JP6994640B2 - Adhesive resin composition, sheet, lid material, member set and container using the composition - Google Patents
Adhesive resin composition, sheet, lid material, member set and container using the composition Download PDFInfo
- Publication number
- JP6994640B2 JP6994640B2 JP2020106703A JP2020106703A JP6994640B2 JP 6994640 B2 JP6994640 B2 JP 6994640B2 JP 2020106703 A JP2020106703 A JP 2020106703A JP 2020106703 A JP2020106703 A JP 2020106703A JP 6994640 B2 JP6994640 B2 JP 6994640B2
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- JP
- Japan
- Prior art keywords
- resin composition
- adhesive resin
- mass
- vinyl acetate
- container
- Prior art date
- Legal status (The legal status 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 status listed.)
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- 239000000203 mixture Substances 0.000 title claims description 60
- 239000004840 adhesive resin Substances 0.000 title claims description 59
- 229920006223 adhesive resin Polymers 0.000 title claims description 59
- 239000000463 material Substances 0.000 title claims description 41
- 229920005989 resin Polymers 0.000 claims description 51
- 239000011347 resin Substances 0.000 claims description 51
- 229920000092 linear low density polyethylene Polymers 0.000 claims description 31
- 239000004707 linear low-density polyethylene Substances 0.000 claims description 31
- 239000005038 ethylene vinyl acetate Substances 0.000 claims description 29
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims description 29
- 238000002844 melting Methods 0.000 claims description 20
- 230000008018 melting Effects 0.000 claims description 20
- 239000011248 coating agent Substances 0.000 claims description 13
- 238000000576 coating method Methods 0.000 claims description 13
- 239000013032 Hydrocarbon resin Substances 0.000 claims description 10
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims description 10
- 125000002723 alicyclic group Chemical group 0.000 claims description 10
- 229920006270 hydrocarbon resin Polymers 0.000 claims description 10
- 239000000155 melt Substances 0.000 claims description 10
- 235000007586 terpenes Nutrition 0.000 claims description 6
- 150000003505 terpenes Chemical class 0.000 claims description 5
- 239000000758 substrate Substances 0.000 claims description 4
- -1 polypropylene Polymers 0.000 description 32
- 239000004743 Polypropylene Substances 0.000 description 23
- 229920001155 polypropylene Polymers 0.000 description 23
- 239000004793 Polystyrene Substances 0.000 description 14
- 229920002223 polystyrene Polymers 0.000 description 14
- 238000000034 method Methods 0.000 description 10
- 238000012545 processing Methods 0.000 description 10
- 239000004698 Polyethylene Substances 0.000 description 8
- 229920000573 polyethylene Polymers 0.000 description 8
- 239000012790 adhesive layer Substances 0.000 description 6
- 238000010030 laminating Methods 0.000 description 6
- 239000001993 wax Substances 0.000 description 6
- 239000000654 additive Substances 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 229920001684 low density polyethylene Polymers 0.000 description 4
- 239000004702 low-density polyethylene Substances 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 229920000139 polyethylene terephthalate Polymers 0.000 description 4
- 239000005020 polyethylene terephthalate Substances 0.000 description 4
- 229920005990 polystyrene resin Polymers 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 229920001577 copolymer Polymers 0.000 description 3
- 238000005336 cracking Methods 0.000 description 3
- 230000002950 deficient Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229920000728 polyester Polymers 0.000 description 3
- GRWFGVWFFZKLTI-IUCAKERBSA-N (-)-α-pinene Chemical compound CC1=CC[C@@H]2C(C)(C)[C@H]1C2 GRWFGVWFFZKLTI-IUCAKERBSA-N 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 2
- 239000005977 Ethylene Substances 0.000 description 2
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 2
- 229910000323 aluminium silicate Inorganic materials 0.000 description 2
- 239000003963 antioxidant agent Substances 0.000 description 2
- 229920006272 aromatic hydrocarbon resin Polymers 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- UAUDZVJPLUQNMU-KTKRTIGZSA-N erucamide Chemical compound CCCCCCCC\C=C/CCCCCCCCCCCC(N)=O UAUDZVJPLUQNMU-KTKRTIGZSA-N 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 229920001903 high density polyethylene Polymers 0.000 description 2
- 239000004700 high-density polyethylene Substances 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 2
- 239000011976 maleic acid Substances 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 239000000088 plastic resin Substances 0.000 description 2
- 150000003097 polyterpenes Chemical class 0.000 description 2
- 239000000565 sealant Substances 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229920005992 thermoplastic resin Polymers 0.000 description 2
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- WTARULDDTDQWMU-RKDXNWHRSA-N (+)-β-pinene Chemical compound C1[C@H]2C(C)(C)[C@@H]1CCC2=C WTARULDDTDQWMU-RKDXNWHRSA-N 0.000 description 1
- WTARULDDTDQWMU-IUCAKERBSA-N (-)-Nopinene Natural products C1[C@@H]2C(C)(C)[C@H]1CCC2=C WTARULDDTDQWMU-IUCAKERBSA-N 0.000 description 1
- UPZFLZYXYGBAPL-UHFFFAOYSA-N 2-ethyl-2-methyl-1,3-dioxolane Chemical compound CCC1(C)OCCO1 UPZFLZYXYGBAPL-UHFFFAOYSA-N 0.000 description 1
- 229920002126 Acrylic acid copolymer Polymers 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- WTARULDDTDQWMU-UHFFFAOYSA-N Pseudopinene Natural products C1C2C(C)(C)C1CCC2=C WTARULDDTDQWMU-UHFFFAOYSA-N 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 229920006271 aliphatic hydrocarbon resin Polymers 0.000 description 1
- XCPQUQHBVVXMRQ-UHFFFAOYSA-N alpha-Fenchene Natural products C1CC2C(=C)CC1C2(C)C XCPQUQHBVVXMRQ-UHFFFAOYSA-N 0.000 description 1
- MVNCAPSFBDBCGF-UHFFFAOYSA-N alpha-pinene Natural products CC1=CCC23C1CC2C3(C)C MVNCAPSFBDBCGF-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 229930006722 beta-pinene Natural products 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000003851 corona treatment Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 238000009820 dry lamination Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920006242 ethylene acrylic acid copolymer Polymers 0.000 description 1
- 235000012438 extruded product Nutrition 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- LCWMKIHBLJLORW-UHFFFAOYSA-N gamma-carene Natural products C1CC(=C)CC2C(C)(C)C21 LCWMKIHBLJLORW-UHFFFAOYSA-N 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 239000002530 phenolic antioxidant Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
- 229920013716 polyethylene resin Polymers 0.000 description 1
- 229920005672 polyolefin resin Polymers 0.000 description 1
- GRWFGVWFFZKLTI-UHFFFAOYSA-N rac-alpha-Pinene Natural products CC1=CCC2C(C)(C)C1C2 GRWFGVWFFZKLTI-UHFFFAOYSA-N 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011342 resin composition Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000012748 slip agent Substances 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 229920006163 vinyl copolymer Polymers 0.000 description 1
- 239000004711 α-olefin Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J131/00—Adhesives based on 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 acyloxy radical of a saturated carboxylic acid, of carbonic acid, or of a haloformic acid; Adhesives based on derivatives of such polymers
- C09J131/02—Homopolymers or copolymers of esters of monocarboxylic acids
- C09J131/04—Homopolymers or copolymers of vinyl acetate
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J123/00—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers
- C09J123/02—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers not modified by chemical after-treatment
- C09J123/04—Homopolymers or copolymers of ethene
- C09J123/08—Copolymers of ethene
- C09J123/0846—Copolymers of ethene with unsaturated hydrocarbons containing other atoms than carbon or hydrogen atoms
- C09J123/0853—Vinylacetate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/06—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/06—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation
- B05D3/061—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation using U.V.
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/06—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation
- B05D3/061—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation using U.V.
- B05D3/062—Pretreatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/06—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation
- B05D3/061—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation using U.V.
- B05D3/065—After-treatment
- B05D3/067—Curing or cross-linking the coating
-
- 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
-
- 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
- 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
-
- 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
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
-
- 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
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
-
- 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
- B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
- B65D65/38—Packaging materials of special type or form
- B65D65/40—Applications of laminates for particular packaging purposes
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/08—Macromolecular additives
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J123/00—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers
- C09J123/02—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers not modified by chemical after-treatment
- C09J123/04—Homopolymers or copolymers of ethene
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
-
- 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
- B32B2250/00—Layers arrangement
- B32B2250/24—All layers being polymeric
-
- 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
- B32B2439/00—Containers; Receptacles
- B32B2439/40—Closed containers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/066—LDPE (radical process)
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
- C09J2301/312—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier parameters being the characterizing feature
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Packages (AREA)
- Adhesive Tapes (AREA)
- Laminated Bodies (AREA)
- Wrappers (AREA)
Description
本発明は、成膜性、易開封性、耐ボイル性に優れる接着性樹脂組成物、該接着性樹脂組成物を用いたシート、蓋材、密封容器用部材セット及び容器に関するものである。 The present invention relates to an adhesive resin composition having excellent film-forming property, easy-opening property, and boil resistance, a sheet, a lid material, a member set for a sealed container, and a container using the adhesive resin composition.
近年、食品包装や工業用包装として、耐熱性や断熱保温性に優れる観点から、ポリプロピレン容器やポリスチレン容器が使用されている。そして、これらの容器に用いられる蓋材としては、適度なヒートシール強度を持ち、且つ易剥離性を有するフィルムが使用されている。 In recent years, polypropylene containers and polystyrene containers have been used as food packaging and industrial packaging from the viewpoint of excellent heat resistance and heat insulation and heat retention. As the lid material used for these containers, a film having an appropriate heat-sealing strength and easy peeling property is used.
このようなポリプロピレン容器やポリスチレン容器の蓋材に用いられるフィルムとして、例えば特許文献１には、酢酸ビニル含有率が３～１５重量％でありメルトマスフローレイトが１０～４０ｇ／１０分であるエチレン－酢酸ビニル共重合体、粘着付与剤、及び低密度ポリエチレンを含む樹脂組成物からなる接着剤層を備える易剥離性フィルムが開示されている。 As a film used for the lid material of such a polypropylene container or a polystyrene container, for example, in Patent Document 1, ethylene-ethylene having a vinyl acetate content of 3 to 15% by weight and a melt mass flow rate of 10 to 40 g / 10 minutes. An easily peelable film comprising an adhesive layer composed of a resin composition containing a vinyl acetate copolymer, a tackifier, and low density polyethylene is disclosed.
しかしながら、特許文献１に記載の易剥離性フィルムは、接着剤層が低密度ポリエチレンを含むために、耐熱性に劣り、ボイル・レトルト処理ができないという課題がある。 However, the easily peelable film described in Patent Document 1 has a problem that it is inferior in heat resistance and cannot be boiled and retorted because the adhesive layer contains low-density polyethylene.
よって本発明の課題は、成膜性に優れるだけでなく、ポリプロピレン容器やポリスチレン容器に対して易開封性に優れ、且つ耐ボイル性に優れる接着性樹脂組成物、並びにそれを用いたシート、蓋材、部材セット及び容器を提供することにある。 Therefore, the subject of the present invention is an adhesive resin composition which is not only excellent in film forming property but also excellent in easy-opening property and boil resistance for polypropylene containers and polystyrene containers, and sheets and lids using the same. The purpose is to provide materials, member sets and containers.
本発明者は鋭意研究を重ねた結果、特定の酢酸ビニル含有率を有するエチレン－酢酸ビニル共重合体（Ａ）、特定のメルトマスフローレイトを有する直鎖状低密度ポリエチレン（Ｂ）、及び粘着付与樹脂（Ｃ）を所定の配合比で組み合わせることで、前記課題を解決することを見出し、本発明に至った。 As a result of diligent research, the present inventor has obtained an ethylene-vinyl acetate copolymer (A) having a specific vinyl acetate content, a linear low-density polyethylene (B) having a specific melt mass flow rate, and adhesive application. We have found that the above problems can be solved by combining the resin (C) in a predetermined compounding ratio, and have reached the present invention.
本発明は、酢酸ビニル含有率が５～１５質量％のエチレン－酢酸ビニル共重合体（Ａ）４０～７５質量％、メルトマスフローレイトが１～２０ｇ／１０分の直鎖状低密度ポリエチレン（Ｂ）１０～４５質量％、及び粘着付与樹脂（Ｃ）１５～３０質量％を含有する、接着性樹脂組成物に関する。 The present invention is a linear low density polyethylene (B) having an ethylene-vinyl acetate copolymer (A) having a vinyl acetate content of 5 to 15% by mass and an amount of 40 to 75% by mass and a melt mass flow rate of 1 to 20 g / 10 minutes. ) 10 to 45% by mass, and 15 to 30% by mass of the tackifier resin (C).
本発明は、メルトマスフローレイトが１～２０ｇ／１０分である、上記接着性樹脂組成物に関する。 The present invention relates to the above adhesive resin composition having a melt mass flow rate of 1 to 20 g / 10 minutes.
本発明は、前記エチレン－酢酸ビニル共重合体（Ａ）の示差走査型熱量計により測定した融点が８０～１２０℃である、上記接着性樹脂組成物に関する。 The present invention relates to the adhesive resin composition having a melting point of 80 to 120 ° C. as measured by a differential scanning calorimeter of the ethylene-vinyl acetate copolymer (A).
本発明は、前記直鎖状低密度ポリエチレン（Ｂ）の示差走査型熱量計により測定した融点が９０～１５０℃である、上記接着性樹脂組成物に関する。 The present invention relates to the adhesive resin composition having a melting point of 90 to 150 ° C. as measured by a differential scanning calorimeter of the linear low density polyethylene (B).
本発明は、前記粘着付与樹脂（Ｃ）の示差走査型熱量計により測定した融点が５５～１００℃である、上記接着性樹脂組成物に関する。 The present invention relates to the adhesive resin composition having a melting point of 55 to 100 ° C. as measured by a differential scanning calorimeter of the tackifier resin (C).
本発明は、前記粘着付与樹脂（Ｃ）が、脂環族炭化水素樹脂及びテルペン樹脂からなる群から選ばれる少なくとも１種を含む、上記接着性樹脂組成物に関する。 The present invention relates to the adhesive resin composition, wherein the tackifier resin (C) contains at least one selected from the group consisting of an alicyclic hydrocarbon resin and a terpene resin.
本発明は、前記直鎖状低密度ポリエチレン（Ｂ）の含有率が、２０～３０質量％である、上記接着性樹脂組成物に関する。 The present invention relates to the adhesive resin composition having a content of the linear low density polyethylene (B) of 20 to 30% by mass.
本発明は、基材上に、上記接着性樹脂組成物の塗膜を備えるシートに関する。 The present invention relates to a sheet provided with a coating film of the adhesive resin composition on a substrate.
本発明は、上記シートにより形成された蓋材に関する。 The present invention relates to a lid material formed of the above sheet.
本発明は、容器本体と、上記蓋材とからなる、開封可能な容器用部材セットに関する。 The present invention relates to an openable container member set including a container body and the lid material.
本発明は、容器本体の開口部が、上記蓋材により密封された、開封可能な容器に関する。 The present invention relates to an openable container in which the opening of the container body is sealed by the above-mentioned lid material.
本発明により、成膜性に優れるだけでなく、ポリプロピレン容器やポリスチレン容器に対して易開封性に優れ、且つ耐ボイル性に優れる接着性樹脂組成物、並びにそれを用いたシート、蓋材、部材セット及び容器を提供することができる。 INDUSTRIAL APPLICABILITY According to the present invention, an adhesive resin composition which is not only excellent in film forming property but also excellent in easy-opening property and boil resistance for polypropylene containers and polystyrene containers, and sheets, lid materials and members using the same. Sets and containers can be provided.
本発明の接着性樹脂組成物は、酢酸ビニル含有率が５～１５質量％のエチレン－酢酸ビニル共重合体（Ａ）４０～７５質量％、メルトマスフローレイトが１～２０ｇ／１０分の直鎖状低密度ポリエチレン（Ｂ）１０～４５質量％、及び粘着付与樹脂（Ｃ）１５～３０質量％を含有することを特徴とする。
特定の酢酸ビニル含有率を有するエチレン－酢酸ビニル共重合体（Ａ）、特定のメルトマスフローレイトを有する直鎖状低密度ポリエチレン（Ｂ）、及び粘着付与樹脂（Ｃ）を所定の配合比で組み合わせることで、易開封性と耐熱性に優れボイル処理が可能な接着性樹脂組成物を提供することが可能となる。
以下に、本発明について、詳細に説明する。
The adhesive resin composition of the present invention is a straight chain having an ethylene-vinyl acetate copolymer (A) having a vinyl acetate content of 5 to 15% by mass of 40 to 75% by mass and a melt mass flow rate of 1 to 20 g / 10 minutes. It is characterized by containing 10 to 45% by mass of low-density polyethylene (B) and 15 to 30% by mass of a tackifier resin (C).
A combination of an ethylene-vinyl acetate copolymer (A) having a specific vinyl acetate content, a linear low-density polyethylene (B) having a specific melt mass flow rate, and a tackifier resin (C) in a predetermined compounding ratio. This makes it possible to provide an adhesive resin composition that is easy to open and has excellent heat resistance and can be boiled.
Hereinafter, the present invention will be described in detail.
＜エチレン－酢酸ビニル共重合体（ＥＶＡ）（Ａ）＞
エチレン－酢酸ビニル共重合体（Ａ）は、エチレンと酢酸ビニルとを共重合した熱可塑性樹脂であり、本発明で用いられるエチレン－酢酸ビニル共重合体（Ａ）は、酢酸ビニル含有率が５～１５質量％であり、上記を満たすものであれば特に制限なく用いることができる。このようなエチレン－酢酸ビニル共重合体を用いることで、押出しラミネート加工性、低温シール性、インフレーション加工適性に優れた接着性樹脂組成物となる。エチレン－酢酸ビニル共重合体は、１種を単独で用いてもよいし、２種以上を併用してもよい。
<Ethylene-vinyl acetate copolymer (EVA) (A)>
The ethylene-vinyl acetate copolymer (A) is a thermoplastic resin obtained by copolymerizing ethylene and vinyl acetate, and the ethylene-vinyl acetate copolymer (A) used in the present invention has a vinyl acetate content of 5. It can be used without particular limitation as long as it is up to 15% by mass and satisfies the above. By using such an ethylene-vinyl acetate copolymer, an adhesive resin composition having excellent extruded laminating property, low temperature sealing property, and inflation processing suitability can be obtained. One type of ethylene-vinyl acetate copolymer may be used alone, or two or more types may be used in combination.
エチレン－酢酸ビニル共重合体（Ａ）の含有量は、接着性樹脂組成物の全量を基準として、４０～７５質量％であることが重要であり、エチレン－酢酸ビニル共重合体（Ａ）の含有量が４０質量％以上であると、開封強度を損なうことなく、ポリプロピレン容器やポリスチレン容器に十分に接着する。エチレン－酢酸ビニル共重合体（Ａ）の含有量が７５質量％以下であると、塗加工適性と接着性とのバランスに優れるだけでなく、容器のフランジにおける樹脂残りや糸曳きが発生しない。
エチレン－酢酸ビニル共重合体（Ａ）の含有量は、易開封性、剥離感の観点から好ましくは４５～５５質量％である。
It is important that the content of the ethylene-vinyl acetate copolymer (A) is 40 to 75% by mass based on the total amount of the adhesive resin composition, and the content of the ethylene-vinyl acetate copolymer (A) is important. When the content is 40% by mass or more, it sufficiently adheres to a polypropylene container or a polystyrene container without impairing the opening strength. When the content of the ethylene-vinyl acetate copolymer (A) is 75% by mass or less, not only the balance between coating processability and adhesiveness is excellent, but also resin residue and stringing on the flange of the container do not occur.
The content of the ethylene-vinyl acetate copolymer (A) is preferably 45 to 55% by mass from the viewpoint of easy opening and peeling feeling.
エチレン－酢酸ビニル共重合体（Ａ）の示差走査型熱量計により測定した融点は、好ましくは８０～１２０℃であり、より好ましくは９０～１１０℃である。上記の範囲内であると、直鎖状低密度ポリエチレン（Ｂ）との相溶性が向上し、塗加工適性が向上するだけでなく、開封強度を損なうことなく十分に接着できる点で好ましい。 The melting point of the ethylene-vinyl acetate copolymer (A) measured by a differential scanning calorimeter is preferably 80 to 120 ° C, more preferably 90 to 110 ° C. Within the above range, compatibility with the linear low-density polyethylene (B) is improved, not only the coating process suitability is improved, but also sufficient adhesion is possible without impairing the opening strength, which is preferable.
エチレン－酢酸ビニル共重合体（Ａ）のメルトマスフローレイト（以下、ＭＦＲ）は、好ましくは０．５～５０ｇ／１０分であり、より好ましくは０．５～２０ｇ／１０分であり、特に好ましくは０．５～１０ｇ／１０分である。なお、本明細書におけるメルトマスフローレイトとは、ＪＩＳ．Ｋ７２１０に準拠して測定した１９０℃、２１．１６８Ｎにおける値である。 The melt mass flow rate (hereinafter, MFR) of the ethylene-vinyl acetate copolymer (A) is preferably 0.5 to 50 g / 10 minutes, more preferably 0.5 to 20 g / 10 minutes, and particularly preferably. Is 0.5 to 10 g / 10 minutes. The term "melt mass flow rate" as used herein refers to JIS. It is a value at 190 ° C. and 21.168N measured according to K7210.
エチレン－酢酸ビニル共重合体（Ａ）の密度は、好ましくは０．９０～０．９５であり、より好ましくは０．９２～０．９４である。なお、本明細書における密度とは、ＪＩＳ．Ｋ７１１２にピクノメーター法に準拠して測定した値である。 The density of the ethylene-vinyl acetate copolymer (A) is preferably 0.90 to 0.95, more preferably 0.92 to 0.94. The density in the present specification is defined as JIS. It is a value measured according to the pycnometer method for K7112.
＜直鎖状低密度ポリエチレン（Ｂ）＞
直鎖状低密度ポリエチレン（Ｂ）は、繰り返し単位のエチレンと若干量のα‐オレフィンを共重合させた、熱可塑性樹脂であり、本発明で用いられる直鎖状低密度ポリエチレン（Ｂ）は、メルトマスフローレイトが１～２０ｇ／１０分であり、上記を満たすものであれば特に制限なく用いることができる。このような直鎖状低密度ポリエチレン（Ｂ）を用いることで、ポリプロピレン容器やポリスチレン容器に対する接着性が高まり、耐ボイル性に優れた接着性樹脂組成物となる。直鎖状低密度ポリエチレンは、１種を単独で用いてもよいし、２種以上を併用してもよい。
<Linear low density polyethylene (B)>
The linear low-density polyethylene (B) is a thermoplastic resin obtained by copolymerizing a repeating unit of ethylene with a small amount of α-olefin, and the linear low-density polyethylene (B) used in the present invention is a linear low-density polyethylene (B). As long as the melt mass flow rate is 1 to 20 g / 10 minutes and the above conditions are satisfied, it can be used without particular limitation. By using such a linear low-density polyethylene (B), the adhesiveness to a polypropylene container or a polystyrene container is enhanced, and an adhesive resin composition having excellent boil resistance can be obtained. As the linear low-density polyethylene, one type may be used alone, or two or more types may be used in combination.
直鎖状低密度ポリエチレン（Ｂ）の含有率は、接着性樹脂組成物の全量を基準として、１０～４５質量％であることが重要であり、直鎖状低密度ポリエチレン（Ｂ）の含有量が１０質量％以上であると、接着強度の維持性に優れたものとなる。直鎖状低密度ポリエチレン（Ｂ）の含有量が４５質量％以下であると、溶融膜割れが発生しにくく、押出しラミネート加工性に優れる。
直鎖状低密度ポリエチレン（Ｂ）の含有量は、接着性や高温環境下での接着強度維持性、耐ボイル性の観点から、好ましくは１５～４０質量％であり、より好ましくは２０～３０質量％である。
It is important that the content of the linear low-density polyethylene (B) is 10 to 45% by mass based on the total amount of the adhesive resin composition, and the content of the linear low-density polyethylene (B) is When it is 10% by mass or more, the maintainability of the adhesive strength is excellent. When the content of the linear low-density polyethylene (B) is 45% by mass or less, cracking of the molten film is unlikely to occur, and the extruded laminating workability is excellent.
The content of the linear low-density polyethylene (B) is preferably 15 to 40% by mass, more preferably 20 to 30 from the viewpoint of adhesiveness, adhesive strength maintenance in a high temperature environment, and boil resistance. It is mass%.
直鎖状低密度ポリエチレン（Ｂ）の示差走査型熱量計により測定した融点は、好ましくは９０～１５０℃であり、より好ましくは１００～１３０℃である。上記の範囲内であると、適度な接着強度を発現し、低温シール性がより優れたものとなるため好ましい。 The melting point of the linear low-density polyethylene (B) measured by a differential scanning calorimeter is preferably 90 to 150 ° C, more preferably 100 to 130 ° C. Within the above range, an appropriate adhesive strength is exhibited and the low temperature sealing property becomes more excellent, which is preferable.
直鎖状低密度ポリエチレン（Ｂ）の密度は、好ましくは０．８５～０．９５であり、より好ましくは０．９０～０．９５である。 The density of the linear low-density polyethylene (B) is preferably 0.85 to 0.95, more preferably 0.90 to 0.95.
＜粘着付与樹脂（Ｃ）＞
本発明における粘着付与樹脂（Ｃ）は特に制限されず、シーラント樹脂分野において公知の粘着付与樹脂から適宜選択することができる。
このような粘着付与樹脂としては、例えば、脂肪族炭化水素樹脂、脂環族炭化水素樹脂、芳香族系炭化水素樹脂、ポリテルペン系樹脂、ロジン類が挙げられ、ポリテルペン樹脂としては、α－ピネン、β－ピネンなどの単独重合又は共重合体、及びそれらを水添した水添テルペン樹脂を使用することができる。
中でも、粘着付与樹脂（Ｃ）は、脂環族炭化水素樹脂、芳香族炭化水素樹脂及びテルペン樹脂からなる群から選ばれる少なくとも１種を含むことが好ましく、より好ましくは脂環族炭化水素樹脂及びテルペン樹脂からなる群から選ばれる少なくとも１種を含むものである。
これらの粘着付与樹脂は、１種を単独で用いてもよく、２種以上を併用してもよい。
<Adhesive-imparting resin (C)>
The tackifier resin (C) in the present invention is not particularly limited, and can be appropriately selected from the tackifier resins known in the sealant resin field.
Examples of such tackifier resins include aliphatic hydrocarbon resins, alicyclic hydrocarbon resins, aromatic hydrocarbon resins, polyterpene resins, and rosins, and polyterpene resins include α-pinene. A homopolymer or copolymer such as β-pinene and a hydrocarbon terpene resin hydrogenated with them can be used.
Among them, the tackifier resin (C) preferably contains at least one selected from the group consisting of an alicyclic hydrocarbon resin, an aromatic hydrocarbon resin and a terpene resin, and more preferably an alicyclic hydrocarbon resin and a terpene resin. It contains at least one selected from the group consisting of terpene resins.
These tackifier resins may be used alone or in combination of two or more.
粘着付与樹脂（Ｃ）の含有量は、接着性樹脂組成物の全量を基準として、１５～３０質量％であることが重要である。粘着付与樹脂（Ｃ）の含有量が１０質量％以上であると、開封強度を損なうことなく、ポリプロピレン容器やポリスチレン容器に十分に接着することができる。粘着付与樹脂（Ｃ）の含有量が３０質量％以下であると、溶融膜割れが発生しにくく、押出しラミネート加工性に優れる。
粘着付与樹脂（Ｃ）の含有量は、成膜性、易開封性、剥離感の観点から、好ましくは２０～３０質量％である。
It is important that the content of the tackifier resin (C) is 15 to 30% by mass based on the total amount of the adhesive resin composition. When the content of the tackifier resin (C) is 10% by mass or more, it can be sufficiently adhered to a polypropylene container or a polystyrene container without impairing the opening strength. When the content of the tackifier resin (C) is 30% by mass or less, cracking of the molten film is unlikely to occur, and the extruded laminating workability is excellent.
The content of the tackifier resin (C) is preferably 20 to 30% by mass from the viewpoint of film forming property, easy opening property, and peeling feeling.
粘着付与樹脂（Ｃ）の軟化点は、ヒートシール時の接着性、即ち易開封性の観点から、好ましくは１２０℃以下であり、より好ましくは１００～１２０℃である。なお、本明細書における軟化点とは、ＪＩＳ．Ｋ ６８６３に準拠して求めることができる。 The softening point of the tackifier resin (C) is preferably 120 ° C. or lower, more preferably 100 to 120 ° C., from the viewpoint of adhesiveness at the time of heat sealing, that is, easy opening. The softening point in the present specification is defined as JIS. It can be obtained in accordance with K 6863.
粘着付与樹脂（Ｃ）の示差走査型熱量計により測定した融点は、好ましくは５５～１００℃であり、より好ましくは６０～８０℃である。 The melting point of the tackifier resin (C) measured by a differential scanning calorimeter is preferably 55 to 100 ° C, more preferably 60 to 80 ° C.
＜接着性樹脂組成物＞
本発明の接着性樹脂組成物は、前述のエチレン－酢酸ビニル共重合体（Ａ）、直鎖状低密度ポリエチレン（Ｂ）及び粘着付与樹脂（Ｃ）を公知の方法で混合し、製造することができる。このような製造法としては例えば、各成分をヘンシェルミキサー、タンブラーミキサーなどの混合装置に投入し、ブレンド時間５～２０分間で混合した後、押出機に入れ、加熱混練した後、押し出す方法が挙げられる。押出工程は、通常１５０～２００℃で行われる。押出物は通常ペレット形状とされ、後の工程で利用される。押出機としては、二軸押出機が好適に用いられるが、これに限られるものではない。
<Adhesive resin composition>
The adhesive resin composition of the present invention is produced by mixing the above-mentioned ethylene-vinyl acetate copolymer (A), linear low-density polyethylene (B) and tackifier resin (C) by a known method. Can be done. Examples of such a manufacturing method include a method in which each component is put into a mixing device such as a Henschel mixer or a tumbler mixer, mixed for a blending time of 5 to 20 minutes, placed in an extruder, heated and kneaded, and then extruded. Be done. The extrusion process is usually carried out at 150-200 ° C. The extruded product is usually in the form of pellets and is used in a later process. As the extruder, a twin-screw extruder is preferably used, but the extruder is not limited to this.
本発明の接着性樹脂組成物における、エチレン－酢酸ビニル共重合体（Ａ）、直鎖状低密度ポリエチレン（Ｂ）及び粘着付与樹脂（Ｃ）の合計量は、接着性樹脂組成物を基準として、好ましくは９５質量％以上であり、より好ましくは９８質量％以上である。 The total amount of the ethylene-vinyl acetate copolymer (A), the linear low-density polyethylene (B) and the tackifier resin (C) in the adhesive resin composition of the present invention is based on the adhesive resin composition. , It is preferably 95% by mass or more, and more preferably 98% by mass or more.
接着性樹脂組成物のメルトマスフローレイトは、好ましくは１～２０ｇ／１０分の範囲であり、より好ましくは１～１５ｇ／１０分の範囲である。上記範囲であると、ポリプロピレン容器やポリスチレン容器に対して接着性に優れる点で好ましい。 The melt mass flow rate of the adhesive resin composition is preferably in the range of 1 to 20 g / 10 minutes, more preferably in the range of 1 to 15 g / 10 minutes. The above range is preferable in that it has excellent adhesiveness to polypropylene containers and polystyrene containers.
本発明の接着性樹脂組成物には、本発明の効果を損なわない範囲で、エチレン－酢酸ビニル共重合体（Ａ）、直鎖状低密度ポリエチレン（Ｂ）及び粘着付与樹脂（Ｃ）以外の樹脂や添加剤を配合してもよい。 The adhesive resin composition of the present invention contains other than the ethylene-vinyl acetate copolymer (A), the linear low-density polyethylene (B) and the tackifier resin (C) as long as the effects of the present invention are not impaired. A resin or an additive may be blended.
さらに含有してもよい樹脂としては、例えば、高密度ポリエチレン、ポリプロピレンのようなポリオレフィン樹脂及びその酸化物やマレイン酸変性物；エチレン－アクリル酸共重合体、エチレン－（メタ）アクリル酸共重合体のようなエチレン－不飽和モノカルボン酸共重合体及びその金属塩；高密度ポリエチレンワックス、ポリプロピレンワックス、フィッシャートロプシュワックス、パラフィンワックス、酸化ワックス、マレイン酸変性ワックスのようなワックス類；が挙げられる。このような樹脂は、１種を単独で用いてもよいし、２種以上を併用してもよい。 Further, as the resin that may be contained, for example, a polyolefin resin such as high-density polyethylene and polypropylene and an oxide thereof or a maleic acid modified product; an ethylene-acrylic acid copolymer, an ethylene- (meth) acrylic acid copolymer. Ethylene-unsaturated monocarboxylic acid copolymers and metal salts thereof such as; waxes such as high density polyethylene wax, polypropylene wax, Fishertroph wax, paraffin wax, oxide wax, maleic acid modified wax; As such a resin, one kind may be used alone, or two or more kinds may be used in combination.
さらに含有してもよい添加剤は、熱劣化、熱分解、ブロッキング等を防止する目的、及び、フィルム加工、押出ラミネート加工等の加工適正を確保する目的で用いることができる。このような添加剤としては、例えば、エルカ酸アミド等の有機滑剤、炭酸カルシウム等の無機滑剤、ヒンダードフェノール等の酸化防止剤、その他ブロッキング防止剤、帯電防止剤、充填剤、防曇剤、非晶質アルミノケイ酸塩、二酸化ケイ素が挙げられる。 Further, the additives that may be contained can be used for the purpose of preventing thermal deterioration, thermal decomposition, blocking and the like, and for the purpose of ensuring processing suitability such as film processing and extrusion laminating processing. Examples of such additives include organic lubricants such as erucic acid amide, inorganic lubricants such as calcium carbonate, antioxidants such as hindered phenol, other antiblocking agents, antistatic agents, fillers and antifogging agents. Amorphous aluminosilicates and silicon dioxide can be mentioned.
これら樹脂及び添加剤は、エチレン－酢酸ビニル共重合体（Ａ）、直鎖状低密度ポリエチレン（Ｂ）及び粘着付与樹脂（Ｃ）を混合する際に配合してもよいし、予めエチレン－酢酸ビニル共重合体（Ａ）、直鎖状低密度ポリエチレン（Ｂ）又は粘着付与樹脂（Ｃ）のいずれかに配合してもよい。 These resins and additives may be blended when mixing the ethylene-vinyl acetate copolymer (A), the linear low-density polyethylene (B) and the tackifier resin (C), or ethylene-acetic acid in advance. It may be blended with any of vinyl copolymer (A), linear low-density polyethylene (B) or tackifier resin (C).
＜シート＞
次に、基材上に、本発明の接着性樹脂組成物の塗膜（以下、接着剤層ともいう）が配置されたシートについて説明する。接着性樹脂組成物の基材への配置方法としては、特に制限されず、例えば、前述のようにペレット化された接着性樹脂組成物をインフレーション法又はキャスト法などによりフィルム化し、得られたフィルムと基材と積層する方法、又は、混練された接着性樹脂組成物を直接基材に被覆する方法が挙げられる。フィルムと基材とは、別の接着剤層を介して積層されていてもよい。
<Sheet>
Next, a sheet in which a coating film (hereinafter, also referred to as an adhesive layer) of the adhesive resin composition of the present invention is arranged on a base material will be described. The method for arranging the adhesive resin composition on the substrate is not particularly limited, and for example, a film obtained by forming a film of the pelleted adhesive resin composition as described above by an inflation method, a casting method, or the like. A method of laminating the base material with the base material, or a method of directly coating the kneaded adhesive resin composition on the base material can be mentioned. The film and the base material may be laminated via different adhesive layers.
基材としては、長尺及びカットされた短尺のフィルム、シートを包含し、ポリエステルフィルム、ポリアミドフィルム、ポリプロピレンフィルム等の延伸又は未延伸フィルムといった単層フィルムのほか、樹脂ラミネートされたような複数の層を有する積層物であってもよい。例えば、ポリエチレン系樹脂を予めラミネートされている基材を用いる場合、接着性樹脂組成物をダイレクトに押出しラミネートしてシートを製造することができる。また、接着性樹脂組成物を、ポリエチレンやポリプロピレン等との共押出しで多層フィルムとし、ドライラミネーション又はサンドラミネーションにより、基材フィルムと積層することでシートを得ることができる。
基材と接着性樹脂組成物の被膜との接着性を向上させるために、基材表面が、火炎処理、オゾン処理、コロナ放電処理又はアンカーコート剤のような処理を行われていてもよい。
本発明の接着性樹脂組成物の被膜の厚みは、好ましくは５μｍ以上、より好ましくは１０μｍ以上である。
The base material includes long and cut short films and sheets, and includes a single-layer film such as a polyester film, a polyamide film, a stretched or unstretched film such as a polypropylene film, and a plurality of resin-laminated films. It may be a laminate having a layer. For example, when a base material to which a polyethylene resin is laminated in advance is used, the adhesive resin composition can be directly extruded and laminated to produce a sheet. Further, a sheet can be obtained by coextruding the adhesive resin composition with polyethylene, polypropylene or the like to form a multilayer film, and laminating it with a base film by dry lamination or sand lamination.
In order to improve the adhesiveness between the base material and the coating film of the adhesive resin composition, the surface of the base material may be subjected to a treatment such as flame treatment, ozone treatment, corona discharge treatment or anchor coating agent.
The thickness of the coating film of the adhesive resin composition of the present invention is preferably 5 μm or more, more preferably 10 μm or more.
本発明のシートは、後述の蓋材として用いることができるだけでなく、シーラントフィルムとして接着性樹脂組成物の被膜を内面としてシールする製袋品にも好適に使用できる。 The sheet of the present invention can be used not only as a lid material described later, but also suitably used as a sealant film for a bag-making product that seals a film of an adhesive resin composition as an inner surface.
＜蓋材＞
基材上に接着性樹脂組成物の塗膜が積層された本発明のシートは、密封対象である容器本体の開口形状に合わせて裁断され蓋材として好適に用いられる。
本発明のシートを蓋材として用いる場合、基材としては種々の基材を用いることができる。使用される基材としては、例えば、紙、アルミニウム、ポリエステル、ポリエチレン、ポリプロピレン、ポリスチレン、アルミ蒸着ポリエステル、アルミ蒸着ポリプロピレン又はシリカ蒸着ポリエステルが挙げられる。このような基材は、単層である必要はなく、二層以上の積層物であっても良い。
また、本発明のシートにより蓋材を形成する場合、好ましい基材としては、例えば、厚み５～２０μｍのポリエチレンテレフタレート（以下、ＰＥＴ）と、厚み５～３０μｍのポリエチレンとの積層フィルムが挙げられる。
また、蓋材としては、前記積層フィルムのポリエチレン面に、本発明の接着性樹脂組成物から形成される厚み５～４０μｍの被膜を積層したものが好ましい。
<Cover material>
The sheet of the present invention in which the coating film of the adhesive resin composition is laminated on the base material is cut according to the opening shape of the container body to be sealed and is suitably used as a lid material.
When the sheet of the present invention is used as a lid material, various base materials can be used as the base material. Examples of the base material used include paper, aluminum, polyester, polyethylene, polypropylene, polystyrene, aluminum-deposited polyester, aluminum-deposited polypropylene, and silica-deposited polyester. Such a base material does not have to be a single layer, and may be a laminate having two or more layers.
When the lid material is formed from the sheet of the present invention, a preferable base material is, for example, a laminated film of polyethylene terephthalate (hereinafter referred to as PET) having a thickness of 5 to 20 μm and polyethylene having a thickness of 5 to 30 μm.
Further, as the lid material, one in which a coating film having a thickness of 5 to 40 μm formed from the adhesive resin composition of the present invention is laminated on the polyethylene surface of the laminated film is preferable.
＜容器用部材セット、容器＞
容器本体と上記蓋材とを組み合わせたものが容器用部材セットであり、容器本体の開口部が、上記蓋材により密封されたものが容器であり、本発明における容器は開封可能なものである。上記容器は、特に制限されないが、好ましくはプラスチック樹脂製の容器、若しくは内面がプラスチック樹脂で覆われた容器である。なかでも、本発明の接着性樹脂組成物は、ポリプロピレン容器やポリスチレン容器に対する易開封性及び耐ボイル性に優れるため、ポリプロピレン樹脂製若しくはポリスチレン樹脂製の容器本体、又は、内面がポリプロピレン樹脂若しくはポリスチレン樹脂で覆われた容器本体に対して、好適に用いられる。
すなわち、本発明の容器として好ましくは、ポリプロピレン樹脂製若しくはポリスチレン樹脂製の容器本体、又は、内面がポリプロピレン樹脂若しくはポリスチレン樹脂で覆われた容器本体の開口部が、上記蓋材により密封されたものである。
<Container member set, container>
The combination of the container body and the lid material is a container member set, the opening of the container body is sealed with the lid material is the container, and the container in the present invention can be opened. .. The container is not particularly limited, but is preferably a container made of plastic resin or a container whose inner surface is covered with plastic resin. Among them, the adhesive resin composition of the present invention is excellent in openability and boil resistance for polypropylene containers and polystyrene containers, so that the container body is made of polypropylene resin or polystyrene resin, or the inner surface is polypropylene resin or polystyrene resin. It is preferably used for the container body covered with.
That is, the container of the present invention is preferably a container body made of polypropylene resin or polystyrene resin, or an opening of the container body whose inner surface is covered with polypropylene resin or polystyrene resin is sealed with the above-mentioned lid material. be.
以下に、本発明を実施例に基づいて説明するが、本発明はこれによって限定されるものではない。なお、実施例中、「部」及び「％」は、各々「質量部」及び「質量％」を表す。 Hereinafter, the present invention will be described based on examples, but the present invention is not limited thereto. In the examples, "parts" and "%" represent "parts by mass" and "% by mass", respectively.
［メルトマスフローレイト（ＭＦＲ）］
ＭＦＲは、ＪＩＳ．Ｋ７２１０に準拠し、メルトインデクサーＬ２４４（宝工業株式会社製）の内径９．５５ｍｍ、長さ１６２ｍｍのシリンダにサンプルを充填し、１９０℃で溶融した後、重さ２１６０ｇ、直径９．４８ｍｍのプランジャーを使用して均等に荷重をかけ、シリンダの中央に設けた径２．１ｍｍのオリフィスより単位時間あたりに押出される樹脂量（ｇ／１０分）から求めた。
[Melt Mass Flow Rate (MFR)]
MFR is JIS. Based on K7210, a melt indexer L244 (manufactured by Takara Kogyo Co., Ltd.) with an inner diameter of 9.55 mm and a length of 162 mm is filled with a sample, melted at 190 ° C, and then weighs 2160 g and has a diameter of 9.48 mm. A load was evenly applied using a jar, and the amount was determined from the amount of resin (g / 10 minutes) extruded from an orifice having a diameter of 2.1 mm provided in the center of the cylinder per unit time.
＜接着性樹脂組成物の製造方法＞
［実施例１～９及び比較例１～５］
（接着性樹脂組成物（Ｓ－１）～（Ｓ－１４）の製造）
表１に記載のエチレン－酢酸ビニル共重合体（Ａ）、直鎖状低密度ポリエチレン（Ｂ）、粘着付与樹脂（Ｃ）及び添加剤を、ヘンシェルミキサーで５分間プリブレンドした。ホッパーにプリブレンド物を投入し、スクリューフィーダーを用いて下記押出機に供給し、ペレット状の接着性樹脂組成物（Ｓ－１）～（Ｓ－１４）を製造した。
≪押出機条件≫
押出機：アイ・ケー・ジー社製同方向回転二軸押出機ＰＭＴ３２－４０．５
バレル温度：１６０℃（供給口１５０℃）
スクリュー回転速度：２００ｒｐｍ
供給速度：１０ｋｇ／ｈｒ
<Manufacturing method of adhesive resin composition>
[Examples 1 to 9 and Comparative Examples 1 to 5]
(Manufacturing of Adhesive Resin Compositions (S-1) to (S-14))
The ethylene-vinyl acetate copolymer (A), linear low-density polyethylene (B), tackifier resin (C) and additives shown in Table 1 were pre-blended with a Henschel mixer for 5 minutes. The preblended product was put into a hopper and supplied to the following extruder using a screw feeder to produce pellet-shaped adhesive resin compositions (S-1) to (S-14).
≪Extruder conditions≫
Extruder: IKG Co., Ltd. Same-direction rotary twin-screw extruder PMT32-40.5
Barrel temperature: 160 ° C (supply port 150 ° C)
Screw rotation speed: 200 rpm
Supply speed: 10 kg / hr
＜接着性樹脂組成物の評価＞
得られた接着性樹脂組成物について以下の評価を行った。結果を表１に示す。
<Evaluation of adhesive resin composition>
The following evaluation was performed on the obtained adhesive resin composition. The results are shown in Table 1.
［成膜性］
接着性樹脂組成物の成膜性は、ＰＥＴ１２μｍ／ポリエチレン（ＰＥ）２５μｍ基材のＰＥ面に、下記加工条件において、接着剤層の厚みが２０μｍとなるように、樹脂温度を２００～２６０℃のいずれかに調整した場合における塗工の可否と、得られた塗工物から膜厚計を用いて無作為に選択した１０カ所の被膜厚みから、下記基準で評価した。
≪加工条件≫
押出しラミネーター：ムサシノキカイ製４００Ｍ／ＭテストＥＸＴラミネーターダイ直下樹脂温度：２００～２６０℃（接着性樹脂組成物のＭＦＲ等により適宜調整した）
加工速度：３０ｍ／分
Ｔダイ幅：４００ｍｍ
冷却ロール表面温度：２０℃
Ａ：塗工可能、かつ、１０カ所の被膜厚みが２０±５μｍの範囲内：良好
Ｃ：膜割れ若しくは膜切れのいずれかが発生し塗工不可、又は、塗工可能だが１０カ所の被膜厚みが２０±５μｍの範囲外：不良
[Film film property]
The film-forming property of the adhesive resin composition is such that the thickness of the adhesive layer is 20 μm on the PE surface of a PET 12 μm / polyethylene (PE) 25 μm substrate under the following processing conditions, and the resin temperature is 200 to 260 ° C. The film thickness was evaluated according to the following criteria based on the availability of coating in the case of adjusting to either one, and the film thickness at 10 locations randomly selected from the obtained coated products using a film thickness meter.
≪Processing conditions≫
Extruded laminator: 400M / M test EXT laminator made by Musashinokikai Resin temperature directly under the die: 200-260 ° C (adjusted appropriately by MFR etc. of adhesive resin composition)
Processing speed: 30 m / min T die width: 400 mm
Cooling roll surface temperature: 20 ° C
A: Can be applied, and the film thickness at 10 locations is within the range of 20 ± 5 μm: Good C: Coating is not possible due to either film cracking or film breakage, or coating is possible but the film thickness at 10 locations Is out of the range of 20 ± 5 μm: defective
［シート（蓋材）の作製方法］
得られた接着性樹脂組成物を、下記加工条件において、押出しラミネーターを用いて、ＰＥＴ１２μｍ／ＰＥ２５μｍの基材のＰＥ面に積層してシートを作製した。接着剤層の厚みは２０μｍであった。
≪加工条件≫
押出しラミネーター：ムサシノキカイ製４００Ｍ／ＭテストＥＸＴラミネーターダイ直下樹脂温度：２００℃～２５０℃（接着性樹脂組成物のＭＦＲ等により適宜調整した）
加工速度：３０ｍ／分
Ｔダイ幅：４００ｍｍ
冷却ロール表面温度：２０℃
[How to make a sheet (closure material)]
The obtained adhesive resin composition was laminated on the PE surface of a base material of PET 12 μm / PE 25 μm using an extruded laminator under the following processing conditions to prepare a sheet. The thickness of the adhesive layer was 20 μm.
≪Processing conditions≫
Extruded laminator: 400M / M test EXT laminator made by Musashinokikai Resin temperature directly under the die: 200 ° C to 250 ° C (adjusted appropriately by MFR etc. of adhesive resin composition)
Processing speed: 30 m / min T die width: 400 mm
Cooling roll surface temperature: 20 ° C
［易開封性］
得られた積層シート（蓋材）を９０ｍｍ×９０ｍｍのサイズに裁断後、ゲージ圧０．３ＭＰａ、１６０℃、１秒間にて、ポリプロピレン容器（７１ｍｍΦ）及びポリスチレン容器（７１ｍｍΦ）それぞれに、接着性樹脂組成物の被膜面を熱接着し、密封を行なった。温度２３℃湿度６５％の恒温恒湿室に２４時間放置し、同恒温恒湿室にて９０°角剥離、引張速度２００ｍｍ／分の条件で剥離強度の測定を行った。剥離強度の最大値を開封強度とし、易開封性を下記基準で評価した。
Ａ：剥離強度の最大値が、１０Ｎ以上１５Ｎ未満：良好
Ｂ：剥離強度の最大値が、５Ｎ以上 １０Ｎ未満：使用可能
Ｃ：剥離強度の最大値が、５Ｎ未満：不良
[Easy to open]
After cutting the obtained laminated sheet (cover material) into a size of 90 mm × 90 mm, the adhesive resin was applied to each of the polypropylene container (71 mmΦ) and the polystyrene container (71 mmΦ) at a gauge pressure of 0.3 MPa, 160 ° C. for 1 second. The coated surface of the composition was heat-bonded and sealed. It was left in a constant temperature and humidity chamber with a temperature of 23 ° C. and a humidity of 65% for 24 hours, and the peel strength was measured under the conditions of 90 ° square peeling and a tensile speed of 200 mm / min in the same constant temperature and humidity chamber. The maximum value of the peel strength was taken as the opening strength, and the easy opening property was evaluated according to the following criteria.
A: Maximum peel strength is 10N or more and less than 15N: Good B: Maximum peel strength is 5N or more and less than 10N: Usable C: Maximum peel strength is less than 5N: Defective
［耐ボイル性］
ポリプロピレン容器（７１ｍｍΦ）及びポリスチレン容器（７１ｍｍΦ）それぞれに、４０℃の水を充填し、該容器に、得られた積層シート（蓋材）の接着性樹脂組成物の被膜面を、ゲージ圧０．３ＭＰａ、１８０℃、１秒間にて熱接着し、密封を行った。得られた密封容器を９０℃熱湯水中に浸漬し、３０分後の破袋の有無を目視で観察し、下記基準で評価した。
Ａ：破袋しない（耐ボイル性あり）：良好
Ｃ：破袋する（耐ボイル性なし）：不良
[Boil resistance]
Each of the polypropylene container (71 mmΦ) and the polystyrene container (71 mmΦ) was filled with water at 40 ° C., and the coated surface of the adhesive resin composition of the obtained laminated sheet (cover material) was applied to the container at a gauge pressure of 0. The mixture was heat-bonded at 3 MPa and 180 ° C. for 1 second and sealed. The obtained sealed container was immersed in boiling water at 90 ° C., and after 30 minutes, the presence or absence of bag breakage was visually observed and evaluated according to the following criteria.
A: Does not break the bag (with boil resistance): Good C: Breaks the bag (without boil resistance): Defective
表１の略称を以下に示す。
Ａ１：エチレン－酢酸ビニル共重合体（酢酸ビニル含有率１２％）、密度０．９３１ｇ／ｃｍ3、ＤＳＣ融点９５℃、ＭＦＲ０．８ｇ／１０分
Ａ２：エチレン－酢酸ビニル共重合体（酢酸ビニル含有率６％）、密度０．９２５ｇ／ｃｍ3、ＤＳＣ融点９８℃、ＭＦＲ８．５ｇ／１０分
The abbreviations in Table 1 are shown below.
A1: Ethylene-vinyl acetate copolymer (vinyl acetate content 12%), density 0.931 g / cm 3 , DSC melting point 95 ° C, MFR 0.8 g / 10 minutes A2: Ethylene-vinyl acetate copolymer (containing vinyl acetate) Rate 6%), density 0.925 g / cm 3 , DSC melting point 98 ° C, MFR 8.5 g / 10 minutes
Ｂ１：直鎖状低密度ポリエチレン、密度０．９２２ｇ／ｃｍ3、ＤＳＣ融点１０６℃、ＭＦＲ１５．０ｇ／１０分
Ｂ２：直鎖状低密度ポリエチレン、密度０．９３６ｇ／ｃｍ3、ＤＳＣ融点１２４℃、ＭＦＲ２．０ｇ／１０分
B1: Linear low density polyethylene, density 0.922 g / cm 3 , DSC melting point 106 ° C, MFR 15.0 g / 10 minutes B2: Linear low density polyethylene, density 0.936 g / cm 3 , DSC melting point 124 ° C, MFR 2.0g / 10 minutes
Ｃ１：部分水添脂環族炭化水素樹脂、軟化点１１０℃、ＤＳＣ融点７１℃
Ｃ２：部分水添脂環族炭化水素樹脂、軟化点１０５℃、ＤＳＣ融点６３℃
Ｃ３：部分水添脂環族炭化水素樹脂、軟化点１３６℃、ＤＳＣ融点９２℃
Ｃ４：部分水添脂環族炭化水素樹脂、軟化点１１５℃、ＤＳＣ融点６９℃
Ｃ５：完全水添脂環族炭化水素樹脂、軟化点１２５℃、ＤＳＣ融点７７℃
C1: Partially hydrogenated alicyclic hydrocarbon resin, softening point 110 ° C, DSC melting point 71 ° C
C2: Partially hydrogenated alicyclic hydrocarbon resin, softening point 105 ° C, DSC melting point 63 ° C
C3: Partially hydrogenated alicyclic hydrocarbon resin, softening point 136 ° C, DSC melting point 92 ° C
C4: Partially hydrogenated alicyclic hydrocarbon resin, softening point 115 ° C, DSC melting point 69 ° C
C5: Completely hydrogenated alicyclic hydrocarbon resin, softening point 125 ° C, DSC melting point 77 ° C
Ｄ１：低密度ポリエチレン、密度０．９１５ｇ／ｃｍ3、ＤＳＣ融点９８℃、ＭＦＲ１４５ｇ／１０分 D1: Low density polyethylene, density 0.915 g / cm 3 , DSC melting point 98 ° C, MFR 145 g / 10 minutes
スリップ剤：エルカ酸アミド、ＤＳＣ融点８０℃
酸化防止剤：ヒンダードフェノール系酸化防止剤
ブロッキング防止剤：非晶質アルミノケイ酸塩
Slip agent: erucic acid amide, DSC melting point 80 ° C
Antioxidant: Hindered Phenolic Antioxidant Antiblocking Agent: Amorphous Aluminosilicate
表１の結果により、本発明の接着性樹脂組成物は、優れた成膜性と易開封性、耐ボイル性を示した。特に、エチレン－酢酸ビニル共重合体（Ａ）４５～７０質量％、直鎖状低密度ポリエチレン（Ｂ）１５～４０質量％、及び粘着付与樹脂（Ｃ）１５～３０質量％であると成膜性に優れていた。また、エチレン－酢酸ビニル共重合体（Ａ）４５～７０質量％、直鎖状低密度ポリエチレン（Ｂ）１５～４５質量％、及び粘着付与樹脂（Ｃ）１５～３０質量％であると、成膜性に優れ、かつポリプロピレン、ポリスチレンなどのプラスチック容器に対して易開封性、剥離感及び耐ボイル性に優れていた。よって、特定の樹脂（Ａ）～（Ｃ）を特定比率で含む本願発明の接着性樹脂組成物は、ポリプロピレン、ポリスチレンからなる容器向け蓋材用として最適である。 From the results shown in Table 1, the adhesive resin composition of the present invention showed excellent film forming property, easy opening property, and boil resistance. In particular, when the ethylene-vinyl acetate copolymer (A) is 45 to 70% by mass, the linear low-density polyethylene (B) is 15 to 40% by mass, and the tackifier resin (C) is 15 to 30% by mass, the film is formed. It was excellent in sex. Further, the ethylene-vinyl acetate copolymer (A) is 45 to 70% by mass, the linear low-density polyethylene (B) is 15 to 45% by mass, and the tackifier resin (C) is 15 to 30% by mass. It was excellent in film properties, and was excellent in easy-opening property, peeling feeling, and boil resistance for plastic containers such as polypropylene and polystyrene. Therefore, the adhesive resin composition of the present invention containing a specific resin (A) to (C) in a specific ratio is most suitable for a lid material for a container made of polypropylene or polystyrene.
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| KR1020210076809A KR102494474B1 (en) | 2020-06-22 | 2021-06-14 | Adhesive resin composition, sheet using this composition, lid material, set of members for container, and container |
| TW110122413A TWI799898B (en) | 2020-06-22 | 2021-06-18 | Adhesive resin composition, sheet, lid, member set for container, and container |
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