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WO2001007234A1 - Etiquette de decoration dans le moule et article moule dote de ladite etiquette thermofusionnee - Google Patents

Etiquette de decoration dans le moule et article moule dote de ladite etiquette thermofusionnee Download PDF

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Publication number
WO2001007234A1
WO2001007234A1 PCT/JP2000/004874 JP0004874W WO0107234A1 WO 2001007234 A1 WO2001007234 A1 WO 2001007234A1 JP 0004874 W JP0004874 W JP 0004874W WO 0107234 A1 WO0107234 A1 WO 0107234A1
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WO
WIPO (PCT)
Prior art keywords
label
weight
resin
layer
mold
Prior art date
Application number
PCT/JP2000/004874
Other languages
English (en)
Japanese (ja)
Inventor
Kimio Kurumi
Shigeto Kimura
Takatoshi Nishizawa
Masaki Shiina
Original Assignee
Yupo Corporation
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
Application filed by Yupo Corporation filed Critical Yupo Corporation
Priority to AU60220/00A priority Critical patent/AU6022000A/en
Publication of WO2001007234A1 publication Critical patent/WO2001007234A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/24—Lining or labelling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B32B27/327—Layered products comprising a layer of synthetic resin comprising polyolefins comprising polyolefins obtained by a metallocene or single-site catalyst
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
    • G09F3/04—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps to be fastened or secured by the material of the label itself, e.g. by thermo-adhesion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/744—Labels, badges, e.g. marker sleeves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2323/00—Polyalkenes
    • B32B2323/04—Polyethylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2519/00—Labels, badges

Definitions

  • the present invention relates to a label for thin-mold molding and a molded product obtained by heat-sealing the label.
  • the present invention relates to a label for in-mold molding that can be suitably used for a stretch blow molding method, and a molded article obtained by heat-sealing the label for in-mold molding.
  • Polyolefin resins for blow molding such as polyethylene and polypropylene, are low-cost materials with excellent moldability and drop strength, and have been widely used as bottle containers and the like as an alternative to glass bottles.
  • the epoch-making solution to this problem is the use of a resin label containing polyolefin as a main component, and a method in which the resin is sandwiched on the mold surface during blow molding and fused with the resin (hereinafter referred to as in-mold molding). ). Since this method has many advantages, it has been widely adopted as a method of displaying a molded article such as a polyolefin bottle instead of a paper label attaching method.
  • the molding temperature of the polyolefin resin at the time of stretching pro-forming should be increased. It is necessary to give a heat amount that allows the resin label to melt and fuse, or to lower the melting point of the label.
  • One way to raise the molding temperature during stretch blow molding is to increase the melting point of the preform resin.
  • polyolefin resin for example, use a homopolypropylene with a relatively high melting point of 160 ° C. Is also conceivable.
  • polypropylene random copolymers which have excellent transparency and gloss, are generally used as polyolefin resins for stretch molding, and when such high melting point materials are used, the transparency is poor. There is a problem that it will be connected.
  • the present invention provides a method for blocking labels.
  • An object of the present invention is to provide a label for in-mold molding which has good adhesiveness when formed by a stretch blow molding method and suppresses the occurrence of prestar.
  • Another object of the present invention is to provide a high-quality molded product obtained by heat-sealing such a label for in-mold molding. Disclosure of the invention
  • the present inventors have conducted various studies to achieve the above object, and as a result, surprisingly, as a heat sealable resin constituting a label for in-mold molding, ethylene copolymerized in the presence of a meta-open catalyst ⁇
  • the inventor has found that a label for in-mold molding having excellent fusion strength and suppressed blocking can be obtained by using a hypoolefin copolymer resin, thereby providing the present invention.
  • the present invention relates to a method for producing an ethylene monoolefin having a density of 0.870 to 0.920 g / cm 3 polymerized by a metallocene catalyst on one surface of a thermoplastic resin film substrate layer (I).
  • a label for in-mold molding provided with a heat-sealable resin layer (II) containing a copolymer as a main component, and a stretch blow-molded article in which the label is heat-sealed by in-mold molding.
  • FIG. 1 is a cross-sectional view showing a layer structure of an in-mold molding label of the present invention.
  • I is a thermoplastic resin film base layer
  • II is a heat sealing resin layer
  • A is a core layer
  • B is a front layer
  • C is a back layer
  • D is an intermediate layer.
  • FIG. 2 is an overall front external view showing a state in which four labels are integrally attached to a circular bottle.
  • 1 is the plastic bottle
  • 2 is the label
  • a is the center point of the bottle body height (vertical) direction
  • a is the opposite side of a
  • hi is the mouth's shoulder
  • 5 is the body
  • a is the bottom
  • P.L is the professional mold matching surface (parting line).
  • FIG. 3 is an aa ′ sectional view of the body of the bottle in FIG. 2. Detailed description of the invention
  • the label for in-mold molding of the present invention has a structure in which a heat-sealable resin layer ( ⁇ ) is provided on one surface of a thermoplastic resin film base layer (I). have. Therefore, each of these layers will be described in order.
  • thermoplastic resin film layer is a film-like layer made of a thermoplastic resin, and functions as a base material of the label for in-mold molding of the present invention.
  • a material for the thermoplastic resin film layer a conventionally used material for a label substrate can be used.
  • polyolefin resins such as polypropylene, propylene-ethylene copolymer, high-density polyethylene, medium-density polyethylene, polymethyl-1-pentene, ethylene-monocyclic olefin copolymer, polyethylene terephthalate resin, polyvinyl chloride resin, nylon-6 And polyamide-based resins such as Nylon-6,6, Nylon-16,10, Nylon-6,12, etc., and films such as ABS resin, ionomer resin and the like.
  • a thermoplastic resin having a melting point in the range of 130 to 280 ° C. such as polypropylene, high-density polyethylene, or polyethylene terephthalate resin, is preferable.
  • These resins may be used alone or as a mixture of two or more.
  • the thermoplastic resin as the main component preferably has a melting point higher than the melting point of the polyolefin resin constituting the heat-sealing resin layer by 15 ° C. or more.
  • a polypropylene-based resin from the viewpoint of chemical resistance and cost.
  • examples of such a polypropylene resin include a propylene homopolymer exhibiting isotactic or syndiotactic stereoregularity, propylene as a main component, ethylene, 1-butene, 1-hexene, 1-heptene, 4 —Methyl-1-pentene and other copolymers Can be mentioned. These copolymers may be binary, ternary or quaternary, and may be random copolymers or block copolymers.
  • thermoplastic resin film base layer (I) contains, in addition to the thermoplastic resin described above, an inorganic fine powder, an organic fine powder, a dispersant, an antioxidant, a compatibilizer, an ultraviolet stabilizer, an anti-packing agent, and the like. Can be added.
  • the type of these additives is not particularly limited.
  • Examples of the inorganic fine powder include heavy calcium carbonate, light calcium carbonate, calcined clay, talc, barium sulfate, diatomaceous earth, magnesium oxide, zinc oxide, titanium oxide, and silicon oxide.
  • heavy calcium carbonate, calcined clay, and silver are preferred because they are inexpensive and have good moldability. Particularly preferred is heavy calcium carbonate.
  • Organic fine powders include polyethylene terephthalate, polybutylene terephthalate, polyamide, polycarbonate, polyethylene naphthalate, polystyrene, melamine resin, polyethylene sulphite, polyimide, polyamide terketone, polyphenylene sulphate, etc. Can be exemplified. Above all, it is preferable to use incompatible fine powder having a higher melting point than the thermoplastic resin used.
  • thermoplastic resin film base layer (I) For the thermoplastic resin film base layer (I), one of the above fine powders may be selected and used alone, or two or more may be selected and used in combination. Good. When two or more kinds are used in combination, an inorganic fine powder and an organic fine powder may be mixed and used. In the in-mold molding label of the present invention, a stretched microporous resin film stretched using inorganic fine powder is preferably used as the thermoplastic resin film base layer (I). When using an inorganic fine powder, it is preferable to use one having an average particle size of 0.1 to 30 ⁇ m, more preferably 0.2 to 20 // m. .
  • thermoplastic resin film base layer (I) for example, as disclosed in Japanese Patent Publication No. 46-19794, an inorganic fine powder is added to a thermoplastic resin in an amount of 8 to 65% by weight.
  • Stretched microporous resin film obtained by stretching the blended polypropylene resin composition; Synthetic paper comprising the stretched resin film; Stretched resin film ⁇ Latex containing inorganic filler on the surface of the synthetic paper (a pigment coating agent) ); A film obtained by depositing aluminum on the above-described resin stretched film; or a film obtained by sticking an aluminum foil to the resin stretched film.
  • the thermoplastic resin film base layer (I) may be composed of a single layer or may be composed of a plurality of layers.
  • a surface layer (B) is formed on one surface of a core layer (A) [(B) / (A)];
  • a surface layer (B) is formed on one surface of (A) and a back surface layer (C) is formed on the opposite surface [(B) / (A) / (C)];
  • An embodiment in which an intermediate layer (D) and a surface layer (B) are sequentially formed on one surface, and a back surface layer (C) is formed on the opposite surface [(B) / (D) / (A) / (C)
  • An embodiment in which an intermediate layer (D) and a surface layer (B) are sequentially formed on one surface of a core layer (A), and a back layer (C) and an intermediate layer (D,) are formed on the
  • the core layer (A) is preferably made of a biaxially stretched film. Above all, it is preferable to be formed of a biaxially stretched film containing an inorganic fine powder, a high-density polyethylene, and a polypropylene resin. In particular, it is preferably formed of a biaxially stretched film containing 5 to 30% by weight of an inorganic fine powder, 3 to 20% by weight of a high-density polyethylene, and 92 to 50% by weight of a polypropylene resin.
  • the thickness of the core layer (A) is preferably from 12 to 80 m, more preferably from 20 to 70 m.
  • the surface layer (B) and the back layer (C) are preferably made of a uniaxially stretched film.
  • the film is made of a uniaxially stretched film containing inorganic fine powder, high-density polyethylene and polypropylene resin.
  • inorganic fine powder 35-65% by weight of inorganic fine powder, 0-10% by weight of high-density polyethylene, and 5% by weight of polypropylene resin.
  • the film is made of a uniaxially stretched film containing 5 to 35% by weight.
  • the thickness of the surface layer (B) and the thickness of the back layer (C) are each independently preferably 2 to 40 ⁇ m, more preferably 3 to 35 zm.
  • the intermediate layers (D) and (D,) are preferably made of a uniaxially stretched film.
  • the thicknesses of the intermediate layers (D) and (D ') are each independently preferably from 0 to 40 m, more preferably from 0 to 35 m.
  • inorganic fine powder is 5 to 30% by weight
  • high density polyethylene is 3 to 20% by weight
  • polypropylene is high in terms of printability on the label surface, supply of the label into the mold, and prevention of heat shrinkage of the label.
  • core layer (A) of a biaxially stretched film containing 92 to 50% by weight of inorganic resin, 35 to 65% by weight of inorganic fine powder, 0 to 10% by weight of high density polyethylene and polypropylene resin A surface layer (B) of a uniaxially stretched film containing 55 to 35% by weight, and 35 to 65% by weight of an inorganic fine powder on a surface of the core layer (A) opposite to the surface layer (B); It is preferable to use a thermoplastic resin film base layer (I) having a backside layer (C) of a uniaxially stretched film containing 0 to 10% by weight of high-density polyethylene and 55 to 35% by weight of a polypropylene resin.
  • thermoplastic resin film base layer (I) 35-65% by weight of inorganic fine powder and high-density polyethylene of 0-10 are provided between the core layer (A) and the surface layer (B). It is also preferable to use a thermoplastic resin film base layer (I) having an intermediate layer (D) of a uniaxially stretched film containing 50% by weight and 55 to 35% by weight of a propylene-based resin.
  • the film constituting the thermoplastic resin film substrate layer is stretched in at least one direction.
  • Thermoplastic resin film base layer from multiple layers When configured, each layer may be stretched before lamination, or may be stretched after lamination. Further, the stretched layer may be stretched again after lamination. Furthermore, after forming the heat-sealing resin layer on the thermoplastic resin film base layer, the whole may be stretched as a whole.
  • the stretching temperature can be set to be equal to or higher than the glass transition point of the thermoplastic resin to be used in the case of the non-crystalline resin, and in the case of the crystalline resin, to be equal to or higher than the glass transition point of the non-crystalline portion and lower than the melting point of the crystalline portion.
  • a specific method of stretching is not particularly limited, it is preferable to perform stretching by using a difference in peripheral speed between roll groups. According to this method, the stretching ratio can be arbitrarily adjusted.
  • the resin is oriented in the flow direction of the film, a label having a high tensile strength and a small dimensional change due to the tension during printing can be obtained as compared with an unstretched film.
  • the total thickness of the thermoplastic resin film base layer (I) is preferably from 20 to 200 m, more preferably from 40 to 150 m. If the total thickness is less than 20 / m, the strength of the label will be insufficient, and a problem may occur when the label is inserted into the mold. If it exceeds 200 m, the strength of the boundary between the container and the label tends to decrease.
  • Printing can be performed on the thermoplastic resin film base layer (I).
  • it is preferable to print on the surface layer (B).
  • the type of printing is not particularly limited, and printing can be performed by, for example, offset printing, gravure printing, flexographic printing, screen printing, continuous printing, inkjet printing, electrophotographic printing, and the like.
  • the barcode, manufacturer, distributor, character, product name, usage, precautionary statements, date of manufacture, etc. can be printed on the front side.
  • the printability of the surface can be improved by corona discharge treatment or the like as necessary.
  • the heat-sealable resin layer (II) constituting the label for in-mold molding of the present invention is a layer having a function of sticking to the resin material by heat applied during in-mold molding.
  • the heat-sealable resin layer (II) that constitutes the label for the in-mold molding of the present invention is mainly composed of an ethylene-hydroolefin copolymer having a density of 0.870 to 0.920 g / cm 3 , which is polymerized by a meta-aqueous catalyst. Ingredients.
  • the one-year-old fin used for the copolymerization is not particularly limited as long as it is a monomer other than ethylene, but preferably has 3 to 30 carbon atoms. Specific examples include 1-butene, 1-hexene, 1-heptene, 4-methyl-1-pentene, and the like.
  • the ratio of the monomer components at the time of the copolymerization is not particularly limited, but it is preferable to copolymerize 40 to 98% by weight of ethylene and 60 to 2% by weight of a single olefin having 3 to 30 carbon atoms.
  • meta-acene catalyst used in the copolymerization examples include a meta-acene alumoxane catalyst, for example, a reaction between a meta-acene compound and a methylacene compound as disclosed in International Patent Publication WO 92/01723. And a compound that forms a stable anion.
  • a linear copolymer (linear polyethylene resin) is most suitable.
  • the linear linear copolymer has a density of 0.870 to 0.920 g / cm 3 , and preferably 0.880 to 0.910 g / cm 3 . If the density is less than 0.870 g / cm 3, blocking is likely to occur in the production of the label or in the printing process, which is not preferable. Also the density is more than 0. 920 gZcm 3, during stretch blow molding weak thermal fusion between the port re olefin resin, Rishite the label Bliss evening one or peeling occurs, only with no commercial value moldings obtained I will not be able to.
  • the melting point of the linear linear copolymer is preferably 50 to 110 ° C, more preferably 55 to 105 ° C. If the melting point is lower than 50 ° C, blocking tends to occur easily during label production, during the printing process, and in the packaging state after cutting the label. On the other hand, if the melting point exceeds 110 ° C, hot melt with polyolefin resin during stretch blow molding. The clothes are weak, and the labels tend to peel off and bliss is likely to occur.
  • ethylene / polyolefin copolymer obtained by copolymerization in the presence of a meta-open catalyst may be used alone, or two or more types may be used in combination.
  • heat-sealable resin layer (II) can be arbitrarily added to the heat-sealable resin layer (II) as long as the performance required for the heat-sealable resin layer (II) is not hindered.
  • additives include dyes, nucleating agents, plasticizers, release agents, antioxidants, antiblocking agents, flame retardants, ultraviolet absorbers, and the like.
  • the thickness of the heat-sealable resin layer (II) is usually 1 to 10 ⁇ m, preferably 2 to 8 / m.
  • the heat-sealable resin of the label is melted and fused by the heat of the parison during stretch blow molding, and the thickness of the heat-sealable resin layer (II) must be 1 mm for the bottle and the label to be firmly fused. It is preferably at least m. On the other hand, if the thickness exceeds 10 m, the label is likely to be curled, making it difficult to print or fixing the label to a mold.
  • the heat-sealable resin layer (II) may be subjected to embossing if necessary, as disclosed in JP-A-2-84319 or JP-A-3-260689, to more reliably prevent the occurrence of bliss. Can be prevented.
  • the tensile modulus (Young's modulus) of the label for in-mold molding of the present invention is preferably from 5,000 to 30,000 kgf / cm 2 , and preferably from 10,000 to 25,000 Okgf Zcm 2. More preferred. If the tensile modulus of the label is less than 5,000 kgf / cm 2 , the buckling strength due to label sticking tends to decrease. Conversely, if the tensile modulus of the label exceeds 30,00 OkgfZcm 2 , If the ability of the molded article to follow the primary curved surface of the torso is deteriorated, wrinkles are likely to occur on the label, and the bottle is likely to be greatly deformed.
  • the label of the present invention can be used for in-mold molding and attached to a resin molded product.
  • the label of the present invention is particularly suitable for stretch blow molding among in-mold molding. The feature is that it can be used appropriately.
  • the stretch blow molding method a method generally used for molding a container of polyethylene terephthalate can be used.
  • the hot parison method is a one-stage molding method
  • the cold parison method is a two-stage molding method in which the injection molding process and the stretch blow molding process are independent.
  • blow molding machine used for molding in the case of the hot Norrison method, an apparatus commercially available from Nissei ASB Kikai Co., Ltd., Aoki Kenkyusho Co., Ltd., etc. can be used.
  • Rison method a device commercially available from Frontier Co., Ltd., Yuhara, etc. can be used.
  • injection molding for example, a test tube-shaped bottomed preform is molded, and then adjusted to a temperature slightly lower than the melting point of the resin constituting the bottomed preform. Injection molding is performed using a general-purpose molding machine equipped with one or more preform molds. Specifically, it is preferable that the injection temperature is 150 to 250 ° C., the injection pressure is 100 kg / cm 2 or more, and the mold clamping pressure is 50 tons or more.
  • the stretch blow molding machine consists of a preform heating section and a blow mold section provided with a stretching rod.
  • the heating section of the hot parison method generally has a mechanism for controlling the temperature of a preform made of a polyolefin resin using a heating mold or the like.
  • the heating section of the Cordon-Lysson method generally has a mechanism for heating the preform with an infrared lamp heater.
  • a typical preform shape is a test tube shape with a mouth.
  • the form of the mouth is not particularly limited.
  • a screw portion, a handle, and a concave / convex rib structure that can be fitted to the cap may be formed in the mouth.
  • the mouth is not usually stretch blown.
  • the thickness of the stretch blown portion of the preform is preferably 0.5 to 6 mm.
  • the preform is transported if the thickness is thin, it deformed And the shape retention during heating tends to be poor.
  • the wall thickness is large, the heat is difficult to be transmitted when made of a crystalline resin such as polyolefin, and the temperature difference in the wall thickness direction tends to increase. For this reason, the temperature range in which stretch blow molding can be performed becomes narrow, and problems such as uneven wall thickness may occur.
  • the stretch ratio of the preform by stretch blow is generally about 1.5 to 5 times in both the longitudinal (axial) direction and the lateral (circumferential) direction of the preform.
  • the stretching may be performed vertically and horizontally separately, but it is preferable to perform the stretching simultaneously.
  • the temperature at the time of stretching blow differs depending on the material of the preform.
  • the temperature is preferably lower than the melting point and higher than the crystallization temperature, usually 80 to 150 ° C.
  • the type of the resin used for the stretch molding is not particularly limited.
  • a polyolefin resin, a polyethylene terephthalate resin, a polyethylene naphthalate resin, a polyamide resin, a polyvinyl chloride resin, a polystyrene resin, a polycarbonate resin, or the like can be used.
  • a polyolefin resin examples include a polypropylene resin and a polyethylene resin.
  • the polypropylene-based resin includes a polypropylene-based resin having a propylene homopolymer, a random copolymer, or a block copolymer as a main component.
  • Polyethylene resins include high-density polyethylene (HDPE), high-pressure polyethylene (HP-LDPE), linear low-density polyethylene (L-LDPE), ultra-low-density linear polyethylene (VL-LPE), and polyethylene.
  • HDPE high-density polyethylene
  • HP-LDPE high-pressure polyethylene
  • L-LDPE linear low-density polyethylene
  • VL-LPE ultra-low-density linear polyethylene
  • polyethylene polyethylene resin mainly composed of vinyl acetate copolymer (EVA). These resins may be used alone or may be used in a mixture at an arbitrary ratio.
  • These resins also contain crystallization nucleating agents, antioxidants, neutralizing agents, antistatic agents, A fixing agent, an ultraviolet absorber, a lubricant, an anti-blocking agent, and a colorant can be added directly or as a batch as needed.
  • melt-kneading using a roll, a Banbury, a single-screw kneading extruder, a twin-screw kneading extruder or the like improves dispersion and is preferable in terms of transparency and gloss.
  • a batch-and-mass batch method in which a high-concentration additive previously mixed and mixed by melt-kneading is diluted and blended can also be used.
  • the in-mold molding label of the present invention is attached to the inner surface of the mold in advance, and the preform is sandwiched between the molds to form a molded article such as a cylinder with a biaxial stretch blow molding machine. It is easily melt-bonded to the reform. This makes it possible to obtain a molded article with a label having excellent adhesive strength and suppressed blisters.
  • the label sticking position in the molded article is not particularly limited, in a preferred embodiment, the label of the present invention is formed as three or more labels discontinuous in the circumferential direction of the cross section of the trunk in the longitudinal direction of the trunk.
  • the molded article include an in-mold molded article. This molded article has excellent vertical compressive strength and crushability when the molded article is discarded.It can reduce the thickness of resin bottles and reduce the amount of raw material resin used. The required reduction in buckling strength of the bottle is improved.
  • the cross section of the body of the molded body is preferably circular in order to make air easily escape during the in-mold molding of the label, but may be polygonal such as triangular or more.
  • the ratio of the length of the body in the vertical direction, that is, the length in the container height direction, to the total length of the container is higher because the effect of improving the buckling strength is higher. Specifically, it is preferable that the length ratio is 0.5 (50%) or more.
  • the mouth, the shoulder, and the bottom of the molded body are preferably thicker than the wall thickness of the body because the in-mold label is difficult to adhere to and may buckle at these parts.
  • the number of ink mold labels stuck is 3 or more, preferably 3 to 6. If the number is less than three, the effect of improving the buckling strength is reduced, and if the number is too large, the label insert process tends to be complicated.
  • the in-mold label is attached to the body, it is preferable to attach the in-mold label also to the shoulder and the bottom because the effect of improving the buckling strength increases.
  • the width of the label is preferably 10 mm or more because the label may bend when the label is inserted. It is preferable that the number of lapels to be attached to the in-mold label in the circumferential direction is equal to the number of lapels in the circumferential direction.
  • Concentrating in one direction increases the buckling strength on one side only and may deform when compressed from one side. Further, in the case where an in-mold label is affixed to a corner in a polygonal shape of a square or more, it is preferable to provide a chamfering R at each corner, and it is preferable that the radius has a radius of 5 mm or more.
  • the MFR is a value measured according to JIS-K-6760, and the density is a value measured according to JIS-K-712.
  • Propylene homopolymer (Nippon Polychem Corp., Novatec PP, MA_8, melting point 164 ° C) 67 parts by weight, high density polyethylene (Nippon Polychem Corp., Novatec HD, HJ580, melting point 134 ° C, density 0.960 gZcm 3 ) 10 parts by weight and a resin composition (A) consisting of 23 parts by weight of calcium carbonate powder having a particle size of 1.5 m are melt-kneaded using an extruder, and then heated at a temperature of 250 ° C from a die. The sheet was extruded and cooled to a temperature of about 50 ° C. After the sheet was heated again to about 150 ° C, it was stretched four times in the machine direction using the peripheral speed of the roll group to obtain a uniaxially stretched film.
  • A resin composition consisting of 23 parts by weight of calcium carbonate powder having a particle size of 1.5 m
  • propylene homopolymer (Nippon Polychem Co., Ltd., Novatec P P, MA-3, melting point 165 ° C) 51.5 parts by weight, high density polyethylene (Nippon Polychem Co., Ltd., HJ580, density 960 g / cm 3 ) 3.5 parts by weight, particle size 1.
  • a composition (B) consisting of 42 parts by weight of 5 m calcium carbonate powder and 3 parts by weight of titanium oxide powder having a particle size of 0.8 ⁇ m was melt-kneaded at 240 ° C. by using another extruder, and this was kneaded.
  • a film was extruded from a die onto the surface of the uniaxially stretched film and laminated (B / A) to obtain a surface layer / core layer laminate.
  • a hexene copolymer (1-hexene content 22% by weight, crystallinity 30, number average molecular weight 23,000, melting point 90 ° C) was obtained and pelletized. This was used as a pellet for the heat-sensitive resin layer ( ⁇ ) of Example 1.
  • pellets having the resin composition shown in Table 1 were used as pellets for the heat-sealing resin layer (II).
  • a composition (C) comprising 42 parts by weight of calcium carbonate powder and 3 parts by weight of a titanium oxide powder having a particle size of 0.8 ⁇ m, and a pellet for the heat-sealable resin layer (II) were separately prepared.
  • the mixture was melt-kneaded at 230 ° C., supplied to one co-extrusion die, and laminated in the die.Then, the laminate was extruded from the die into a film at 230 ° C.
  • the four-layer film (B / A / CZII) was extruded on the core layer side of the laminate for surface layer / core layer (BZA) so that the heat-sealable resin layer (II) was on the outside.
  • BZA surface layer / core layer
  • a pellet-shaped resin composition was obtained by melt-kneading with an extruder having a single-shaft, full-flight screw with a diameter of 40 mm heated to an injection molding machine (Toshiba Machine Co., Ltd.) using the obtained pellet-shaped resin composition.
  • a preform was molded by IS-150E manufactured by Co., Ltd.
  • a test tube with an outer diameter of 24 mm, a height of 85 mm, a maximum thickness of 3.5 mm, and a weight of 14 g under the conditions of an injection resin temperature of 210 ° C, an injection pressure of 10 kg / cm 2 , and a metal cooling temperature of 25 ° C Shaped bottomed parisons were injection molded.
  • the preform was molded by a cold parison method biaxial stretch blow molding machine (EFB 1000ET manufactured by Frontier). Specifically, the preform is heated by rotating the preform with an infrared lamp, and when the surface temperature of the preform reaches 118 ° C with a non-contact surface thermometer, the label created in advance above is molded. Attaching to the inner surface, sandwiching the preform in the mold, the longitudinal stretching ratio becomes 2.7 times, the horizontal stretching ratio becomes 2.4 times.
  • the cylindrical container (molded product) is blow-molded biaxially with a primary pressure of 4 kg / cm 2 and a secondary pressure of 25 kg / cm 2 with the rise of the longitudinal stretching rod, and is molded with a label.
  • the body (vessel) was obtained.
  • Table 1 shows the results of visually evaluating the occurrence of blisters in the obtained molded article with a label according to the following criteria.
  • the label fused to the molded product was cut to a width of 15 mm, and the adhesive strength between the label and the molded product was measured at 300 mm / min using a tensile tester (Shimadzu Corporation, Autograph AGS-D type). It was determined by T-peeling at the tensile speed. Table 1 shows the results. The criteria for judging the practicality of the label by the adhesive strength are as follows (unit: g / 1
  • the unit of adhesive strength is g / 15 mm
  • the label for in-mold molding of the present invention is characterized in that the blocking between the labels is suppressed, the adhesiveness in the in-mold molding is good, and the generation of prestar is suppressed.
  • a molded article made of polyolefin obtained by heat-sealing the label of the present invention by the stretch blow molding method has excellent heat-sealing properties, and the occurrence of blisters is sufficiently suppressed.
  • the label for in-mold molding of the present invention can be used for stretch blow molding, it has very excellent design properties and water resistance. It has become possible to produce blow-molded products with good workability and low total cost. Since these molded articles can be widely used for containers for toilet articles and toilets such as shampoos and rinses, containers for chemical bottles, etc., the present invention has a very high utility value industrially.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Laminated Bodies (AREA)

Abstract

L'invention concerne une étiquette de décoration dans le moule comprenant une couche (I) de substrat à film en résine thermoplastique et, placée sur une surface de celle-ci, une couche (II) de résine thermoscellable contenant, comme constituant principal, un copolymère d'éthylène α-oléfine ayant été polymérisé à l'aide d'un catalyseur à métallocène et ayant une densité de 0,870 à 0,920 g/cm3. Les étiquettes précitées de décoration dans le moule sont caractérisées en ce qu'elles présentent peu de blocage entre elles, elles présentent une bonne adhésion lorsqu'elles sont utilisées en moulage par soufflage avec étirage et sont exemptes de cloques.
PCT/JP2000/004874 1999-07-23 2000-07-21 Etiquette de decoration dans le moule et article moule dote de ladite etiquette thermofusionnee WO2001007234A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU60220/00A AU6022000A (en) 1999-07-23 2000-07-21 Label for in-mold decorating and molded article having said label fused thermally thereto

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP11208920A JP2001030342A (ja) 1999-07-23 1999-07-23 ポリオレフィン製延伸ブロー成形用インモールドラベル及びそのラベルを熱融着させた成形体
JP11/208920 1999-07-23

Publications (1)

Publication Number Publication Date
WO2001007234A1 true WO2001007234A1 (fr) 2001-02-01

Family

ID=16564324

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2000/004874 WO2001007234A1 (fr) 1999-07-23 2000-07-21 Etiquette de decoration dans le moule et article moule dote de ladite etiquette thermofusionnee

Country Status (3)

Country Link
JP (1) JP2001030342A (fr)
AU (1) AU6022000A (fr)
WO (1) WO2001007234A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004009344A1 (fr) 2002-07-18 2004-01-29 Avery Dennison Corporation Film multicouche dans le moule
WO2006053267A1 (fr) * 2004-11-10 2006-05-18 Avery Dennison Corporation Etiquettes surmoulees et leurs utilisations
US7858776B2 (en) 2002-10-03 2010-12-28 Astrazeneca Ab Lactams and uses thereof
EP2490203A4 (fr) * 2009-10-14 2014-04-02 Yupo Corp Étiquette pour un moulage dans le moule, article moulé dans le moule et son procédé de moulage
US8795579B2 (en) 2012-01-27 2014-08-05 Altira, Inc. Localized shaping for container decoration

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004136486A (ja) * 2002-10-16 2004-05-13 Dainippon Printing Co Ltd インモールドラベル成形用ラベル並びにインモールドラベル二軸延伸ブロー成形品及びその製造方法。
US8021727B2 (en) 2005-03-30 2011-09-20 Yupo Corporation In-mold molding label and molded product using the same
JP5201353B2 (ja) * 2009-01-08 2013-06-05 ラクトテック株式会社 食品容器用の遮光性印刷ラベル
JP5579394B2 (ja) * 2009-01-30 2014-08-27 株式会社ユポ・コーポレーション インモールド成形用ラベル

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09207166A (ja) * 1996-02-02 1997-08-12 Oji Yuka Synthetic Paper Co Ltd インモールド成形用ラベル
JPH09230791A (ja) * 1996-02-22 1997-09-05 Kao Corp 熱活性型ラベル及びラベル付き成形体の製造方法
JPH10315410A (ja) * 1997-05-16 1998-12-02 Toppan Printing Co Ltd ラベル、ラベルの製造方法およびラベル付きプラスチック容器

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09207166A (ja) * 1996-02-02 1997-08-12 Oji Yuka Synthetic Paper Co Ltd インモールド成形用ラベル
JPH09230791A (ja) * 1996-02-22 1997-09-05 Kao Corp 熱活性型ラベル及びラベル付き成形体の製造方法
JPH10315410A (ja) * 1997-05-16 1998-12-02 Toppan Printing Co Ltd ラベル、ラベルの製造方法およびラベル付きプラスチック容器

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004009344A1 (fr) 2002-07-18 2004-01-29 Avery Dennison Corporation Film multicouche dans le moule
EP1551626A4 (fr) * 2002-07-18 2007-04-04 Avery Dennison Corp Film multicouche dans le moule
AU2003281630B2 (en) * 2002-07-18 2009-05-07 Avery Dennison Corporation Multilayer in-mold film
US7858776B2 (en) 2002-10-03 2010-12-28 Astrazeneca Ab Lactams and uses thereof
WO2006053267A1 (fr) * 2004-11-10 2006-05-18 Avery Dennison Corporation Etiquettes surmoulees et leurs utilisations
AU2005304335B2 (en) * 2004-11-10 2009-09-17 Avery Dennison Corporation In-mold labels and uses thereof
EP2490203A4 (fr) * 2009-10-14 2014-04-02 Yupo Corp Étiquette pour un moulage dans le moule, article moulé dans le moule et son procédé de moulage
US9633580B2 (en) 2009-10-14 2017-04-25 Yupo Corporation Label for in-mold molding, in-mold molded article and method for molding same
US8795579B2 (en) 2012-01-27 2014-08-05 Altira, Inc. Localized shaping for container decoration

Also Published As

Publication number Publication date
AU6022000A (en) 2001-02-13
JP2001030342A (ja) 2001-02-06

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