WO2018174254A1 - 熱収縮性ラベル、包装体、および熱収縮性ラベルの製造方法 - Google Patents
熱収縮性ラベル、包装体、および熱収縮性ラベルの製造方法 Download PDFInfo
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- WO2018174254A1 WO2018174254A1 PCT/JP2018/011748 JP2018011748W WO2018174254A1 WO 2018174254 A1 WO2018174254 A1 WO 2018174254A1 JP 2018011748 W JP2018011748 W JP 2018011748W WO 2018174254 A1 WO2018174254 A1 WO 2018174254A1
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- Prior art keywords
- heat
- solvent
- shrinkable
- film
- label
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L25/00—Compositions of, homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Compositions of derivatives of such polymers
- C08L25/02—Homopolymers or copolymers of hydrocarbons
- C08L25/04—Homopolymers or copolymers of styrene
- C08L25/06—Polystyrene
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- 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
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
- B29C65/4895—Solvent bonding, i.e. the surfaces of the parts to be joined being treated with solvents, swelling or softening agents, without adhesives
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- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
- B29C66/112—Single lapped joints
- B29C66/1122—Single lap to lap joints, i.e. overlap joints
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- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
- B29C66/43—Joining a relatively small portion of the surface of said articles
- B29C66/432—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms
- B29C66/4322—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms by joining a single sheet to itself
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- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
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- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
- B29C66/737—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined
- B29C66/7371—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined oriented or heat-shrinkable
- B29C66/73715—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the state of the material of the parts to be joined oriented or heat-shrinkable heat-shrinkable
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D23/00—Details of bottles or jars not otherwise provided for
- B65D23/08—Coverings or external coatings
- B65D23/0842—Sheets or tubes applied around the bottle with or without subsequent folding operations
- B65D23/0878—Shrunk on the bottle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D25/00—Details of other kinds or types of rigid or semi-rigid containers
- B65D25/34—Coverings or external coatings
- B65D25/36—Coverings or external coatings formed by applying sheet material
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/02—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques
- C08J3/09—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques in organic liquids
- C08J3/091—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques in organic liquids characterised by the chemical constitution of the organic liquid
- C08J3/095—Oxygen containing compounds
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/12—Bonding of a preformed macromolecular material to the same or other solid material such as metal, glass, leather, e.g. using adhesives
- C08J5/122—Bonding of a preformed macromolecular material to the same or other solid material such as metal, glass, leather, e.g. using adhesives using low molecular chemically inert solvents, swelling or softening agents
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
- C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L27/04—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C08L27/06—Homopolymers or copolymers of vinyl chloride
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L53/00—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
- C08L53/02—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers of vinyl-aromatic monomers and conjugated dienes
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- 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
- G09F3/02—Forms or constructions
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2023/00—Tubular articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B29L2031/744—Labels, badges, e.g. marker sleeves
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- C—CHEMISTRY; METALLURGY
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2325/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Derivatives of such polymers
- C08J2325/02—Homopolymers or copolymers of hydrocarbons
- C08J2325/04—Homopolymers or copolymers of styrene
- C08J2325/06—Polystyrene
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2327/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
- C08J2327/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
- C08J2327/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C08J2327/06—Homopolymers or copolymers of vinyl chloride
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2423/10—Homopolymers or copolymers of propene
- C08J2423/12—Polypropene
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- C—CHEMISTRY; METALLURGY
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2467/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2467/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
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- C—CHEMISTRY; METALLURGY
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/16—Applications used for films
- C08L2203/162—Applications used for films sealable films
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
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- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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- G—PHYSICS
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- G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
- G09F3/02—Forms or constructions
- G09F2003/0251—Sleeve shaped label, i.e. wrapped around a device
Definitions
- the present invention relates to a heat-shrinkable label formed by rolling a heat-shrinkable polyvinyl chloride film or a heat-shrinkable polystyrene film into a tube shape and bonding both ends of the film with a solvent.
- the present invention relates to a heat-shrinkable label in which excessive penetration of a solvent in a solvent adhesion portion hardly occurs even if a film forming the label is thin.
- the heat-shrinkable film Since the heat-shrinkable film has a function of shrinkability, it can be laminated and integrated with an object by the shrinkage force and shapeability of the film itself without using fixing means such as an adhesive or a fastener. Therefore, it has not only mechanical protection of the object by lamination or coating, but also functions such as binding and sealing. Furthermore, when the heat-shrinkable film itself has a special function, the special function can be added to the object later by lamination. This property is effectively used in the packaging field in which the main purpose is to protect the object during storage and distribution, and to provide display and design.
- bottles including glass and plastic bottles various containers such as cans, long objects such as pipes, bars, wood, various rod-like bodies, or sheet-like bodies, for covering, binding, exterior Used for use or sealing.
- it is used for applications that cover a part or the whole of the cap part, shoulder part, and trunk part of the bottle for the purpose of improving the commercial value by displaying, protecting, binding, and functionalizing.
- it is also used for applications such as packing, packaging a plurality of packages, such as boxes, bottles, plates, sticks, notebooks, etc., and packaging with a film in close contact with the package (skin package). Used.
- the display is preliminarily provided with a modeling for the purpose of design, the product is a label.
- the material of the heat-shrinkable film polyvinyl chloride, polystyrene, polyester, polyamide, aliphatic polyolefin, derivatives thereof, hydrochloric acid rubber and the like are used.
- a film made of these materials is formed into a tube shape and, for example, covered with a bottle or pipes are collected, and then heat shrinkage is performed for packaging and binding.
- all of the conventional heat-shrinkable films have poor heat resistance and cannot withstand high temperature boiling and retort processing, and therefore cannot be sterilized at high temperatures when applied to food, sanitary goods, and pharmaceutical applications.
- drawbacks For example, when a retort process is performed, the conventional film has a problem that it is easily damaged during the process.
- a film made of polyester resin is excellent in heat resistance, dimensional stability, solvent resistance, etc., but it is precisely manufactured to achieve desired heat-shrink characteristics, adhesiveness, etc. Condition control technology was necessary, and there were problems such as cost.
- heat-shrinkable films are also used in fields where films and labels that have not been heat-shrinkable are conventionally used.
- many beverage container labels have been replaced with heat-shrinkable labels from affixed labels made of films that are not paper or heat-shrinkable films.
- heat shrink labels are actively applied in relation to recycling problems, and various forms and systems of packaging designs are being implemented.
- a polyvinyl chloride shrink film having a very excellent heat shrink property and a small natural shrinkage ratio and a polystyrene shrink film having a low shrinkage stress and a high shrinkage ratio are often used.
- An object of the present invention is to provide a heat-shrinkable label and a package having a solvent-bonded portion that can provide peel strength.
- a heat-shrinkable polyvinyl chloride film or a heat-shrinkable polystyrene film is a tube-shaped heat-shrinkable label bonded to each other with a solvent composition, and the solvent composition is tetrahydrofuran (THF), methyl ethyl ketone ( MEK), and a solvent composition comprising at least one organic solvent selected from the group consisting of ethyl acetate and at least one resin selected from the group consisting of polyester, polypropylene, and hydrogenated petroleum resin.
- THF tetrahydrofuran
- MEK methyl ethyl ketone
- a heat-shrinkable label, wherein the adhesive portion has a peel strength of 2 N / 15 mm or more.
- a package comprising the heat-shrinkable label according to any one of the above items 1 to 4 on at least a part of the outer periphery of an object to be packaged. 6). At least one organic solvent selected from the group consisting of tetrahydrofuran (THF), methyl ethyl ketone (MEK), and ethyl acetate; and at least one type selected from the group consisting of polyester, polypropylene, and hydrogenated petroleum resin.
- THF tetrahydrofuran
- MEK methyl ethyl ketone
- ethyl acetate at least one type selected from the group consisting of polyester, polypropylene, and hydrogenated petroleum resin.
- At least one organic solvent selected from the group consisting of tetrahydrofuran (THF), methyl ethyl ketone (MEK), and ethyl acetate; and at least one type selected from the group consisting of polyester, polypropylene, and hydrogenated petroleum resin.
- a heat-shrinkable label having a part and a package can be provided.
- the heat-shrinkable label of the present invention is a tube-shaped heat-shrinkable label formed by overlapping both ends of a heat-shrinkable polyvinyl chloride film or heat-shrinkable polystyrene film and bonding them with a solvent composition. is there.
- the end means an end in the width direction (direction along the longitudinal direction), and is a position including a portion within 20 mm from the end.
- the heat-shrinkable polyvinyl chloride film of the present invention includes not only a film composed of only one polyvinyl chloride layer but also a laminated film such as polyvinyl chloride / resin other than polyvinyl chloride / polyvinyl chloride.
- a laminated film in which both layers are polyvinyl chloride films is also included.
- the heat-shrinkable polystyrene film of the present invention is not only a film consisting of only one polystyrene layer, but also a laminated film such as a resin / polystyrene other than polystyrene / polystyrene, and both outer layers are polystyrene films.
- a laminated film is also included.
- the adhesive solvent composition has at least one organic solvent selected from the group consisting of THF, MEK, and ethyl acetate, and at least one selected from the group consisting of polyester, polypropylene, and hydrogenated petroleum resin.
- THF, MEK, and ethyl acetate are all good solvents for polyvinyl chloride and polystyrene. Since the polyvinyl chloride film and the polystyrene film are rapidly dissolved, the obtained solvent-bonded portion has high peel strength. However, since solvent penetration tends to occur, it is unsuitable for thin films. Further, when the coating amount is reduced, the peeling strength is insufficient due to the variation in the coating amount in solvent bonding at high speed.
- polyester can be suitably used as an adhesive because it contains one or more monomer components that can be amorphous components, and can be easily dissolved by an organic solvent or heat.
- Polypropylene has low stereoregularity.
- a hydrogenated petroleum resin of dicyclopentadiene / aromatic copolymer system can be suitably used as an adhesive, and as described above, high peel strength can be obtained even with a small amount of solvent.
- At least one organic solvent selected from the group consisting of good solvents such as THF, MEK, and ethyl acetate, and at least one selected from the group consisting of polyester, polypropylene, and hydrogenated petroleum resin that function as an adhesive By including both kinds of resins in the solvent composition in the solvent composition, it is possible to stably exhibit high peel strength even in the tubing process that covers the above-described drawbacks and has been accelerated. Further, even if the heat-shrinkable polyvinyl chloride film or the heat-shrinkable polystyrene film is thinned, it is difficult for solvent penetration to occur.
- dicarboxylic acid components other than terephthalic acid constituting the polyester used in the solvent composition of the present invention include aromatic dicarboxylic acids such as isophthalic acid, naphthalenedicarboxylic acid, orthophthalic acid, adipic acid, azelaic acid, sebacic acid, decane. Examples thereof include aliphatic dicarboxylic acids such as dicarboxylic acids, and alicyclic dicarboxylic acids.
- diol components other than ethylene glycol constituting the polyester used in the solvent composition include aliphatic diols such as 1,3-propanediol, 1,4-butanediol, neopentyl glycol, and hexanediol, and 1,4- Examples thereof include alicyclic diols such as cyclohexanedimethanol and aromatic diols such as bisphenol A.
- Polyesters used in the solvent composition of the present invention include aromatic dicarboxylic acids such as isophthalic acid, aliphatic dicarboxylic acids such as adipic acid, cyclic diols such as 1,4-cyclohexanedimethanol, and diols having 3 or more carbon atoms (
- aromatic dicarboxylic acids such as isophthalic acid
- aliphatic dicarboxylic acids such as adipic acid
- cyclic diols such as 1,4-cyclohexanedimethanol
- diols having 3 or more carbon atoms
- polyesters containing at least one of 1,3-propanediol, 1,4-butanediol, neopentyl glycol, hexanediol and the like and having a glass transition point (Tg) of 70 ° C. or less are preferable. .
- the polyester used in the solvent composition has a total of 30 monomer components that can be amorphous components in 100 mol% of the polyvalent carboxylic acid component or 100 mol% of the polyhydric alcohol component in all polyester resins. It is at least mol%, preferably at least 40 mol%, more preferably at least 50 mol%. This is because if the total amount of monomer components that can be amorphous components is less than 30 mol%, the solubility in the organic solvent is low, and it cannot be used as an adhesive solvent.
- Examples of the monomer that can be an amorphous component include isophthalic acid, orthophthalic acid, adipic acid, sebacic acid, 1,4-cyclohexanedimethanol, neopentyl glycol, 1,3-propanediol, 1,4-butanediol, Mention may be made of hexanediol.
- the upper limit of the content of at least one resin selected from the group consisting of polyester, polypropylene, and hydrogenated petroleum resin contained in the solvent composition of the present invention is 40% by weight or less, preferably 37% by weight or less, more Preferably it is 34 weight% or less.
- the higher the content of the resin contained in the solvent composition the higher the viscosity of the solvent composition. In a high-speed tubing process, the solvent composition should be stably applied to the polyvinyl chloride film in a constant amount. This is because it becomes difficult.
- the lower limit of the content of the resin contained in the solvent composition is 5% by weight or more, preferably 8% by weight or more. If the content of the resin contained in the solvent composition is less than 5% by weight, the peel strength is insufficient when the coating amount of THF or the like is reduced.
- the lower limit of the viscosity of the solvent composition is not particularly limited. However, if the viscosity is too high, it is difficult to stably apply a certain amount in a high-speed tubing process, and therefore, the lower limit is preferably less than 100 mPa ⁇ s. .
- the viscosity of the solvent composition is more preferably 80 mPa ⁇ s or less, further preferably 60 mPa ⁇ s or less, and particularly preferably 50 mPa ⁇ s or less.
- the solvent composition is preferably applied to a heat-shrinkable polyvinyl chloride film or heat-shrinkable polystyrene film at a rate of about 50 to 550 mg / m 2 using a known center seal machine or the like.
- the application width of the adhesive solvent composition in the tubing step is preferably 1 mm or more in order to suppress peeling of the adhesive portion, and the upper limit is not particularly limited. However, the smaller the label area used, the smaller the cost, 10 mm or less is preferable.
- the speed of the tubing step is not particularly limited, but is preferably 300 to 500 m / min in terms of speeding up.
- the tubular label after the tubing step is usually folded flat and wound into a roll, and then the label is unwound and cut into a predetermined length to become a final product. You may perform a cutting process, without.
- the peel strength of the solvent adhesion portion is 2 N / 15 mm or more, preferably 3 N / 15 mm or more, more preferably 4 N / 15 mm or more. If the peel strength is 2 N / 15 mm or more, troubles such as peeling during use can be prevented.
- the upper limit of the peeling strength of a solvent adhesion part is less than 10 N / 15mm.
- a peel strength of 10 N / 15 mm or more could not be realized.
- the measuring method of peeling strength follows the method as described in an Example.
- the thickness of the heat-shrinkable polyvinyl chloride film or the heat-shrinkable polystyrene film constituting the heat-shrinkable label of the present invention is preferably 5 ⁇ m or more and 50 ⁇ m or less. In order to meet the demand for thinning, the thickness is more preferably 30 ⁇ m or less.
- the label may be provided with a printing layer in a portion other than the adhesive portion.
- the heat-shrinkable label of the present invention preferably has a heat shrinkage rate of 40% or more in the main shrinkage direction at 90 ° C. in warm water for 10 seconds. If the heat shrinkage is 40% or more, a beautiful shrink finish can be obtained.
- the thermal shrinkage rate in 90 ° C. warm water is preferably 15% or less. If it exceeds 15%, a phenomenon called “vertical shrinkage” in which the vertical direction of the label shrinks tends to occur, which is not preferable.
- the heat shrinkage rate in the main shrinkage direction means the heat shrinkage rate in the direction in which the sample contracts most, and the main shrinkage direction is determined by the length of the square sample in the vertical or horizontal direction. The method for measuring the thermal shrinkage (%) follows the method described in the examples.
- the structure of the polyvinyl chloride resin constituting the heat-shrinkable label of the present invention is not particularly limited as long as the heat-shrinkable characteristics described later can be exhibited, but the number average degree of polymerization is about 800 to 2500, preferably about 1000.
- polyvinyl chloride copolymers mainly composed of vinyl chloride (for example, ethylene-vinyl chloride copolymer, vinyl acetate-vinyl chloride copolymer, vinyl chloride-halogenated olefin copolymer), or the like
- vinyl chloride for example, polyester resin, epoxy resin, acrylic resin, vinyl acetate resin, urethane resin, acrylonitrile-styrene-butadiene copolymer, partially saponified polyvinyl alcohol
- These vinyl chloride resins may be obtained by any conventional production method such as bulk polymerization, emulsion polymerization, suspension polymerization, and solution polymerization. These vinyl chloride resins may be used alone or in combination of two or more.
- plasticizer used in heat-shrinkable vinyl chloride resin films, a small amount of plasticizer is usually used to improve the flexibility of the film, the low-temperature shrinkability of the stretched film, the fluidity during extrusion of the resin, and the stretch processability. It is blended.
- plasticizer used in the present invention include phthalic acid derivatives such as di-n-octyl phthalate, di-2-ethylhexyl phthalate, diisononyl phthalate, diisodecyl phthalate, and dicyclohexyl phthalate, and isophthalic acid derivatives such as diisooctyl isophthalate.
- adipic acid derivatives such as dioctyl adipate, tricresyl phosphate, trixylenyl phosphate, and epoxidized soybean oil.
- the above plasticizers may be used alone or in combination of two or more, and are preferably contained in the heat-shrinkable vinyl chloride film in an amount of 20% by weight to 40% by weight, more preferably It is 25 weight% or more and 35 weight% or less.
- various additive components such as a modifier, a heat stabilizer, a filler, an ultraviolet absorber, an antioxidant, an anti-tacking agent, and an antistatic agent are added as desired within the range not detracting from the object of the present invention.
- a coloring agent, a coloring agent, etc. can be mix
- modifying agent examples include methyl methacrylate-butadiene-styrene terpolymer (MBS resin), acrylonitrile-butadiene-styrene terpolymer (ABS resin), ethylene-vinyl acetate copolymer, chlorine, and the like.
- heat stabilizers include organotin mercaptide, organotin maleate, organotin carboxylate, metal soap, lead, Ba-Zn, Ca-Zn, and Ca-Zn. -Ba type, Ba-Mg-Al type, epoxy compound type, and chelators such as organic phosphites.
- Examples of the filler include silica, talc, aluminum hydroxide, hydrotalcite, calcium sulfate, calcium silicate, calcium hydroxide, magnesium hydroxide, kaolin clay, mica, alumina, magnesium carbonate, sodium aluminate, phosphorus
- Examples of the ultraviolet absorber include benzotriazole, benzophenone, and salicylic acid.
- the heat-shrinkable polyvinyl chloride film molding resin composition of the present invention uses the above-mentioned vinyl chloride resin, plasticizer, and various additive components used as required in a predetermined ratio, for example, a ribbon blender. , A Banbury mixer, a Henschel mixer, a super mixer, a single or twin screw extruder, and a kneading machine such as a roll.
- the configuration of the polystyrene-based resin constituting the heat-shrinkable label of the present invention is not particularly limited as long as the heat-shrinkable properties described below can be exhibited, but preferably a polystyrene containing a polystyrene-based resin having a syndiotactic structure It is good that it is a resin. More preferably, a polystyrene resin having a syndiotactic structure is used as the polystyrene resin. By using a polystyrene resin having a syndiotactic structure, mechanical strength and heat resistance are improved.
- polystyrene-based resin in addition to the low density of polystyrene, which is advantageous for separation in the recycling process, it is excellent in heat resistance, particularly heat storage during heat storage, etc.
- the change in printing pitch due to shrinkage is reduced, and high-precision printing can be performed as a label.
- the durability against the solvent contained in the printing ink is improved, and the printability is excellent.
- the polystyrene resin having the syndiotactic structure is preferably 75% or more by dyad (two constituent units) in the tacticity for quantifying the phenyl group and / or substituted phenyl group as a side chain by a nuclear magnetic resonance method.
- dyad two constituent units
- it is 85% or more, and it is preferably 30% or more, more preferably 50% or more in pentad (5 structural units).
- polystyrene component constituting the polystyrene resin used in the present invention examples include polystyrene, poly (p-, m-, or o-methylstyrene), poly (2,4-, 2,5-, 3,4-, Or 3,5-dimethylstyrene), poly (alkylstyrene) such as poly (p-tertiarybutylstyrene), poly (p-, m-, or o-chlorostyrene), poly (p-, m-, or o-bromostyrene), poly (p-, m-, or o-fluorostyrene), poly (halogenated styrene) such as poly (o-methyl-p-fluorostyrene), poly (p-, m-, or poly (halogenated substituted alkylstyrene) such as o-chloromethylstyrene), poly (p-, m-, or o-methoxys
- poly (alkylsilylstyrene) such as poly (p-trimethylsilylstyrene), and poly (vinylbenzyldimethoxyphosphide).
- thermoplastic resins include polystyrene having an atactic structure, styrene resins such as AS resin and ABS resin, polyester resins such as polyethylene terephthalate, polyethylene naphthalate and polybutylene terephthalate, nylon 6, nylon 66, nylon 12, nylon 4 And polyamide resins such as polyhexamethylene adipamide, and polyolefin resins such as polyethylene, polypropylene, and polybutene.
- a rubbery copolymer containing a styrene compound as a constituent component is preferable, and examples thereof include a random, block or graft copolymer obtained by copolymerizing one or more of styrene and a rubber component.
- examples of such rubbery copolymer include styrene-butadiene copolymer rubber, styrene-isoprene block copolymer, rubber obtained by hydrogenating a part or all of the butadiene portion, and methyl acrylate-butadiene-styrene.
- Examples include copolymer rubber, acrylonitrile-butadiene-styrene copolymer rubber, acrylonitrile-alkyl acrylate-butadiene-styrene copolymer rubber, and methyl methacrylate-alkyl acrylate-butadiene-styrene copolymer rubber.
- the rubbery copolymer containing the above-mentioned styrene compound as a constituent component has a styrene unit, and therefore has good dispersibility with respect to a polystyrene resin having a syndiotactic structure, and has an effect of improving plasticity with respect to the polystyrene resin. large.
- the rubber-like copolymer which contains the above-mentioned styrene-type compound as the structural component can be used conveniently.
- the rubber component includes natural rubber, polybutadiene, polyisoprene, polyisobutylene, neoprene, ethylene-propylene copolymer rubber, urethane rubber, silicone rubber, acrylic rubber, polyether-ester rubber, polyester-ester. Rubber or the like can be used.
- the weight average molecular weight of the polystyrene resin is preferably 10,000 or more, and more preferably 50,000 or more.
- a film having a weight average molecular weight of less than 10,000 is not preferred because the strength and heat resistance of the film and the heat resistance are likely to be lowered.
- the upper limit of the weight average molecular weight is not particularly limited, but if the weight average molecular weight exceeds 1,500,000, it may not be preferable because breakage may occur due to an increase in stretching tension.
- Various types of polystyrene resins are commercially available from various manufacturers, and commercially available resins may be used.
- the other layers may be one layer or two or more layers.
- the heat-shrinkable polyvinyl chloride film constituting the heat-shrinkable label of the present invention is obtained by melt-extruding the above polyvinyl chloride raw material with an extruder to form an unstretched film.
- This method can be obtained by transverse stretching and heat treatment.
- a plurality of extruders, feed blocks and multi-manifolds may be used.
- the raw material resin is melt-extruded, the polyvinyl chloride raw material is melted at a temperature of 150 to 200 ° C. using an extruder. Extrude into a film.
- any existing method such as a T-die method or a tubular method can be employed.
- an unstretched film can be obtained by rapidly cooling the sheet-like molten resin after extrusion.
- a method of rapidly cooling the molten resin a method of obtaining a substantially unoriented resin sheet by casting the molten resin from a die onto a rotating drum and rapidly solidifying it can be suitably employed.
- the obtained unstretched film is preheated at 80 to 120 ° C., preferably 90 to 110 ° C., if necessary, and then 3.0 times or more with a tenter or the like in the transverse direction (direction perpendicular to the extrusion direction), preferably Stretch from 3.5 times to 7 times.
- the stretching temperature is 70 ° C. or higher and 110 ° C. or lower, preferably 80 ° C.
- the heat-shrinkable polyvinyl chloride film constituting the heat-shrinkable label of the present invention is obtained.
- the heat-shrinkable polystyrene-based film constituting the heat-shrinkable label of the present invention is a melt-extruded polyester raw material as described above to form an unstretched film, and the unstretched film is formed by a predetermined method shown below. It can be obtained by longitudinally and transversely stretching and heat-treating.
- laminating a plurality of extruders, feed blocks, and multi-manifolds may be used. Normally, two or more kinds of chip-like polystyrene are mixed and used as a film raw material. In the case of stacking, a plurality of extruders may be used.
- the polystyrene raw material is melted at a temperature of 200 to 250 ° C. and extruded into a film using an extruder.
- any existing method such as a T-die method or a tubular method can be employed.
- an unstretched film can be obtained by rapidly cooling the sheet-like molten resin after extrusion.
- a method of rapidly cooling the molten resin a method of obtaining a substantially unoriented resin sheet by casting the molten resin from a die onto a rotating drum and rapidly solidifying it can be suitably employed.
- the obtained unstretched film is heated by a roll at 70 to 100 ° C., preferably at 80 to 90 ° C., if necessary, and then longitudinally stretched by 1.1 to 1.8 times using a roll speed difference.
- the obtained film after longitudinal stretching is preheated at 80 to 120 ° C., preferably 90 to 110 ° C. if necessary, and then 3.0 times or more by a tenter or the like in the transverse direction (direction perpendicular to the extrusion direction) Preferably, it is stretched 3.5 times or more and 7 times or less.
- the stretching temperature is 70 ° C. or higher and 100 ° C. or lower, preferably 70 ° C. or higher and 95 ° C. or lower.
- the heat treatment is performed to relieve the tension state of the stretched film, and is effective in adjusting the heat shrinkage rate at the temperature during the heat treatment and reducing the natural shrinkage rate.
- the heat-shrinkable polyvinyl chloride film or heat-shrinkable polystyrene film of the present invention can be labeled by a conventionally known method.
- appropriate printing is applied to a heat-shrinkable polyvinyl chloride film or heat-shrinkable polystyrene film cut to a desired width, and the left and right ends (both ends) of the film are overlapped with the above solvent composition.
- To produce a tube film This tube film is cut into an appropriate length to obtain a tube-shaped label.
- At least one organic solvent selected from the group consisting of tetrahydrofuran (THF), methyl ethyl ketone (MEK), and ethyl acetate is an essential component, and in addition, benzene, toluene, xylene, trimethyl.
- Aromatic hydrocarbons such as benzene, halogenated hydrocarbons such as methylene chloride and chloroform, phenols such as phenol, or mixtures thereof can be used.
- the label is attached to a bottle container such as a plastic bottle by the thermal contraction of the label when passing through these tunnels.
- the package of the present invention preferably has a perforation or notch label obtained from the heat-shrinkable polyvinyl chloride film or heat-shrinkable polystyrene film of the present invention on at least a part of the outer periphery of the packaging object. It is formed by coating and heat shrinking.
- Examples of the packaging object include PET bottles for beverages, various bottles, cans, plastic containers such as confectionery and lunch boxes, paper boxes, and the like.
- a label obtained from a heat-shrinkable polyvinyl chloride film is heat-shrinkable and coated on these packaging objects, the label is heat-shrinked by about 5 to 70% to form a package. Adhere closely.
- printing may be given to the label coat
- the measuring method of the physical property of the film obtained by the Example and the comparative example is as follows. [Hot water heat shrinkage] The film was cut into a 10 cm ⁇ 10 cm square along the longitudinal direction and its orthogonal direction (width direction), and immersed in warm water of 90 ° C. ⁇ 0.5 ° C. for 10 seconds in a no-load state and thermally contracted. Thereafter, the sample was immediately immersed in water at 25 ° C. ⁇ 0.5 ° C.
- Shrinkage rate ⁇ (length before shrinkage ⁇ length after shrinkage) / length before shrinkage ⁇ ⁇ 100 (%)
- the direction with the largest shrinkage rate (main shrinkage direction) of the film is the width direction.
- Glass transition point (Tg) It calculated
- An unstretched film (10 mg) was heated from 25 ° C. to 120 ° C. at a temperature rising rate of 10 ° C./min to obtain a temperature rising profile. The temperature at the intersection of the base line extension below the glass transition temperature and the tangent indicating the maximum slope at the transition was taken as the glass transition temperature.
- the amount of solvent applied is adjusted as desired.
- Viscosity of adhesive solvent composition Using a B-type viscometer manufactured by Atago Co., Ltd. (model: BASE L), measurement was performed under the conditions of an adhesive solvent composition temperature of 23 ° C. and a rotation speed of 10 rpm.
- polyesters A and B shown in Table 2 , C was obtained.
- TPA is terephthalic acid
- IPA is isophthalic acid
- AA is acrylic acid
- SA is sebacic acid
- EG ethylene glycol
- CHDM 1,4-cyclohexanedimethanol
- NPG is neopentyl glycol
- BD is 1,4- Butanediol.
- the intrinsic viscosities of the polyesters in Table 2 were 0.53 dl / g for polyester A, 0.98 dl / g for polyester B, and 0.89 dl / g for polyester C. Each polyester was appropriately formed into a chip shape.
- Polypropylene and hydrogenated petroleum resin The following polypropylene and hydrogenated petroleum resin were used.
- Polypropylene Elmodeyu made by Idemitsu Kosan Co., Ltd.
- Hydrogenated petroleum resin Imabu manufactured by Idemitsu Kosan Co., Ltd.
- ⁇ Method for producing heat-shrinkable polyvinyl chloride film 60% by weight of vinyl chloride resin (average polymerization degree 1300), 30% by weight of phthalate ester plasticizer, 6% by weight of MBS resin, 2% by weight of barium-zinc composite stabilizer, 1% of polymethyl methacrylate resin % And 1% by weight of ethylenebisstearic acid amide were mixed to obtain a vinyl chloride resin composition for film molding.
- This raw material formulation is shown in Table 1.
- the vinyl chloride resin composition was melt extruded from a T die of a single screw extruder to obtain an unstretched film. The temperature of the extruder and the T die was adjusted to 200 ° C.
- the helical type and parallel type gear pump was improved between the extruder and the T die.
- the take-up speed of the unstretched film (rotational speed of the metal roll) was about 20 m / min.
- the surface temperature of the metal roll was 20 ° C.
- the thickness of the unstretched film obtained was about 75 ⁇ m.
- the obtained unstretched film was heated to 100 ° C. in a preheating zone, and stretched 5 times in the width direction in a stretching zone having a set temperature of 80 ° C. Subsequently, heat treatment was performed at 88 ° C. for 5 seconds and then cooled.
- a uniaxially stretched film having a thickness of 15 ⁇ m was continuously produced over 1100 m by cutting and removing both edges and winding up into a roll having a width of 500 mm.
- the obtained film was a heat-shrinkable polyvinyl chloride film that thermally shrinks only in the width direction.
- Table 3 shows the hot water heat shrinkage measured at 90 ° C.
- Example 1 A solvent composition prepared by mixing THF / polyester A at 90/10 (weight ratio) was applied to the heat-shrinkable polyvinyl chloride film so that the width was 4 mm and 300 mg / m 2, and the processing speed was 400 m / min. Then, solvent bonding was performed to obtain a tubular label roll. Moreover, the presence or absence of solvent penetration and the peel strength of the solvent adhesion part were measured by the above-described method, and the solvent adhesion conditions and results are shown in Table 4. There was no penetration of the solvent, and the peel strength at the solvent adhesion part was large, so that the label was good.
- Example 2 A tubular label roll was obtained in the same manner as in Example 1 except that MEK / polyester A was mixed at 90/10 (weight ratio) with the mixed solvent composition. The solvent adhesion conditions and results are shown in Table 4. There was no penetration of the solvent, and the peel strength at the solvent adhesion part was large, so that the label was good.
- Example 3 A tubular label roll was obtained in the same manner as in Example 1 except that ethyl acetate / polyester A was mixed at 90/10 (weight ratio) with the mixed solvent composition. The solvent adhesion conditions and results are shown in Table 4. There was no penetration of the solvent, and the peel strength at the solvent adhesion part was large, so that the label was good.
- Example 4 A solvent composition prepared by mixing THF / polyester B at 80/20 (weight ratio) was applied to the heat-shrinkable polyvinyl chloride film so as to have a width of 4 mm and 300 mg / m 2, and a processing speed of 400 m / min. Then, solvent bonding was performed to obtain a tubular label roll. Moreover, the presence or absence of solvent penetration and the peel strength of the solvent adhesion part were measured by the above-described method, and the solvent adhesion conditions and results are shown in Table 4. There was no penetration of the solvent, and the peel strength at the solvent adhesion part was large, so that the label was good.
- Example 5 A solvent composition obtained by mixing THF / polyester C at 95/5 (weight ratio) was applied to the heat-shrinkable polyvinyl chloride film so as to have a width of 4 mm and 300 mg / m 2, and a processing speed of 400 m / min. Then, solvent bonding was performed to obtain a tubular label roll. Moreover, the presence or absence of solvent penetration and the peel strength of the solvent adhesion part were measured by the above-described method, and the solvent adhesion conditions and results are shown in Table 4. There was no penetration of the solvent, and the peel strength at the solvent adhesion part was large, so that the label was good.
- Example 6 A solvent composition prepared by mixing ethyl acetate / polyester A at a ratio of 60/40 (weight ratio) was applied to the heat-shrinkable polyvinyl chloride film so as to be 4 mm wide and 100 mg / m 2. Solvent adhesion was performed in minutes to obtain a tubular label roll. Moreover, the presence or absence of solvent penetration and the peel strength of the solvent adhesion part were measured by the above-described method, and the solvent adhesion conditions and results are shown in Table 4. There was no penetration of the solvent, and the peel strength at the solvent adhesion part was large, so that the label was good.
- Example 7 On the heat-shrinkable polyvinyl chloride film, a solvent composition prepared by mixing ethyl acetate / polyester A at 80/20 (weight ratio) was applied to a width of 4 mm and 500 mg / m 2, and a processing speed of 400 m / m 2 was applied. Solvent adhesion was performed in minutes to obtain a tubular label roll. Moreover, the presence or absence of solvent penetration and the peel strength of the solvent adhesion part were measured by the above-described method, and the solvent adhesion conditions and results are shown in Table 4. There was no penetration of the solvent, and the peel strength at the solvent adhesion part was large, so that the label was good.
- Example 1 A tubular label roll was obtained in the same manner as in Example 6 except that an adhesive solvent containing only ethyl acetate was used. The solvent adhesion conditions and results are shown in Table 4. The peel strength of the solvent-bonded part was low, which was not preferable as a label.
- Comparative Example 2 The heat-shrinkable polyvinyl chloride film was coated with ethyl acetate alone to a width of 4 mm and 600 mg / m 2, and solvent adhesion was performed at a processing speed of 400 m / min to obtain a tube-shaped label roll.
- Example 3 A tubular label roll was obtained in the same manner as in Example 1 except that a solvent composition in which THF / polyester C was mixed at 40/60 (weight ratio) was used. The solvent adhesion conditions and results are shown in Table 4. Since the viscosity of the adhesive solvent composition was too high, the adhesive solvent composition could not be applied to the film at 4 mm width and 1 g / m 2 or less.
- Example 8 A solvent composition prepared by mixing THF / polypropylene (S-901) at 90/10 (weight ratio) was applied to the heat-shrinkable polyvinyl chloride film so as to have a width of 4 mm and 300 mg / m 2. Solvent adhesion was performed at a speed of 400 m / min to obtain a tubular label roll. Further, the presence or absence of solvent penetration and the peel strength of the solvent adhesion portion were measured by the above-described method, and the solvent adhesion conditions and results are shown in Table 5. There was no penetration of the solvent, and the peel strength at the solvent adhesion part was large, so that the label was good.
- Example 9 A tubular label roll was obtained in the same manner as in Example 8, except that MEK / S-901 was mixed at 90/10 (weight ratio) with the mixed solvent composition. The solvent adhesion conditions and results are shown in Table 5. There was no penetration of the solvent, and the peel strength at the solvent adhesion part was large, so that the label was good.
- Example 10 A tubular label roll was obtained in the same manner as in Example 8 except that the mixed solvent composition was mixed with ethyl acetate / S-901 at 90/10 (weight ratio). The solvent adhesion conditions and results are shown in Table 5. There was no penetration of the solvent, and the peel strength at the solvent adhesion part was large, so that the label was good.
- Example 11 A solvent composition prepared by mixing 95/5 (weight ratio) of ethyl acetate / hydrogenated petroleum resin (P-140) with the heat-shrinkable polyvinyl chloride film so as to have a width of 4 mg and 300 mg / m 2. It apply
- Example 12 A solvent composition prepared by mixing 70/30 (weight ratio) of ethyl acetate / S-901 was applied to the heat-shrinkable polyvinyl chloride film so as to have a width of 4 mm and 300 mg / m 2, and a processing speed of 400 m. Solvent adhesion was performed at a rate of / min to obtain a tubular label roll. Further, the presence or absence of solvent penetration and the peel strength of the solvent adhesion portion were measured by the above-described method, and the solvent adhesion conditions and results are shown in Table 5. There was no penetration of the solvent, and the peel strength at the solvent adhesion part was large, so that the label was good.
- Example 13 A solvent composition prepared by mixing ethyl acetate / S-901 at a ratio of 70/30 (weight ratio) was applied to the heat-shrinkable polyvinyl chloride film so as to have a width of 4 mm and 100 mg / m 2, and a processing speed of 400 m. Solvent adhesion was performed at a rate of / min to obtain a tubular label roll. Further, the presence or absence of solvent penetration and the peel strength of the solvent adhesion portion were measured by the above-described method, and the solvent adhesion conditions and results are shown in Table 5. There was no penetration of the solvent, and the peel strength at the solvent adhesion part was large, so that the label was good.
- Example 4 A tubular label roll was obtained in the same manner as in Example 1 except that a solvent composition in which THF / P-140 was mixed at 40/60 (weight ratio) was used. The solvent adhesion conditions and results are shown in Table 3. Since the viscosity of the adhesive solvent composition was too high, the adhesive solvent composition could not be applied to the film at 4 mm width and 1 g / m 2 or less.
- the chips 1, 2, and 3 were each preliminarily dried using a blender apparatus, and then the chips 1, 2, and 3 were continuously and separately supplied into the mixing mixer with a metering screw feeder.
- the supply amount of the chip 1 was 43 mass%
- the supply amount of the chip 2 was 43 mass%
- the supply amount of the chip 3 was 14 mass%.
- Table 1 shows the contents of the raw material chips. Thereafter, the mixed raw materials of chips 1, 2, and 3 mixed in the mixing mixer were continuously and separately supplied to the hopper immediately above the extruder by a quantitative screw feeder.
- the supplied chips 1, 2, 3 (mixed ones) were melt-extruded from a T-die of a single-screw extruder.
- the temperature of the extruder was also adjusted to 200 ° C.
- a helical type and parallel type gear pump was interposed between the extruder and the T die.
- the take-up speed of the unstretched film was about 20 m / min.
- the surface temperature of the metal roll was 20 ° C., and the thickness of the obtained unstretched film was 150 ⁇ m.
- the film was stretched 1.5 times in the longitudinal (longitudinal) direction using the speed difference of the roll.
- the obtained film uniaxially stretched in the longitudinal direction was heated to 100 ° C. in a preheating zone, and stretched 5 times in the width direction in a stretching zone having a set temperature of 80 ° C.
- heat treatment was performed at 88 ° C. for 5 seconds and then cooled. Both edge portions were cut and removed, and rolled into a roll having a width of 500 mm, whereby a laterally uniaxially stretched film having a thickness of 20 ⁇ m was continuously produced over 1100 m.
- the obtained film was a heat-shrinkable polystyrene film that thermally shrinks only in the width direction. Table 6 shows the hot water heat shrinkage measured at 90 ° C.
- Example 14 A solvent composition prepared by mixing THF / polyester A at 90/10 (weight ratio) was applied to the heat-shrinkable polystyrene film so as to have a width of 4 mm and 250 mg / m 2, and the solvent was processed at a processing speed of 400 m / min. Bonding was performed to obtain a tubular label roll. Further, the presence or absence of solvent penetration and the peel strength of the solvent adhesion part were measured by the above-described method, and the solvent adhesion conditions and results are shown in Table 8. There was no penetration of the solvent, and the peel strength at the solvent adhesion part was large, so that the label was good.
- Example 15 A tubular label roll was obtained in the same manner as in Example 14 except that MEK / polyester A was mixed at 90/10 (weight ratio) with the mixed solvent composition.
- the solvent adhesion conditions and results are shown in Table 8. There was no penetration of the solvent, and the peel strength at the solvent adhesion part was large, so that the label was good.
- Example 16 A tubular label roll was obtained in the same manner as in Example 14 except that ethyl acetate / polyester A was mixed at 90/10 (weight ratio) with the mixed solvent composition. The solvent adhesion conditions and results are shown in Table 8. There was no penetration of the solvent, and the peel strength at the solvent adhesion part was large, so that the label was good.
- Example 17 A solvent composition prepared by mixing THF / polyester B at 80/20 (weight ratio) was applied to the heat-shrinkable polystyrene film so as to have a width of 4 mm and 250 mg / m 2, and the solvent was processed at a processing speed of 400 m / min. Bonding was performed to obtain a tubular label roll.
- Example 18 A solvent composition prepared by mixing THF / polyester C at 95/5 (weight ratio) was applied to the heat-shrinkable polystyrene film so as to be 4 mm wide and 250 mg / m 2, and the solvent was processed at a processing speed of 400 m / min. Bonding was performed to obtain a tubular label roll. Further, the presence or absence of solvent penetration and the peel strength of the solvent adhesion part were measured by the above-described method, and the solvent adhesion conditions and results are shown in Table 8. There was no penetration of the solvent, and the peel strength at the solvent adhesion part was large, so that the label was good.
- Example 19 A solvent composition prepared by mixing ethyl acetate / polyester A at a ratio of 60/40 (weight ratio) was applied to the heat-shrinkable polystyrene film so as to be 4 mm wide and 100 mg / m 2, and at a processing speed of 400 m / min. Solvent bonding was performed to obtain a tubular label roll. Further, the presence or absence of solvent penetration and the peel strength of the solvent adhesion part were measured by the above-described method, and the solvent adhesion conditions and results are shown in Table 8. There was no penetration of the solvent, and the peel strength at the solvent adhesion part was large, so that the label was good.
- Example 20 On the heat-shrinkable polystyrene film, a solvent composition prepared by mixing ethyl acetate / polyester A at 80/20 (weight ratio) was applied so as to be 4 mm wide and 400 mg / m 2, and at a processing speed of 400 m / min. Solvent bonding was performed to obtain a tubular label roll. Further, the presence or absence of solvent penetration and the peel strength of the solvent adhesion part were measured by the above-described method, and the solvent adhesion conditions and results are shown in Table 8. There was no penetration of the solvent, and the peel strength at the solvent adhesion part was large, so that the label was good.
- Example 5 A tubular label roll was obtained in the same manner as in Example 19 except that an adhesive solvent containing only ethyl acetate was used. The solvent adhesion conditions and results are shown in Table 4. The peel strength of the solvent-bonded part was low, which was not preferable as a label.
- Comparative Example 6 The heat-shrinkable polystyrene film was coated with ethyl acetate alone at a width of 4 mm so as to be 450 mg / m 2, and solvent adhesion was performed at a processing speed of 400 m / min to obtain a tubular label roll.
- Example 21 A solvent composition obtained by mixing THF / polypropylene (S-901) at 90/10 (weight ratio) was applied to the heat-shrinkable polystyrene film so that the width was 4 mm and 250 mg / m 2, and the processing speed was 400 m. Solvent adhesion was performed at a rate of / min to obtain a tubular label roll. Further, the presence or absence of solvent penetration and the peel strength of the solvent adhesion part were measured by the above-described method, and the solvent adhesion conditions and results are shown in Table 9. There was no penetration of the solvent, and the peel strength at the solvent adhesion part was large, so that the label was good.
- Example 22 A tubular label roll was obtained in the same manner as in Example 21 except that the mixed solvent composition was mixed with MEK / S-901 at 90/10 (weight ratio). The solvent adhesion conditions and results are shown in Table 9. There was no penetration of the solvent, and the peel strength at the solvent adhesion part was large, so that the label was good.
- Example 23 A tubular label roll was obtained in the same manner as in Example 21, except that the mixed solvent composition was mixed with ethyl acetate / S-901 at 90/10 (weight ratio). The solvent adhesion conditions and results are shown in Table 9. There was no penetration of the solvent, and the peel strength at the solvent adhesion part was large, so that the label was good.
- Example 24 A solvent composition in which ethyl acetate / hydrogenated petroleum resin (P-140) was mixed at 95/5 (weight ratio) was applied to the heat-shrinkable polystyrene film so as to have a width of 4 mm and 250 mg / m 2.
- solvent adhesion was performed at a processing speed of 400 m / min to obtain a tubular label roll. Further, the presence or absence of solvent penetration and the peel strength of the solvent adhesion part were measured by the above-described method, and the solvent adhesion conditions and results are shown in Table 9. There was no penetration of the solvent, and the peel strength at the solvent adhesion part was large, so that the label was good.
- Example 25 A solvent composition prepared by mixing ethyl acetate / S-901 at a ratio of 70/30 (weight ratio) was applied to the heat-shrinkable polystyrene film so as to have a width of 4 mm and 250 mg / m 2, and a processing speed of 400 m / min. Then, solvent bonding was performed to obtain a tubular label roll. Further, the presence or absence of solvent penetration and the peel strength of the solvent adhesion part were measured by the above-described method, and the solvent adhesion conditions and results are shown in Table 9. There was no penetration of the solvent, and the peel strength at the solvent adhesion part was large, so that the label was good.
- Example 26 A solvent composition in which ethyl acetate / S-901 was mixed at 70/30 (weight ratio) was applied to the heat-shrinkable polystyrene film so as to be 4 mm wide and 100 mg / m 2, and the processing speed was 400 m / min. Then, solvent bonding was performed to obtain a tubular label roll. Further, the presence or absence of solvent penetration and the peel strength of the solvent adhesion part were measured by the above-described method, and the solvent adhesion conditions and results are shown in Table 9. There was no penetration of the solvent, and the peel strength at the solvent adhesion part was large, so that the label was good.
- Example 8 A tubular label roll was obtained in the same manner as in Example 1 except that an adhesive solvent composition in which THF / P-140 was mixed at 40/60 (weight ratio) was used. The solvent adhesion conditions and results are shown in Table 9. Since the viscosity of the adhesive solvent composition was too high, the adhesive solvent composition could not be applied to the film at 4 mm width and 1 g / m 2 or less.
- the heat-shrinkable label of the present invention has a high peel strength at the solvent-adhered portion even when the amount of the solvent fluctuates in the process of adhering the heat-shrinkable polyvinyl chloride film or heat-shrinkable polystyrene film into a ring shape. It is difficult to penetrate through the solvent (blocking) and has high industrial utility value.
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Abstract
Description
は多く使用されている。
ところで、熱収縮性フィルムからチューブ状ラベルを形成するには、フィルムの幅方向片端部をもう一方の端部に重ねて固定する必要がある。この固定方法としては、従来から、溶剤接着法(特許文献1、2)や接着剤を使用する方法(特許文献3)等が用いられてきた。それらの中でも溶剤接着法は高速でチューブ状ラベルへの加工が可能であり、広く用いられている。
しかしTHF、MEK、酢酸エチルでは、厚みが薄く非晶原料が多い熱収縮性ポリ塩化ビニル系フィルム又は熱収縮性ポリスチレン系フィルムの場合、塗布面側からフィルム裏面側まで溶剤が浸透してしまい(溶剤突き抜け)、裏面にも溶剤が付着する。その結果、溶剤接着後のチューブ状ラベルをロール状に巻き取る際にはチューブ状ラベルが平らにつぶされるが、溶剤接着部に溶剤突き抜けが起こっている場合、溶剤接着部の裏側と接触したラベルが接着してしまい、チューブとして機能しなくなったり、ブロッキングを起こしてロールの解きほぐしができなくなったりすることがあった。
即ち、本発明は、以下の構成をとる。
2.前記溶剤組成物に含まれる樹脂がポリエステルであり、該樹脂の含有量が5重量%以上40重量%以下である1に記載の熱収縮性ラベル。
3.前記溶剤組成物に含まれる樹脂がポリプロピレン又は水添石油樹脂であり、該樹脂の含有量が5重量%以上40重量%以下である1に記載の熱収縮性ラベル。
4.前記熱収縮性ポリ塩化ビニル系フィルム又は熱収縮性ポリスチレン系フィルムの厚みが5μm以上50μm以下である1~3のいずれかに記載の熱収縮性ポリ塩化ビニル系ラベル。
5.前記1~4のいずれかに記載の熱収縮性ラベルを包装対象物の外周の少なくとも一部に有することを特徴とする包装体。
6.テトラヒドロフラン(THF)、メチルエチルケトン(MEK)、及び酢酸エチルからなる群より選択される少なくとも1種以上の有機溶剤と、ポリエステル、ポリプロピレン、及び水添石油樹脂からなる群より選択される少なくとも1種以上の樹脂を含む溶剤組成物によって、熱収縮性ポリ塩化ビニル系フィルム又は熱収縮性ポリスチレン系フィルムの両端部同士を重ねて接着することを特徴とする熱収縮性ラベルの製造方法。
7.テトラヒドロフラン(THF)、メチルエチルケトン(MEK)、及び酢酸エチルからなる群より選択される少なくとも1種以上の有機溶剤と、ポリエステル、ポリプロピレン、及び水添石油樹脂からなる群より選択される少なくとも1種以上の樹脂を少なくとも含む溶剤組成物で、該溶剤組成物によって熱収縮性ポリ塩化ビニル系フィルム又は熱収縮性ポリスチレン系フィルムを接着して熱収縮性ラベルを作成するために用いられることを特徴とする、熱収縮性ラベル用溶剤組成物。
即ち、良溶媒であるTHF、MEK、及び酢酸エチルからなる群より選択される少なくとも1種以上の有機溶剤と、接着剤として機能するポリエステル、ポリプロピレン及び水添石油樹脂なる群より選択される少なくとも1種以上の樹脂の両方を溶剤組成物に含むことで、それぞれの上記欠点をカバーし、高速化したチュービング工程でも、安定的に高い剥離強度を発現することが可能になる。また薄肉化した熱収縮性ポリ塩化ビニル系フィルム又は熱収縮性ポリスチレン系フィルムであっても、溶剤突き抜けが生じがたくなる。
溶剤組成物に用いるポリエステルを構成するエチレングリコール以外の他のジオール成分としては、1,3-プロパンジオール、1,4-ブタンジオール、ネオペンチルグリコール、ヘキサンジオール等の脂肪族ジオール、1,4-シクロヘキサンジメタノール等の脂環式ジオール、ビスフェノールA等の芳香族系ジオール等を挙げることができる。
非晶質成分となり得るモノマーとしては、例えば、イソフタル酸、オルトフタル酸、アジピン酸、セバシン酸、1,4-シクロヘキサンジメタノール、ネオペンチルグリコール、1,3-プロパンジオール、1,4-ブタンジオール、ヘキサンジオールを挙げることができる。
また、溶剤組成物の粘度は、下限は特に限定されないが、粘度が高すぎると、高速化されたチュービング工程において安定的に一定量を塗布することが困難になるため、100mPa・s未満が好ましい。溶剤組成物の粘度は、より好ましくは、80mPa・s以下、さらに好ましくは60mPa・s以下、特に好ましくは50mPa・s以下である。
チュービング工程に際しては、溶剤組成物を熱収縮性ポリ塩化ビニル系フィルム又は熱収縮性ポリスチレン系フィルムに対し、50~550mg/m2程度で、公知のセンターシールマシン等を用いて塗布することが好ましい。また、チュービング工程での接着溶剤組成物の塗布幅は、接着部の剥がれを抑制するためにも1mm以上が好ましく、上限は特に限定されないが、使用するラベル面積は小さいほどコストも小さくなるため、10mm以下が好ましい。
本発明の熱収縮性ラベルは、溶剤接着部の剥離強度が2N/15mm以上、好ましくは3N/15mm以上、より好ましくは4N/15mm以上である。剥離強度が2N/15mm以上あれば、使用中に剥離する等のトラブルを防ぐことができる。また、溶剤接着部の剥離強度の上限は10N/15mm未満である。剥離強度が高いほど好ましいが、本発明では10N/15mm以上の剥離強度を実現できなかったためである。剥離強度の測定方法は、実施例に記載の方法に従う。
本発明の熱収縮性ラベルは、90℃の温水中10秒での熱収縮率が主収縮方向で40%以上であることが好ましい。熱収縮率が40%以上あれば、美麗な収縮仕上がり性を得ることができる。40%より小さいと、熱収縮力が不足して、容器等に被覆収縮させたときに、容器に密着せず、外観不良が発生するため好ましくない。主収縮方向に直交する方向においては、90℃の温水中での熱収縮率は15%以下であることが好ましい。15%を超えると、ラベル縦方向が縮んでしまうタテヒケと呼ばれる現象が起こりやすいため好ましくない。なお、主収縮方向の熱収縮率とは、試料の最も多く収縮した方向での熱収縮率の意味であり、主収縮方向は、正方形の試料の縦方向または横方向の長さで決められる。熱収縮率(%)の測定方法は実施例に記載の方法に従う。
本発明において用いられる可塑剤としては、例えばジ‐n‐オクチルフタレート、ジ‐2‐エチルヘキシルフタレート、ジイソノニルフタレート、ジイソデシルフタレート、ジシクロヘキシルフタレートなどのフタル酸誘導体、ジイソオクチルイソフタレートなどのイソフタル酸誘導体、ジオクチルアジペートなどのアジピン酸誘導体、その他リン酸トリクレジル、リン酸トリキシレニル、エポキシ化大豆油などが挙げられる。
一方、ゴム成分としては、スチレン系化合物をその構成成分として含有するゴム状共重合体が好ましく、スチレンとゴム成分からそれぞれ一種以上を選んで共重合したランダム、ブロックまたはグラフト共重合体を挙げることができる。このようなゴム状共重合体としては、たとえばスチレン-ブタジエン共重合体ゴム、スチレン-イソプレンブロック共重合体、それらのブタジエン部分の一部あるいは全部を水素化したゴム、アクリル酸メチル-ブタジエン-スチレン共重合体ゴム、アクリロニトリル-ブタジエン-スチレン共重合体ゴム、アクリロニトリル-アルキルアクリレート-ブタジエン-スチレン共重合体ゴム、メタクリル酸メチル-アルキルアクリレート-ブタジエン-スチレン共重合体ゴム等を挙げることができる。上記したスチレン系化合物をその構成成分として含有するゴム状共重合体は、スチレン単位を有するため、シンジオタクチック構造を有するポリスチレン系樹脂に対する分散性が良好であり、ポリスチレン系樹脂に対する可塑性改良効果が大きい。また、相溶性調整剤としては、上記したスチレン系化合物をその構成成分として含有するゴム状共重合体を好適に用いることができる。
ポリスチレン系樹脂は、各種メーカーにより、種々のグレードのものが市販されており、市販のものを使用してもよい。他の層は、1層であっても2層以上でも構わない。
原料樹脂を溶融押し出しする際には、ポリ塩化ビニル原料を押出機を利用して、150~200℃の温度で溶融しフィルム状に押し出す。押し出しに際しては、Tダイ法、チューブラー法等、既存の任意の方法を採用することができる。
そして、押し出し後のシート状の溶融樹脂を急冷することによって未延伸フィルムを得ることができる。なお、溶融樹脂を急冷する方法としては、溶融樹脂を口金から回転ドラム上にキャストして急冷固化することにより実質的に未配向の樹脂シートを得る方法を好適に採用することができる。
得られた未延伸フィルムは、必要により80~120℃、好ましくは90~110℃で予熱した後、横方向(押し出し方向に対して直交する方向)にテンター等で3.0倍以上、好ましくは3.5倍以上7倍以下に延伸する。延伸温度は、70℃以上110℃以下、好ましくは80℃以上100℃以下である。
また、横延伸後は、延伸温度より1℃~30℃高い温度で、熱処理することが好ましい。熱処理は、延伸後のフィルムの緊張状態を緩和するために行われ、熱処理時の温度で熱収縮率の調整を行い、また自然収縮率を減少させるのにも効果がある。これにより、本発明の熱収縮性ラベルを構成する熱収縮性ポリ塩化ビニル系フィルムが得られる。
原料樹脂を溶融押し出しする際には、ポリスチレン原料を押出機を利用して、200~250℃の温度で溶融しフィルム状に押し出す。押し出しに際しては、Tダイ法、チューブラー法等、既存の任意の方法を採用することができる。
そして、押し出し後のシート状の溶融樹脂を急冷することによって未延伸フィルムを得ることができる。なお、溶融樹脂を急冷する方法としては、溶融樹脂を口金から回転ドラム上にキャストして急冷固化することにより実質的に未配向の樹脂シートを得る方法を好適に採用することができる。
得られた未延伸フィルムは、必要によりロールで70~100℃、好ましくは80~90℃で加熱された後、1.1~1.8倍にロールの速度差を用いて縦延伸される。得られた縦延伸後のフィルムは、必要により80~120℃、好ましくは90~110℃で予熱した後、横方向(押し出し方向に対して直交する方向)にテンター等で3.0倍以上、好ましくは3.5倍以上7倍以下に延伸する。延伸温度は、70℃以上100℃以下、好ましくは70℃以上95℃以下である。
また、横延伸後は、延伸温度より1℃~30℃高い温度で、熱処理することが好ましい。熱処理は、延伸後のフィルムの緊張状態を緩和するために行われ、熱処理時の温度で熱収縮率の調整を行い、また自然収縮率を減少させるのにも効果がある。これにより、本発明の熱収縮性ラベルを構成する熱収縮性ポリスチレン系フィルムが得られる。
上記ラベルに対し公知の方法によりミシン目を形成した後、PETボトルに被せ、当該PETボトルをベルトコンベアー等にのせて、スチームを吹きつけるタイプの収縮トンネル(スチームトンネル)または、熱風を吹きつけるタイプの収縮トンネル(熱風トンネル)の内部を通過させる。これらのトンネル通過時にラベルが熱収縮することにより、ラベルがペットボトル等のボトル容器に装着される。
本発明の包装体は、好ましくは本発明の熱収縮性ポリ塩化ビニル系フィルム又は熱収縮性ポリスチレン系フィルムから得られたミシン目またはノッチを有するラベルが、包装対象物の少なくとも外周の一部に被覆して熱収縮させて形成されるものである。包装対象物としては、飲料用のPETボトルを始め、各種の瓶、缶、菓子や弁当等のプラスチック容器、紙製の箱等を挙げることができる。なお、通常、それらの包装対象物に、熱収縮性ポリ塩化ビニル系フィルムから得られるラベルを熱収縮させて被覆させる場合には、当該ラベルを約5~70%程度熱収縮させて包装体に密着させる。なお、包装対象物に被覆されるラベルには、印刷が施されていても良いし、印刷が施されていなくても良い。
[温湯熱収縮率]
フィルムを長手方向およびその直交方向(幅方向)に沿うように10cm×10cmの正方形に裁断し、90℃±0.5℃の温水中に、無荷重状態で10秒間浸漬して熱収縮させた後、直ちに25℃±0.5℃の水中に10秒浸漬した後、水中から引き出して、試料の縦および横方向の長さを測定し、下記式に従って求めた値である。
収縮率={(収縮前の長さ-収縮後の長さ)/収縮前の長さ}×100(%)
本実施例では、フィルムの最も収縮率の大きい方向(主収縮方向)は幅方向である。
[ガラス転移点(Tg)]
セイコー電子工業株式会社製の示差走査熱量計(型式:DSC220)を用いて、JIS K7121に従って求めた。未延伸フィルム10mgを、25℃から120℃まで昇温速度10℃/分で昇温し、昇温プロファイルを得た。ガラス転移温度以下のベースラインの延長線と遷移部における最大傾斜を示す接線との交点の温度をガラス転移温度とした。
フィルムを幅380mmに裁断しながら、長手方向の巻長1000mとしてフィルムロールを製造した。そのフィルムロールからフィルムを繰り出して、フィルム幅方向の片端部の内側に接着用溶剤組成物を塗布幅が4±2mmの範囲内となるように長手方向に連続的に塗布し、この溶剤組成物塗布部をフィルムのもう一方の幅方向端部の上に、重なり部がセンターに来るようにフィルムを折り重ねて、溶剤接着した。
剤接着加工速度は400m/分とし、溶剤接着後のフィルムを同速度で紙管に巻き取った。得られたチューブ状ラベルのロールを23℃の雰囲気下で24時間エージングした。
また溶剤の塗布量は任意により調整を行っている。
[接着溶剤組成物の粘度]
株式会社アタゴ製のB型粘度計(型式:BASE L)を用いて、接着溶剤組成物温度23℃、回転数10rpmの条件で測定を行った。
溶剤接着して得られた巻長1000mのチューブ状ラベルを、30℃・湿度80%の環境試験室で336時間(14日間)エージングした。その後ロール表面から500m引き出し、ブロッキング現象があったときは溶剤が突き抜けていると判断し、以下のように評価した。
ブロッキングなし:溶剤の突き抜け性評価 ○(突き抜けなし)
ブロッキングあり:溶剤の突き抜け性評価 ×(突き抜けあり)
上記した溶剤突き抜け評価時にロール表層から500m引き出した後の巻長500mのチューブ状ラベルロールの表層部分から、溶剤接着部が中央に来るように幅(長手方向長さに相当)15mmの試料を円周方向に沿って切り出した(長さは100mm程度あればよい)。試料数nは10とした。ボールドウィン社製の万能引張試験機「STM-50」にセットし、引張速度200mm/分の条件で180°ピール試験を行った。10個の試料の平均値を溶剤接着部の剥離強度(N/15mm)とした。
撹拌機、温度計および部分環流式冷却器を備えたステンレススチール製オートクレーブに、ジカルボン酸成分としてジメチルテレフタレート(DMT)100モル%と、多価アルコール成分としてエチレングリコール(EG)100モル%とを、エチレングリコールがモル比でジメチルテレフタレートの2.2倍になるように仕込み、エステル交換触媒として酢酸亜鉛を0.05モル%(酸成分に対して)用いて、生成するメタノールを系外へ留去しながらエステル交換反応を行った。その後、重縮合触媒として三酸化アンチモン0.225モル%(酸成分に対して)を添加し、280℃で26.7Paの減圧条件下、重縮合反応を行い、表2に示すポリエステルA、B、Cを得た。
表中、TPAはテレフタル酸、IPAはイソフタル酸、AAはアクリル酸、SAはセバシン酸、EGはエチレングリコール、CHDMは1,4-シクロヘキサンジメタノール、NPGはネオペンチルグリコール、BDは1,4-ブタンジオールである。表2のポリエステルの固有粘度は、ポリエステルAが0.53dl/g、ポリエステルBが0.98dl/g、ポリエステルCが0.89dl/gであった。なお、各ポリエステルは適宜チップ状にした。
下記に示すポリプロピレンおよび水添石油樹脂を用いて行った。
ポリプロプレン:出光興産(株)製のエルモーデユ 商品名S-901
水添石油樹脂:出光興産(株)製のアイマーブ 商品名P-140
塩化ビニル系樹脂(平均重合度1300)を60重量%、フタル酸エステル系可塑剤30重量%、MBS樹脂6重量%、バリウム―亜鉛系複合安定化剤2重量%、ポリメタクリル酸メチル樹脂1重量%、エチレンビスステアリン酸アミド1重量%を混合してフィルム成形用塩化ビニル系樹脂組成物とした。この原料処方を表1に示す。上記塩化ビニル系樹脂組成物を単軸式押出機のTダイから溶融押し出し未延伸フィルムを得た。なお、押出機とTダイの温度は200℃に調整した。また、Tダイからの押出を安定させるために、押出機とTダイとの間にヘリカルタイプかつ並列タイプのギアポンプを改善させた。このとき未延伸フィルムの引き取り速度(金属ロールの回転速度)は、約20m/minであった。また金属ロールの表面温度は20℃で得られた未延伸フィルムの厚みは約75μmであった。
得られた未延伸フィルムを、予熱ゾーンで100℃に加熱し、80℃の設定温度の延伸ゾーンで幅方向に5倍延伸した。続いて88℃で5秒間熱処理を行って、その後冷却した。両縁部を裁断除去して幅500mmでロール状に巻き取ることによって、厚さ15μmの一軸延伸フィルムを1100mに亘って連続的に製造した。得られたフィルムは幅方向にのみ熱収縮する熱収縮性ポリ塩化ビニル系フィルムであった。90℃で測定した温湯熱収縮率を表3に示した。
前記熱収縮性ポリ塩化ビニル系フィルムに、THF/ポリエステルAを90/10(重量比)で混合した溶剤組成物を4mm幅で、300mg/m2となるように塗布し、加工速度400m/分で溶剤接着を行い、チューブ状ラベルロールを得た。また、上記した方法で、溶剤突き抜けの有無、溶剤接着部の剥離強度を測定し、溶剤接着条件および結果を表4に示した。溶剤の突き抜けがなく、溶剤接着部の剥離強度が大きく、良好なラベルであった。
[実施例2]
混合した溶剤組成物をMEK/ポリエステルAを90/10(重量比)で混合した以外は、実施例1と同様にして、チューブ状ラベルロールを得た。溶剤接着条件および結果を表4に示した。溶剤の突き抜けがなく、溶剤接着部の剥離強度が大きく、良好なラベルであった。
[実施例3]
混合した溶剤組成物を酢酸エチル/ポリエステルAを90/10(重量比)で混合した以外は、実施例1と同様にして、チューブ状ラベルロールを得た。溶剤接着条件および結果を表4に示した。溶剤の突き抜けがなく、溶剤接着部の剥離強度が大きく、良好なラベルであった。
前記熱収縮性ポリ塩化ビニル系フィルムに、THF/ポリエステルBを80/20(重量比)で混合した溶剤組成物を4mm幅で、300mg/m2となるように塗布し、加工速度400m/分で溶剤接
着を行い、チューブ状ラベルロールを得た。また、上記した方法で、溶剤突き抜けの有無、溶剤接着部の剥離強度を測定し、溶剤接着条件および結果を表4に示した。溶剤の突き抜けがなく、溶剤接着部の剥離強度が大きく、良好なラベルであった。
[実施例5]
前記熱収縮性ポリ塩化ビニル系フィルムに、THF/ポリエステルCを95/5(重量比)で混合した溶剤組成物を4mm幅で、300mg/m2となるように塗布し、加工速度400m/分で溶剤接着を行い、チューブ状ラベルロールを得た。また、上記した方法で、溶剤突き抜けの有無、溶剤接着部の剥離強度を測定し、溶剤接着条件および結果を表4に示した。溶剤の突き抜けがなく、溶剤接着部の剥離強度が大きく、良好なラベルであった。
[実施例6]
前記熱収縮性ポリ塩化ビニル系フィルムに、酢酸エチル/ポリエステルAを60/40(重量比)で混合した溶剤組成物を4mm幅で、100mg/m2となるように塗布し、加工速度400m/分で溶剤接着を行い、チューブ状ラベルロールを得た。また、上記した方法で、溶剤突き抜けの有無、溶剤接着部の剥離強度を測定し、溶剤接着条件および結果を表4に示した。溶剤の突き抜けがなく、溶剤接着部の剥離強度が大きく、良好なラベルであった。
[実施例7]
前記熱収縮性ポリ塩化ビニル系フィルムに、酢酸エチル/ポリエステルAを80/20(重量比)で混合した溶剤組成物を4mm幅で、500mg/m2となるように塗布し、加工速度400m/分で溶剤接着を行い、チューブ状ラベルロールを得た。また、上記した方法で、溶剤突き抜けの有無、溶剤接着部の剥離強度を測定し、溶剤接着条件および結果を表4に示した。溶剤の突き抜けがなく、溶剤接着部の剥離強度が大きく、良好なラベルであった。
酢酸エチルのみの接着溶剤を用いた以外は実施例6と同様にして、チューブ状ラベルロールを得た。溶剤接着条件および結果を表4に示した。溶剤接着部の剥離強度が低く、ラベルとしては好ましくないものであった。
[比較例2]
前記熱収縮性ポリ塩化ビニル系フィルムに、酢酸エチルのみで4mm幅で、600mg/m2となるように塗布し、加工速度400m/分で溶剤接着を行い、チューブ状ラベルロールを得た。また、上記した方法で、溶剤突き抜けの有無、溶剤接着部の剥離強度を測定し、溶剤接着条件および結果を表4に示した。溶剤接着部の剥離強度が大きかったが、溶剤の突き抜け(ブロッキング)があり、ラベルとしては好ましくないものであった。
[比較例3]
THF/ポリエステルCを40/60(重量比)で混合した溶剤組成物を用いた以外は実施例1と同様にして、チューブ状ラベルロールを得ようとした。溶剤接着条件および結果を表4に示した。接着溶剤組成物の粘度が高すぎるため、フィルムに接着溶剤組成物を4mm幅で、1g/m2以下となるように塗布できなかった。
前記熱収縮性ポリ塩化ビニル系フィルムに、THF/ポリプロピレン(S-901)を90/10(重量比)で混合した溶剤組成物を4mm幅で、300mg/m2となるように塗布し、加工速度400m/分で溶剤接着を行い、チューブ状ラベルロールを得た。また、上記した方法で、溶剤突き抜けの有無、溶剤接着部の剥離強度を測定し、溶剤接着条件および結果を表5に示した。溶剤の突き抜けがなく、溶剤接着部の剥離強度が大きく、良好なラベルであった。
[実施例9]
混合した溶剤組成物をMEK/S-901を90/10(重量比)で混合した以外は、実施例8と同様にして、チューブ状ラベルロールを得た。溶剤接着条件および結果を表5に示した。溶剤の突き抜けがなく、溶剤接着部の剥離強度が大きく、良好なラベルであった。
[実施例10]
混合した溶剤組成物を酢酸エチル/S-901を90/10(重量比)で混合した以外は、実施例8と同様にして、チューブ状ラベルロールを得た。溶剤接着条件および結果を表5に示した。溶剤の突き抜けがなく、溶剤接着部の剥離強度が大きく、良好なラベルであった。
前記熱収縮性ポリ塩化ビニル系フィルムに、酢酸エチル/水添石油樹脂 (P-140)を95/5(重量比)で混合した溶剤組成物を4mm幅で、300mg/m2となるように塗布し、加工速度400m/分で溶剤接着を行い、チューブ状ラベルロールを得た。また、上記した方法で、溶剤突き抜けの有無、溶剤接着部の剥離強度を測定し、溶剤接着条件および結果を表5に示した。溶剤の突き抜けがなく、溶剤接着部の剥離強度が大きく、良好なラベルであった。
[実施例12]
前記熱収縮性ポリ塩化ビニル系フィルムに、酢酸エチル/S-901を70/30(重量比)で混合した溶剤組成物を4mm幅で、300mg/m2となるように塗布し、加工速度400m/分で溶剤接着を行い、チューブ状ラベルロールを得た。また、上記した方法で、溶剤突き抜けの有無、溶剤接着部の剥離強度を測定し、溶剤接着条件および結果を表5に示した。溶剤の突き抜けがなく、溶剤接着部の剥離強度が大きく、良好なラベルであった。
[実施例13]
前記熱収縮性ポリ塩化ビニル系フィルムに、酢酸エチル/S-901を70/30(重量比)で混合した溶剤組成物を4mm幅で、100mg/m2となるように塗布し、加工速度400m/分で溶剤接着を行い、チューブ状ラベルロールを得た。また、上記した方法で、溶剤突き抜けの有無、溶剤接着部の剥離強度を測定し、溶剤接着条件および結果を表5に示した。溶剤の突き抜けがなく、溶剤接着部の剥離強度が大きく、良好なラベルであった。
THF/P-140を40/60(重量比)で混合した溶剤組成物を用いた以外は実施例1と同様にして、チューブ状ラベルロールを得ようとした。溶剤接着条件および結果を表3に示した。接着溶剤組成物の粘度が高すぎるため、フィルムに接着溶剤組成物を4mm幅で、1g/m2以下となるように塗布できなかった。
チップ1,2,3を、それぞれ、ブレンダー装置を用いて予備乾燥した後、それらのチップ1,2,3を、混合ミキサー内へ、定量スクリューフィーダーで連続的に別々に供給した。なお、チップ1の供給量を43質量%部とし、チップ2の供給量を43質量%部とし、チップ3の供給量を14質量%部とした。これの原料チップの内容を表1に示す。その後、混合ミキサー内で混合したチップ1,2,3の混合原料を、押出機の直上のホッパに、定量スクリューフィーダーで連続的に別々に供給した。そして、供給されたチップ1,2,3(混合済みのもの)を、単軸式の押出機のTダイから溶融押出しした。なお、押出機の温度も200℃に調整した。また、Tダイからの押出を安定させるために、押出機とTダイとの間にヘリカルタイプかつ並列タイプのギアポンプを介在させた。このときの未延伸フィルムの引取速度(金属ロールの回転速度)は、約20m/minであった。また金属ロールの表面温度は20℃で、得られた未延伸フィルムの厚みは150μmであった。
得られた表面温度80℃の金属ロールで加熱後にロールの速度差を用いて長手(縦)方向に1.5倍延伸した。
次に得られた縦方向に一軸延伸したフィルムを、予熱ゾーンで100℃に加熱し、80℃の設定温度の延伸ゾーンで幅方向に5倍延伸した。続いて88℃で5秒間熱処理を行って、その後冷却した。両縁部を裁断除去して幅500mmでロール状に巻き取ることによって、厚さ20μmの横一軸延伸フィルムを1100mに亘って連続的に製造した。得られたフィルムは幅方向にのみ熱収縮する熱収縮性ポリスチレン系フィルムであった。90℃で測定した温湯熱収縮率を表6に示した。
前記熱収縮性ポリスチレン系フィルムに、THF/ポリエステルAを90/10(重量比)で混合した溶剤組成物を4mm幅で、250mg/m2となるように塗布し、加工速度400m/分で溶剤接着を行い、チューブ状ラベルロールを得た。また、上記した方法で、溶剤突き抜けの有無、溶剤接着部の剥離強度を測定し、溶剤接着条件および結果を表8に示した。溶剤の突き抜けがなく、溶剤接着部の剥離強度が大きく、良好なラベルであった。
[実施例15]
混合した溶剤組成物をMEK/ポリエステルAを90/10(重量比)で混合した以外は、実施例14と同様にして、チューブ状ラベルロールを得た。溶剤接着条件および結果を表8に示した。溶剤の突き抜けがなく、溶剤接着部の剥離強度が大きく、良好なラベルであった。
混合した溶剤組成物を酢酸エチル/ポリエステルAを90/10(重量比)で混合した以外は、実施例14と同様にして、チューブ状ラベルロールを得た。溶剤接着条件および結果を表8に示した。溶剤の突き抜けがなく、溶剤接着部の剥離強度が大きく、良好なラベルであった。
[実施例17]
前記熱収縮性ポリスチレン系フィルムに、THF/ポリエステルBを80/20(重量比)で混合した溶剤組成物を4mm幅で、250mg/m2となるように塗布し、加工速度400m/分で溶剤接着を行い、チューブ状ラベルロールを得た。また、上記した方法で、溶剤突き抜けの有無、溶剤接着部の剥離強度を測定し、溶剤接着条件および結果を表8に示した。溶剤の突き抜けがなく、溶剤接着部の剥離強度が大きく、良好なラベルであった。
前記熱収縮性ポリスチレン系フィルムに、THF/ポリエステルCを95/5(重量比)で混合した溶剤組成物を4mm幅で、250mg/m2となるように塗布し、加工速度400m/分で溶剤接着を行い、チューブ状ラベルロールを得た。また、上記した方法で、溶剤突き抜けの有無、溶剤接着部の剥離強度を測定し、溶剤接着条件および結果を表8に示した。溶剤の突き抜けがなく、溶剤接着部の剥離強度が大きく、良好なラベルであった。
[実施例19]
前記熱収縮性ポリスチレン系フィルムに、酢酸エチル/ポリエステルAを60/40(重量比)で混合した溶剤組成物を4mm幅で、100mg/m2となるように塗布し、加工速度400m/分で溶剤接着を行い、チューブ状ラベルロールを得た。また、上記した方法で、溶剤突き抜けの有無、溶剤接着部の剥離強度を測定し、溶剤接着条件および結果を表8に示した。溶剤の突き抜けがなく、溶剤接着部の剥離強度が大きく、良好なラベルであった。
[実施例20]
前記熱収縮性ポリスチレン系フィルムに、酢酸エチル/ポリエステルAを80/20(重量比)で混合した溶剤組成物を4mm幅で、400mg/m2となるように塗布し、加工速度400m/分で溶剤接着を行い、チューブ状ラベルロールを得た。また、上記した方法で、溶剤突き抜けの有無、溶剤接着部の剥離強度を測定し、溶剤接着条件および結果を表8に示した。溶剤の突き抜けがなく、溶剤接着部の剥離強度が大きく、良好なラベルであった。
酢酸エチルのみの接着溶剤を用いた以外は実施例19と同様にして、チューブ状ラベルロールを得た。溶剤接着条件および結果を表4に示した。溶剤接着部の剥離強度が低く、ラベルとしては好ましくないものであった。
[比較例6]
前記熱収縮性ポリスチレン系フィルムに、酢酸エチルのみで4mm幅で、450mg/m2となるように塗布し、加工速度400m/分で溶剤接着を行い、チューブ状ラベルロールを得た。また、上記した方法で、溶剤突き抜けの有無、溶剤接着部の剥離強度を測定し、溶剤接着条件および結果を表4に示した。溶剤接着部の剥離強度が大きかったが、溶剤の突き抜け(ブロッキング)があり、ラベルとしては好ましくないものであった。
[比較例7]
THF/ポリエステルCを40/60(重量比)で混合した溶剤組成物を用いた以外は実施例14と同様にして、チューブ状ラベルロールを得ようとした。溶剤接着条件および結果を表4に示した。溶剤組成物の粘度が高すぎるため、フィルムに溶剤組成物を4mm幅で、1g/m2以下となるように塗布できなかった。
前記熱収縮性ポリスチレン系フィルムに、THF/ポリプロピレン(S-901)を90/10(重量比)で混合した溶剤組成物を4mm幅で、250mg/m2となるように塗布し、加工速度400m/分で溶剤接着を行い、チューブ状ラベルロールを得た。また、上記した方法で、溶剤突き抜けの有無、溶剤接着部の剥離強度を測定し、溶剤接着条件および結果を表9に示した。溶剤の突き抜けがなく、溶剤接着部の剥離強度が大きく、良好なラベルであった。
[実施例22]
混合した溶剤組成物をMEK/S-901を90/10(重量比)で混合した以外は、実施例21と同様にして、チューブ状ラベルロールを得た。溶剤接着条件および結果を表9に示した。溶剤の突き抜けがなく、溶剤接着部の剥離強度が大きく、良好なラベルであった。
混合した溶剤組成物を酢酸エチル/S-901を90/10(重量比)で混合した以外は、実施例21と同様にして、チューブ状ラベルロールを得た。溶剤接着条件および結果を表9に示した。溶剤の突き抜けがなく、溶剤接着部の剥離強度が大きく、良好なラベルであった。
[実施例24]
前記熱収縮性ポリスチレン系フィルムに、酢酸エチル/水添石油樹脂(P-140)を95/5(重量比)で混合した溶剤組成物を4mm幅で、250mg/m2となるように塗布し、加工速度400m/分で溶剤接着を行い、チューブ状ラベルロールを得た。また、上記した方法で、溶剤突き抜けの有無、溶剤接着部の剥離強度を測定し、溶剤接着条件および結果を表9に示した。溶剤の突き抜けがなく、溶剤接着部の剥離強度が大きく、良好なラベルであった。
前記熱収縮性ポリスチレン系フィルムに、酢酸エチル/S-901を70/30(重量比)で混合した溶剤組成物を4mm幅で、250mg/m2となるように塗布し、加工速度400m/分で溶剤接着を行い、チューブ状ラベルロールを得た。また、上記した方法で、溶剤突き抜けの有無、溶剤接着部の剥離強度を測定し、溶剤接着条件および結果を表9に示した。溶剤の突き抜けがなく、溶剤接着部の剥離強度が大きく、良好なラベルであった。
[実施例26]
前記熱収縮性ポリスチレン系フィルムに、酢酸エチル/S-901を70/30(重量比)で混合した溶剤組成物を4mm幅で、100mg/m2となるように塗布し、加工速度400m/分で溶剤接着を行い、チューブ状ラベルロールを得た。また、上記した方法で、溶剤突き抜けの有無、溶剤接着部の剥離強度を測定し、溶剤接着条件および結果を表9に示した。溶剤の突き抜けがなく、溶剤接着部の剥離強度が大きく、良好なラベルであった。
THF/P-140を40/60(重量比)で混合した接着溶剤組成物を用いた以外は実施例1と同様にして、チューブ状ラベルロールを得ようとした。溶剤接着条件および結果を表9に示した。接着溶剤組成物の粘度が高すぎるため、フィルムに接着溶剤組成物を4mm幅で、1g/m2以下となるように塗布できなかった。
Claims (7)
- 熱収縮性ポリ塩化ビニル系フィルム又は熱収縮性ポリスチレン系フィルムの両端部同士が溶剤組成物で接着されたチューブ状の熱収縮性ラベルであって、前記溶剤組成物がテトラヒドロフラン(THF)、メチルエチルケトン(MEK)、及び酢酸エチルからなる群より選択される少なくとも1種以上の有機溶剤と、ポリエステル、ポリプロピレン、及び水添石油樹脂からなる群より選択される少なくとも1種以上の樹脂を含む溶剤組成物であり、前記接着部の剥離強度が2N/15mm以上であることを特徴とする熱収縮性ラベル。
- 前記溶剤組成物に含まれる樹脂がポリエステルであり、該樹脂の含有量が5重量%以上40重量%以下である請求項1に記載の熱収縮性ラベル。
- 前記溶剤組成物に含まれる樹脂がポリプロピレン又は水添石油樹脂であり、該樹脂の含有量が5重量%以上40重量%以下である請求項1に記載の熱収縮性ラベル。
- 前記熱収縮性ポリ塩化ビニル系フィルム又は熱収縮性ポリスチレン系フィルムの厚みが5μm以上50μm以下である請求項1~3のいずれかに記載の熱収縮性ラベル。
- 請求項1~4のいずれかに記載の熱収縮性ラベルを包装対象物の外周の少なくとも一部に有することを特徴とする包装体。
- テトラヒドロフラン(THF)、メチルエチルケトン(MEK)、及び酢酸エチルからなる群より選択される少なくとも1種以上の有機溶剤と、ポリエステル、ポリプロピレン、及び水添石油樹脂からなる群より選択される少なくとも1種以上の樹脂を含む溶剤組成物によって、熱収縮性ポリ塩化ビニル系フィルム又は熱収縮性ポリスチレン系フィルムの両端部同士を重ねて接着することを特徴とする熱収縮性ラベルの製造方法。
- テトラヒドロフラン(THF)、メチルエチルケトン(MEK)、及び酢酸エチルからなる群より選択される少なくとも1種以上の有機溶剤と、ポリエステル、ポリプロピレン、及び水添石油樹脂からなる群より選択される少なくとも1種以上の樹脂を含む溶剤組成物で、該溶剤組成物によって熱収縮性ポリ塩化ビニル系フィルム又は熱収縮性ポリスチレン系フィルムを接着して熱収縮性ラベルを作成するために用いられることを特徴とする、熱収縮性ラベル用溶剤組成物。
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3075019B2 (ja) | 1993-06-10 | 2000-08-07 | 東洋紡績株式会社 | 熱収縮性ポリエステル系チューブの製造方法 |
| JP2003094521A (ja) * | 2001-09-26 | 2003-04-03 | Toyobo Co Ltd | 熱収縮性ポリスチレン系樹脂フィルム、これを用いたラベル、及び容器 |
| JP3452021B2 (ja) | 1993-06-10 | 2003-09-29 | 東洋紡績株式会社 | 熱収縮性ポリエステル系チューブ、及び熱収縮ポリエステル系チューブ |
| JP2013134446A (ja) * | 2011-12-27 | 2013-07-08 | Gunze Ltd | 熱収縮性ラベル、その製造方法及び該ラベルが装着された容器 |
| JP2014043520A (ja) | 2012-08-28 | 2014-03-13 | Henkel Japan Ltd | ホットメルト接着剤 |
| US8778077B2 (en) * | 2012-02-29 | 2014-07-15 | Skc Inc. | Solvent for heat-shrinkable polyester-based labels |
| WO2016039133A1 (ja) * | 2014-09-09 | 2016-03-17 | 東洋紡株式会社 | 熱収縮性ポリエステル系ラベル、包装体、および熱収縮性ポリエステル系ラベルの製造方法 |
Family Cites Families (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USH870H (en) * | 1984-12-07 | 1991-01-01 | Shell Oil Company | Solvent welding polybutene-1 |
| JPH08507171A (ja) * | 1993-02-19 | 1996-07-30 | デュラセル インコーポレイテッド | 電池の被覆体 |
| US6465558B2 (en) * | 2000-02-03 | 2002-10-15 | Ferro Corporation | Solvent based adhesive composition |
| US6649259B1 (en) * | 2000-02-29 | 2003-11-18 | National Starch And Chemical Investment Holding Corporation | Adhesives for thermally shrinkable films or labels |
| JPWO2005048218A1 (ja) | 2003-11-12 | 2007-05-31 | 株式会社フジシールインターナショナル | Petボトル用シュリンクラベル及びそれを装着してなるpetボトル |
| JP4580687B2 (ja) * | 2004-05-25 | 2010-11-17 | 東洋紡績株式会社 | 熱収縮性ラベル |
| US20060121219A1 (en) * | 2004-12-07 | 2006-06-08 | Eastman Chemical Co. | Void-containing polyester shrink film with improved density retention |
| US7592385B2 (en) * | 2005-05-06 | 2009-09-22 | Oatey Company | Universal solvent cement |
| JP2009092777A (ja) * | 2007-10-04 | 2009-04-30 | Dainippon Printing Co Ltd | 胴巻きラベル |
| JP4905313B2 (ja) * | 2007-10-04 | 2012-03-28 | 大日本印刷株式会社 | 胴巻きラベル |
| JP5202199B2 (ja) * | 2008-09-10 | 2013-06-05 | グンゼ株式会社 | 熱収縮性ラベル及び容器 |
| US8431232B2 (en) * | 2008-10-30 | 2013-04-30 | Eastman Chemical Company | Aromatic-aliphatic polyester hot melt adhesives for roll-applied labels |
| CN102971144B (zh) * | 2010-06-30 | 2015-04-08 | 优泊公司 | 易剥离性薄膜、模内成型用标签、带标签的树脂成型品、壁纸、不干胶标签以及带标签的容器 |
| JP2012032657A (ja) * | 2010-07-30 | 2012-02-16 | Dainippon Printing Co Ltd | ロールシュリンクラベル、ロールシュリンクラベル付き容器およびこれらの製造方法 |
| EP2892044B1 (en) * | 2012-08-31 | 2019-11-20 | Fuji Seal International, Inc. | Cylindrical shrink label and method for producing same |
| US20140099462A1 (en) * | 2012-10-05 | 2014-04-10 | Fort Dearborn Company, Llc | Seaming process for reducing weak or open seams and beads in a tdo shrink film tube |
| ITVR20130042A1 (it) * | 2013-02-15 | 2014-08-16 | Sacmi Verona Spa | Procedimento di produzione di etichette a manicotto e dispositivo per la loro produzione |
| JP6177031B2 (ja) * | 2013-07-05 | 2017-08-09 | 株式会社フジシールインターナショナル | 筒状シュリンクラベルの製造方法 |
| CN105492329B (zh) * | 2013-08-21 | 2020-04-17 | 太阳化学公司 | 促进再循环的收缩缠绕的标签涂料 |
| US9624400B2 (en) * | 2014-03-26 | 2017-04-18 | Bostik, Inc. | Solvent-based low temperature heat seal coating |
| JP6430309B2 (ja) | 2015-03-20 | 2018-11-28 | レンゴー株式会社 | 熱収縮性ラベル |
| CN106280698B (zh) * | 2015-05-27 | 2020-04-21 | 苏州市贝特利高分子材料股份有限公司 | 耐高温pi白色标签油墨及其制备方法 |
-
2018
- 2018-03-23 WO PCT/JP2018/011748 patent/WO2018174254A1/ja not_active Ceased
- 2018-03-23 CN CN201880020076.7A patent/CN110462715B/zh active Active
- 2018-03-23 JP JP2018530908A patent/JP7512014B2/ja active Active
- 2018-03-23 US US16/494,619 patent/US20200087500A1/en not_active Abandoned
- 2018-03-23 TW TW107110050A patent/TWI775826B/zh active
- 2018-03-23 EP EP18772003.2A patent/EP3605506B1/en active Active
-
2022
- 2022-01-13 JP JP2022003799A patent/JP7380721B2/ja active Active
-
2023
- 2023-07-24 US US18/357,414 patent/US20230365796A1/en active Pending
- 2023-11-01 JP JP2023187628A patent/JP7662011B2/ja active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3075019B2 (ja) | 1993-06-10 | 2000-08-07 | 東洋紡績株式会社 | 熱収縮性ポリエステル系チューブの製造方法 |
| JP3452021B2 (ja) | 1993-06-10 | 2003-09-29 | 東洋紡績株式会社 | 熱収縮性ポリエステル系チューブ、及び熱収縮ポリエステル系チューブ |
| JP2003094521A (ja) * | 2001-09-26 | 2003-04-03 | Toyobo Co Ltd | 熱収縮性ポリスチレン系樹脂フィルム、これを用いたラベル、及び容器 |
| JP2013134446A (ja) * | 2011-12-27 | 2013-07-08 | Gunze Ltd | 熱収縮性ラベル、その製造方法及び該ラベルが装着された容器 |
| US8778077B2 (en) * | 2012-02-29 | 2014-07-15 | Skc Inc. | Solvent for heat-shrinkable polyester-based labels |
| JP2014043520A (ja) | 2012-08-28 | 2014-03-13 | Henkel Japan Ltd | ホットメルト接着剤 |
| WO2016039133A1 (ja) * | 2014-09-09 | 2016-03-17 | 東洋紡株式会社 | 熱収縮性ポリエステル系ラベル、包装体、および熱収縮性ポリエステル系ラベルの製造方法 |
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| TW201842134A (zh) | 2018-12-01 |
| CN110462715B (zh) | 2024-05-28 |
| CN110462715A (zh) | 2019-11-15 |
| EP3605506A1 (en) | 2020-02-05 |
| JP2022062054A (ja) | 2022-04-19 |
| TWI775826B (zh) | 2022-09-01 |
| JP7512014B2 (ja) | 2024-07-08 |
| EP3605506B1 (en) | 2023-08-16 |
| JPWO2018174254A1 (ja) | 2020-01-23 |
| JP2024014884A (ja) | 2024-02-01 |
| US20200087500A1 (en) | 2020-03-19 |
| JP7662011B2 (ja) | 2025-04-15 |
| US20230365796A1 (en) | 2023-11-16 |
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| EP3605506A4 (en) | 2020-12-16 |
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