 6 when the absorbent article is bent along its longitudinal direction and is deformed in a convex shape toward the liquid supply region side, the bellows portion extends in the width direction of the absorbent article and the elasticity of the high rigidity region Since the restoring force is effectively generated, over-compression of the absorber is effectively prevented, and bending of the liquid permeable sheet due to the expansion of the bellows portion is effectively prevented.
  • the liquid permeation hole is formed in the side surface part of the mountain fold part and the valley fold part (aspect 7).
  • the liquid permeable hole is formed in a portion where the tension is not directly applied. Therefore, the liquid permeable hole is stretched by the tension and the absorber is not exposed.
  • the liquid permeation hole is formed at the uppermost part of the mountain fold part or the lowermost part of the valley fold part (Aspect 8).
  • the liquid permeable hole is formed in a portion where the tension is not directly applied, and therefore, the liquid permeable hole is prevented from being stretched by the tension and the absorber is not exposed.
  • a pressing groove is formed in the peripheral portion of the liquid supply region (Aspect 9).
  • the absorbent article is easily and stably deformed starting from the compressed groove, and when the absorbent article is deformed, the expansion of the bellows part and the elastic restoring force of the high rigidity region are effectively generated. The compression is effectively prevented, and the deflection of the liquid permeable sheet due to the expansion of the bellows portion is effectively prevented.
  • the liquid permeable sheet has an IOB of 0.00 to 0.60, a melting point of 45 ° C. or less, and a water solubility of 0.00 to 0.05 g with respect to 100 g of water at 25 ° C.
  • the blood modifying agent which has this is included (aspect 10).
  • the absorption target of the absorbent article is menstrual blood
  • the menstrual blood that has reached the liquid permeable sheet is reformed in contact with the blood modifying agent, so that the liquid permeable sheet has high viscosity. Blood hardly remains, the sticky feeling of the liquid-permeable sheet is reduced, the smooth feeling is improved, and the wearer is less likely to visually feel discomfort.
  • the blood modifying agent is, for example, the following (i) to (iii): (I) hydrocarbons; (Ii) from (ii-1) a hydrocarbon moiety and (ii-2) a carbonyl group (—CO—) and an oxy group (—O—) inserted between the CC single bonds of the hydrocarbon moiety.
  • the hydrocarbon moiety A compound having one or a plurality of the same or different groups selected from the group consisting of a carboxyl group (—COOH) and a hydroxyl group (—OH), which replaces a hydrogen atom;
  • the oxy groups are not adjacent (Aspect 11).
  • the blood modifying agent is, for example, the following (i ′) to (iii ′): (I ′) a hydrocarbon; (Ii ′) (ii′-1) a hydrocarbon moiety and (ii′-2) a carbonyl bond (—CO—), an ester bond (—COO) inserted between the C—C single bonds of the hydrocarbon moiety.
  • the blood modifying agent is, for example, the following (A) to (F): (A) (A1) a compound having a chain hydrocarbon moiety and 2 to 4 hydroxyl groups substituting hydrogen atoms in the chain hydrocarbon moiety, (A2) a chain hydrocarbon moiety, and the chain An ester with a compound having one carboxyl group that replaces a hydrogen atom in the hydrocarbon moiety; (B) (B1) a compound having a chain hydrocarbon moiety and 2 to 4 hydroxyl groups substituting for hydrogen atoms in the chain hydrocarbon moiety, (B2) a chain hydrocarbon moiety, and the chain An ether with a compound having one hydroxyl group replacing a hydrogen atom of the hydrocarbon moiety; (C) (C1) a carboxylic acid, a hydroxy acid, an alkoxy acid or an oxo acid containing a chain hydrocarbon moiety and 2 to 4 carboxyl groups replacing the hydrogen atom of the chain hydrocarbon moiety; C2) an ester of
  • the blood modifying agent is, for example, (a 1 ) an ester of a chain hydrocarbon tetraol and at least one fatty acid, or (a 2 ) an ester of a chain hydrocarbon triol and at least one fatty acid.
  • two or more of the modes 1 to 14 may be combined.
  • the type and application of the absorbent article of the present invention are not particularly limited, and examples thereof include sanitary products and sanitary products such as sanitary napkins, panty liners, disposable diapers, incontinence pads, incontinence liners, sweat removal sheets, and the like. These may include humans, and may also target non-human animals such as pets.
  • the liquid which an absorptive article makes absorption object is not specifically limited, For example, a user's liquid excrement, body fluid, etc. are mentioned.
  • an embodiment of the absorbent article of the present invention will be described using a sanitary napkin as an example.
  • the sanitary napkin 1 As shown in FIGS. 1 and 2, the sanitary napkin 1 according to the first embodiment includes a liquid-permeable top sheet 2, a liquid-impermeable back sheet 3, and between the top sheet 2 and the back sheet 3. And an absorber 4 provided on the surface.
  • FIG. 1 the X-axis direction corresponds to the width direction of the sanitary napkin 1
  • the Y-axis direction corresponds to the longitudinal direction of the sanitary napkin 1
  • the plane direction extending along the X-axis Y-axis corresponds to the plane direction of the sanitary napkin 1.
  • FIG. 2 is a schematic cross-sectional view, and the bellows portion 210 formed on the top sheet 2 is omitted.
  • the sanitary napkin 1 is worn by the user for the purpose of absorbing liquid excretion (particularly menstrual blood).
  • the user wears the top sheet 2 on the user's skin side and the back sheet 3 on the user's clothes (underwear) side.
  • the liquid excreta passes through the top sheet 2 to reach the absorber 4 and is absorbed and held by the absorber 4. Leakage of liquid excretion absorbed and held by the absorbent body 4 is prevented by the back sheet 3.
  • the top sheet 2 and the back sheet 3 have end portions in the longitudinal direction joined together by seal portions 7 a and 7 b to form a main body portion 11, and end portions in the width direction are aligned with each other.
  • the substantially rectangular wing parts 12a and 12b which are joined by the seal parts 8a and 8b and extend from the main body part 11 in the width direction are formed. Since the peripheral portions of the top sheet 2 and the back sheet 3 are joined by the seal portions 7a, 7b, 8a and 8b, the two sheets are prevented from being separated when the sanitary napkin 1 is deformed.
  • the shape of the main body 11 can be appropriately changed within a range suitable for a female body, underwear, and the like, and may be, for example, a substantially rectangular shape, a substantially oval shape, or a substantially bowl shape.
  • the total length in the longitudinal direction of the main body 11 is usually 100 to 500 mm, preferably 150 to 350 mm, and the total length in the width direction of the main body 11 is usually 30 to 200 mm, preferably 40 to 180 mm.
  • Examples of the bonding mode by the seal portions 7a, 7b, 8a, and 8b include embossing, ultrasonic waves, hot melt adhesives, and the like. In order to increase the bonding strength, two or more bonding modes may be combined (for example, embossing is performed after bonding with a hot-melt adhesive).
  • Examples of the embossing include a method of embossing by passing the top sheet 2 and the back sheet 3 together between a patterned embossing roll and a flat roll (a method called a so-called round seal). In this method, since each sheet is softened by heating the embossing roll and / or the flat roll, the seal portion tends to be clear.
  • Examples of the emboss pattern include a lattice pattern, a staggered pattern, and a wavy pattern. The embossed pattern is preferably intermittently elongated so that the sanitary napkin 1 is not easily bent at the boundary of the seal portion.
  • the hot melt adhesive for example, styrene-ethylene-butadiene-styrene (SEBS), styrene-butadiene-styrene (SBS), styrene-isoprene-styrene (SIS), or the like, or linear Pressure-sensitive adhesives or heat-sensitive adhesives mainly composed of olefins such as low density polyethylene; water-soluble polymers (for example, polyvinyl alcohol, carboxymethyl cellulose, gelatin, etc.) or water-swellable polymers (for example, polyvinyl acetate, poly And water sensitive adhesives such as sodium acrylate).
  • the method for applying the adhesive include spiral coating, coater coating, curtain coater coating, and summit gun coating.
  • adhesive portions 9 a and 9 b are provided on the clothing side of the backsheet 3 that forms the wing portions 12 a and 12 b, and on the clothing side of the backsheet 3 that forms the main body portion 11, An adhesive portion 9c is provided.
  • the sanitary napkin 1 is obtained by attaching the adhesive portion 9c to the crotch portion of the underwear, bending the wing portions 12a and 12b to the outer surface side of the underwear, and attaching the adhesive portions 9a and 9b to the crotch portion of the underwear. Stablely fixed to underwear.
  • Examples of the adhesive contained in the adhesive portions 9a, 9b and 9c include styrene-ethylene-butylene-styrene block copolymer, styrene-butylene polymer, styrene-butylene-styrene block copolymer, styrene-isobutylene- Styrene polymers such as styrene copolymers; tackifiers such as C5 petroleum resins, C9 petroleum resins, dicyclopentadiene petroleum resins, rosin petroleum resins, polyterpene resins, terpene phenol resins; trifresyl phosphate, phthalic acid Examples include monomer plasticizers such as dibutyl and dioctyl phthalate; polymer plasticizers such as vinyl polymer and polyester.
  • the top sheet 2 is provided on the surface in contact with the user's skin for the purpose of improving the touch when the user wears the sanitary napkin 1.
  • the top sheet 2 is provided with a waste supply area 20 for receiving liquid waste from the user.
  • the excrement supply area 20 includes a first area 20a where a user's excretion opening (for example, a small labia, a large labia, a vaginal opening, etc.) abuts, and a second area 20b located around the first area 20a.
  • the length of the excreta supply area 20 is usually 50 to 200 mm, preferably 70 to 150 mm, and the width is usually 10 to 80 mm, preferably 20 to 50 mm.
  • the first region 20a is wider than the region where the user's excretion port actually contacts in order to improve the absorbability of the liquid excrement.
  • the second region 20b is arranged around the first region 20a in order to prevent leakage of liquid excrement that has not been absorbed from the first region 20a.
  • the second region 20b effectively prevents leakage of liquid excrement that has not been absorbed from the first region 20a, particularly from the width direction of the sanitary napkin 1.
  • the top sheet 2 is made of a flexible material.
  • the flexible material is a material having an elastic restoring force (repulsive force) against deformation.
  • the flexible material may be stretched by a force applied at the time of deformation, but it is preferable that the flexible material is not substantially stretched by a force applied at the time of deformation from the viewpoint of increasing an elastic restoring force against the deformation.
  • Examples of the flexible material include a synthetic resin.
  • Examples of the synthetic resin include a copolymer of an olefin and another monomer such as an acrylate ester and vinyl acetate; a low density polyethylene and a linear low density polyethylene.
  • Polyolefins such as high-density polyethylene and polypropylene; polyesters such as polyethylene terephthalate; polyamides; cellulose acetate and the like.
  • copolymers of olefins and other monomers because of their high flexibility and low irritation to the skin. Polyolefin and the like are preferable.
  • the flexible material is a mixed material of two or more kinds of synthetic resins, for example, a mixed material of 20 to 60% low density polyethylene, 30 to 60% linear low density polyethylene, and 5 to 20% high density polyethylene. Also good.
  • the top sheet 2 has a high-rigidity region 22 formed in a mesh shape, and a low-rigidity region 21 is formed inside each mesh.
  • the low-rigidity region 21 and the high-rigidity region 22 are made of the same flexible material, but the low-rigidity region 21 has a liquid-permeable hole, and the high-rigidity region 22 has a liquid-permeable hole. Therefore, the rigidity of the low rigidity region 21 is lower than that of the high rigidity region 22.
  • the low-rigidity region 21 is formed with a bellows portion 210 having a repeated structure of a mountain fold portion and a valley fold portion.
  • the bellows part 210 can be extended in the surface direction of the low-rigidity region 21 by stretching the mountain fold part and the valley fold part.
  • the convex portion on the upper side is the mountain fold portion
  • the convex portion on the lower side is the valley fold portion.
  • the mountain fold portion and the valley fold portion of the bellows portion 210 extend in the longitudinal direction of the sanitary napkin 1 and are juxtaposed in the width direction of the sanitary napkin 1. Yes. With such an arrangement, the bellows part 210 is easily stretched in the width direction of the sanitary napkin 1, and the sanitary napkin 1 is bent along the longitudinal direction and is convex toward the top sheet 2 side. When deformed, the bellows portion 210 is effectively stretched, and excessive compression of the absorbent body 4 by the low rigidity region 21 is effectively prevented.
  • the cross-section of the bellows portion 210 along the width direction of the top sheet 2 is substantially wave-shaped.
  • the substantially wave shape includes a shape in which a U-shaped curve is changed to a straight line, a U-shape is changed to a U-shape, a U-shape is changed to a V-shape, and the like.
  • the width of the top of the mountain fold and the width of the bottom of the valley fold are usually 0.1 to 2.0 mm, preferably 0.2 to 1.5 mm.
  • the height of the mountain fold and the valley fold The depth is usually 0.3 to 3.0 mm, preferably 0.5 to 1.5 mm, and the width between the uppermost portions of the adjacent mountain fold portions and the width between the lowermost portions of the adjacent valley fold portions are The thickness is usually 0.3 to 3.0 mm, preferably 0.5 to 2.0 mm.
  • the bellows portion 210 may have contractility in addition to stretchability. However, even if the bellows part 210 has contractibility, the stretched bellows part 210 does not completely contract to the original state depending on the material of the bellows part 210, the number of bellows, etc. There is a case where the state slightly stretched than the state is maintained.
  • an elastomer material may be mixed with the flexible material constituting the top top sheet 2.
  • the elastomer include polyester-based, urethane-based, olefin-based, styrene-based, and polyamide-based thermoplastic elastomers, low-density polyethylene using a metallocene catalyst, ethylene- ⁇ -olefin copolymer, and combinations thereof.
  • polyester-based elastomer examples include those containing an aromatic polyester as a hard segment, amorphous polyether, aliphatic polyester, etc. as a soft segment
  • urethane-based elastomer examples include, for example, a thermoplastic elastomer, Polyurethanes made of polyester, low molecular glycol, methylene bisphenyl isocyanate, etc. are mentioned.
  • olefin elastomers include random copolymers of ethylene and ⁇ -olefins, and random copolymers of ethylene, ⁇ -olefins and dienes.
  • polystyrene elastomer examples include block copolymers such as SEBS, SIS, SEPS, and SBS.
  • polyamide elastomer examples include a hard segment. And those containing a polyester or polyol as a soft segment.
  • the high-rigidity region 22 extends in a direction crossing the longitudinal direction of the sanitary napkin 1, and is a substantially linear m number of regions (hereinafter “ Region A 1-m ”) and n substantially linear regions (hereinafter referred to as“ region B 1-n ”) extending in a direction intersecting the region A 1-m and arranged substantially parallel to each other. And the region A 1-m and the region B 1-n intersect to form a mesh. Since the high-rigidity region 22 is formed in a mesh shape, the sanitary napkin 1 that has been torsionally deformed is easily restored to the original shape by the elastic restoring force of the high-rigidity region 22.
  • the angle ⁇ 1 at which the region A 1-m intersects the longitudinal direction of the sanitary napkin 1 is usually 1 ° ⁇ ⁇ 1 ⁇ 90 °, preferably 10 ° ⁇ ⁇ 1 ⁇ 80 °, more preferably 30 ° ⁇ ⁇ 1.
  • the angle alpha 2 region B 1-n intersects the longitudinal direction of the sanitary napkin 1 (however, the angle at which the region B 1-n crosses the area a 1-m and alpha 1 + alpha 2 ) Is usually 1 ° ⁇ ⁇ 2 ⁇ 90 °, preferably 10 ° ⁇ ⁇ 2 ⁇ 80 °, more preferably 30 ° ⁇ ⁇ 2 ⁇ 60 °.
  • ⁇ 1 and ⁇ 2 are selected so that ⁇ 1 + ⁇ 2 does not become 180 °.
  • ⁇ 1 and ⁇ 2 are in the above range, the size of each mesh necessary for forming the bellows portion 210 is secured. Further, the sanitary napkin 1 that has been torsionally deformed is easily restored to the original shape by the elastic restoring force of the highly rigid region 22 formed in a mesh shape.
  • the region A 1-m and the region B 1-n are located on both sides of the sanitary napkin 1 with respect to the longitudinal direction, when the sanitary napkin 1 is bent along the longitudinal direction and deformed in a convex shape, The elastic restoring force (repulsive force) of the high rigidity region 22 with respect to the convex deformation is easily exhibited.
  • the number (m) of the regions A 1-m and the number (n) of the regions B 1-n are not limited to the numbers shown in FIG. m and n are the same or different numerical values, and the numerical range of m and n is usually 4 to 60, preferably 8 to 40, more preferably 10 to 35.
  • each of the areas A 1-m and B 1-n is usually 0.1 to 5 mm, preferably 0.3 to 3 mm, and more preferably 0.5 to 2 mm.
  • the widths of the area A 1-m and the area B 1-n are in the above range, the size of each mesh necessary for forming the bellows portion 210 is secured.
  • the sanitary napkin 1 that has been torsionally deformed is easily restored to the original shape by the elastic restoring force of the highly rigid region 22 formed in a mesh shape.
  • the elastic restoring force (repulsive force) of the high-rigidity region 22 with respect to the convex deformation is easily exhibited.
  • each mesh formed by intersecting the region A 1-m and the region B 1-n is a substantially rhombus shape as shown in FIGS.
  • the shape of each mesh may be a substantially polygonal shape such as a substantially triangular shape, a substantially rectangular shape, or a substantially pentagonal shape.
  • the substantially polygonal shape includes a shape to which a corner is rounded or a straight line constituting one side is curved.
  • the region A 1-m and the region B 1-n may be curved, and the shape of each mesh may be a substantially circular shape, a substantially elliptical shape, or the like.
  • the size of each mesh formed by intersecting the region A 1-m and the region B 1-n is usually 3 to 40 mm, preferably 5 to 30 mm, more preferably in both the longitudinal direction and the width direction of the sanitary napkin 1. Is 10 to 20 mm.
  • the size of each mesh is in the above range, the size of each mesh necessary for forming the bellows portion 210 is secured.
  • the sanitary napkin 1 that has been torsionally deformed is easily restored to the original shape by the elastic restoring force of the highly rigid region 22 formed in a mesh shape.
  • the elastic restoring force (repulsive force) of the high-rigidity region 22 with respect to the convex deformation is easily exhibited.
  • the total number of mountain folds and valley folds formed in each mesh is usually 3 or more, preferably 5 to 19, and more preferably 7 to 15. However, the total number of mountain folds and valley folds is an odd number.
  • the total number of the mountain folds and the valley folds of the bellows part 210 is in the above range, when the sanitary napkin 1 is bent along the longitudinal direction and deformed in a convex shape, the bellows part 210 is stretched with respect to the convex deformation. Effectively occurring, excessive compression of the absorber 4 is effectively prevented.
  • the high-rigidity region 22 surrounds the entire periphery of the low-rigidity region 21, and the connection between adjacent low-rigidity regions is blocked by the high-rigidity region 22.
  • a part of the periphery of the low-rigidity region 21 may be surrounded by the high-rigidity region 22 by modifying the present embodiment.
  • the high-rigidity region 22 surrounds 30% or more of the entire periphery of the low-rigidity region 21 from the viewpoint of effectively generating the expansion of the bellows part 210 and the elastic restoring force of the high-rigidity region 22. It is more preferable to surround 50% or more.
  • the high rigidity region 22 is continuous with the peripheral portion of the low rigidity region 21. As shown in FIG. 3, the high-rigidity region 22 is continuous with the uppermost portion of the mountain fold portion of the bellows portion 210. By changing the present embodiment, the high-rigidity region 22 may be continuous with the lowermost part of the valley fold portion of the bellows portion 210. However, when the high-rigidity region 22 is on the skin surface side, the touch of the top sheet 2 becomes smooth, so that the high-rigidity region 22 is continuous with the uppermost part of the mountain fold portion of the bellows part 210 as shown in FIG. It is preferable.
  • the top sheet 2 has a plurality of liquid permeation holes 26, and the liquid excretion can permeate the absorber 4 through the liquid permeation holes 26.
  • the liquid permeation hole 26 includes a low-rigidity region 21 where the tension is not directly applied during deformation in the excreta supply region 20 of the top sheet 2 (in the bellows portion 210, the uppermost portion of the mountain fold portion). Although it is formed on the side surface portion 25) that connects the lowest part of the valley fold portion, it is not formed in the high-rigidity region 22 to which tension is directly applied during deformation.
  • the liquid permeation hole 26 may be formed in the uppermost part of the mountain fold part or the lowermost part of the valley fold part of the bellows part 210, or the bellows part 210 may be omitted and the low rigidity region 21 may be formed.
  • the liquid permeation hole 26 may be formed in the substantially flat low rigidity region 21.
  • the opening area of one liquid permeation hole 26 is preferably 0.001 to 1 mm 2 , more preferably 0.01 to 0.1 mm 2 .
  • the opening area of one liquid permeation hole 26 is smaller than 0.001 mm 2 , the liquid excretion may be difficult to permeate, and when it exceeds 1 mm 2 , the liquid excrement once absorbed by the absorber 4 In some cases, the top sheet 2 may go back through the liquid permeation holes 26, or the concealability of the top sheet 2 may be reduced.
  • the ratio of the total opening area to the area of the top sheet 2, that is, the opening ratio of the top sheet 2 is preferably 5 to 20%.
  • the opening ratio of the top sheet 2 is less than 5%, the permeability of the body fluid in the top sheet 2 may be deteriorated.
  • the opening ratio of the top sheet 2 exceeds 20%, the absorbent body 4 is once absorbed. The body fluid may go back through the liquid permeation hole 26 of the top sheet 2 or the liquid excretion absorbed by the absorber 4 through the liquid permeation hole 26 may be seen.
  • the thickness, basis weight, and the like of the top sheet 2 are appropriately adjusted from the viewpoint of the formability of the bellows portion 210 of the low-rigidity region 21 and the flexibility of the high-rigidity region 22.
  • the basis weight of the top sheet 2 is usually 10 g / m 2 or more, preferably 10 to 40 g / m 2 , more preferably 20 to 30 g / m 2 , and the thickness of the top sheet 2 is usually 0.01 to 3 0.0 mm, preferably 0.1 to 1.5 mm.
  • the top sheet 2 may contain an inorganic filler such as titanium oxide, barium sulfate, or calcium carbonate.
  • the top sheet 2 may be a laminated film.
  • a laminated film the laminated film of the synthetic resin film layer and the fiber assembly layer provided in the surface by the side of the clothing is mentioned, for example.
  • the fiber assembly layer contains, for example, paper, nonwoven fabric or the like that is an assembly of hydrophilic fibers.
  • the nonwoven fabric used as the fiber assembly layer is preferably a tissue.
  • the tissue refers to a thin paper having a basis weight of 10 g / m 2 or more and 20 g / m 2 or less having wet strength with kraft pulp, rayon or the like as a main component.
  • the thickness of the fiber assembly layer is preferably 0.1 to 0.5 mm.
  • the fiber assembly layer can impart hydrophilicity and flexibility to the top sheet 2.
  • the tissue When a tissue is used for the fiber assembly layer, the tissue is cheaper than other papers and non-woven fabrics, and is easy to procure because it is widely available on the market. Although the strength of the tissue layer is low, the strength of the top sheet 2 is ensured by using it together with the synthetic resin film layer.
  • the back sheet 3 is provided on a surface that comes into contact with the user's clothes (underwear) for the purpose of preventing leakage of liquid excretion absorbed by the absorber 4.
  • the backsheet 3 preferably has moisture permeability in addition to liquid impermeability in order to reduce stuffiness when worn.
  • backsheet 3 examples include waterproof nonwoven fabric, synthetic resin (eg, polyethylene, polypropylene, polyethylene terephthalate, etc.) film, and composite sheet of nonwoven fabric and synthetic resin film (eg, nonwoven fabric such as spunbond and spunlace).
  • synthetic resin eg, polyethylene, polypropylene, polyethylene terephthalate, etc.
  • composite sheet of nonwoven fabric and synthetic resin film eg, nonwoven fabric such as spunbond and spunlace.
  • an SMS nonwoven fabric in which a melt-blown nonwoven fabric having high water resistance is sandwiched between strong spunbond nonwoven fabrics, and the like are used.
  • the absorber 4 has an absorbent material layer.
  • the absorptive material contained in the absorptive material layer is not particularly limited as long as it can absorb the user's liquid excreta.
  • Examples of the absorbent material include a water-absorbing fiber and a highly water-absorbing material (for example, a highly water-absorbing resin and a highly water-absorbing fiber).
  • the absorbent material layer may contain an antiblocking agent, an ultraviolet absorber, a thickening branching agent, a matting agent, a colorant, and other various improving agents.
  • water-absorbing fibers include wood pulp obtained from softwood or hardwood (for example, mechanical pulp such as groundwood pulp, refiner ground pulp, thermomechanical pulp, chemithermomechanical pulp; kraft pulp, sulfide pulp, alkaline pulp, etc. Chemical pulp; semi-chemical pulp, etc.]; mercerized pulp or crosslinked pulp obtained by subjecting wood pulp to chemical treatment; non-wood pulp such as bagasse, kenaf, bamboo, hemp, cotton (for example, cotton linter); rayon, fibril Examples include regenerated cellulose such as rayon; semi-synthetic cellulose such as acetate and triacetate, but pulverized pulp is preferred because it is low in cost and easy to mold.
  • wood pulp obtained from softwood or hardwood for example, mechanical pulp such as groundwood pulp, refiner ground pulp, thermomechanical pulp, chemithermomechanical pulp; kraft pulp, sulfide pulp, alkaline pulp, etc. Chemical pulp; semi-chemical pulp, etc.]; mercerized pulp or crosslinked pulp obtained by subjecting wood
  • the superabsorbent material examples include starch, cellulose, and synthetic polymer superabsorbent materials.
  • starch-based or cellulose-based superabsorbent materials include starch-acrylic acid (salt) graft copolymers, saponified starch-acrylonitrile copolymers, and crosslinked products of sodium carboxymethyl cellulose.
  • high water-absorbing materials include polyacrylates, polysulfonates, maleic anhydrides, polyacrylamides, polyvinyl alcohols, polyethylene oxides, polyaspartates, polyglutamates , Polyalginate-based, starch-based, cellulose-based superabsorbent resins (Superabsorbent® Polymer: SAP), etc., among which polyacrylate-based (especially sodium polyacrylate-based) superabsorbent Resins are preferred.
  • the shape of the superabsorbent material include particulates, fibers, and scales. In the case of particulates, the particle size is preferably 50 to 1000 ⁇ m, more preferably 100 to 600 ⁇ m. .
  • the amount of the superabsorbent material contained in the absorbent material layer can be appropriately changed according to the characteristics (for example, absorbency, light weight, etc.) that the sanitary napkin 1 should have. -50 mass%, preferably 3-30 mass%, more preferably 5-15 mass%.
  • the thickness, basis weight, density, and the like of the absorbent material layer can be appropriately changed according to characteristics (for example, absorbency, light weight, etc.) that the sanitary napkin 1 should have.
  • the thickness of the absorbent material layer is usually 1 to 20 mm, preferably 2 to 15 mm, more preferably 2 to 10 mm, and the basis weight is usually 100 to 1000 g / m 2 , preferably 150 to 700 g / m 2 , more preferably. Is 200 to 500 g / m 2 , and the density is usually 0.005 to 0.5 g / cm 3 , preferably 0.01 to 0.2 g / cm 3 , more preferably 0.01 to 0.1 g / cm 3 . 3 .
  • the thickness, basis weight, density, and the like of the absorbent material layer may change before and after the formation of the compressed grooves 5a, 5b (for example, the thickness of the absorbent material layer decreases, and the basis weight and density increase).
  • the absorber 4 may be covered with a covering material.
  • the covering material is not particularly limited as long as it has liquid permeability and absorber retention, but from the viewpoint of low cost and absorber retention, a tissue formed from a pulverized pulp as a main material by a wet method is preferable.
  • compressed grooves 5 a and 5 b are formed in the peripheral portions of the first region 20 a and the second region 20 b of the excrement supply region 20, respectively. .
  • the sanitary napkin 1 is easily and stably deformed starting from the compressed grooves 5a and 5b, and when the sanitary napkin 1 is deformed, the expansion of the bellows portion 210 and the elastic restoring force of the high rigidity region 22 are effectively generated. Excessive compression of the body 4 is effectively prevented, and bending of the top sheet 2 due to expansion of the bellows portion 210 is effectively prevented.
  • the compressed grooves 5a and 5b are formed by compressing and integrating the peripheral portions of the first region 20a and the second region 20b of the excrement supply region 20 and the absorber 4 by embossing using a heating roller, for example. It is formed.
  • the compressed grooves 5a and 5b are respectively formed on the entire periphery of the first region 20a and the second region 20b of the liquid supply region 20a.
  • the compressed grooves 5a and 5b may be formed in part of the peripheral portions of the first region 20a and the second region 20b of the liquid supply region 20a, respectively.
  • the absorbent body 4 has an absorbent body 4a located on the back sheet 3 side of the first region 20a of the excreta supply region 20 and a back sheet of the second region 20b of the excrement supply region 20 by the compressed grooves 5a and 5b. It is divided into an absorber 4b located on the 3 side. Since the thickness of the excrement supply area 20 is previously provided by the absorbent body 4a, and the convex deformation of the excrement supply area 20 can be induced stably by the compressed grooves 5a and 5b, the excrement supply area 20 for the user. The fit is improved. Since the absorbent body 4b has a higher density than the absorbent body 4a and can easily maintain rigidity even after excrement absorption, the entire sanitary napkin 1 after excretion absorption is prevented.
  • the sanitary napkin 1 exhibits the following functions and effects during torsional deformation. As shown in FIG. 4, when the sanitary napkin 1 is torsionally deformed, a regular twist starting from the region A 1-m or the region B 1-n of the high rigidity region 22 having higher rigidity than the low rigidity region 21. Deformation is possible. Further, even when the twisting direction changes (for example, when the wearer sitting on the chair reassembles his legs or when the wearer is walking), the region A 1-m of the high-rigidity region 22 or Regular torsional deformation starting from the region B 1-n is possible. Furthermore, the sanitary napkin 1 that has been twisted and deformed is easily restored to the original shape by the elastic restoring force of the high-rigidity region 22.
  • the sanitary napkin 1 is sandwiched between the user's inner thighs, bent at the excrement supply area 20 of the top sheet 2, and has the following functions and effects when convexly deformed toward the excrement supply area 20 side. Demonstrate. As shown in FIG. 5, when the sanitary napkin 1 is convexly deformed, the bellows portion 210 extends, so that the absorbent body 4 is less likely to be pressed by the liquid supply region 20, resulting from the deformation of the sanitary napkin 1. Excessive compression of the absorbent body 4 and accompanying rewet are prevented.
  • the angle at which the sanitary napkin 1 is bent becomes an acute angle or an obtuse angle.
  • the top sheet 2 easily follows the deformation of the sanitary napkin 1 due to the elastic restoring force of the high-rigidity region 22, the top sheet 2 is prevented from being bent due to the expansion of the bellows part 210.
  • a blood modifying agent is applied to the surface of the top sheet 2 of the sanitary napkin 1. Since the viscosity and surface tension of menstrual blood discharged to the top sheet 2 are lowered by the blood modifying agent, the menstrual blood quickly moves from the top sheet 2 to the absorber 4 and is absorbed by the absorber 4. By improving the menstrual blood absorption rate of the absorbent body 4, it becomes difficult for highly viscous menstrual blood to remain on the top sheet 2, so that the stickiness of the top sheet 2 is reduced and the surface dryness of the top sheet 2 is improved. The wearer is less likely to feel visually uncomfortable. Furthermore, leakage of menstrual blood discharged to the top sheet 2 from the width direction side of the sanitary napkin 1 is prevented.
  • the region to which the blood modifying agent is applied may be the entire surface of the top sheet 2 or a part thereof, but it may include at least a region that contacts the excretion opening (vaginal opening) of the user. preferable.
  • the blood modifying agent is preferably attached to the top sheet 2 in the form of droplets or particles so as not to block the liquid permeation holes of the top sheet 2.
  • the coating weight of the blood modifying agent on the top sheet 2 is preferably 1 to 30 g / m 2 , more preferably 3 to 10 g / m 2 . If the coating weight of the blood modifying agent is less than 1 g / m 2 , it may be difficult to stably apply the blood modifying agent to the top sheet 2, and the coating weight of the blood modifying agent is 30 g / m 2. When it is larger than m 2 , the top sheet 2 may be slimy.
  • a method for applying the blood modifying agent for example, after heating to a desired temperature, a method using a contact coater such as a slot coater, a non-contact coater such as a spray coater, curtain coater or spiral coater is used. Can be mentioned.
  • a coating method using a non-contact coater is preferable from the viewpoint that the blood modifying agent in the form of droplets can be uniformly dispersed in the top sheet 2 and the top sheet 2 is not damaged.
  • the time point at which the blood modifying agent is applied to the top sheet 2 is not particularly limited, it is preferable to apply the blood modifying agent to the top sheet 2 in the manufacturing process of the sanitary napkin 1 from the viewpoint of suppressing capital investment.
  • the blood modifying agent is applied to the top sheet 2 in the manufacturing process of the sanitary napkin 1 in a process close to the final process from the viewpoint of suppressing reduction of the blood modifying agent. It is preferable.
  • the blood modifying agent may be applied to the top sheet 2 immediately before the packaging process of the sanitary napkin 1.
  • a region of the top sheet 2 to which the blood modifying agent is applied may be coated with a hydrophilic agent, a water repellent, or the like, or hydrophilicity may be imparted by corona treatment, plasma treatment, or the like.
  • a hydrophilic agent a water repellent, or the like
  • hydrophilicity may be imparted by corona treatment, plasma treatment, or the like.
  • a method for manufacturing an absorbent article will be described using a method for manufacturing a sanitary napkin as an example.
  • the manufacturing method which concerns on this embodiment is the process (process 1A) which forms the absorber 4, the process (process 2A) which laminates
  • a manufacturing apparatus 100 shown in FIG. 6 is used.
  • Step 1A On the peripheral surface of the suction drum 120 rotating in the machine direction MD, recesses 124 are formed at a required pitch in the circumferential direction as a mold for filling the absorbent material 122.
  • the suction unit 126 acts on the recess 124, and the absorbent material 122 supplied from the material supply unit 121 is vacuum sucked into the recess 124.
  • the material supply unit 121 is formed so as to cover the suction drum 120, and the material supply unit 121 supplies the absorber material 122 to the recess 124 by air conveyance, and the absorber 4 is formed in the recess 124.
  • the absorber 4 formed in the recess 124 is transferred onto the carrier sheet 110 that proceeds in the machine direction MD.
  • Step 2A The top sheet 2 is laminated on the absorber 4 to form a laminate 262.
  • the manufacturing method of the top sheet 2 is mentioned later.
  • Step 3A When the laminated body 262 passes between the upper roll 131 and the lower roll 132 of the embossing apparatus 130, a compressed groove is formed in the laminated body 262.
  • a convex portion (not shown) having a shape corresponding to the compressed groove is provided on the outer peripheral surface of the upper roll 131.
  • the lower roll 132 is a plain roll having a smooth outer peripheral surface.
  • the squeezing grooves 5a and 5b are formed in the peripheral portions of the excretion opening contact area 20a and the surrounding area 20b, respectively, of the top sheet 2, and the excretion opening contacting area 20a and the surrounding area are formed by the formation of the pressing grooves 5a and 5b.
  • the peripheral portion of 20b is integrated with the absorber 4.
  • Step 4A The back sheet 3 supplied from the back sheet roll 140 is laminated on the lower surface (opposite side of the top sheet) of the laminated body 134 in which the compressed grooves are formed via an adhesive layer, and the sanitary napkin 1 A continuous body 144 is formed.
  • Step 5A The continuous body 144 of the sanitary napkin 1 is cut using the cutter 150, and the sanitary napkin 1 is cut out.
  • Step 6A The blood modifying agent 161 is applied to the central region of the sanitary napkin 1 using the blood modifying agent application spray 160 to form a blood modifying agent layer on the surface of the top sheet 2.
  • the blood modifying agent layer is formed at least in the excretion opening contact area 20a in the excretion opening contact area 20a of the top sheet 2.
  • the blood modifying agent is applied after the sanitary napkin 1 is cut out, but may be applied at any stage before cutting out, or may be applied in the manufacturing process of the top sheet 2 described later. Good. In order to prevent the blood modifying agent applied during production from flowing down, it is preferable to apply the blood modifying agent downstream of the production process, for example, immediately before packaging the sanitary napkin 1.
  • the manufacturing method of the sanitary napkin 1 includes, in addition to steps 1A to 6A, a step of forming seal portion seal portions 7a, 7b, 8a and 8b, a step of forming adhesive portions 9a, 9b and 9c, and the like.
  • Step 1B As shown in FIG. 6, the synthetic resin film sheet 212 supplied from the roll 210 passes through the recess forming roll 220, and a recess 2141 is formed in the synthetic resin film sheet 212 (see FIG. 8).
  • the recess forming roll 220 includes a knurled roll 221 and a preheating roll 222 having a smooth surface.
  • FIGS. 7A and 7B are diagrams showing an example of the knurled roll 221.
  • FIG. 7A is a diagram showing the entire knurled roll 221
  • FIG. 7B is an enlarged view of a portion 223 having irregularities on the outer peripheral surface of the knurled roll 221.
  • FIG.7 (c) is a figure which shows an example of the preheating roll 222 which has a smooth surface.
  • grid-like convex portions 224 are provided on the surface 223 of the knurled roll 221.
  • a diamond-shaped recess 225 is formed on the surface of the knurled roll 221.
  • the shape of the recess 225 of the knurled roll 221 is not limited to a rhombus, and may be a square, a rectangle, a parallelogram, a trapezoid, a triangle, a hexagon, or the like.
  • the interval between the center lines of the protrusions 224 arranged in parallel in the lattice-like protrusions 224, that is, the pitch of the lattice-like protrusions 224 is preferably 0.2 to 10 mm, more preferably 0.4 to 2 mm.
  • the width of the grid-like convex portion 224 is preferably 0.01 to 1 mm, more preferably 0.03 to 0.1 mm.
  • the length of one side of the diamond-shaped recess 225 is preferably 0.1 to 5 mm, more preferably 0.2 to 1 mm. These ranges are preferable in terms of improving the formability of the recesses in the synthetic resin film sheet.
  • the preheating roll 222 having a smooth surface is maintained at a temperature of 70 ° C. to 100 ° C., and heats the supplied synthetic resin film sheet 212. Thereby, the synthetic resin film sheet 212 becomes soft and easy to mold.
  • the synthetic resin film sheet 212 passes between the rolls 221 and 222, a portion of the synthetic resin film sheet 212 that is in contact with the lattice-shaped convex portions 224 receives a strong pressure in the thickness direction. Thereby, as shown in FIG. 8, fine concave portions 2141 are formed in the synthetic resin film sheet 214.
  • the recessed part 2141 actually formed in the synthetic resin film sheet 212 is smaller than that shown in FIG. 8, and the number of recessed parts 2141 per unit area is larger than that shown in FIG.
  • the recess 2141 is formed in a region 2143 corresponding to the central region of the sanitary napkin 1 in the synthetic resin film sheet 214.
  • a region corresponding to the sanitary napkin 1 is a region indicated by a dotted line 2142.
  • Step 2B By passing the synthetic resin film sheet 214 formed with the recesses through the stretched gear roll 230, the region corresponding to the low-rigidity region 21 of the top sheet 2 in the synthetic resin film sheet 214 is bent, and the bellows portion 210 is formed.
  • a synthetic resin film sheet 216 is produced.
  • the bellows portion 210 extends in the machine direction (MD) and is arranged in parallel in the width direction, and the cross-sectional shape along the width direction is combined with a substantially U-shaped curve. Wavy.
  • the bellows portion 210 extending in the machine direction is interrupted at a plurality of locations. That is, in the synthetic resin film sheet 216, the bellows portion 210 is formed discontinuously, and the synthetic resin film sheet 214 is not bent at the discontinuous portion. This discontinuous portion corresponds to the high rigidity region 22 of the top sheet 2.
  • the stretching gear roll 230 includes an upper roll 231 and a lower roll 232.
  • 9A is a view for explaining the upper roll 231 of the stretched gear roll 230
  • FIG. 9B is a view for explaining the gear teeth 233 arranged on the outer peripheral surface of the upper roll 231.
  • FIG. 9C is a cross-sectional view taken along the line BB of FIG. 9B.
  • the gear teeth 233 extend discontinuously in the circumferential direction of the upper roll 231. That is, the gear teeth 233 extending in the circumferential direction of the upper roll 231 are interrupted at a plurality of locations on the way.
  • a discontinuous portion corresponding to the high rigidity region 22 of the top sheet 2 is formed by the portion 234 where the gear teeth 233 are interrupted.
  • the portions 234 where the gear teeth 233 are interrupted are arranged so as to be aligned on a straight line in an oblique direction with respect to the direction in which the gear teeth 233 extend.
  • the width of the gear teeth 233 is, for example, 0.3 to 0.5 mm, and the distance between the centers of the adjacent gear teeth 233 is, for example, 1.0 to 1.2 mm.
  • FIG. 10A is a diagram for explaining the lower roll 232 of the stretched gear roll 230
  • FIG. 10B is a diagram for explaining the gear teeth 235 arranged on the outer peripheral surface of the lower roll 232
  • FIG. 10C is a cross-sectional view taken along the line CC of FIG. 10B.
  • the gear teeth 235 extend in the circumferential direction of the lower roll 232.
  • the lower roll 232 is not interrupted at a plurality of locations on the way like the upper roll 231.
  • the width of the gear teeth 235 is, for example, equal to the width of the gear teeth 233 of the upper roll 231, and the distance between the centers of the adjacent gear teeth 235 is, for example, equal to the distance between the centers of the gear teeth 233 of the upper roll 231.
  • the length in the radial direction of the upper roll 231 at the portion where the gear teeth 233 of the upper roll 231 and the gear teeth 235 of the lower roll 232 are meshed, that is, the biting depth is, for example, 1.25 mm.
  • the region 2143 (see FIG. 8) where the concave portion 2141 of the synthetic resin film sheet 214 is formed is formed in the liquid permeable hole 26 (see FIG. 3) of the top sheet 2. A corresponding opening is formed.
  • the synthetic resin film sheet 214 is greatly stretched at a portion 236 where the gear teeth 233 of the upper roll 231 and the gear teeth 235 of the lower roll 232 are engaged.
  • the portion where the concave portion 2141 (see FIG. 8) is formed in the concave portion forming step described above is a portion where the synthetic resin film sheet 214 is thin and further damaged by the grid-shaped convex portions 224 of the knurled roll 221. Therefore, the strength is weak, and the concave portion 2141 of the synthetic resin film sheet 214 is broken when it is stretched. Therefore, in the portion 236 that has been stretched by the synthetic resin film sheet 214, the concave portion 2141 of the synthetic resin film sheet 214 is torn, and the torn portion of the synthetic resin film sheet 214 is widened to form an opening.
  • the synthetic resin film sheet 214 is not stretched so much at the portions 237 and 238 where the gear teeth 233 of the upper roll 231 and the gear teeth 235 of the lower roll 232 are not engaged. For this reason, even if the synthetic resin film sheet 214 passes through the stretched gear roll 230 in the portions 237 and 238 where the gear teeth 233 of the upper roll 231 and the gear teeth 235 of the lower roll 232 in the synthetic resin film sheet 214 do not mesh with each other,
  • the recess 2141 formed in the above-described recess forming step is not torn and does not become an opening.
  • the blood modifying agent of the present invention has an IOB of about 0.00 to about 0.60, a melting point of about 45 ° C. or less, and a water solubility of about 0.00 to about 0.05 g with respect to 100 g of water at 25 ° C. Is a blood modifying agent.
  • IOB Inorganic Organic Balance
  • IOB Organic Organic Balance
  • inorganic value calculated by inorganic value / organic value.
  • the inorganic value and the organic value are shown in the field of Vol. 11, no. 10 (1957) p. 719-725).
  • Table 1 summarizes the organic and inorganic values of the major groups by Mr. Fujita.
  • the IOB is about 0.00 to about 0.60, preferably about 0.00 to about 0.50, preferably about 0.00 to about 0.40. More preferably, it is even more preferably from about 0 to about 0.30. It is considered that the lower the IOB, the higher the organicity and the higher the affinity with blood cells.
  • melting point means a peak top temperature of an endothermic peak when changing from a solid state to a liquid state when measured with a differential scanning calorimeter at a heating rate of 10 ° C./min.
  • the melting point can be measured using, for example, a DSC-60 type DSC measuring apparatus manufactured by Shimadzu Corporation.
  • the blood modifying agent of the present invention may be liquid at room temperature or a solid as long as it has a melting point of about 45 ° C. or lower, that is, a melting point of about 25 ° C. or higher, or about 25 ° C. And can have a melting point of, for example, about ⁇ 5 ° C., about ⁇ 20 ° C., and the like. The reason why the melting point of the blood modifying agent of the present invention is about 45 ° C. or less will be described later.
  • the blood modifying agent of the present invention has a lower melting point, but preferably has a low vapor pressure.
  • the vapor pressure of the blood modifying agent of the present invention is preferably about 0 to about 200 Pa, more preferably about 0 to about 100 Pa at 25 ° C. (1 atm), and about 0 to about 10 Pa. Is more preferably from about 0 to about 1 Pa, and even more preferably from about 0.0 to about 0.1 Pa.
  • the vapor pressure is preferably about 0 to about 700 Pa at 40 ° C.
  • (1 atm) more preferably about 0 to about 100 Pa, about It is even more preferably 0 to about 10 Pa, even more preferably about 0 to about 1 Pa, and even more preferably about 0.0 to about 0.1 Pa. If the vapor pressure is high, vaporization may occur during storage, and problems such as a decrease in the amount of blood modifying agent and odor when worn may occur.
  • the melting point of the blood modifying agent of the present invention can be properly used according to the climate, the length of wearing time, and the like. For example, in an area where the average temperature is about 10 ° C. or less, even when the menstrual blood is excreted and then cooled by the ambient temperature by adopting a blood modifying agent having a melting point of about 10 ° C. or less. It is considered that the blood modifying agent can stably modify blood.
  • the melting point of the blood modifying agent of the present invention is preferably higher in the range of 45 ° C. or lower. This is because the blood modifying agent is difficult to move even when it is worn for a long time, and is hardly affected by sweat, friction at the time of wearing, and the like.
  • the water solubility of 0.00-0.05 g was obtained by adding 0.05 g of sample to 100 g of deionized water at 25 ° C., leaving it to stand for 24 hours, and after 24 hours, gently stirring as necessary. Then, it can be measured by visually evaluating whether or not the sample is dissolved.
  • dissolution includes a case where the sample is completely dissolved in deionized water to form a uniform mixture and a case where the sample is completely emulsified. “Complete” means that there is no lump of sample in deionized water.
  • top sheet is coated with a surfactant for the purpose of changing blood surface tension and the like to absorb blood rapidly.
  • surfactants generally have high water solubility
  • top sheets coated with surfactants are well-suited to hydrophilic components (blood plasma, etc.) in blood, but rather leave blood on the top sheet.
  • the blood modifying agent of the present invention has low water solubility, unlike a conventionally known surfactant, it is considered that blood can be quickly transferred to an absorber without remaining in the top sheet.
  • solubility in 100 g of water at 25 ° C. may be simply referred to as “water solubility”.
  • a weight average molecular weight means the value of polystyrene conversion calculated
  • GPC measurement conditions include the following. Model: Hitachi High-Technologies Corporation High-Performance Liquid Chromatogram Lachrom Elite Column: SHODEX KF-801, KF-803 and KF-804 manufactured by Showa Denko K.K. Eluent: THF Flow rate: 1.0 mL / min Driving amount: 100 ⁇ L Detection: RI (differential refractometer)
  • the weight average molecular weight described in the Example of this specification is measured on the said conditions.
  • the blood modifying agent of the present invention is preferably the following (i) to (iii), (I) hydrocarbons, (Ii) from (ii-1) a hydrocarbon moiety and (ii-2) a carbonyl group (—CO—) and an oxy group (—O—) inserted between the CC single bonds of the hydrocarbon moiety.
  • the hydrocarbon moiety A compound having one or a plurality of the same or different groups selected from the group consisting of a carboxyl group (—COOH) and a hydroxyl group (—OH), which replaces a hydrogen atom; As well as any combination thereof.
  • hydrocarbon means a compound composed of carbon and hydrogen, and a chain hydrocarbon, for example, a paraffinic hydrocarbon (also referred to as an alkane, which does not include a double bond and a triple bond).
  • a paraffinic hydrocarbon also referred to as an alkane, which does not include a double bond and a triple bond.
  • Olefinic hydrocarbons including one double bond, also referred to as alkene
  • acetylenic hydrocarbons including one triple bond, also referred to as alkyne
  • hydrocarbons containing two or more bonds selected from the above and cyclic hydrocarbons such as aromatic hydrocarbons and alicyclic hydrocarbons.
  • the hydrocarbon is preferably a chain hydrocarbon and an alicyclic hydrocarbon, more preferably a chain hydrocarbon, a paraffinic hydrocarbon, an olefinic hydrocarbon, and two double bonds. More preferred are hydrocarbons (not including triple bonds), and more preferred are paraffinic hydrocarbons.
  • the chain hydrocarbon includes a straight chain hydrocarbon and a branched chain hydrocarbon.
  • each oxy group (—O—) is not adjacent. Therefore, the compounds (ii) and (iii) do not include compounds having a continuous oxy group (so-called peroxides).
  • At least one hydrogen atom in the hydrocarbon moiety is more than a hydroxyl group (-) than in a compound in which at least one hydrogen atom in the hydrocarbon moiety is substituted with a carboxyl group (-COOH).
  • Compounds substituted with OH) are preferred.
  • Table 1 since the carboxyl group binds to menstrual metals and the like, and the inorganic value increases significantly from 150 to 400 or more, the blood modifying agent having a carboxyl group is used at the time of use. This is because the value of IOB exceeds about 0.60, and the affinity with blood cells may be reduced.
  • the blood modifying agent of the present invention includes the following (i ′) to (iii ′): (I ′) hydrocarbon, (Ii ′) (ii′-1) a hydrocarbon moiety and (ii′-2) a carbonyl bond (—CO—), an ester bond (—COO) inserted between the C—C single bonds of the hydrocarbon moiety.
  • the blood modifying agent of the present invention more preferably has about 1.8 or less carbonyl bonds (—CO—) and two ester bonds (—COO—) per 10 carbon atoms in the hydrocarbon moiety.
  • —CO— carbonyl bonds
  • —COO— ester bonds
  • the blood modifying agent of the present invention is more preferably the following (A) to (F), (A) (A1) a compound having a chain hydrocarbon moiety and 2 to 4 hydroxyl groups replacing hydrogen atoms in the chain hydrocarbon moiety, (A2) a chain hydrocarbon moiety, and the chain An ester with a compound having one carboxyl group for substituting a hydrogen atom in the hydrocarbon moiety, (B) (B1) a compound having a chain hydrocarbon moiety and 2 to 4 hydroxyl groups replacing hydrogen atoms in the chain hydrocarbon moiety, (B2) a chain hydrocarbon moiety, and the chain An ether with a compound having one hydroxyl group replacing a hydrogen atom of the hydrocarbon moiety, (C) (C1) a carboxylic acid, a hydroxy acid, an alkoxy acid or an oxo acid containing a chain hydrocarbon moiety and 2 to 4 carboxyl groups replacing a hydrogen atom in the chain hydrocarbon moiety; C2) an ester of a compound having a
  • (A1) A compound having a chain hydrocarbon moiety and 2 to 4 hydroxyl groups replacing hydrogen atoms in the chain hydrocarbon moiety (hereinafter sometimes referred to as “compound (A1)”)
  • a chain hydrocarbon tetraol such as an alkanetetraol, such as pentaerythritol
  • a chain hydrocarbon triol such as an alkanetriol, such as glycerine
  • a chain hydrocarbon diol such as an alkanediol, such as, for example, Glycol.
  • Examples of the compound (A2) having a chain hydrocarbon moiety and one carboxyl group that replaces the hydrogen atom of the chain hydrocarbon moiety include: , Compounds in which one hydrogen atom on a hydrocarbon is substituted with one carboxyl group (—COOH), for example, fatty acids.
  • Examples of the compound (A) include (a 1 ) an ester of a chain hydrocarbon tetraol and at least one fatty acid, (a 2 ) an ester of a chain hydrocarbon triol and at least one fatty acid, and (a 3 ) Esters of chain hydrocarbon diols with at least one fatty acid.
  • ester of (a 1 ) chain hydrocarbon tetraol and at least one fatty acid examples include the following formula (1): Tetraesters of pentaerythritol and fatty acids of the following formula (2): Triesters of pentaerythritol and fatty acids of the following formula (3): Diester of pentaerythritol and fatty acid of the following formula (4): And monoesters of pentaerythritol and fatty acids. (Wherein R 1 to R 4 are each a chain hydrocarbon)
  • the ester of pentaerythritol and fatty acid has the above-mentioned IOB, melting point and water solubility.
  • a saturated fatty acid for example, a C 2 to C 30 saturated fatty acid, for example, acetic acid (C 2 ) (C 2 represents the number of carbon atoms, R 1 C, R 2 C, R 3 C or R 4 C, the same applies hereinafter), propanoic acid (C 3 ), butanoic acid (C 4 ) and isomers thereof such as 2-methylpropanoic acid (C 4 ), Pentanoic acid (C 5 ) and isomers thereof such as 2-methylbutanoic acid (C 5 ), 2,2-dimethylpropanoic acid (C 5 ), hexanoic acid (C 6 ), heptanoic acid (C 7 ), octanoic acid (C 8) Beauty isomers thereof, e.g., 2-ethylhexanoic acid (C 8), nonanoic acid (C 9), decanoic acid (C 10), dode
  • the fatty acid can also be an unsaturated fatty acid.
  • unsaturated fatty acid include C 3 to C 20 unsaturated fatty acids such as monounsaturated fatty acids such as crotonic acid (C 4 ), myristoleic acid (C 14 ), palmitoleic acid (C 16 ), Oleic acid (C 18 ), elaidic acid (C 18 ), vaccenic acid (C 18 ), gadoleic acid (C 20 ), eicosenoic acid (C 20 ), etc., diunsaturated fatty acids such as linoleic acid (C 18 ), Triunsaturated fatty acids such as eicosadienoic acid (C 20 ), such as linolenic acid, such as ⁇ -linolenic acid (C 18 ) and ⁇ -linolenic acid (C 18 ), pinolenic acid (C 18 ), eleostearic acid, For example, ⁇ -eleostearic acid (C
  • the ester of pentaerythritol and fatty acid is an ester of pentaerythritol and a fatty acid derived from a saturated fatty acid, that is, an ester of pentaerythritol and a saturated fatty acid, considering the possibility of modification by oxidation or the like. preferable.
  • the ester of pentaerythritol and fatty acid is preferably a diester, triester or tetraester, more preferably a triester or tetraester, in order to reduce IOB and make it more hydrophobic. And tetraesters are more preferred.
  • the total number of carbon atoms of the fatty acid constituting the tetraester of pentaerythritol and fatty acid that is, in the above formula (1), R 1 C, R 2 C, R 3 C and When the total number of carbon atoms in the R 4 C portion is 15, IOB is 0.60. Therefore, in the tetraester of pentaerythritol and fatty acid, the IOB satisfies the requirement of about 0.00 to about 0.60 when the total number of carbons is about 15 or more.
  • tetraester of pentaerythritol and fatty acid for example, pentaerythritol, hexanoic acid (C 6 ), heptanoic acid (C 7 ), octanoic acid (C 8 ), for example, 2-ethylhexanoic acid (C 8 ), And tetraesters with nonanoic acid (C 9 ), decanoic acid (C 10 ) and / or dodecanoic acid (C 12 ).
  • the total number of carbon atoms of the fatty acid constituting the triester of pentaerythritol and fatty acid that is, in the above formula (2), R 1 C, R 2 C and R 3 C moieties
  • the IOB satisfies the requirement of about 0.00 to about 0.60 when the total number of carbon atoms of the fatty acid is about 19 or more.
  • the total number of carbon atoms of the fatty acid constituting the diester of pentaerythritol and fatty acid that is, the total number of carbon atoms of the R 1 C and R 2 C moieties in the above formula (3) is In the case of 22, the IOB is 0.59. Therefore, in the diester of pentaerythritol and fatty acid, the IOB satisfies the requirement of about 0.00 to about 0.60 when the total number of carbon atoms of the fatty acid is about 22 or more.
  • the number of carbons of the fatty acid constituting the monoester of pentaerythritol and fatty acid that is, in the above formula (4), the IOB is 25 when the carbon number of the R 1 C portion is 25. 0.60. Therefore, in the monoester of pentaerythritol and fatty acid, the IOB satisfies the requirement of about 0.00 to about 0.60 when the number of carbon atoms of the fatty acid is about 25 or more. In the above calculation, the influence of double bond, triple bond, iso branch, and tert branch is not taken into consideration.
  • esters of pentaerythritol and fatty acids examples include Unistar H-408BRS, H-2408BRS-22 (mixed product) and the like (manufactured by NOF Corporation).
  • ester of (a 2 ) chain hydrocarbon triol and at least one fatty acid examples include the following formula (5): Triester of glycerin and fatty acid of the following formula (6): Diesters of glycerin and fatty acids and the following formula (7): (Wherein R 5 to R 7 are each a chain hydrocarbon) Monoester of glycerin and fatty acid.
  • the ester of the glycerin and the fatty acid constituting the ester of the glycerin and the fatty acid, as long as the ester of the glycerin and the fatty acid satisfies the requirements for the IOB, melting point and water solubility,
  • the fatty acids listed in “Ester of (a 1 ) chain hydrocarbon tetraol and at least one fatty acid”, that is, saturated fatty acids and unsaturated fatty acids, and the like are modified by oxidation or the like.
  • it is preferable to use an ester of glycerin and a fatty acid derived from a saturated fatty acid that is, an ester of glycerin and a saturated fatty acid.
  • ester of glycerin and fatty acid is preferably a diester or triester, and more preferably a triester, in order to reduce IOB and make it more hydrophobic.
  • the triester of glycerin and a fatty acid is also referred to as a triglyceride.
  • triester of glycerin and octanoic acid C 8
  • triester of glycerin and decanoic acid C 10
  • glycerin and dodecanoic acid C 12
  • triesters of glycerin and 2 or 3 fatty acids and mixtures thereof.
  • Examples of the triesters of glycerin and two or more fatty acids include triesters of glycerin and octanoic acid (C 8 ) and decanoic acid (C 10 ), glycerin, octanoic acid (C 8 ), and decane.
  • Examples thereof include triesters with (C 16 ) and octadecanoic acid (C 18 ).
  • the total number of carbon atoms of the fatty acid constituting the triester of glycerin and fatty acid that is, R 5 C in formula (5) in order to make the melting point about 45 ° C. or less.
  • R 6 C and R 7 C moieties preferably have a total carbon number of about 40 or less.
  • the total number of carbon atoms of the fatty acid constituting the triester of glycerin and fatty acid that is, in the formula (5), R 5 C, R 6 C and R 7 C moieties.
  • the IOB is 0.60. Therefore, in the triester of glycerin and fatty acid, the IOB satisfies the requirement of about 0.00 to about 0.60 when the total number of carbon atoms of the fatty acid is about 12 or more.
  • the triester of glycerin and a fatty acid is a so-called fat and is a component that can constitute a human body, and thus is preferable from the viewpoint of safety.
  • triesters of glycerin and fatty acids include tricoconut oil fatty acid glyceride, NA36, panacet 800, panacet 800B and panacet 810S, and tri-C2L oil fatty acid glyceride and tri-CL oil fatty acid glyceride (above, manufactured by NOF Corporation). ) And the like.
  • the diester of glycerin and fatty acid is also called diglyceride.
  • diester of glycerin and decanoic acid (C 10 ) diester of glycerin and dodecanoic acid (C 12 ), glycerin and hexadecanoic acid (C 16 ) Examples include diesters, diesters of glycerin and two fatty acids, and mixtures thereof.
  • the total number of carbon atoms of the fatty acid constituting the diester of glycerin and fatty acid that is, the total number of carbon atoms of the R 5 C and R 6 C moieties in the formula (6) is 16.
  • the IOB is 0.58. Accordingly, in the diester of glycerin and fatty acid, the IOB satisfies the requirement of about 0.00 to about 0.60 when the total number of carbon atoms of the fatty acid is about 16 or more.
  • the monoester of the glycerin and the fatty acid is also referred to as a monoglyceride, and examples thereof include glycerin icosanoic acid (C 20 ) monoester, glycerin docosanoic acid (C 22 ) monoester, and the like.
  • the monoester of glycerin and fatty acid the number of carbon atoms of the fatty acid constituting the monoester of glycerin and fatty acid, that is, when the carbon number of the R 5 C moiety in the formula (7) is 19, the IOB is 0.59. It becomes. Therefore, in the monoester of glycerin and fatty acid, when the carbon number of the fatty acid is about 19 or more, the IOB satisfies the requirement of about 0.00 to about 0.60.
  • ester of (a 3 ) chain hydrocarbon diol and at least one fatty acid examples include C 2 to C 6 chain hydrocarbon diols such as C 2 to C 6 glycols such as ethylene glycol, propylene glycol, butylene. Examples thereof include monoesters or diesters of glycol, pentylene glycol or hexylene glycol and a fatty acid.
  • ester of the chain hydrocarbon diol and at least one fatty acid for example, the following formula (8): R 8 COOC k H 2k OCOR 9 (8) (Wherein k is an integer from 2 to 6 and R 8 and R 9 are each a chain hydrocarbon) A diester of a C 2 -C 6 glycol with a fatty acid and the following formula (9): R 8 COOC k H 2k OH (9) (Wherein k is an integer from 2 to 6 and R 8 is a chain hydrocarbon) And monoesters of C 2 -C 6 glycols and fatty acids.
  • the fatty acid to be esterified (corresponding to R 8 COOH and R 9 COOH in formula (8) and formula (9)) is C 2 -C 6 glycol.
  • an ester of a fatty acid satisfying the above requirements of IOB, melting point and water solubility for example, “(a 1 ) ester of chain hydrocarbon tetraol and at least one fatty acid”
  • the fatty acids listed in the above that is, saturated fatty acids and unsaturated fatty acids are mentioned, and saturated fatty acids are preferred in consideration of the possibility of modification by oxidation or the like.
  • the ester of a C 2 ⁇ C 6 glycols and fatty acid in view of the potential for degradation by oxidation and the like, derived from saturated fatty acids, esters of C 2 ⁇ C 6 glycols and fatty acid, Nachi Suwa, C 2 An ester of ⁇ C 6 glycol and saturated fatty acid is preferred.
  • the ester of C 2 -C 6 glycol and fatty acid is an ester of glycol and fatty acid derived from glycol having a large carbon number, for example, butylene glycol, in order to reduce IOB and make it more hydrophobic.
  • An ester of glycol and fatty acid derived from pentylene glycol or hexylene glycol is preferable.
  • ester of C 2 -C 6 glycol and fatty acid is preferably a diester in order to reduce IOB and make it more hydrophobic.
  • examples of commercial products of the ester of C 2 -C 6 glycol and fatty acid include Compol BL and Compol BS (manufactured by NOF Corporation).
  • Compound (B1) Compounds having a chain hydrocarbon moiety and 2 to 4 hydroxyl groups replacing hydrogen atoms in the chain hydrocarbon moiety are listed as “Compound (A)” as Compound (A1). For example, pentaerythritol, glycerin, and glycol.
  • Examples of the compound (B2) having a chain hydrocarbon moiety and one hydroxyl group replacing the hydrogen atom of the chain hydrocarbon moiety include: , Compounds in which one hydrogen atom of a hydrocarbon is replaced by one hydroxyl group (—OH), for example, aliphatic monohydric alcohols, for example, saturated aliphatic monohydric alcohols and unsaturated aliphatic monohydric alcohols Is mentioned.
  • saturated aliphatic monohydric alcohol examples include C 1 to C 20 saturated aliphatic monohydric alcohols such as methyl alcohol (C 1 ) (C 1 represents the number of carbon atoms, the same shall apply hereinafter), ethyl alcohol ( C 2 ), propyl alcohol (C 3 ) and isomers thereof such as isopropyl alcohol (C 3 ), butyl alcohol (C 4 ) and isomers thereof such as sec-butyl alcohol (C 4 ) and tert-butyl alcohol (C 4 ), pentyl alcohol (C 5 ), hexyl alcohol (C 6 ), heptyl alcohol (C 7 ), octyl alcohol (C 8 ) and isomers thereof such as 2-ethylhexyl alcohol (C 8 ), nonyl alcohol (C 9), decyl alcohol (C 10), dodecyl alcohol (C 12), tetradecyl alcohol (C 14), Hexadecyl alcohol (C 16), to
  • Examples of the unsaturated aliphatic monohydric alcohol include those obtained by substituting one of the C—C single bonds of the saturated aliphatic monohydric alcohol with a C ⁇ C double bond, such as oleyl alcohol. It is commercially available from Shin Nippon Rika Co., Ltd. under the names of the Jamaica Coal series and the Angelo All series.
  • Examples of the compound (B) include (b 1 ) ethers of chain hydrocarbon tetraol and at least one aliphatic monohydric alcohol, such as monoether, diether, triether and tetraether, preferably diether, triether.
  • Ethers and tetraethers more preferably triethers and tetraethers, and even more preferably tetraethers, ethers of (b 2 ) chain hydrocarbon triols and at least one aliphatic monohydric alcohol, such as monoethers, diethers and Triethers, preferably diethers and triethers, and more preferably triethers, and (b 3 ) ethers of chain hydrocarbon diols with at least one aliphatic monohydric alcohol, such as monoethers and diethers, and preferably Diether It is below.
  • Examples of the ether of the chain hydrocarbon tetraol and at least one aliphatic monohydric alcohol include, for example, the following formulas (10) to (13): (In the formula, R 10 to R 13 are each a chain hydrocarbon.) And tetraethers, triethers, diethers and monoethers of pentaerythritol and aliphatic monohydric alcohols.
  • Examples of the ether of the chain hydrocarbon triol and at least one aliphatic monohydric alcohol include, for example, the following formulas (14) to (16): (Wherein R 14 to R 16 are each a chain hydrocarbon.) And triether, diether and monoether of glycerin and aliphatic monohydric alcohol.
  • Examples of the ether of the chain hydrocarbon diol and at least one aliphatic monohydric alcohol include the following formula (17): R 17 OC n H 2n OR 18 (17) (Wherein n is an integer from 2 to 6 and R 17 and R 18 are each a chain hydrocarbon) A diether of a C 2 -C 6 glycol and an aliphatic monohydric alcohol, and the following formula (18): R 17 OC n H 2n OH (18) (Wherein n is an integer from 2 to 6 and R 17 is a chain hydrocarbon) And monoethers of C 2 -C 6 glycols and aliphatic monohydric alcohols.
  • the total number of carbon atoms of the aliphatic monohydric alcohol constituting the tetraether of pentaerythritol and aliphatic monohydric alcohol that is, in the above formula (10)
  • the IOB is 0.44. Therefore, in the tetraether of pentaerythritol and aliphatic monohydric alcohol, when the total number of carbon atoms of the aliphatic monohydric alcohol is about 4 or more, the IOB is about 0.00 to about 0.60. Fulfill.
  • the triether of pentaerythritol and aliphatic monohydric alcohol the total number of carbon atoms of the aliphatic monohydric alcohol constituting the triether of pentaerythritol and aliphatic monohydric alcohol, that is, in the above formula (11),
  • IOB is 0.57. Therefore, the triether of pentaerythritol and aliphatic monohydric alcohol satisfies the requirement that the IOB is about 0.00 to about 0.60 when the total number of carbon atoms of the aliphatic monohydric alcohol is about 9 or more. Fulfill.
  • the total number of carbon atoms of the aliphatic monohydric alcohol constituting the diether of pentaerythritol and aliphatic monohydric alcohol that is, in the formula (12), R 10
  • the IOB is 0.60. Therefore, in the diether of pentaerythritol and aliphatic monohydric alcohol, when the total number of carbon atoms of the aliphatic monohydric alcohol is about 15 or more, the IOB satisfies the requirement of about 0.00 to about 0.60. .
  • the carbon number of the aliphatic monohydric alcohol constituting the monoether of pentaerythritol and aliphatic monohydric alcohol that is, in the above formula (13), R 10
  • the IOB is 0.59. Therefore, in the monoether of pentaerythritol and aliphatic monohydric alcohol, the IOB satisfies the requirement of about 0.00 to about 0.60 when the aliphatic monohydric alcohol has about 22 or more carbon atoms.
  • the total number of carbon atoms of the aliphatic monohydric alcohol constituting the triether of glycerin and aliphatic monohydric alcohol that is, in the formula (14), R
  • the IOB is 0.50. Therefore, in the above triether of glycerin and aliphatic monohydric alcohol, when the total number of carbon atoms of the aliphatic monohydric alcohol is about 3 or more, IOB satisfies the requirement of about 0.00 to about 0.60. .
  • the total number of carbon atoms of the aliphatic monohydric alcohol constituting the diether of glycerin and aliphatic monohydric alcohol that is, in the formula (15), R 14 and R 15
  • the IOB is 0.58. Therefore, in the diether of glycerin and aliphatic monohydric alcohol, the IOB satisfies the requirement of about 0.00 to about 0.60 when the total number of carbon atoms of the aliphatic monohydric alcohol is about 9 or more.
  • the carbon number of the aliphatic monohydric alcohol constituting the monoether of glycerin and aliphatic monohydric alcohol that is, the carbon of R 14 moiety in the formula (16).
  • the IOB is 0.58. Therefore, in the monoether of glycerin and aliphatic monohydric alcohol, the IOB satisfies the requirement of about 0.00 to about 0.60 when the aliphatic monohydric alcohol has about 16 or more carbon atoms.
  • the IOB is about 0. Satisfy requirements of 00 to about 0.60.
  • Compound (B) can be produced by dehydrating condensation of compound (B1) and compound (B2) in the presence of an acid catalyst.
  • C1 Carboxylic acids, hydroxy acids, alkoxy acids or oxo acids (hereinafter referred to as “compounds”) containing a chain hydrocarbon moiety and 2 to 4 carboxyl groups that replace the hydrogen atoms of the chain hydrocarbon moiety.
  • C1) may be referred to as, for example, a chain hydrocarbon carboxylic acid having 2 to 4 carboxyl groups, such as a chain hydrocarbon dicarboxylic acid such as an alkanedicarboxylic acid such as ethanedioic acid.
  • Examples include rubonic acids such as alkanetetracarboxylic acids such as butanetetraacid, pentanetetraacid, hexanetetraacid, heptanetetraacid, octanetetraacid, nonanetetraacid and decanetetra
  • the compound (C1) includes a chain hydrocarbon hydroxy acid having 2 to 4 carboxyl groups, for example, a chain chain having 2 to 4 carboxyl groups such as malic acid, tartaric acid, citric acid, isocitric acid and the like. Hydrocarbon alkoxy acids such as O-acetylcitric acid and chain hydrocarbon oxoacids having 2 to 4 carboxyl groups are included.
  • C2 Examples of the compound having a chain hydrocarbon moiety and one hydroxyl group substituting a hydrogen atom of the chain hydrocarbon moiety include those listed in the section of “Compound (B)”, for example, An aliphatic monohydric alcohol is mentioned.
  • compound (D) a compound having any one bond selected from the group consisting of a carbonate bond (—OCOO—)
  • compound (D) a compound having any one bond selected from the group consisting of a carbonate bond (—OCOO—)
  • compound (D) aliphatic
  • examples include ethers of monohydric alcohols and aliphatic monohydric alcohols, (d 2 ) dialkyl ketones, esters of (d 3 ) fatty acids and aliphatic monohydric alcohols, and (d 4 ) dialkyl carbonates.
  • the ether As the aliphatic monohydric alcohol constituting the ether (corresponding to R 19 OH and R 20 OH in the formula (19)), the ether satisfies the requirements for the IOB, melting point and water solubility.
  • the aliphatic monohydric alcohol listed in the section of “Compound (B)” is not particularly limited.
  • the total number of carbon atoms of the aliphatic monohydric alcohol constituting the ether that is, the number of carbon atoms of R 19 and R 20 in the above formula (19). Since the IOB is 0.50 when the sum of the two is 2, the IOB requirement is satisfied if the total number of carbon atoms is about 2 or more. However, when the total number of carbon atoms is about 6, the water solubility is as high as about 2 g, which is problematic from the viewpoint of vapor pressure. In order to satisfy the requirement of water solubility of about 0.00 to about 0.05 g, the total number of carbon atoms is preferably about 8 or more.
  • dialkylketone As the dialkyl ketone, the following formula (20): R 21 COR 22 (20) (Wherein R 21 and R 22 are each an alkyl group) The compound which has is mentioned.
  • the IOB requirement is satisfied if the total number of carbon atoms is about 5 or more.
  • the water solubility is as high as about 2 g. Therefore, in order to satisfy the requirement of water solubility of about 0.00 to about 0.05 g, the total number of carbon atoms is preferably about 8 or more.
  • the carbon number is preferably about 10 or more, and more preferably about 12 or more.
  • the melting point is about ⁇ 50 ° C.
  • the vapor pressure is about 230 Pa at 20 ° C.
  • the dialkyl ketone can be obtained by a known method, for example, by oxidizing a secondary alcohol with chromic acid or the like.
  • ester of the fatty acid and the aliphatic monohydric alcohol include the following formula (21): R 23 COOR 24 (21) (Wherein R 23 and R 24 are each a chain hydrocarbon) The compound which has is mentioned.
  • Examples of the fatty acid constituting the ester are listed in “(a 1 ) ester of chain hydrocarbon tetraol and at least one fatty acid”.
  • Fatty acids that is, saturated fatty acids or unsaturated fatty acids can be mentioned, and saturated fatty acids are preferable in consideration of the possibility of modification by oxidation or the like.
  • Examples of the aliphatic monohydric alcohol constituting the ester include the aliphatic monohydric alcohols listed in the section “Compound (B)”.
  • the total number of carbon atoms of the fatty acid and the aliphatic monohydric alcohol is 5
  • the above IOB requirement is satisfied when the total number of carbon atoms in the R 23 C and R 24 portions is about 5 or more.
  • the total number of carbon atoms is preferably about 12 or more. If the total number of carbon atoms is about 11 or more, the water solubility can satisfy the requirement of about 0.00 to about 0.05 g.
  • ester of the fatty acid and the aliphatic monohydric alcohol examples include, for example, an ester of dodecanoic acid (C 12 ) and dodecyl alcohol (C 12 ), tetradecanoic acid (C 14 ), and dodecyl alcohol (C 12 ).
  • ester of the above fatty acids and aliphatic monohydric alcohols examples include Electol WE20 and Electol WE40 (manufactured by NOF Corporation).
  • the dialkyl carbonate since the IOB is 0.57 when the total number of carbon atoms of R 25 and R 26 is 6, if the total number of carbon atoms of R 25 and R 26 is about 6 or more, Satisfy requirements. In consideration of water solubility, the total number of carbon atoms of R 25 and R 26 is preferably about 7 or more, and more preferably about 9 or more.
  • the dialkyl carbonate can be synthesized by a reaction between phosgene and an alcohol, a reaction between a chlorinated formate and an alcohol or an alcoholate, and a reaction between silver carbonate and an alkyl iodide.
  • Said oxy C 2 ⁇ 6 alkylene skeleton from the viewpoint of lowering the IOB of polyoxy C 2 ⁇ 6 alkylene glycol, polyoxypropylene skeleton, oxybutylene skeleton, it is oxypentylene skeleton, or an oxy hexylene skeleton
  • oxy A butylene skeleton, an oxypentylene skeleton, or an oxyhexylene skeleton is more preferable.
  • the IOB requirement of 0.000 to about 0.60 the water solubility requirement was not met even when the weight average molecular weight exceeded about 4,000. Therefore, the (e 1) polyoxy C 2 ⁇ 6 alkylene glycols, homopolymers of ethylene glycol is considered to not contain ethylene glycol as block or random copolymers with other glycols, (e 1) polyoxy It should be included in the C 2 ⁇ 6 alkylene glycol.
  • the homopolymer of formula (23) may include a homopolymer of propylene glycol, butylene glycol, pentylene glycol or hexylene glycol. From the above, in formula (23), m is about 3 to about 6, more preferably about 4 to about 6, and n is 2 or more.
  • the weight average molecular weight of the polyoxy C 4-6 alkylene glycol is preferably about 200 to about 10,000, more preferably about 250 to about 8,000, and even more preferably about It is in the range of 250 to about 5,000.
  • the weight average molecular weight of polyoxy C 3 alkylene glycol, ie, polypropylene glycol is preferably about 1,000 to about 10,000, more preferably about 3,000 to about 8 , And more preferably in the range of about 4,000 to about 5,000. This is because, when the weight average molecular weight is less than about 1,000, the water solubility does not satisfy the requirement, and the higher the weight average molecular weight, the more the absorber transfer speed and the whiteness of the top sheet tend to improve.
  • Examples of commercial products of polyoxy C 2 ⁇ 6 alkylene glycols for example, UNIOL (TM) D-1000, D-1200 , D-2000, D-3000, D-4000, PB-500, PB-700, PB- 1000 and PB-2000 (manufactured by NOF Corporation).
  • UNIOL TM
  • D-1000, D-1200 , D-2000, D-3000, D-4000, PB-500, PB-700, PB- 1000 and PB-2000 manufactured by NOF Corporation.
  • esters of at least one fatty acid and the polyoxy C 2 ⁇ 6 alkylene glycol "(e 1) polyoxy C 2 ⁇ 6 alkylene glycol” one of polyoxy C 2 ⁇ 6 OH terminus of alkylene glycol described in the section or Both are esterified with fatty acids, ie monoesters and diesters.
  • esters of polyoxy C 2 ⁇ 6 alkylene glycol and at least one fatty acid are listed in the "(a 1) an ester of a chain hydrocarbon tetraol and at least one fatty acid"
  • Fatty acid that is, saturated fatty acid or unsaturated fatty acid, and saturated fatty acid is preferable considering the possibility of modification by oxidation or the like.
  • Examples of commercial products of esters of polyoxy C 2 ⁇ 6 alkylene glycols with fatty acids for example, Will Bright cp9 (NOF Corporation) and the like.
  • aliphatic monohydric alcohol in ether polyoxy C 2 ⁇ 6 alkylene glycol and at least one aliphatic monohydric alcohol, the aliphatic monohydric alcohol to be etherified, for example, "compound (B)" aliphatic listed in section 1 And monohydric alcohols.
  • Esters of polyoxy C 2 ⁇ 6 alkylene glycol and a chain hydrocarbon tetracarboxylic acid, and chain hydrocarbon tricarboxylic acid or chain hydrocarbon dicarboxylic acids, in addition to commercially available, chain hydrocarbon tetracarboxylic acid , chain hydrocarbon tricarboxylic acid or chain hydrocarbon dicarboxylic acids, oxy C 2 ⁇ 6 alkylene glycol, can be prepared by polycondensation under known conditions.
  • chain hydrocarbon tetraol, chain hydrocarbon triol, and chain hydrocarbon diol to be etherified include those described in the section of “Compound (A)”, such as pentaerythritol, glycerin, and glycol. Is mentioned.
  • the polyoxy C 2 ⁇ 6 alkylene glycol and a chain hydrocarbon tetraol, chain hydrocarbon triol, or as ethers commercial products of the chain hydrocarbon diols for example, UNILUBE (TM) 5TP-300KB, and Uniol (Trademarks) TG-3000 and TG-4000 (manufactured by NOF Corporation) can be mentioned.
  • Unilube (trademark) 5TP-300KB is a compound obtained by polycondensation of 65 mol of propylene glycol and 5 mol of ethylene glycol to 1 mol of pentaerythritol, its IOB is 0.39, and its melting point is less than 45 ° C. Yes, and the water solubility was less than 0.05 g.
  • Uniol TM TG-3000 is a compound obtained by polycondensation of 50 mol of propylene glycol with 1 mol of glycerin, its IOB is 0.42, its melting point is less than 45 ° C., and its water solubility is 0.05 g. And the weight average molecular weight was about 3,000.
  • Uniol TM TG-4000 is a compound obtained by polycondensation of 70 mol of propylene glycol with 1 mol of glycerin, its IOB is 0.40, its melting point is less than 45 ° C., and its water solubility is 0.05 g. And the weight average molecular weight was about 4,000.
  • the polyoxy C 2 ⁇ 6 alkylene glycol, ether chain hydrocarbon tetraol, chain hydrocarbon triol, or a chain hydrocarbon diol also chain hydrocarbon tetraol, chain hydrocarbon triol or chain to Jo hydrocarbon diols, C 2 ⁇ 6 alkylene oxide can be produced by the addition under known conditions.
  • the chain hydrocarbon Since the chain hydrocarbon has an inorganic value of 0, the IOB is 0.00 and the water solubility is approximately 0 g. Therefore, if the melting point is about 45 ° C. or less, the blood It can be included in the modifier.
  • the chain hydrocarbon include (f 1 ) chain alkanes such as straight chain alkanes and branched chain alkanes. For example, in the case of straight chain alkanes, the melting point is about 45 ° C. or less. In general, those having 22 or less carbon atoms are included. Moreover, when the vapor pressure is taken into consideration, those having 13 or more carbon atoms are generally included.
  • the melting point may be lower at the same number of carbons than that of a straight chain alkane. Therefore, those having 22 or more carbon atoms may be included.
  • a commercial item of the above-mentioned hydrocarbon for example, Pearl Ream 6 (NOF Corporation) can be mentioned.
  • the blood modifying agent of the present invention will be discussed in detail together with the examples, but it has been found that it has at least an effect of lowering the viscosity and surface tension of blood.
  • menstrual blood to be absorbed by the absorbent article contains proteins such as the endometrial wall.
  • the blood modifying agent of the present invention to the top sheet, menstrual blood is not easily clogged between the fibers of the top sheet, and menstrual blood is quickly transferred from the top sheet to the absorber. Is possible.
  • the blood modifying agent of the present invention having an IOB of about 0.00 to about 0.60 is highly organic and easily enters between blood cells, so that it is difficult to stabilize blood cells and form a monetary structure in the blood cells. I think it can be done. It is considered that the blood modifying agent of the present invention stabilizes blood cells and makes it difficult to form a monetary structure on the blood cells, so that the absorbent body can easily absorb menstrual blood.
  • the blood modifying agent having a high affinity for red blood cells protects the red blood cell membrane, so that the red blood cells are hardly destroyed.
  • the blood modifying agent of the present invention preferably has a weight average molecular weight of about 2,000 or less, and more preferably has a weight average molecular weight of 1,000 or less. This is because when the weight average molecular weight increases, it becomes difficult to lower the viscosity of the blood modifying agent to a viscosity suitable for coating, and there is a case where the blood modifying agent should be diluted with a solvent. Moreover, when the weight average molecular weight is increased, the blood modifying agent is tacky, which may cause discomfort to the wearer. The following examples confirmed that the blood modifying agent has a mechanism for lowering blood viscosity and surface tension.
  • Example 1 [Blood modifier data] A commercially available sanitary napkin was prepared.
  • the sanitary napkin includes a top sheet formed from an air-through nonwoven fabric (composite fiber made of polyester and polyethylene terephthalate, basis weight: 35 g / m 2 ) treated with a hydrophilic agent, and an air-through nonwoven fabric (composite made of polyester and polyethylene terephthalate).
  • Second sheet formed from fibers, basis weight: 30 g / m 2 ), pulp (basis weight: 150 to 450 g / m 2 , more in the center), acrylic superabsorbent polymer (basis weight: 15 g / m 2 ) And an absorbent body containing a tissue as a core wrap, a side sheet treated with a water repellent, and a back sheet made of a polyethylene film.
  • Tri-C2L oil fatty acid glyceride manufactured by NOF Corporation C 8 fatty acid: C 10 fatty acid: C 12 fatty acid containing approximately 37: 7: 56 weight ratio, glycerol and fatty acid triester, Weight average molecular weight: about 570
  • fatty acids manufactured by NOF Corporation C 8 fatty to C 10 are contained in approximately 85:15 weight ratio of triesters of glycerol with fatty acids, the weight average molecular weight: about 480 ⁇ Panasate 800, manufactured by NOF Corporation All fatty acids are octanoic acid (C 8 ), triester of glycerin and fatty acid, weight average molecular weight: about 470
  • Panaceate 800B manufactured by NOF Corporation All fatty acids are 2-ethylhexanoic acid (C 8 ), triester of glycerin and fatty acid, weight average molecular weight: about 470 ⁇ NA36, manufactured by NOF Corporation C 16 fatty acid: fatty acid C 18: (including both saturated and unsaturated fatty acids) fatty acids to C 20 is approximately 5: contained in a weight ratio of 3: 92 Triester of glycerin and fatty acid, weight average molecular weight: about 880
  • C 8 fatty C 10: fatty acid
  • C 12 fatty acid
  • C 14 (including both saturated and unsaturated fatty acids)
  • C 16 is approximately 4 : Triester of glycerin and fatty acid, contained in a weight ratio of 8: 60: 25: 3, weight average molecular weight: 670 -Caprylic acid diglyceride, manufactured by NOF Corporation
  • Fatty acid is octanoic acid, diester of glycerin and fatty acid, weight average molecular weight: 340
  • Uniol PB1000R polybutylene glycol manufactured by NOF Corporation, weight average molecular weight: about 1000 [(E 2) an ester of polyoxy C 2 ⁇ 6 alkylene glycol and at least one fatty acid] -Wilbright cp9, manufactured by NOF Co., Ltd.
  • Uniol TG-3000 manufactured by NOF Corporation Polyglycol glycol glyceryl ether, about 16 repeating units, weight average molecular weight: about 3,000 ⁇ Uniol TG-4000, glyceryl ether of polypropylene glycol manufactured by NOF Corporation, about 16 repeating units, weight average molecular weight: about 4,000
  • [Other materials] -NA50 manufactured by NOF Corporation Hydrogen added to NA36 to reduce the ratio of double bonds derived from the unsaturated fatty acid as a raw material Triester of glycerin and fatty acid, weight average molecular weight: about 880
  • PEG 1500 manufactured by NOF Corporation, polyethylene glycol, weight average molecular weight: about 1,500 to about 1,600 Nonionic S-6, polyoxyethylene monostearate manufactured by NOF Corporation, about 7 repeating units, weight average molecular weight: about 880 -Wilbright s753, NOF Corporation polyoxyethylene polyoxypropylene polyoxybutylene glycerin, weight average molecular weight: about 960
  • the IOB, melting point and water solubility of the sample are shown in Table 2 below.
  • the water solubility was measured according to the method described above, but 20.0 g was added to 100 g of demineralized water, and the sample dissolved after 24 hours was evaluated as “20 g ⁇ ”. Samples that dissolved 0.05 g but did not dissolve 1.00 g were evaluated as 0.05 to 1.00 g.
  • “ ⁇ 45” means that the melting point is less than 45 ° C.
  • the skin contact surface of the top sheet of the sanitary napkin was coated with the blood modifying agent described above.
  • Each blood modifying agent is heated as it is if the blood modifying agent is liquid at room temperature, and if the blood modifying agent is solid at room temperature, it is heated to melting point + 20 ° C., and then control seam HMA gun
  • Each blood modifying agent was atomized and applied to the entire skin contact surface of the top sheet so that the basis weight was approximately 5 g / m 2 .
  • FIG. 12 is an electron micrograph of the skin contact surface of the top sheet in a sanitary napkin (No. 2-5) in which the top sheet contains tri-C2L oil fatty acid glycerides. As is apparent from FIG. 12, the tri-C2L oil fatty acid glyceride is in the form of fine particles and adheres to the fiber surface. According to the above-mentioned procedure, the rewetting rate and the absorber transfer speed were measured. The results are shown in Table 2 below.
  • Rewetting rate (%) 100 ⁇ (filter paper mass after test ⁇ initial filter paper mass) / 6
  • absorption body transfer rate which is the time for blood to transfer from the top sheet to the absorber, was measured after the second drop of blood.
  • absorption body transfer speed means the time from when blood is introduced into the top sheet until the redness of blood is not seen on the surface and inside of the top sheet.
  • the rewetting rate was 22.7% and the absorber transfer rate was more than 60 seconds, but all triesters of glycerin and fatty acids had a rewetting rate. Since it is 7.0% or less and the absorber transfer speed is 8 seconds or less, it can be seen that the absorption performance is greatly improved. However, among the triesters of glycerin and fatty acid, NA50 having a melting point exceeding 45 ° C. did not significantly improve the absorption performance.
  • a blood modifying agent having an IOB of about 0.00 to about 0.60, a melting point of about 45 ° C. or less, and a water solubility of about 0.00 to about 0.05 g for 100 g of water at 25 ° C. It was found that the absorption performance was greatly improved.
  • Example 2 The rewetting rate was evaluated according to the procedure described above for various animal blood.
  • the blood used in the experiment is as follows. [Animal species] (1) Human (2) Horse (3) Sheep
  • Defibrinated blood After collecting blood, stirred for about 5 minutes in an Erlenmeyer flask with glass beads
  • ⁇ EDTA blood 65 mL of venous blood plus 0.5 mL of 12% EDTA / 2K physiological saline
  • Serum or plasma supernatant after centrifuging defibrinated blood or EDTA blood, respectively, at room temperature at about 1900 G for 10 minutes.
  • Blood cell serum is removed from the blood, and the residue is phosphate buffered saline (PBS ) Washed twice and then added with phosphate buffered saline for the removed serum
  • An absorbent article was produced in the same manner as in Example 2 except that the tri-C2L oil fatty acid glyceride was applied so that the basis weight was approximately 5 g / m 2, and the rewetting rate was evaluated for the various blood types described above. . The measurement was performed 3 times for each blood, and the average value was adopted. The results are shown in Table 3 below.
  • Example 2 The same tendency as the horse EDTA blood obtained in Example 2 was also obtained in human and sheep blood. Similar trends were also observed in defibrinated blood and EDTA blood.
  • Tri C2L oil fatty acid glyceride is applied to the skin contact surface of the top sheet formed from an air-through nonwoven fabric (a composite fiber composed of polyester and polyethylene terephthalate, basis weight: 35 g / m 2 ) using a control seam HMA gun. It is atomized and applied so that the basis weight is approximately 5 g / m 2 . Moreover, the thing which has not apply
  • the top sheet containing a blood modifying agent has low blood retention and can be quickly transferred to an absorber after absorbing blood.
  • Example 4 [Viscosity of blood containing blood modifying agents] The viscosity of blood containing a blood modifying agent was measured using a Rheometric Expansion System ARES (Rheometric Scientific, Inc). 2% by mass of panacet 810s was added to equine defibrinated blood, lightly stirred to form a sample, the sample was placed on a parallel plate with a diameter of 50 mm, the gap was 100 ⁇ m, and the viscosity was measured at 37 ⁇ 0.5 ° C. . Because of the parallel plate, the sample did not have a uniform shear rate, but the average shear rate displayed on the instrument was 10 s ⁇ 1 .
  • the viscosity of equine defibrinated blood containing 2% by mass of panacet 810s was 5.9 mPa ⁇ s, while the viscosity of equine defibrinated blood containing no blood modifying agent was 50.4 mPa ⁇ s. Therefore, it can be seen that equine defibrinated blood containing 2% by mass of panacet 810s decreases the viscosity by about 90% compared to the case where no blood modifying agent is contained.
  • blood is known to contain components such as blood cells and have thixotropic properties
  • the blood modifying agent of the present disclosure is considered to be able to lower the viscosity of blood in a low viscosity range. It is considered that the absorbed menstrual blood can be quickly transferred from the top sheet to the absorber by lowering the viscosity of the blood.
  • Example 5 [Micrograph of blood containing blood modifying agent]
  • the menstrual blood of healthy volunteers is collected on Saran Wrap (trademark), and a portion of panacet 810s dispersed in 10 times the mass of phosphate buffered saline is used, so that the concentration of panacet 810s is 1% by mass.
  • Menstrual blood was appropriately applied to a slide glass, covered with a cover glass, and the state of red blood cells was observed with an optical microscope.
  • a photomicrograph of menstrual blood containing no blood modifying agent is shown in FIG. 13 (a)
  • a photomicrograph of menstrual blood containing panacet 810s is shown in FIG. 13 (b).
  • red blood cells form aggregates such as remuneration, but in menstrual blood that includes panacet 810s, red blood cells are each stably dispersed. I understand. Therefore, it is suggested that the blood modifying agent functions to stabilize red blood cells in the blood.
  • Example 6 [Surface tension of blood containing blood modifying agents] The surface tension of blood containing a blood modifying agent was measured by a pendant drop method using a contact angle meter Drop Master 500 manufactured by Kyowa Interface Science Co., Ltd. The surface tension was measured after adding a predetermined amount of blood modifying agent to sheep defibrinated blood and shaking sufficiently. The measurement is automatically performed by the instrument, and the density ⁇ is obtained by the following equation (see FIG. 14).
  • the density ⁇ is defined in 5. of “Density Test Method and Density / Mass / Capacity Conversion Table” of JIS K 2249-1995. Based on the vibration density test method, the temperature was measured as shown in Table 5 below. For measurement, DA-505 of Kyoto Electronics Industry Co., Ltd. was used. The results are shown in Table 5.
  • the blood modifying agent has a water solubility of about 0.00 to about 0.05 g in 100 g of water at 25 ° C., but the solubility in water is very low. It can be seen that the surface tension of blood can be lowered. By reducing the surface tension of the blood, it is considered that the absorbed blood can be quickly transferred to the absorbent body without being held between the fibers of the top sheet.

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  • Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Absorbent Articles And Supports Therefor (AREA)

Abstract

L'invention a pour objectif de fournir un nouvel article absorbant permettant une torsion régulière. Afin d'atteindre cet objectif, une serviette hygiénique (1) est équipée : d'une feuille supérieure (2) perméable au liquide ; d'une feuille inférieure (3) non perméable au liquide ; et d'un corps absorbant (4) agencé entre la feuille supérieure (2) et la feuille inférieure (3). Au niveau de la feuille supérieure (2), une région hautement rigide (22) et une région faiblement rigide (21) sont formées en une région pour apport en liquide corporel (20) recevant un apport en liquide corporel ; des premières régions sensiblement en forme de droite se prolongeant dans une direction croisant la direction longitudinale de la serviette hygiénique (1), et rangées de manière sensiblement parallèle sont formées dans la région hautement rigide (22) ; et des orifice perméables au liquide corporel (26) sont formés dans la région faiblement rigide (21) de sorte que la rigidité de cette dernière est plus faible que celle de la région hautement rigide (22).
PCT/JP2013/054794 2012-02-29 2013-02-25 Article absorbant WO2013129325A1 (fr)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04152945A (ja) * 1990-10-16 1992-05-26 Uni Charm Corp 吸収性物品の表面シート
JP2009061026A (ja) * 2007-09-05 2009-03-26 Kao Corp 吸収性物品
JP2011104059A (ja) * 2009-11-16 2011-06-02 Kao Corp 吸収性物品

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Publication number Priority date Publication date Assignee Title
US5650214A (en) * 1996-05-31 1997-07-22 The Procter & Gamble Company Web materials exhibiting elastic-like behavior and soft, cloth-like texture
JP4095425B2 (ja) * 2002-12-09 2008-06-04 ユニ・チャーム株式会社 体液吸収性物品の透液性表面シート
US8030535B2 (en) * 2002-12-18 2011-10-04 The Procter & Gamble Company Sanitary napkin for clean body benefit
US7650848B2 (en) * 2004-02-17 2010-01-26 University Of Florida Research Foundation, Inc. Surface topographies for non-toxic bioadhesion control
JP2005296480A (ja) * 2004-04-15 2005-10-27 Uni Charm Corp 生理用ナプキン

Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
JPH04152945A (ja) * 1990-10-16 1992-05-26 Uni Charm Corp 吸収性物品の表面シート
JP2009061026A (ja) * 2007-09-05 2009-03-26 Kao Corp 吸収性物品
JP2011104059A (ja) * 2009-11-16 2011-06-02 Kao Corp 吸収性物品

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