WO2022097658A1 - Laminate and container - Google Patents
Laminate and container Download PDFInfo
- Publication number
- WO2022097658A1 WO2022097658A1 PCT/JP2021/040482 JP2021040482W WO2022097658A1 WO 2022097658 A1 WO2022097658 A1 WO 2022097658A1 JP 2021040482 W JP2021040482 W JP 2021040482W WO 2022097658 A1 WO2022097658 A1 WO 2022097658A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- resin composition
- surface layer
- laminate according
- less
- mass
- Prior art date
Links
- 239000002344 surface layer Substances 0.000 claims abstract description 119
- -1 polyethylene Polymers 0.000 claims abstract description 104
- 239000011342 resin composition Substances 0.000 claims abstract description 93
- 239000004698 Polyethylene Substances 0.000 claims abstract description 60
- 229920000573 polyethylene Polymers 0.000 claims abstract description 60
- 239000010410 layer Substances 0.000 claims abstract description 53
- 239000004743 Polypropylene Substances 0.000 claims abstract description 38
- 229920001155 polypropylene Polymers 0.000 claims abstract description 38
- 238000002844 melting Methods 0.000 claims description 24
- 230000008018 melting Effects 0.000 claims description 24
- 229920005629 polypropylene homopolymer Polymers 0.000 claims description 20
- 229920001971 elastomer Polymers 0.000 claims description 18
- 239000000806 elastomer Substances 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 12
- 239000002667 nucleating agent Substances 0.000 claims description 12
- 230000004888 barrier function Effects 0.000 claims description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 6
- 229910052760 oxygen Inorganic materials 0.000 claims description 6
- 239000001301 oxygen Substances 0.000 claims description 6
- 229920000089 Cyclic olefin copolymer Polymers 0.000 claims description 5
- 229920000219 Ethylene vinyl alcohol Polymers 0.000 claims description 5
- 229920005989 resin Polymers 0.000 claims description 5
- 239000011347 resin Substances 0.000 claims description 5
- 239000004711 α-olefin Substances 0.000 claims description 5
- 239000004715 ethylene vinyl alcohol Substances 0.000 claims description 4
- RZXDTJIXPSCHCI-UHFFFAOYSA-N hexa-1,5-diene-2,5-diol Chemical compound OC(=C)CCC(O)=C RZXDTJIXPSCHCI-UHFFFAOYSA-N 0.000 claims description 3
- 239000000155 melt Substances 0.000 claims description 3
- 229920001903 high density polyethylene Polymers 0.000 description 14
- 239000004700 high-density polyethylene Substances 0.000 description 14
- 229910052751 metal Chemical class 0.000 description 9
- 239000002184 metal Chemical class 0.000 description 9
- 150000003839 salts Chemical class 0.000 description 9
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 7
- 229920001684 low density polyethylene Polymers 0.000 description 7
- 239000004702 low-density polyethylene Substances 0.000 description 7
- 239000011229 interlayer Substances 0.000 description 6
- 238000000465 moulding Methods 0.000 description 6
- FBPFZTCFMRRESA-FSIIMWSLSA-N D-Glucitol Natural products OC[C@H](O)[C@H](O)[C@@H](O)[C@H](O)CO FBPFZTCFMRRESA-FSIIMWSLSA-N 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 238000007789 sealing Methods 0.000 description 5
- 239000000600 sorbitol Substances 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 230000032798 delamination Effects 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- FMZUHGYZWYNSOA-VVBFYGJXSA-N (1r)-1-[(4r,4ar,8as)-2,6-diphenyl-4,4a,8,8a-tetrahydro-[1,3]dioxino[5,4-d][1,3]dioxin-4-yl]ethane-1,2-diol Chemical compound C([C@@H]1OC(O[C@@H]([C@@H]1O1)[C@H](O)CO)C=2C=CC=CC=2)OC1C1=CC=CC=C1 FMZUHGYZWYNSOA-VVBFYGJXSA-N 0.000 description 3
- 229940087101 dibenzylidene sorbitol Drugs 0.000 description 3
- 238000000113 differential scanning calorimetry Methods 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 229920005672 polyolefin resin Polymers 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229910019142 PO4 Inorganic materials 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000012790 adhesive layer Substances 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- 235000013361 beverage Nutrition 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 2
- 239000010432 diamond Substances 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- 235000013305 food Nutrition 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 229920001179 medium density polyethylene Polymers 0.000 description 2
- 239000004701 medium-density polyethylene Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000010452 phosphate Substances 0.000 description 2
- 229920001225 polyester resin Polymers 0.000 description 2
- 239000004645 polyester resin Substances 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 239000000454 talc Substances 0.000 description 2
- 229910052623 talc Inorganic materials 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241001391944 Commicarpus scandens Species 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 239000004594 Masterbatch (MB) Substances 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- RSWGJHLUYNHPMX-ONCXSQPRSA-N abietic acid Chemical compound C([C@@H]12)CC(C(C)C)=CC1=CC[C@@H]1[C@]2(C)CCC[C@@]1(C)C(O)=O RSWGJHLUYNHPMX-ONCXSQPRSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- CSJKPFQJIDMSGF-UHFFFAOYSA-K aluminum;tribenzoate Chemical compound [Al+3].[O-]C(=O)C1=CC=CC=C1.[O-]C(=O)C1=CC=CC=C1.[O-]C(=O)C1=CC=CC=C1 CSJKPFQJIDMSGF-UHFFFAOYSA-K 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- GBAOBIBJACZTNA-UHFFFAOYSA-L calcium sulfite Chemical compound [Ca+2].[O-]S([O-])=O GBAOBIBJACZTNA-UHFFFAOYSA-L 0.000 description 1
- 235000010261 calcium sulphite Nutrition 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 229910052570 clay Inorganic materials 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- NJLLQSBAHIKGKF-UHFFFAOYSA-N dipotassium dioxido(oxo)titanium Chemical compound [K+].[K+].[O-][Ti]([O-])=O NJLLQSBAHIKGKF-UHFFFAOYSA-N 0.000 description 1
- 239000010459 dolomite Substances 0.000 description 1
- 229910000514 dolomite Inorganic materials 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 150000003949 imides Chemical class 0.000 description 1
- 239000011256 inorganic filler Substances 0.000 description 1
- 229910003475 inorganic filler Inorganic materials 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 229940127554 medical product Drugs 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 1
- 229910052901 montmorillonite Inorganic materials 0.000 description 1
- QZLPDBKEVWFQNF-UHFFFAOYSA-N n,n'-diphenylhexanediamide Chemical compound C=1C=CC=CC=1NC(=O)CCCCC(=O)NC1=CC=CC=C1 QZLPDBKEVWFQNF-UHFFFAOYSA-N 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-N phosphoric acid Substances OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920005990 polystyrene resin Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 150000004053 quinones Chemical class 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 230000001953 sensory effect Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000001601 sodium adipate Substances 0.000 description 1
- 235000011049 sodium adipate Nutrition 0.000 description 1
- WXMKPNITSTVMEF-UHFFFAOYSA-M sodium benzoate Chemical compound [Na+].[O-]C(=O)C1=CC=CC=C1 WXMKPNITSTVMEF-UHFFFAOYSA-M 0.000 description 1
- 239000012321 sodium triacetoxyborohydride Substances 0.000 description 1
- LKYIPGJOXSVWPX-UHFFFAOYSA-M sodium;thiophene-2-carboxylate Chemical compound [Na+].[O-]C(=O)C1=CC=CS1 LKYIPGJOXSVWPX-UHFFFAOYSA-M 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical class [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
-
- 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
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
-
- 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
- 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
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
Definitions
- the present invention relates to a laminate and a container.
- a polyolefin resin is often used as a material having excellent impact resistance.
- a laminate that is not easily affected by the heat treatment in the heat sterilization step is preferably used.
- Patent Document 1 in a sheet composed of a base material layer and a seal layer, by using a polymer component derived from propylene for the seal layer, excellent blocking resistance, heat seal strength and impact resistance are obtained, and appearance defects due to heat treatment are deteriorated. Techniques for mitigation are described.
- Patent Document 1 the laminate described in Patent Document 1 is not used for a container whose opening is facilitated by using, for example, delamination because the delamination property between layers and the edge cutting property of the layer after delamination are low. .. Further, there is no mention of the peelability when the molded containers are overlapped with each other.
- an object of the present invention is to provide a laminated body and a container which can be easily opened by delamination of the container after molding and can easily peel off the stacked containers after molding.
- the first resin composition contains polypropylene in an amount of 80% by mass or more and 99% by mass or less, and polyethylene in an amount of 1% by mass or more and 20% by mass or less.
- the laminate according to [1] or [2], wherein the polyethylene contained in the first resin composition has a melting point of 115 ° C.
- the second resin composition contains an elastomer.
- the resin composition forming the surface layer contains polypropylene
- the resin composition forming the lower surface layer contains polypropylene and polyethylene, so that the surface layer and the lower surface layer are separated from each other. It is easy and the surface layer is easy to break at the edge of the joint region. Further, when the arithmetic average roughness Ra of the surface opposite to the lower surface layer of the surface layer is 0.5 ⁇ m or more, it becomes easy to peel off the stacked containers after molding.
- the main component of the resin composition forming each layer of the laminate means the resin component having the highest content in the resin composition forming the layer. Therefore, the resin composition may contain other components in addition to the main component.
- the main component can be confirmed by, for example, the IR method.
- the content of the components of the resin composition forming each layer of the laminate is expressed in mass% with respect to the entire resin composition forming the layer, unless otherwise specified.
- FIG. 1 is a schematic cross-sectional view showing the structure of the laminated body according to the first embodiment of the present invention.
- the laminate 10 has a surface layer 11, subsurface layers 12, 15 and base layers 13, 14.
- the laminate 10 has a thickness suitable for forming a container as described later, specifically, for example, 0.01 mm or more and 1.8 mm or less, preferably 0.1 mm or more and 1.6 mm or less, more preferably.
- the surface layer 11 is a layer that is joined to the lid body by a heat seal or the like when the laminated body 10 is formed into a container described later.
- the surface layer 11 is formed of a resin composition containing polypropylene as a main component.
- the resin composition forming the surface layer 11 (hereinafter, also referred to as the first resin composition) preferably contains homopolypropylene (HPP) from the viewpoint of improving the appearance after heating, but other than HPP, it is preferable.
- HPP homopolypropylene
- Polypropylene such as random polypropylene (RPP) or block polypropylene (BPP), polyethylene such as high density polyethylene (HDPE) or medium density polyethylene (MDPE), or linear ethylene- ⁇ -olefin copolymers and the like may be included.
- the first resin composition may contain a nucleating agent.
- the nucleating agent include organic carboxylic acid or a metal salt thereof, aromatic sulfonate or a metal salt thereof, an organic phosphoric acid compound or a metal salt thereof, dibenzylidene sorbitol or a derivative thereof, a partial metal salt of loginic acid, and an inorganic substance. Examples thereof include fine particles, imides, amides, quinacridones, quinones or mixtures thereof.
- Examples of the metal salt of the organic carboxylic acid include aluminum benzoate, pt-butyl aluminum benzoate, sodium adipate, sodium thiophenecarboxylate, sodium pyrolecarboxylate and the like.
- Examples of dibenzylidene sorbitol or a derivative thereof include dibenzylidene sorbitol, 1,3: 2,4-bis (o-3,4-dimethylbenzylidene) sorbitol, and 1,3: 2,4-bis (o-2,4-).
- Dimethylbenzylidene) sorbitol, 1,3: 2,4-bis (o-4-ethylbenzylidene) sorbitol, 1,3: 2,4-bis (o-4-chlorobenzylidene) sorbitol, 1,3: 2,4 -Givenzylidene sorbitol and the like can be mentioned.
- Specific examples thereof include “Gelall MD” and “Gelall MD-R” (trade name) manufactured by Shin Nihon Rika Co., Ltd.
- Examples of the rosin acid partial metal salt include "Pine Crystal KM1600", “Pine Crystal KM1500” and “Pine Crystal KM1300" (trade name) manufactured by Arakawa Chemical Industry Co., Ltd.
- Inorganic fine particles include talc, clay, mica, asbestos, glass fiber, glass flakes, glass beads, calcium silicate, montmorillonite, bentonite, graphite, aluminum powder, alumina, silica, diatomaceous soil, titanium oxide, magnesium oxide, pebbles.
- Examples thereof include powder, light stone balloon, aluminum hydroxide, magnesium hydroxide, basic magnesium carbonate, dolomite, calcium sulfate, potassium titanate, barium sulfate, calcium sulfite, molybdenum sulfide and the like.
- the amide compound include adipic acid dianilide and sperin acid dianilide.
- an organic phosphate metal salt (phosphate ester metal salt) represented by the following general formula from the viewpoint of high effect of increasing the crystallization rate.
- organophosphate metal salt include "Adecastab NA-11", “Adecastab NA-21”, “Adecastab NA-71”, “Adecastab M701” and “Adecastab M801” (all manufactured by Asahi Denka Co., Ltd.). Can be mentioned.
- the content of the nucleating agent is, for example, 500 ppm or more, preferably 800 ppm or more, more preferably 1250 ppm or more, and particularly preferably 1400 ppm or more.
- the content of the nucleating agent is preferably 10000 ppm or less, more preferably 5000 ppm or less, and further preferably 3000 ppm or less.
- the edge cutting property of the surface layer 11, that is, the easiness of breaking at the time of opening is improved.
- the thickness of the surface layer 11 is preferably 5 ⁇ m or more and 40 ⁇ m or less, and more preferably 10 ⁇ m or more and 30 ⁇ m or less.
- the arithmetic average roughness Ra of the surface of the surface layer 11 opposite to the surface lower layer 12 is 0.5 ⁇ m or more.
- the arithmetic mean roughness Ra is defined in JIS B0601.
- the arithmetic average roughness Ra is preferably 0.6 ⁇ m or more, more preferably 0.7 ⁇ m or more, still more preferably 0.8 ⁇ m or more, and particularly preferably 1.0 ⁇ m or more.
- the upper limit of the arithmetic mean roughness Ra is not particularly limited, but is usually 3.0 ⁇ m or less.
- the first resin composition forming the surface layer 11 may contain polyethylene.
- the first resin composition may contain polypropylene in an amount of 80% by mass or more and 99% by mass or less, and polyethylene may be contained in an amount of 1% by mass or more and 20% by mass or less.
- the melting point of polyethylene contained in the first resin composition is, for example, 115 ° C. or higher, preferably 120 ° C. or higher, and more preferably 125 ° C. or higher.
- the melting point of polyethylene contained in the first resin composition is, for example, 135 ° C. or lower, preferably 140 ° C. or lower. When a plurality of types of polyethylene are contained, any one type of polyethylene may be in this range. By setting the melting point of polyethylene contained in the first resin composition within this range, the arithmetic average roughness Ra as described above can be realized.
- the melting point of polyethylene is set to a temperature range of 50 ° C. to 220 ° C. and a heating rate of 10 ° C./min using a differential scanning calorimetry device (DSC) (“Diamond DSC” manufactured by PerkinElmer Japan Co., Ltd.).
- DSC differential scanning calorimetry device
- the density of polyethylene contained in the first resin composition forming the surface layer 11 is, for example, 900 kg / m 3 or more, which is preferable. Is 925 kg / m 3 or more, more preferably 945 kg / m 3 or more.
- the density of polyethylene contained in the first resin composition forming the surface layer 11 is, for example, 990 kg / m 3 or less, preferably 970 kg / m 3 or less, and more preferably 966 kg / m 3 or less. ..
- the lower surface layer 12 is adjacent to the surface layer 11 and is formed of a resin composition containing polypropylene and polyethylene.
- the surface layer 12 contains polypropylene and polyethylene, so that the surface layer 11 and the surface layer 12 can be easily separated from each other.
- the resin composition forming the surface lower layer 12 (hereinafter, also referred to as a second resin composition) may contain polypropylene in an amount of 15% by mass or more and 58% by mass or less.
- the second resin composition may contain at least two types of polyethylene having different melting points from each other.
- the melting point of the first type of polyethylene contained in the second resin composition is, for example, 115 ° C. or higher, preferably 120 ° C. or higher, and more preferably 125 ° C. or higher.
- the melting point of polyethylene contained in the first type of second resin composition is, for example, 140 ° C. or lower, preferably 135 ° C. or lower.
- the melting point of the second type of polyethylene contained in the second resin composition is, for example, 80 ° C. or higher, preferably 90 ° C. or higher, and more preferably 100 ° C. or higher.
- the melting point of polyethylene contained in the second resin composition of the second category is, for example, 130 ° C.
- the lower surface layer 15 is located on the side opposite to the surface layer 11 and the lower surface layer 12 with the base material layers 13 and 14 interposed therebetween, and is formed of the same resin composition as the lower surface layer 12.
- the density of the second resin composition is, for example, 850 kg / m 3 or more, preferably 880 kg / m 3 or more, more preferably 900 kg / m 3 or more, and further preferably 915 kg / m 3 or more. ..
- the density of the second resin composition is, for example, 970 kg / m 3 or less, preferably 950 kg / m 3 or less, and more preferably 932 kg / m 3 or less.
- the density can be measured by, for example, an underwater substitution method.
- the second resin composition may contain at least two kinds of polyethylene having different densities from each other.
- the density of the first type of polyethylene contained in the second resin composition is, for example, 900 kg / m 3 or more, preferably 925 kg / m 3 or more, and more preferably 945 kg / m 3 or more.
- the density of the first type of polyethylene contained in the second resin composition is, for example, 990 kg / m 3 or less, preferably 970 kg / m 3 or less, and more preferably 966 kg / m 3 or less. ..
- the density of the second type of polyethylene contained in the second resin composition is, for example, 880 kg / m 3 or more, preferably 903 kg / m 3 or more, and more preferably 910 kg / m 3 or more.
- the density of the second type of polyethylene contained in the second resin composition is, for example, 950 kg / m 3 or less, preferably 945 kg / m 3 or less, and more preferably 930 kg / m 3 or less. ..
- the content of polyethylene having a relatively high density contained in the second resin composition is preferably 20% by mass or more, more preferably 25% by mass or more, still more preferably 30% by mass or more. Further, 85% by mass or less is preferable, 80% by mass or less is more preferable, and 75% by mass or less is further preferable. Further, the content of polyethylene having a relatively low density when contained in the second resin composition is preferably 1% by mass or more, more preferably 2% by mass or more, still more preferably 3% by mass or more. Further, 45% by mass or less is preferable, 40% by mass or less is more preferable, and 35% by mass or less is further preferable.
- the polypropylene content and the polyethylene type density and content By setting the polypropylene content and the polyethylene type density and content, an appropriate interlayer bonding strength can be obtained between the surface layer 11 and the surface layer 12, and the surface layer 11 can be easily peeled off from the surface. The edge breakability of the layer 11 can be improved.
- the melting point and density of at least two types of polyethylene contained in the second resin composition within the above ranges, a more appropriate interlayer bonding strength can be obtained between the surface layer 11 and the surface layer 12. Therefore, the edge cutting property of the surface layer 11 can be better improved while facilitating the peeling of the surface layer 11.
- the base material layers 13 and 14 are laminated on the side opposite to the surface layer 11 with respect to the lower surface layer 12, and are formed of a resin containing at least one of the group consisting of, for example, an olefin resin, a polystyrene resin, and a polyester resin. Will be done.
- the olefin resin include polypropylene and polyethylene.
- the polyester resin include polyethylene terephthalate (PET).
- Inorganic fillers such as talc may be added to the base material layers 13 and 14 in order to improve the rigidity.
- An oxygen barrier layer containing an ethylene vinyl alcohol resin such as an ethylene-vinyl alcohol copolymer (EVOH) may be added between the substrate layers 13 and 14.
- the layer structure other than the surface layer 11 and the surface layer 12 is arbitrary, and an additional layer may be included depending on the required rigidity and barrier property, for example. Either layer may be omitted.
- FIG. 2 is a cross-sectional view showing an example of a container in which the laminate shown in FIG. 1 is molded.
- the container 100 shown in FIG. 2 includes a container body formed by molding the laminated body 10 and a lid body 20 joined to the container body.
- the container body is formed into a shape including the bottom surface portion 101, the side surface portion 102, and the flange portion 103, and the lid 20 is formed on the flange portion 103 in the joint region 105, for example, by heat sealing or the like on the container body. It is joined.
- the container body is molded so that the surface layer 11 of the laminated body 10 is on the inside.
- the surface layer 11 is on the storage space SP side, and in the joining region 105, the lid 20 and the surface layer 11 of the laminated body 10 are joined.
- the surface of the surface layer 11 is given an appropriate roughness as described above, so that the stacked containers can be easily peeled off from each other. If the surface of the surface layer 11 is excessively smooth, the air permeability between the containers is low and the adsorption force is large, which may make it difficult to peel off.
- the interlayer bonding strength between the surface layer 11 and the surface layer 12 of the laminate 10 constituting the container body is set between the lid 20 and the surface layer 11 in the bonding region 105. It can be weaker than the bond strength and the interlayer bond strength between the surface layer 12 and the substrate layer 13.
- the surface layer 11 is peeled off together with the lid 20 in the joint region 105, and the layer between the surface layer 11 and the surface layer 12 is interposed. Peel off.
- the lid 20 and the surface layer 11 are peeled off to the inner edge of the joint region 105, the surface layer 11 breaks (edge breakage), and thereafter only the lid 20 is peeled off from the container body.
- the resin composition (second resin composition) forming the surface lower layer 12 is polypropylene and one or more types of polyethylene. And an elastomer. Since the configuration of the present embodiment is the same as that of the first embodiment described above with respect to other points, a duplicate detailed description will be omitted.
- the melting point of polyethylene contained in the second resin composition is, for example, 115 ° C. or higher, preferably 120 ° C. or higher, and more preferably 125 ° C. or higher.
- the melting point of polyethylene contained in the second resin composition is, for example, 140 ° C. or lower, preferably 135 ° C. or lower.
- the elastomer contained in the second resin composition is not particularly limited, but is preferably an ethylene- ⁇ -olefin copolymer.
- the melt flow rate (MFR) of the elastomer is preferably 0.5 g / 10 minutes or more, and preferably 5.0 g / 10 minutes or less.
- the MFR of the elastomer is more preferably 0.8 g / 10 minutes or more, and further preferably 1.0 g / 10 minutes or more.
- the MFR of the elastomer is more preferably 4 g / 10 minutes or less, further preferably 3.5 g / 10 minutes or less, and particularly preferably 2 g / 10 minutes or less.
- the lower surface layer 15 is also formed of the same second resin composition as the lower surface layer 12.
- the density of the second resin composition is, for example, 850 kg / m 3 or more, preferably 880 kg / m 3 or more, more preferably 900 kg / m 3 or more, and further. It is preferably 915 kg / m 3 or more.
- the density of the second resin composition is, for example, 970 kg / m 3 or less, preferably 950 kg / m 3 or less, and more preferably 932 kg / m 3 or less.
- the density can be measured by, for example, an underwater substitution method.
- the density of polyethylene contained in the second resin composition is, for example, 900 kg / m 3 or more, preferably 925 kg / m 3 or more, and more preferably 945 kg / m 3 or more. That is all.
- the density of polyethylene contained in the second resin composition is, for example, 990 kg / m 3 or less, preferably 970 kg / m 3 or less, and more preferably 966 kg / m 3 or less.
- the content of the elastomer in the second resin composition is preferably 16% by mass or less, more preferably 14% by mass or less, and further preferably 10% by mass or less. It is more preferably 7% by mass or less, and particularly preferably 5% by mass or less.
- the lower limit value is preferably 0.5% by mass or more, more preferably 1% by mass or more, and further preferably 2% by mass or more.
- Table 1 the content in the resin composition forming the surface layer and the surface layer in Examples and Reference Examples is shown in mass%, respectively.
- the various parameters of HPP and HDPE in the surface layer and HPP, HDPE and LDPE in the subsurface layer are as follows.
- the nucleating agent the trade name ADEKA STAB M701 (manufactured by ADEKA Corporation, 5% by weight masterbatch (MB)) was used.
- ADEKA STAB M701 manufactured by ADEKA Corporation, 5% by weight masterbatch (MB)
- elastomer a trade name: Toughmer DF710 (manufactured by Mitsui Chemicals, Inc.), which is an ethylene- ⁇ -olefin copolymer having an MFR of 1.2 g / 10 min, was used.
- the laminated body is formed by laminating the surface layer, the subsurface layer, the base material layer, the adhesive layer, the oxygen barrier layer, the adhesive layer, the base material layer and the subsurface layer in this order, and the thickness of the entire laminated body is 0. It is .3 mm.
- the sealing strength shown in Table 1 above is such that a lid made of a film containing random polypropylene as a main component is sealed on a container body formed of a laminated body with a sealing time of 1.2 seconds, a sealing pressure of 0.24 MPa, and a seal.
- the seal strength (kgf) per width of 15 mm was measured at a tensile speed of 300 mm / min using a "digital force gauge" manufactured by Imada.
- the measured seal strength indicates the interlayer bonding strength between the surface layer and the subsurface layer.
- the edge sharpness and the feeling of opening were qualitatively evaluated by a sensory test.
- the edge breakability and opening feeling of the surface layer when the lid is peeled off are evaluated on a scale of 5 from A (very good) to E (bad). bottom. In this evaluation, A to D are acceptable ranges.
- the surface layer is formed of a resin composition containing polypropylene as a main component
- the lower surface layer is formed of a resin composition containing polypropylene and polyethylene.
- the resin composition of the surface layer contains 90% by mass of polypropylene (HPP), 7% by mass of polyethylene (HDPE), and further, a nucleating agent. Is contained in an amount of 3% by mass.
- the resin composition of the surface layer contains 95% by mass of polypropylene (HPP), 5% by mass of polyethylene (HDPE), and does not contain a nucleating agent.
- the resin composition of the surface layer contains 95% by mass of polypropylene (HPP), 5% by mass of polyethylene (HDPE), and does not contain a nucleating agent.
- the resin composition of the lower surface layer contains polypropylene (HPP) in an amount of 30% by mass to 45% by mass, and two types of polyethylene having different densities and melting points, specifically HDPE and LDPE. Is contained in the proportion as shown in the table. As a result, the density of the lower surface layer in Examples 1 to 5 becomes 920 kg / m 3 to 930 kg / m 3 .
- the lower surface layer is formed of a resin composition containing HPP and HDPE but not LDPE. As a result, the density of the lower surface layer in Examples 6 to 8 becomes 933 kg / m 3 to 940 kg / m 3 .
- the lower surface layer is formed of a resin composition containing HPP and HDPE but not LDPE, and an elastomer is further added.
- the content of the elastomer in the resin composition forming the lower surface layer is 3% by mass in Examples 9 to 11 and 15% by mass in Example 13.
- the resin composition under the surface contains 30% by mass of polypropylene (HPP), and two types of polyethylene having different densities and melting points from each other, specifically HDPE and LDPE, are contained in different proportions from Example 1.
- HPP polypropylene
- Comparative Example 1 is an example in which the surface layer is formed of 100% HPP and the lower surface layer is formed of a resin composition containing HPP and HDPE but not LDPE.
- the Ra value of the surface layer was 1.2 ⁇ m in each of Examples 1 to 8, which satisfied the condition of Ra ⁇ 0.5 ⁇ m, which is the range exemplified in the above description.
- the main component of the surface layer was HPP to improve the appearance after heating, and the peelability when the molded containers were overlapped with each other was also improved.
- the Ra value is 0.8 ⁇ m or 0.9 ⁇ m, which also satisfies the condition of Ra ⁇ 0.5 ⁇ m.
- Comparative Example 1 in which the surface layer was formed of 100% HPP the Ra value was 0.4 ⁇ m, which did not satisfy the condition of Ra ⁇ 0.5 ⁇ m, which is the range exemplified in the above description.
- the seal strength was 1.5 kgf or less in each of Examples 1 to 5, showing very good values, and Example 6
- the value was 4.0 kgf or less, showing a good value, and the edge cutting property was A to C, so that good opening property was obtained.
- the seal strength was 1.5 kgf or less, and the edge breakability was A or B, so that good openability was obtained.
- the seal strength was relatively high at 5.0 kgf, but the edge breakability was A, and the openability was good.
- Comparative Example 1 the sealing strength exceeded 6.0 kgf and the edge cutting property was D, so that the opening property was relatively low although it was within the allowable range.
- the feeling of opening was A or B in Examples 9 to 12, and the best results were obtained.
- the opening feelings of Examples 1 to 8 and Example 13 were C or D, but improvement was seen as compared with E of the opening feeling of Comparative Example 1, and the evaluation was within the permissible range.
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
- Wrappers (AREA)
Abstract
Provided is a laminate that at least comprises a surface layer which is formed from a first resin composition containing polyethylene and polypropylene, and a subsurface layer which is adjacent to the surface layer and which is formed from a second resin composition containing polyethylene and polypropylene, wherein the surface of the surface layer on the side opposite from the subsurface layer has an arithmetic mean roughness of not less than 0.5 μm.
Description
本発明は、積層体および容器に関する。
The present invention relates to a laminate and a container.
従来から、医薬品や医療品、化粧品、食品、飲料、工業部材、電子部品などの容器に積層体が使用されている。このような積層体では、耐衝撃性に優れた材料としてポリオレフィン樹脂が多く用いられている。特に食品や飲料などの容器では、加熱殺菌工程における熱処理の影響を受けにくい積層体が好適に用いられる。例えば特許文献1では、基材層およびシール層からなるシートにおいて、シール層にプロピレン由来の重合体成分を用いることで耐ブロッキング性、ヒートシール強度および耐衝撃性に優れ、かつ熱処理による外観不良を軽減する技術が記載されている。
Traditionally, laminates have been used in containers for pharmaceuticals, medical products, cosmetics, foods, beverages, industrial parts, electronic parts, etc. In such a laminate, a polyolefin resin is often used as a material having excellent impact resistance. In particular, for containers such as foods and beverages, a laminate that is not easily affected by the heat treatment in the heat sterilization step is preferably used. For example, in Patent Document 1, in a sheet composed of a base material layer and a seal layer, by using a polymer component derived from propylene for the seal layer, excellent blocking resistance, heat seal strength and impact resistance are obtained, and appearance defects due to heat treatment are deteriorated. Techniques for mitigation are described.
しかしながら、上記の特許文献1に記載された積層体は、層間の剥離性および剥離後の層のエッジ切れ性が低いため、例えば層間剥離を利用して開封を容易にした容器には用いられない。また、成形後の容器同士を重ね合わせたときの引き剥がし性については言及されていない。
However, the laminate described in Patent Document 1 is not used for a container whose opening is facilitated by using, for example, delamination because the delamination property between layers and the edge cutting property of the layer after delamination are low. .. Further, there is no mention of the peelability when the molded containers are overlapped with each other.
そこで、本発明は、成形後の容器の層間剥離による開封が容易であり、かつ成形後に重ね合わされた容器同士を引き剥がすことが容易な、積層体および容器を提供することを目的とする。
Therefore, an object of the present invention is to provide a laminated body and a container which can be easily opened by delamination of the container after molding and can easily peel off the stacked containers after molding.
[1]ポリプロピレン、およびポリエチレンを含有する第1の樹脂組成物で形成される表面層と、表面層に隣接し、ポリプロピレンおよびポリエチレンを含有する第2の樹脂組成物で形成される表面下層とを少なくとも含み、表面層の表面下層とは反対側の表面の算術平均粗さRaが0.5μm以上である積層体。
[2]第1の樹脂組成物は、ポリプロピレンを80質量%以上99質量%以下含有し、ポリエチレンを1質量%以上20質量%以下含有する、[1]に記載の積層体。
[3]第1の樹脂組成物に含有されるポリエチレンの融点が115℃以上140℃以下である、[1]または[2]に記載の積層体。
[4]第1の樹脂組成物に含有されるポリエチレンの密度が930kg/m3以上である、[1]から[3]のいずれか1項に記載の積層体。
[5]第1の樹脂組成物に含有されるポリプロピレンは、ホモポリプロピレンである、[1]から[4]のいずれか1項に記載の積層体。
[6]第1の樹脂組成物は、造核剤をさらに含有する、[1]から[5]のいずれか1項に記載の積層体。
[7]表面層の厚みは、5μm以上40μm以下である、[1]から[6]のいずれか1項に記載の積層体。
[8]第2の樹脂組成物は、ポリプロピレンを15質量%以上58質量%以下含有する、[1]から[7]のいずれか1項に記載の積層体。
[9]第2の樹脂組成物は、互いに融点が異なる少なくとも2種類のポリエチレンを含有する、[1]から[8]のいずれか1項に記載の積層体。
[10]第2の樹脂組成物は、互いに密度が異なる少なくとも2種類のポリエチレンを含有する、[1]から[9]のいずれか1項に記載の積層体。
[11]第2の樹脂組成物の密度が900kg/m3以上970kg/m3以下である、[1]から[10]のいずれか1項に記載の積層体。
[12]表面下層に対して表面層とは反対側に積層される第1および第2の基材層と、第1および第2の基材層の間に積層される酸素バリア層とをさらに含む、[1]から[11]のいずれか1項に記載の積層体。
[13]酸素バリア層は、エチレンビニルアルコール樹脂を含む、[12]に記載の積層体。
[14]厚みが0.2mm以上1.5mm以下である、[1]から[13]のいずれか1項に記載の積層体。
[15][1]から[14]のいずれか1項に記載の積層体が、表面層が内側になるように成形された容器。
[16]第2の樹脂組成物は、エラストマーを含有する、[1]から[14]のいずれか1項に記載の積層体。
[17]第2の樹脂組成物におけるエラストマーの含有量が0.5質量%以上、16質量%以下である、[16]に記載の積層体。
[18]第2の樹脂組成物に含有されるエラストマーのメルトフローレートが、0.5g/10分以上、5g/10分以下である、[16]または[17]に記載の積層体。
[19]第2の樹脂組成物に含有されるエラストマーは、エチレン-α-オレフィン共重合物を含む、[16]から[18]のいずれか1項に記載の積層体。
[20][16]から[19]のいずれか1項に記載の積層体が、表面層が内側になるように成形された容器。 [1] A surface layer formed of a first resin composition containing polypropylene and polyethylene, and a subsurface layer adjacent to the surface layer and formed of a second resin composition containing polypropylene and polyethylene. A laminate containing at least the surface layer and having an arithmetic average roughness Ra of the surface opposite to the surface layer of the surface layer of 0.5 μm or more.
[2] The laminate according to [1], wherein the first resin composition contains polypropylene in an amount of 80% by mass or more and 99% by mass or less, and polyethylene in an amount of 1% by mass or more and 20% by mass or less.
[3] The laminate according to [1] or [2], wherein the polyethylene contained in the first resin composition has a melting point of 115 ° C. or higher and 140 ° C. or lower.
[4] The laminate according to any one of [1] to [3], wherein the density of polyethylene contained in the first resin composition is 930 kg / m 3 or more.
[5] The laminate according to any one of [1] to [4], wherein the polypropylene contained in the first resin composition is homopolypropylene.
[6] The laminate according to any one of [1] to [5], wherein the first resin composition further contains a nucleating agent.
[7] The laminate according to any one of [1] to [6], wherein the surface layer has a thickness of 5 μm or more and 40 μm or less.
[8] The laminate according to any one of [1] to [7], wherein the second resin composition contains polypropylene in an amount of 15% by mass or more and 58% by mass or less.
[9] The laminate according to any one of [1] to [8], wherein the second resin composition contains at least two types of polyethylene having different melting points from each other.
[10] The laminate according to any one of [1] to [9], wherein the second resin composition contains at least two types of polyethylene having different densities from each other.
[11] The laminate according to any one of [1] to [10], wherein the density of the second resin composition is 900 kg / m 3 or more and 970 kg / m 3 or less.
[12] Further, a first and second base material layer laminated on the side opposite to the surface layer with respect to the lower surface layer, and an oxygen barrier layer laminated between the first and second base material layers. The laminate according to any one of [1] to [11], which comprises.
[13] The laminate according to [12], wherein the oxygen barrier layer contains an ethylene vinyl alcohol resin.
[14] The laminate according to any one of [1] to [13], which has a thickness of 0.2 mm or more and 1.5 mm or less.
[15] A container in which the laminate according to any one of [1] to [14] is formed so that the surface layer is on the inside.
[16] The laminate according to any one of [1] to [14], wherein the second resin composition contains an elastomer.
[17] The laminate according to [16], wherein the content of the elastomer in the second resin composition is 0.5% by mass or more and 16% by mass or less.
[18] The laminate according to [16] or [17], wherein the melt flow rate of the elastomer contained in the second resin composition is 0.5 g / 10 minutes or more and 5 g / 10 minutes or less.
[19] The laminate according to any one of [16] to [18], wherein the elastomer contained in the second resin composition contains an ethylene-α-olefin copolymer.
[20] A container in which the laminate according to any one of [16] to [19] is formed so that the surface layer is on the inside.
[2]第1の樹脂組成物は、ポリプロピレンを80質量%以上99質量%以下含有し、ポリエチレンを1質量%以上20質量%以下含有する、[1]に記載の積層体。
[3]第1の樹脂組成物に含有されるポリエチレンの融点が115℃以上140℃以下である、[1]または[2]に記載の積層体。
[4]第1の樹脂組成物に含有されるポリエチレンの密度が930kg/m3以上である、[1]から[3]のいずれか1項に記載の積層体。
[5]第1の樹脂組成物に含有されるポリプロピレンは、ホモポリプロピレンである、[1]から[4]のいずれか1項に記載の積層体。
[6]第1の樹脂組成物は、造核剤をさらに含有する、[1]から[5]のいずれか1項に記載の積層体。
[7]表面層の厚みは、5μm以上40μm以下である、[1]から[6]のいずれか1項に記載の積層体。
[8]第2の樹脂組成物は、ポリプロピレンを15質量%以上58質量%以下含有する、[1]から[7]のいずれか1項に記載の積層体。
[9]第2の樹脂組成物は、互いに融点が異なる少なくとも2種類のポリエチレンを含有する、[1]から[8]のいずれか1項に記載の積層体。
[10]第2の樹脂組成物は、互いに密度が異なる少なくとも2種類のポリエチレンを含有する、[1]から[9]のいずれか1項に記載の積層体。
[11]第2の樹脂組成物の密度が900kg/m3以上970kg/m3以下である、[1]から[10]のいずれか1項に記載の積層体。
[12]表面下層に対して表面層とは反対側に積層される第1および第2の基材層と、第1および第2の基材層の間に積層される酸素バリア層とをさらに含む、[1]から[11]のいずれか1項に記載の積層体。
[13]酸素バリア層は、エチレンビニルアルコール樹脂を含む、[12]に記載の積層体。
[14]厚みが0.2mm以上1.5mm以下である、[1]から[13]のいずれか1項に記載の積層体。
[15][1]から[14]のいずれか1項に記載の積層体が、表面層が内側になるように成形された容器。
[16]第2の樹脂組成物は、エラストマーを含有する、[1]から[14]のいずれか1項に記載の積層体。
[17]第2の樹脂組成物におけるエラストマーの含有量が0.5質量%以上、16質量%以下である、[16]に記載の積層体。
[18]第2の樹脂組成物に含有されるエラストマーのメルトフローレートが、0.5g/10分以上、5g/10分以下である、[16]または[17]に記載の積層体。
[19]第2の樹脂組成物に含有されるエラストマーは、エチレン-α-オレフィン共重合物を含む、[16]から[18]のいずれか1項に記載の積層体。
[20][16]から[19]のいずれか1項に記載の積層体が、表面層が内側になるように成形された容器。 [1] A surface layer formed of a first resin composition containing polypropylene and polyethylene, and a subsurface layer adjacent to the surface layer and formed of a second resin composition containing polypropylene and polyethylene. A laminate containing at least the surface layer and having an arithmetic average roughness Ra of the surface opposite to the surface layer of the surface layer of 0.5 μm or more.
[2] The laminate according to [1], wherein the first resin composition contains polypropylene in an amount of 80% by mass or more and 99% by mass or less, and polyethylene in an amount of 1% by mass or more and 20% by mass or less.
[3] The laminate according to [1] or [2], wherein the polyethylene contained in the first resin composition has a melting point of 115 ° C. or higher and 140 ° C. or lower.
[4] The laminate according to any one of [1] to [3], wherein the density of polyethylene contained in the first resin composition is 930 kg / m 3 or more.
[5] The laminate according to any one of [1] to [4], wherein the polypropylene contained in the first resin composition is homopolypropylene.
[6] The laminate according to any one of [1] to [5], wherein the first resin composition further contains a nucleating agent.
[7] The laminate according to any one of [1] to [6], wherein the surface layer has a thickness of 5 μm or more and 40 μm or less.
[8] The laminate according to any one of [1] to [7], wherein the second resin composition contains polypropylene in an amount of 15% by mass or more and 58% by mass or less.
[9] The laminate according to any one of [1] to [8], wherein the second resin composition contains at least two types of polyethylene having different melting points from each other.
[10] The laminate according to any one of [1] to [9], wherein the second resin composition contains at least two types of polyethylene having different densities from each other.
[11] The laminate according to any one of [1] to [10], wherein the density of the second resin composition is 900 kg / m 3 or more and 970 kg / m 3 or less.
[12] Further, a first and second base material layer laminated on the side opposite to the surface layer with respect to the lower surface layer, and an oxygen barrier layer laminated between the first and second base material layers. The laminate according to any one of [1] to [11], which comprises.
[13] The laminate according to [12], wherein the oxygen barrier layer contains an ethylene vinyl alcohol resin.
[14] The laminate according to any one of [1] to [13], which has a thickness of 0.2 mm or more and 1.5 mm or less.
[15] A container in which the laminate according to any one of [1] to [14] is formed so that the surface layer is on the inside.
[16] The laminate according to any one of [1] to [14], wherein the second resin composition contains an elastomer.
[17] The laminate according to [16], wherein the content of the elastomer in the second resin composition is 0.5% by mass or more and 16% by mass or less.
[18] The laminate according to [16] or [17], wherein the melt flow rate of the elastomer contained in the second resin composition is 0.5 g / 10 minutes or more and 5 g / 10 minutes or less.
[19] The laminate according to any one of [16] to [18], wherein the elastomer contained in the second resin composition contains an ethylene-α-olefin copolymer.
[20] A container in which the laminate according to any one of [16] to [19] is formed so that the surface layer is on the inside.
上記の構成によれば、表面層を形成する樹脂組成物がポリプロピレンを含有し、表面下層を形成する樹脂組成物がポリプロピレンおよびポリエチレンを含有することによって、表面層と表面下層との間が剥離しやすく、また表面層が接合領域の縁で破断しやすい。また、表面層の表面下層とは反対側の表面の算術平均粗さRaが0.5μm以上であることによって、成形後に重ね合わされた容器同士を引き剥がすことが容易になる。
According to the above configuration, the resin composition forming the surface layer contains polypropylene, and the resin composition forming the lower surface layer contains polypropylene and polyethylene, so that the surface layer and the lower surface layer are separated from each other. It is easy and the surface layer is easy to break at the edge of the joint region. Further, when the arithmetic average roughness Ra of the surface opposite to the lower surface layer of the surface layer is 0.5 μm or more, it becomes easy to peel off the stacked containers after molding.
以下に添付図面を参照しながら、本発明の好適な実施形態について詳細に説明する。なお、本明細書および図面において、実質的に同一の機能構成を有する構成要素については、同一の符号を付することにより重複説明を省略する。
A preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings below. In the present specification and the drawings, components having substantially the same functional configuration are designated by the same reference numerals, so that duplicate description will be omitted.
なお、本明細書において、積層体の各層を形成する樹脂組成物の主成分は、その層を形成している樹脂組成物の中で最も含有率が多い樹脂成分を意味する。従って、樹脂組成物は主成分に加えて他の成分を含んでもよい。主成分は、例えばIR法によって確認することができる。本明細書において、積層体の各層を形成する樹脂組成物の成分の含有率は、別途記載がない限りその層を形成する樹脂組成物全体に対する質量%で表記する。
In the present specification, the main component of the resin composition forming each layer of the laminate means the resin component having the highest content in the resin composition forming the layer. Therefore, the resin composition may contain other components in addition to the main component. The main component can be confirmed by, for example, the IR method. In the present specification, the content of the components of the resin composition forming each layer of the laminate is expressed in mass% with respect to the entire resin composition forming the layer, unless otherwise specified.
(第1の実施形態)
図1は、本発明の第1の実施形態に係る積層体の構造を示す模式的な断面図である。図1に示されるように、積層体10は、表面層11と、表面下層12,15と、基材層13,14とを有する。以下、各層の構成について説明する。なお、積層体10は、後述するような容器を構成するのに適した厚み、具体的には例えば0.01mm以上、1.8mm以下、好ましくは0.1mm以上、1.6mm以下、より好ましくは0.2mm以上、1.5mm以下、さらに好ましくは0.25mm以上、1.4mm以下、特に好ましくは0.3mm以上、1.2mm以下の厚みで形成されるが、この例には限定されない。 (First Embodiment)
FIG. 1 is a schematic cross-sectional view showing the structure of the laminated body according to the first embodiment of the present invention. As shown in FIG. 1, thelaminate 10 has a surface layer 11, subsurface layers 12, 15 and base layers 13, 14. Hereinafter, the configuration of each layer will be described. The laminate 10 has a thickness suitable for forming a container as described later, specifically, for example, 0.01 mm or more and 1.8 mm or less, preferably 0.1 mm or more and 1.6 mm or less, more preferably. Is formed with a thickness of 0.2 mm or more and 1.5 mm or less, more preferably 0.25 mm or more and 1.4 mm or less, particularly preferably 0.3 mm or more and 1.2 mm or less, but is not limited to this example. ..
図1は、本発明の第1の実施形態に係る積層体の構造を示す模式的な断面図である。図1に示されるように、積層体10は、表面層11と、表面下層12,15と、基材層13,14とを有する。以下、各層の構成について説明する。なお、積層体10は、後述するような容器を構成するのに適した厚み、具体的には例えば0.01mm以上、1.8mm以下、好ましくは0.1mm以上、1.6mm以下、より好ましくは0.2mm以上、1.5mm以下、さらに好ましくは0.25mm以上、1.4mm以下、特に好ましくは0.3mm以上、1.2mm以下の厚みで形成されるが、この例には限定されない。 (First Embodiment)
FIG. 1 is a schematic cross-sectional view showing the structure of the laminated body according to the first embodiment of the present invention. As shown in FIG. 1, the
表面層11は、積層体10が後述する容器に成形されたときに、ヒートシールなどによって蓋体に接合される層である。具体的には、表面層11は、ポリプロピレンを主成分とする樹脂組成物で形成される。表面層11を形成する樹脂組成物(以下、第1の樹脂組成物ともいう)は、加熱後の外観を改善する観点からはホモポリプロピレン(HPP)を含有することが好ましいが、HPP以外にも、ランダムポリプロピレン(RPP)またはブロックポリプロピレン(BPP)などのポリプロピレン、高密度ポリエチレン(HDPE)や中密度ポリエチレン(MDPE)などのポリエチレン、または直鎖状エチレン-α-オレフィン共重合体などを含んでもよい。また、第1の樹脂組成物は、造核剤を含有してもよい。造核剤の具体例としては、有機カルボン酸もしくはその金属塩、芳香族スルホン酸塩もしくはその金属塩、有機リン酸化合物もしくはその金属塩、ジベンジリデンソルビトールもしくはその誘導体、ロジン酸部分金属塩、無機微粒子、イミド類、アミド類、キナクリドン類、キノン類又はこれらの混合物が挙げられる。
The surface layer 11 is a layer that is joined to the lid body by a heat seal or the like when the laminated body 10 is formed into a container described later. Specifically, the surface layer 11 is formed of a resin composition containing polypropylene as a main component. The resin composition forming the surface layer 11 (hereinafter, also referred to as the first resin composition) preferably contains homopolypropylene (HPP) from the viewpoint of improving the appearance after heating, but other than HPP, it is preferable. , Polypropylene such as random polypropylene (RPP) or block polypropylene (BPP), polyethylene such as high density polyethylene (HDPE) or medium density polyethylene (MDPE), or linear ethylene-α-olefin copolymers and the like may be included. .. Further, the first resin composition may contain a nucleating agent. Specific examples of the nucleating agent include organic carboxylic acid or a metal salt thereof, aromatic sulfonate or a metal salt thereof, an organic phosphoric acid compound or a metal salt thereof, dibenzylidene sorbitol or a derivative thereof, a partial metal salt of loginic acid, and an inorganic substance. Examples thereof include fine particles, imides, amides, quinacridones, quinones or mixtures thereof.
有機カルボン酸の金属塩としては、安息香酸アルミニウム塩、p-t-ブチル安息香酸アルミニウム塩、アジピン酸ナトリウム、チオフェネカルボン酸ナトリウム、ピローレカルボン酸ナトリウム等が挙げられる。
ジベンジリデンソルビトール又はその誘導体としては、ジベンジリデンソルビトール、1,3:2,4-ビス(o-3,4-ジメチルベンジリデン)ソルビトール、1,3:2,4-ビス(o-2,4-ジメチルベンジリデン)ソルビトール、1,3:2,4-ビス(o-4-エチルベンジリデン)ソルビトール、1,3:2,4-ビス(o-4-クロロベンジリデン)ソルビトール、1,3:2,4-ジベンジリデンソルビトール等が挙げられる。また、具体的には、新日本理化株式会社製の「ゲルオールMD」や「ゲルオールMD-R」(商品名)等も挙げられる。
ロジン酸部分金属塩としては、荒川化学工業株式会社製の「パインクリスタルKM1600」、「パインクリスタルKM1500」、「パインクリスタルKM1300」(商品名)等が挙げられる。 Examples of the metal salt of the organic carboxylic acid include aluminum benzoate, pt-butyl aluminum benzoate, sodium adipate, sodium thiophenecarboxylate, sodium pyrolecarboxylate and the like.
Examples of dibenzylidene sorbitol or a derivative thereof include dibenzylidene sorbitol, 1,3: 2,4-bis (o-3,4-dimethylbenzylidene) sorbitol, and 1,3: 2,4-bis (o-2,4-). Dimethylbenzylidene) sorbitol, 1,3: 2,4-bis (o-4-ethylbenzylidene) sorbitol, 1,3: 2,4-bis (o-4-chlorobenzylidene) sorbitol, 1,3: 2,4 -Givenzylidene sorbitol and the like can be mentioned. Specific examples thereof include "Gelall MD" and "Gelall MD-R" (trade name) manufactured by Shin Nihon Rika Co., Ltd.
Examples of the rosin acid partial metal salt include "Pine Crystal KM1600", "Pine Crystal KM1500" and "Pine Crystal KM1300" (trade name) manufactured by Arakawa Chemical Industry Co., Ltd.
ジベンジリデンソルビトール又はその誘導体としては、ジベンジリデンソルビトール、1,3:2,4-ビス(o-3,4-ジメチルベンジリデン)ソルビトール、1,3:2,4-ビス(o-2,4-ジメチルベンジリデン)ソルビトール、1,3:2,4-ビス(o-4-エチルベンジリデン)ソルビトール、1,3:2,4-ビス(o-4-クロロベンジリデン)ソルビトール、1,3:2,4-ジベンジリデンソルビトール等が挙げられる。また、具体的には、新日本理化株式会社製の「ゲルオールMD」や「ゲルオールMD-R」(商品名)等も挙げられる。
ロジン酸部分金属塩としては、荒川化学工業株式会社製の「パインクリスタルKM1600」、「パインクリスタルKM1500」、「パインクリスタルKM1300」(商品名)等が挙げられる。 Examples of the metal salt of the organic carboxylic acid include aluminum benzoate, pt-butyl aluminum benzoate, sodium adipate, sodium thiophenecarboxylate, sodium pyrolecarboxylate and the like.
Examples of dibenzylidene sorbitol or a derivative thereof include dibenzylidene sorbitol, 1,3: 2,4-bis (o-3,4-dimethylbenzylidene) sorbitol, and 1,3: 2,4-bis (o-2,4-). Dimethylbenzylidene) sorbitol, 1,3: 2,4-bis (o-4-ethylbenzylidene) sorbitol, 1,3: 2,4-bis (o-4-chlorobenzylidene) sorbitol, 1,3: 2,4 -Givenzylidene sorbitol and the like can be mentioned. Specific examples thereof include "Gelall MD" and "Gelall MD-R" (trade name) manufactured by Shin Nihon Rika Co., Ltd.
Examples of the rosin acid partial metal salt include "Pine Crystal KM1600", "Pine Crystal KM1500" and "Pine Crystal KM1300" (trade name) manufactured by Arakawa Chemical Industry Co., Ltd.
無機微粒子としては、タルク、クレー、マイカ、アスベスト、ガラス繊維、ガラスフレーク、ガラスビーズ、ケイ酸カルシウム、モンモリロナイト、ベントナイト、グラファィト、アルミニウム粉末、アルミナ、シリカ、ケイ藻土、酸化チタン、酸化マグネシウム、軽石粉末、軽石バルーン、水酸化アルミニウム、水酸化マグネシウム、塩基性炭酸マグネシウム、ドロマイト、硫酸カルシウム、チタン酸カリウム、硫酸バリウム、亜硫酸カルシウム、硫化モリブデン等が挙げられる。
アミド化合物としては、アジピン酸ジアニリド、スペリン酸ジアニリド等が挙げられる。
上記造核剤の中でも、結晶化速度上昇の効果が高い観点から下記一般式で示される有機リン酸金属塩(リン酸エステル金属塩)を用いることが好ましい。
有機リン酸金属塩の具体例としては、「アデカスタブNA-11」、「アデカスタブNA-21」、「アデカスタブNA-71」、「アデカスタブM701」「アデカスタブM801」(いずれも、旭電化株式会社製)が挙げられる。 Inorganic fine particles include talc, clay, mica, asbestos, glass fiber, glass flakes, glass beads, calcium silicate, montmorillonite, bentonite, graphite, aluminum powder, alumina, silica, diatomaceous soil, titanium oxide, magnesium oxide, pebbles. Examples thereof include powder, light stone balloon, aluminum hydroxide, magnesium hydroxide, basic magnesium carbonate, dolomite, calcium sulfate, potassium titanate, barium sulfate, calcium sulfite, molybdenum sulfide and the like.
Examples of the amide compound include adipic acid dianilide and sperin acid dianilide.
Among the above nucleating agents, it is preferable to use an organic phosphate metal salt (phosphate ester metal salt) represented by the following general formula from the viewpoint of high effect of increasing the crystallization rate.
Specific examples of the organophosphate metal salt include "Adecastab NA-11", "Adecastab NA-21", "Adecastab NA-71", "Adecastab M701" and "Adecastab M801" (all manufactured by Asahi Denka Co., Ltd.). Can be mentioned.
アミド化合物としては、アジピン酸ジアニリド、スペリン酸ジアニリド等が挙げられる。
上記造核剤の中でも、結晶化速度上昇の効果が高い観点から下記一般式で示される有機リン酸金属塩(リン酸エステル金属塩)を用いることが好ましい。
有機リン酸金属塩の具体例としては、「アデカスタブNA-11」、「アデカスタブNA-21」、「アデカスタブNA-71」、「アデカスタブM701」「アデカスタブM801」(いずれも、旭電化株式会社製)が挙げられる。 Inorganic fine particles include talc, clay, mica, asbestos, glass fiber, glass flakes, glass beads, calcium silicate, montmorillonite, bentonite, graphite, aluminum powder, alumina, silica, diatomaceous soil, titanium oxide, magnesium oxide, pebbles. Examples thereof include powder, light stone balloon, aluminum hydroxide, magnesium hydroxide, basic magnesium carbonate, dolomite, calcium sulfate, potassium titanate, barium sulfate, calcium sulfite, molybdenum sulfide and the like.
Examples of the amide compound include adipic acid dianilide and sperin acid dianilide.
Among the above nucleating agents, it is preferable to use an organic phosphate metal salt (phosphate ester metal salt) represented by the following general formula from the viewpoint of high effect of increasing the crystallization rate.
Specific examples of the organophosphate metal salt include "Adecastab NA-11", "Adecastab NA-21", "Adecastab NA-71", "Adecastab M701" and "Adecastab M801" (all manufactured by Asahi Denka Co., Ltd.). Can be mentioned.
造核剤の含有量は、例えば500ppm以上であり、好ましくは800ppm以上であり、より好ましくは1250ppm以上であり、特に好ましくは1400ppm以上である。また、造核剤の含有量は、好ましくは10000ppm以下であり、より好ましくは5000ppm以下であり、さらに好ましくは3000ppm以下である。造核剤を含有することによって、表面層11のエッジ切れ性、すなわち開封時における破断しやすさが向上する。限定的でない例として、容器の開封時に表面層11が破断される場合、表面層11の厚みを5μm以上40μm以下とすることが好ましく、10μm以上30μm以下にすることがより好ましい。
The content of the nucleating agent is, for example, 500 ppm or more, preferably 800 ppm or more, more preferably 1250 ppm or more, and particularly preferably 1400 ppm or more. The content of the nucleating agent is preferably 10000 ppm or less, more preferably 5000 ppm or less, and further preferably 3000 ppm or less. By containing the nucleating agent, the edge cutting property of the surface layer 11, that is, the easiness of breaking at the time of opening is improved. As a non-limiting example, when the surface layer 11 is broken when the container is opened, the thickness of the surface layer 11 is preferably 5 μm or more and 40 μm or less, and more preferably 10 μm or more and 30 μm or less.
加えて、本実施形態において、表面層11の表面下層12とは反対側の表面の算術平均粗さRaは0.5μm以上である。これによって、成形後の容器の表面に適度な粗さが与えられ、容器同士を重ね合わせたときの引き剥がし性を向上させることができる。ここで、算術平均粗さRaについてはJIS B0601に規定されている。算術平均粗さRaは、好ましくは0.6μm以上であり、より好ましくは0.7μm以上であり、さらに好ましくは0.8μm以上、特に好ましくは1.0μm以上である。算術平均粗さRaの上限は特に限定されないが、通常は3.0μm以下である。
In addition, in the present embodiment, the arithmetic average roughness Ra of the surface of the surface layer 11 opposite to the surface lower layer 12 is 0.5 μm or more. As a result, the surface of the container after molding is given an appropriate roughness, and the peelability when the containers are overlapped with each other can be improved. Here, the arithmetic mean roughness Ra is defined in JIS B0601. The arithmetic average roughness Ra is preferably 0.6 μm or more, more preferably 0.7 μm or more, still more preferably 0.8 μm or more, and particularly preferably 1.0 μm or more. The upper limit of the arithmetic mean roughness Ra is not particularly limited, but is usually 3.0 μm or less.
上記のような算術平均粗さRaを実現するために、例えば、表面層11を形成する第1の樹脂組成物がポリエチレンを含有してもよい。この場合において、第1の樹脂組成物は、ポリプロピレンを80質量%以上99質量%以下含有し、ポリエチレンを1質量%以上20質量%以下含有してもよい。第1の樹脂組成物に含有されるポリエチレンの融点は、例えば115℃以上であり、好ましくは120℃以上であり、より好ましくは125℃以上である。また、第1の樹脂組成物に含有されるポリエチレンの融点は、例えば135℃以下であり、好ましくは140℃以下である。ポリエチレンを複数種類含有している場合は、いずれか一種のポリエチレンがこの範囲となればよい。第1の樹脂組成物に含有されるポリエチレンの融点をこの範囲とすることで、上記のような算術平均粗さRaを実現することができる。
In order to realize the arithmetic mean roughness Ra as described above, for example, the first resin composition forming the surface layer 11 may contain polyethylene. In this case, the first resin composition may contain polypropylene in an amount of 80% by mass or more and 99% by mass or less, and polyethylene may be contained in an amount of 1% by mass or more and 20% by mass or less. The melting point of polyethylene contained in the first resin composition is, for example, 115 ° C. or higher, preferably 120 ° C. or higher, and more preferably 125 ° C. or higher. The melting point of polyethylene contained in the first resin composition is, for example, 135 ° C. or lower, preferably 140 ° C. or lower. When a plurality of types of polyethylene are contained, any one type of polyethylene may be in this range. By setting the melting point of polyethylene contained in the first resin composition within this range, the arithmetic average roughness Ra as described above can be realized.
本発明においてポリエチレンの融点は、示差走査熱量測定器(DSC)(株式会社パーキンエルマージャパン製「Diamond DSC」)を用いて、温度範囲50℃~220℃、昇温速度10℃/分の条件にて測定し、吸熱ピークが頂上となる位置の温度を融点とする。
In the present invention, the melting point of polyethylene is set to a temperature range of 50 ° C. to 220 ° C. and a heating rate of 10 ° C./min using a differential scanning calorimetry device (DSC) (“Diamond DSC” manufactured by PerkinElmer Japan Co., Ltd.). The melting point is the temperature at the position where the heat absorption peak is at the top.
また、上記のような算術平均粗さRaを実現するために、さらに、表面層11を形成する第1の樹脂組成物に含有されるポリエチレンの密度は、例えば900kg/m3以上であり、好ましくは925kg/m3以上であり、より好ましくは945kg/m3以上である。表面層11を形成する第1の樹脂組成物に含有されるポリエチレンの密度は、例えば990kg/m3以下であり、好ましくは970kg/m3以下であり、より好ましくは966kg/m3以下である。
Further, in order to realize the arithmetic mean roughness Ra as described above, the density of polyethylene contained in the first resin composition forming the surface layer 11 is, for example, 900 kg / m 3 or more, which is preferable. Is 925 kg / m 3 or more, more preferably 945 kg / m 3 or more. The density of polyethylene contained in the first resin composition forming the surface layer 11 is, for example, 990 kg / m 3 or less, preferably 970 kg / m 3 or less, and more preferably 966 kg / m 3 or less. ..
表面下層12は表面層11に隣接し、ポリプロピレンおよびポリエチレンを含有する樹脂組成物で形成される。表面層11の主成分がポリプロピレンである場合、表面下層12がポリプロピレンおよびポリエチレンを含有することによって、表面層11と表面下層12との間を剥離し易くすることができる。例えば、表面下層12を形成する樹脂組成物(以下、第2の樹脂組成物ともいう)は、ポリプロピレンを15質量%以上58質量%以下含有してもよい。
The lower surface layer 12 is adjacent to the surface layer 11 and is formed of a resin composition containing polypropylene and polyethylene. When the main component of the surface layer 11 is polypropylene, the surface layer 12 contains polypropylene and polyethylene, so that the surface layer 11 and the surface layer 12 can be easily separated from each other. For example, the resin composition forming the surface lower layer 12 (hereinafter, also referred to as a second resin composition) may contain polypropylene in an amount of 15% by mass or more and 58% by mass or less.
第2の樹脂組成物は、互いに融点が異なる少なくとも2種類のポリエチレンを含有してもよい。第2の樹脂組成物に含有される1種類目のポリエチレンの融点は、例えば115℃以上であり、好ましくは120℃以上であり、より好ましくは125℃以上である。また、1種類目の第2樹脂組成物に含有されるポリエチレンの融点は、例えば140℃以下であり、好ましくは135℃以下である。第2の樹脂組成物に含有される2種類目のポリエチレンの融点は、例えば80℃以上であり、好ましくは90℃以上であり、より好ましくは100℃以上である。また、2類目の第2の樹脂組成物に含有されるポリエチレンの融点は、例えば130℃以下であり、好ましくは120℃以下であり、より好ましくは115℃以下である。ポリプロピレンの含有量およびポリエチレンの種類および融点の設定によって、表面層11と表面下層12との間で適切な層間接合強度が得られ、表面層11の剥離を容易にしつつ、表面層11のエッジ切れ性を改善することができる。表面下層15は、基材層13,14を挟んで表面層11および表面下層12とは反対側に位置し、表面下層12と同様の樹脂組成物で形成される。
The second resin composition may contain at least two types of polyethylene having different melting points from each other. The melting point of the first type of polyethylene contained in the second resin composition is, for example, 115 ° C. or higher, preferably 120 ° C. or higher, and more preferably 125 ° C. or higher. The melting point of polyethylene contained in the first type of second resin composition is, for example, 140 ° C. or lower, preferably 135 ° C. or lower. The melting point of the second type of polyethylene contained in the second resin composition is, for example, 80 ° C. or higher, preferably 90 ° C. or higher, and more preferably 100 ° C. or higher. The melting point of polyethylene contained in the second resin composition of the second category is, for example, 130 ° C. or lower, preferably 120 ° C. or lower, and more preferably 115 ° C. or lower. Depending on the polypropylene content and the polyethylene type and melting point settings, an appropriate interlayer bonding strength between the surface layer 11 and the surface layer 12 can be obtained, facilitating the peeling of the surface layer 11 and cutting the edges of the surface layer 11. The sex can be improved. The lower surface layer 15 is located on the side opposite to the surface layer 11 and the lower surface layer 12 with the base material layers 13 and 14 interposed therebetween, and is formed of the same resin composition as the lower surface layer 12.
さらに第2の樹脂組成物の密度は、例えば850kg/m3以上であり、好ましくは880kg/m3以上であり、より好ましくは900kg/m3以上でありさらに好ましくは915kg/m3以上である。また、第2の樹脂組成物の密度は、例えば970kg/m3以下であり、好ましくは950kg/m3以下であり、より好ましくは932kg/m3以下である。密度は、例えば水中置換法により測定することができる。
Further, the density of the second resin composition is, for example, 850 kg / m 3 or more, preferably 880 kg / m 3 or more, more preferably 900 kg / m 3 or more, and further preferably 915 kg / m 3 or more. .. The density of the second resin composition is, for example, 970 kg / m 3 or less, preferably 950 kg / m 3 or less, and more preferably 932 kg / m 3 or less. The density can be measured by, for example, an underwater substitution method.
またさらに第2の樹脂組成物は、互いに密度が異なる少なくとも2種類のポリエチレンを含有してもよい。第2の樹脂組成物に含有される1種類目のポリエチレンの密度は、例えば900kg/m3以上であり、好ましくは925kg/m3以上であり、より好ましくは945kg/m3以上である。また、第2の樹脂組成物に含有される1種類目のポリエチレンの密度は、例えば990kg/m3以下であり、好ましくは970kg/m3以下であり、より好ましくは966kg/m3以下である。第2の樹脂組成物に含有される2種類目のポリエチレンの密度は、例えば880kg/m3以上であり、好ましくは903kg/m3以上、さらに好ましくは910kg/m3以上である。また、第2の樹脂組成物に含有される2種類目のポリエチレンの密度は、例えば950kg/m3以下であり、好ましくは945kg/m3以下であり、より好ましくは930kg/m3以下である。
Further, the second resin composition may contain at least two kinds of polyethylene having different densities from each other. The density of the first type of polyethylene contained in the second resin composition is, for example, 900 kg / m 3 or more, preferably 925 kg / m 3 or more, and more preferably 945 kg / m 3 or more. The density of the first type of polyethylene contained in the second resin composition is, for example, 990 kg / m 3 or less, preferably 970 kg / m 3 or less, and more preferably 966 kg / m 3 or less. .. The density of the second type of polyethylene contained in the second resin composition is, for example, 880 kg / m 3 or more, preferably 903 kg / m 3 or more, and more preferably 910 kg / m 3 or more. The density of the second type of polyethylene contained in the second resin composition is, for example, 950 kg / m 3 or less, preferably 945 kg / m 3 or less, and more preferably 930 kg / m 3 or less. ..
上記の例において、第2の樹脂組成物に含まれる相対的に密度が高いポリエチレンの含有量は、20質量%以上が好ましく、25質量%以上がより好ましく、30質量%以上がさらに好ましい。また、85質量%以下が好ましく、80質量%以下がより好ましく、75質量%以下がさらに好ましい。また、第2の樹脂組成物に含まれると相対的に密度が低いポリエチレンの含有量は、1質量%以上が好ましく、2質量%以上がより好ましく、3質量%以上がさらに好ましい。また、45質量%以下が好ましく、40質量%以下がより好ましく、35質量%以下がさらに好ましい。
In the above example, the content of polyethylene having a relatively high density contained in the second resin composition is preferably 20% by mass or more, more preferably 25% by mass or more, still more preferably 30% by mass or more. Further, 85% by mass or less is preferable, 80% by mass or less is more preferable, and 75% by mass or less is further preferable. Further, the content of polyethylene having a relatively low density when contained in the second resin composition is preferably 1% by mass or more, more preferably 2% by mass or more, still more preferably 3% by mass or more. Further, 45% by mass or less is preferable, 40% by mass or less is more preferable, and 35% by mass or less is further preferable.
このようなポリプロピレンの含有量およびポリエチレンの種類密度及び含有量の設定によって、表面層11と表面下層12との間で適切な層間接合強度が得られ、表面層11の剥離を容易にしつつ、表面層11のエッジ切れ性を改善することができる。
By setting the polypropylene content and the polyethylene type density and content, an appropriate interlayer bonding strength can be obtained between the surface layer 11 and the surface layer 12, and the surface layer 11 can be easily peeled off from the surface. The edge breakability of the layer 11 can be improved.
第2の樹脂組成物に含有される少なくとも2種類のポリエチレンの融点、密度を上記の範囲内とすることにより、表面層11と表面下層12との間でより適切な層間接合強度が得られることで、表面層11の剥離を容易にしつつ、表面層11のエッジ切れ性をよりよく改善することができる。
By setting the melting point and density of at least two types of polyethylene contained in the second resin composition within the above ranges, a more appropriate interlayer bonding strength can be obtained between the surface layer 11 and the surface layer 12. Therefore, the edge cutting property of the surface layer 11 can be better improved while facilitating the peeling of the surface layer 11.
基材層13,14は、表面下層12に対して表面層11とは反対側に積層され、例えばオレフィン系樹脂、ポリスチレン系樹脂、およびポリエステル系樹脂からなる群の少なくともいずれかを含む樹脂で形成される。オレフィン系樹脂としては、ポリプロピレン、およびポリエチレンが例示される。ポリエステル系樹脂としては、ポリエチレンテレフタレート(PET)が例示される。基材層13,14には、剛性を向上させるためにタルクなどの無機フィラーが添加されてもよい。基材層13,14の間に、エチレン-ビニルアルコール共重合体(EVOH)などのエチレンビニルアルコール樹脂を含む酸素バリア層が追加されてもよい。
The base material layers 13 and 14 are laminated on the side opposite to the surface layer 11 with respect to the lower surface layer 12, and are formed of a resin containing at least one of the group consisting of, for example, an olefin resin, a polystyrene resin, and a polyester resin. Will be done. Examples of the olefin resin include polypropylene and polyethylene. Examples of the polyester resin include polyethylene terephthalate (PET). Inorganic fillers such as talc may be added to the base material layers 13 and 14 in order to improve the rigidity. An oxygen barrier layer containing an ethylene vinyl alcohol resin such as an ethylene-vinyl alcohol copolymer (EVOH) may be added between the substrate layers 13 and 14.
なお、以上で説明した積層体10において、表面層11および表面下層12以外の層構成は任意であり、例えば必要とされる剛性やバリア性に応じて追加の層が含まれてもよく、またいずれかの層が省略されてもよい。
In the laminated body 10 described above, the layer structure other than the surface layer 11 and the surface layer 12 is arbitrary, and an additional layer may be included depending on the required rigidity and barrier property, for example. Either layer may be omitted.
図2は、図1に示される積層体が成形された容器の例を示す断面図である。図2に示された容器100は、積層体10を成形した容器本体と、容器本体に接合される蓋体20とを含む。図示された例では、容器本体が底面部101、側面部102およびフランジ部103を含む形状に成形され、蓋体20がフランジ部103に形成される接合領域105で例えばヒートシールなどによって容器本体に接合されている。この例において、容器本体は、積層体10の表面層11が内側になるように成形されている。これによって、容器本体を形成する積層体10では表面層11が収納空間SP側になり、接合領域105では蓋体20と積層体10の表面層11とが接合される。
FIG. 2 is a cross-sectional view showing an example of a container in which the laminate shown in FIG. 1 is molded. The container 100 shown in FIG. 2 includes a container body formed by molding the laminated body 10 and a lid body 20 joined to the container body. In the illustrated example, the container body is formed into a shape including the bottom surface portion 101, the side surface portion 102, and the flange portion 103, and the lid 20 is formed on the flange portion 103 in the joint region 105, for example, by heat sealing or the like on the container body. It is joined. In this example, the container body is molded so that the surface layer 11 of the laminated body 10 is on the inside. As a result, in the laminated body 10 forming the container body, the surface layer 11 is on the storage space SP side, and in the joining region 105, the lid 20 and the surface layer 11 of the laminated body 10 are joined.
上記のような容器100を成形後に積み重ねた場合、上記のように表面層11の表面に適度な粗さが与えられていることから、積み重ねた容器同士を引き剥がすことが容易である。なお、表面層11の表面が過度に平滑である場合は、容器同士の間の通気性が低く、吸着力が大きくなるために引き剥がしが困難になる場合がある。
When the containers 100 as described above are stacked after molding, the surface of the surface layer 11 is given an appropriate roughness as described above, so that the stacked containers can be easily peeled off from each other. If the surface of the surface layer 11 is excessively smooth, the air permeability between the containers is low and the adsorption force is large, which may make it difficult to peel off.
また、上述の通り、積層体10の表面層11の主成分がポリプロピレンであり、表面下層12がポリプロピレンおよびポリエチレンを含有するため、表面層11と表面下層12との間は剥離しやすい。これを利用して、容器100では、容器本体を構成する積層体10の表面層11と表面下層12との間の層間接合強度を、接合領域105における蓋体20と表面層11との間の接合強度、および表面下層12と基材層13との間の層間接合強度よりも弱くすることができる。これによって、ユーザーが蓋体20の端部を摘持して引き剥がしたときに、接合領域105では表面層11が蓋体20とともに引き剥がされ、表面層11と表面下層12との間が層間剥離する。蓋体20および表面層11が接合領域105の内側の縁まで引き剥がされると、そこで表面層11が破断し(エッジ切れ)、以降は蓋体20のみが容器本体から引き剥がされる。
Further, as described above, since the main component of the surface layer 11 of the laminate 10 is polypropylene and the surface layer 12 contains polypropylene and polyethylene, the surface layer 11 and the surface layer 12 are easily peeled off. Utilizing this, in the container 100, the interlayer bonding strength between the surface layer 11 and the surface layer 12 of the laminate 10 constituting the container body is set between the lid 20 and the surface layer 11 in the bonding region 105. It can be weaker than the bond strength and the interlayer bond strength between the surface layer 12 and the substrate layer 13. As a result, when the user grips and peels off the end portion of the lid 20, the surface layer 11 is peeled off together with the lid 20 in the joint region 105, and the layer between the surface layer 11 and the surface layer 12 is interposed. Peel off. When the lid 20 and the surface layer 11 are peeled off to the inner edge of the joint region 105, the surface layer 11 breaks (edge breakage), and thereafter only the lid 20 is peeled off from the container body.
(第2の実施形態)
次に、本発明の第2の実施形態について説明する。本実施形態では、上記の第1の実施形態と同様に構成される積層体10において、表面下層12を形成する樹脂組成物(第2の樹脂組成物)が、ポリプロピレンと、1種類以上のポリエチレンと、エラストマーとを含有する。これ以外の点について、本実施形態の構成は上記の第1の実施形態と同様であるため重複した詳細な説明は省略する。 (Second embodiment)
Next, a second embodiment of the present invention will be described. In the present embodiment, in the laminate 10 configured in the same manner as in the first embodiment, the resin composition (second resin composition) forming the surfacelower layer 12 is polypropylene and one or more types of polyethylene. And an elastomer. Since the configuration of the present embodiment is the same as that of the first embodiment described above with respect to other points, a duplicate detailed description will be omitted.
次に、本発明の第2の実施形態について説明する。本実施形態では、上記の第1の実施形態と同様に構成される積層体10において、表面下層12を形成する樹脂組成物(第2の樹脂組成物)が、ポリプロピレンと、1種類以上のポリエチレンと、エラストマーとを含有する。これ以外の点について、本実施形態の構成は上記の第1の実施形態と同様であるため重複した詳細な説明は省略する。 (Second embodiment)
Next, a second embodiment of the present invention will be described. In the present embodiment, in the laminate 10 configured in the same manner as in the first embodiment, the resin composition (second resin composition) forming the surface
第2の実施形態において、第2の樹脂組成物に含有されるポリエチレンの融点は、例えば115℃以上であり、好ましくは120℃以上であり、より好ましくは125℃以上である。また、第2の樹脂組成物に含有されるポリエチレンの融点は、例えば140℃以下であり、好ましくは135℃以下である。第2の樹脂組成物に含有されるエラストマーは特に限定はないが、エチレン-α-オレフィン共重合物であることが好ましい。エラストマーのメルトフローレート(MFR)は、0.5g/10分以上であることが好ましく、5.0g/10分以下であることが好ましい。エラストマーのMFRは、0.8g/10分以上であることがより好ましく、1.0g/10分以上であることがさらに好ましい。また、エラストマーのMFRは、4g/10分以下であることがより好ましく、3.5g/10分以下であることがさらに好ましく、2g/10分以下であることが特に好ましい。
In the second embodiment, the melting point of polyethylene contained in the second resin composition is, for example, 115 ° C. or higher, preferably 120 ° C. or higher, and more preferably 125 ° C. or higher. The melting point of polyethylene contained in the second resin composition is, for example, 140 ° C. or lower, preferably 135 ° C. or lower. The elastomer contained in the second resin composition is not particularly limited, but is preferably an ethylene-α-olefin copolymer. The melt flow rate (MFR) of the elastomer is preferably 0.5 g / 10 minutes or more, and preferably 5.0 g / 10 minutes or less. The MFR of the elastomer is more preferably 0.8 g / 10 minutes or more, and further preferably 1.0 g / 10 minutes or more. The MFR of the elastomer is more preferably 4 g / 10 minutes or less, further preferably 3.5 g / 10 minutes or less, and particularly preferably 2 g / 10 minutes or less.
表面下層12を形成される第2の樹脂組成物におけるポリエチレンおよびポリプロピレンの含有量、ポリエチレンの融点、ならびに所定量のエラストマーを含有させることによって、表面層11と表面下層12との間で適切な層間接合強度が得られ、表面層11の剥離を容易にしつつ、表面層11のエッジ切れ性を改善することができ、さらに外観をよりよくすることができる。なお、表面下層15についても、表面下層12と同様の第2の樹脂組成物で形成される。
Appropriate layers between the surface layer 11 and the surface layer 12 by containing the content of polyethylene and polypropylene in the second resin composition forming the surface layer 12, the melting point of polyethylene, and a predetermined amount of elastomer. Bonding strength can be obtained, the edge cutting property of the surface layer 11 can be improved while facilitating the peeling of the surface layer 11, and the appearance can be further improved. The lower surface layer 15 is also formed of the same second resin composition as the lower surface layer 12.
さらに、第2の実施形態において、第2の樹脂組成物の密度は、例えば850kg/m3以上であり、好ましくは880kg/m3以上であり、より好ましくは900kg/m3以上であり、さらに好ましくは915kg/m3以上である。また、第2の樹脂組成物の密度は、例えば970kg/m3以下であり、好ましくは950kg/m3以下であり、より好ましくは932kg/m3以下である。密度は、例えば水中置換法により測定することができる。
Further, in the second embodiment, the density of the second resin composition is, for example, 850 kg / m 3 or more, preferably 880 kg / m 3 or more, more preferably 900 kg / m 3 or more, and further. It is preferably 915 kg / m 3 or more. The density of the second resin composition is, for example, 970 kg / m 3 or less, preferably 950 kg / m 3 or less, and more preferably 932 kg / m 3 or less. The density can be measured by, for example, an underwater substitution method.
またさらに、第2の実施形態において第2の樹脂組成物に含有されるポリエチレンの密度は、例えば900kg/m3以上であり、好ましくは925kg/m3以上であり、より好ましくは945kg/m3以上である。また、第2の樹脂組成物に含有されるポリエチレンの密度は、例えば990kg/m3以下であり、好ましくは970kg/m3以下であり、より好ましくは966kg/m3以下である。
Furthermore, in the second embodiment, the density of polyethylene contained in the second resin composition is, for example, 900 kg / m 3 or more, preferably 925 kg / m 3 or more, and more preferably 945 kg / m 3 or more. That is all. The density of polyethylene contained in the second resin composition is, for example, 990 kg / m 3 or less, preferably 970 kg / m 3 or less, and more preferably 966 kg / m 3 or less.
第2の実施形態において、第2の樹脂組成物におけるエラストマーの含有量は、16質量%以下であることが好ましく、14質量%以下であることがより好ましく、10質量%以下であることがさらに好ましく、7質量%以下であることがさらにより好ましく、5質量%以下であることが特に好ましい。下限値は0.5質量%以上であることがこのましく、1質量%以上であることがより好ましく、2質量%以上であることがさらに好ましい。
In the second embodiment, the content of the elastomer in the second resin composition is preferably 16% by mass or less, more preferably 14% by mass or less, and further preferably 10% by mass or less. It is more preferably 7% by mass or less, and particularly preferably 5% by mass or less. The lower limit value is preferably 0.5% by mass or more, more preferably 1% by mass or more, and further preferably 2% by mass or more.
次に、本発明の実施例について説明する。表1では、実施例および参考例で表面層および表面下層を形成する樹脂組成物における含有率が、それぞれ質量%で示されている。表面層のHPP、およびHDPE、ならびに表面下層のHPP、HDPEおよびLDPEの各種パラメータは以下の通りである。造核剤は、商品名アデカスタブM701(株式会社ADEKA製、5重量%マスターバッチ(MB))を用いた。エラストマーとして、MFRが1.2g/10分のエチレン-α-オレフィン共重合物である商品名:タフマーDF710(三井化学社製)を用いた。なお、積層体は、表面層、表面下層、基材層、接着層、酸素バリア層、接着層、基材層および表面下層がこの順で積層されたものであり、積層体全体の厚みは0.3mmである。
Next, examples of the present invention will be described. In Table 1, the content in the resin composition forming the surface layer and the surface layer in Examples and Reference Examples is shown in mass%, respectively. The various parameters of HPP and HDPE in the surface layer and HPP, HDPE and LDPE in the subsurface layer are as follows. As the nucleating agent, the trade name ADEKA STAB M701 (manufactured by ADEKA Corporation, 5% by weight masterbatch (MB)) was used. As the elastomer, a trade name: Toughmer DF710 (manufactured by Mitsui Chemicals, Inc.), which is an ethylene-α-olefin copolymer having an MFR of 1.2 g / 10 min, was used. The laminated body is formed by laminating the surface layer, the subsurface layer, the base material layer, the adhesive layer, the oxygen barrier layer, the adhesive layer, the base material layer and the subsurface layer in this order, and the thickness of the entire laminated body is 0. It is .3 mm.
表面層
HPP(メルトフローレート:16g/10分、密度:900kg/m3、引張弾性率:1,600MPa)
HDPE(メルトフローレート:0.35g/10分、融点:130℃、密度:956kg/m3)
表面下層
HPP(メルトフローレート:0.5g/10分、密度890kg/m3~920kg/m3、アイソタクチックペンダッド分率:93mol%)
HDPE(メルトフローレート:0.5g/10分、融点:133℃、密度:956kg/m3)
LDPE(実施例1~実施例8および実施例12ではメルトフローレート:0.35g/10分、融点:109℃、密度:920kg/m3) Surface layer HPP (melt flow rate: 16 g / 10 minutes, density: 900 kg / m 3 , tensile modulus: 1,600 MPa)
HDPE (melt flow rate: 0.35 g / 10 minutes, melting point: 130 ° C., density: 956 kg / m 3 )
Under-surface HPP (melt flow rate: 0.5 g / 10 minutes, density 890 kg / m 3 to 920 kg / m 3 , isotactic pendad fraction: 93 mol%)
HDPE (melt flow rate: 0.5 g / 10 minutes, melting point: 133 ° C., density: 956 kg / m 3 )
LDPE (melt flow rate: 0.35 g / 10 minutes, melting point: 109 ° C., density: 920 kg / m 3 in Examples 1 to 8 and Example 12)
HPP(メルトフローレート:16g/10分、密度:900kg/m3、引張弾性率:1,600MPa)
HDPE(メルトフローレート:0.35g/10分、融点:130℃、密度:956kg/m3)
表面下層
HPP(メルトフローレート:0.5g/10分、密度890kg/m3~920kg/m3、アイソタクチックペンダッド分率:93mol%)
HDPE(メルトフローレート:0.5g/10分、融点:133℃、密度:956kg/m3)
LDPE(実施例1~実施例8および実施例12ではメルトフローレート:0.35g/10分、融点:109℃、密度:920kg/m3) Surface layer HPP (melt flow rate: 16 g / 10 minutes, density: 900 kg / m 3 , tensile modulus: 1,600 MPa)
HDPE (melt flow rate: 0.35 g / 10 minutes, melting point: 130 ° C., density: 956 kg / m 3 )
Under-surface HPP (melt flow rate: 0.5 g / 10 minutes, density 890 kg / m 3 to 920 kg / m 3 , isotactic pendad fraction: 93 mol%)
HDPE (melt flow rate: 0.5 g / 10 minutes, melting point: 133 ° C., density: 956 kg / m 3 )
LDPE (melt flow rate: 0.35 g / 10 minutes, melting point: 109 ° C., density: 920 kg / m 3 in Examples 1 to 8 and Example 12)
算術平均粗さ(Ra値)の測定
株式会社東京精密製「ハンディサーフE-35B」を使用し、JIS B0601-1994に準拠して、下記のような測定条件で、表面層の表面下層とは反対側の表面の算術平均粗さ(Ra値)を測定した。
<測定条件>
・測定距離:4mm
・カットオフ:0.8mm
・触針:先端直径5μm、先端角度90°円錐、材質ダイヤモンド
・測定力:4mN以下 Arithmetic average roughness (Ra value) measurement Using "Handy Surf E-35B" manufactured by Tokyo Precision Co., Ltd., in accordance with JIS B0601-1994, under the following measurement conditions, what is the surface layer of the surface layer? The arithmetic average roughness (Ra value) of the opposite surface was measured.
<Measurement conditions>
・ Measurement distance: 4 mm
・ Cutoff: 0.8mm
・ Needle: Tip diameter 5 μm, tip angle 90 ° cone, material diamond ・ Measuring force: 4 mN or less
株式会社東京精密製「ハンディサーフE-35B」を使用し、JIS B0601-1994に準拠して、下記のような測定条件で、表面層の表面下層とは反対側の表面の算術平均粗さ(Ra値)を測定した。
<測定条件>
・測定距離:4mm
・カットオフ:0.8mm
・触針:先端直径5μm、先端角度90°円錐、材質ダイヤモンド
・測定力:4mN以下 Arithmetic average roughness (Ra value) measurement Using "Handy Surf E-35B" manufactured by Tokyo Precision Co., Ltd., in accordance with JIS B0601-1994, under the following measurement conditions, what is the surface layer of the surface layer? The arithmetic average roughness (Ra value) of the opposite surface was measured.
<Measurement conditions>
・ Measurement distance: 4 mm
・ Cutoff: 0.8mm
・ Needle: Tip diameter 5 μm, tip angle 90 ° cone, material diamond ・ Measuring force: 4 mN or less
上記の表1に示されたシール強度は、積層体を成形した容器本体に、ランダムポリプロピレンを主成分とするフィルムで形成された蓋体をシール時間1.2秒、シール圧力0.24MPa、シール温度200℃にて接合したものについて、イマダ社製「デジタルフォースゲージ」を用いて、引張速度300mm/分で幅15mm当たりのシール強度(kgf)を測定した。このとき、容器本体では表面層と表面下層との間が層間剥離するため、測定されたシール強度は表面層と表面下層との間の層間接合強度を示す。エッジ切れ性および開封感については官能検査によって定性的に評価した。具体的には、上記のように蓋体を接合した容器について、蓋体を引き剥がしたときの表面層のエッジ切れ性および開封感をA(とても良い)からE(悪い)の5段階で評価した。この評価ではA~Dが許容範囲である。
The sealing strength shown in Table 1 above is such that a lid made of a film containing random polypropylene as a main component is sealed on a container body formed of a laminated body with a sealing time of 1.2 seconds, a sealing pressure of 0.24 MPa, and a seal. For those joined at a temperature of 200 ° C., the seal strength (kgf) per width of 15 mm was measured at a tensile speed of 300 mm / min using a "digital force gauge" manufactured by Imada. At this time, since the surface layer and the subsurface layer are delaminated in the container body, the measured seal strength indicates the interlayer bonding strength between the surface layer and the subsurface layer. The edge sharpness and the feeling of opening were qualitatively evaluated by a sensory test. Specifically, for the container to which the lid is joined as described above, the edge breakability and opening feeling of the surface layer when the lid is peeled off are evaluated on a scale of 5 from A (very good) to E (bad). bottom. In this evaluation, A to D are acceptable ranges.
実施例では、表面層がポリプロピレンを主成分とする樹脂組成物で形成され、表面下層がポリプロピレンおよびポリエチレンを含有する樹脂組成物で形成される。具体的には、実施例1~実施例4および実施例6では表面層の樹脂組成物がポリプロピレン(HPP)を90質量%含有し、ポリエチレン(HDPE)を7質量%含有し、さらに造核剤を3質量%含有する。実施例5、実施例7および実施例8では、表面層の樹脂組成物がポリプロピレン(HPP)を95質量%含有し、ポリエチレン(HDPE)を5質量%含有し、造核剤を含有しない。実施例9~実施例13でも、表面層の樹脂組成物がポリプロピレン(HPP)を95質量%含有し、ポリエチレン(HDPE)を5質量%含有し、造核剤を含有しない。
In the embodiment, the surface layer is formed of a resin composition containing polypropylene as a main component, and the lower surface layer is formed of a resin composition containing polypropylene and polyethylene. Specifically, in Examples 1 to 4 and Example 6, the resin composition of the surface layer contains 90% by mass of polypropylene (HPP), 7% by mass of polyethylene (HDPE), and further, a nucleating agent. Is contained in an amount of 3% by mass. In Examples 5, 7 and 8, the resin composition of the surface layer contains 95% by mass of polypropylene (HPP), 5% by mass of polyethylene (HDPE), and does not contain a nucleating agent. Also in Examples 9 to 13, the resin composition of the surface layer contains 95% by mass of polypropylene (HPP), 5% by mass of polyethylene (HDPE), and does not contain a nucleating agent.
一方、実施例1~5では、表面下層の樹脂組成物がポリプロピレン(HPP)を30質量%~45質量%含有するとともに、互いに密度および融点が異なる2種類のポリエチレン、具体的にはHDPEおよびLDPEを表に示されたような割合で含有する。この結果、実施例1~実施例5における表面下層の密度は920kg/m3~930kg/m3になる。これに対して、実施例6~実施例8では表面下層がHPPおよびHDPEを含有しLDPEを含有しない樹脂組成物で形成される。この結果、実施例6~実施例8における表面下層の密度は933kg/m3~940kg/m3になる。実施例9~実施例11および実施例13では表面下層がHPPおよびHDPEを含有しLDPEを含有しない樹脂組成物で形成され、さらにエラストマーが添加される。表面下層を形成する樹脂組成物におけるエラストマーの含有量は、実施例9~実施例11では3質量%、実施例13では15質量%である。実施例12では、表面下層の樹脂組成物がポリプロピレン(HPP)を30質量%含有するとともに、互いに密度および融点が異なる2種類のポリエチレン、具体的にはHDPEおよびLDPEを実施例1とは異なる割合で含有する。比較例1は、表面層をHPP100%で形成し、表面下層をHPPおよびHDPEを含有しLDPEを含有しない樹脂組成物で形成した例である。
On the other hand, in Examples 1 to 5, the resin composition of the lower surface layer contains polypropylene (HPP) in an amount of 30% by mass to 45% by mass, and two types of polyethylene having different densities and melting points, specifically HDPE and LDPE. Is contained in the proportion as shown in the table. As a result, the density of the lower surface layer in Examples 1 to 5 becomes 920 kg / m 3 to 930 kg / m 3 . On the other hand, in Examples 6 to 8, the lower surface layer is formed of a resin composition containing HPP and HDPE but not LDPE. As a result, the density of the lower surface layer in Examples 6 to 8 becomes 933 kg / m 3 to 940 kg / m 3 . In Examples 9 to 11 and 13, the lower surface layer is formed of a resin composition containing HPP and HDPE but not LDPE, and an elastomer is further added. The content of the elastomer in the resin composition forming the lower surface layer is 3% by mass in Examples 9 to 11 and 15% by mass in Example 13. In Example 12, the resin composition under the surface contains 30% by mass of polypropylene (HPP), and two types of polyethylene having different densities and melting points from each other, specifically HDPE and LDPE, are contained in different proportions from Example 1. Contains in. Comparative Example 1 is an example in which the surface layer is formed of 100% HPP and the lower surface layer is formed of a resin composition containing HPP and HDPE but not LDPE.
まず、表面層のRa値については、実施例1~実施例8でいずれも1.2μmであり、上記の説明で例示された範囲であるRa≧0.5μmの条件を満たしていた。なお、上記の実施例では表面層の主成分をHPPにして加熱後の外観を改善するとともに、成形後の容器同士を重ね合わせたときの引き剥がし性についても改善が見られることが示されている。実施例9~実施例13ではRa値が0.8μmまたは0.9μmであり、これもRa≧0.5μmの条件を満たす。表面層がHPP100%で形成される比較例1ではRa値が0.4μmであり、上記の説明で例示された範囲であるRa≧0.5μmの条件を満たさなかった。
First, the Ra value of the surface layer was 1.2 μm in each of Examples 1 to 8, which satisfied the condition of Ra ≧ 0.5 μm, which is the range exemplified in the above description. In the above embodiment, it was shown that the main component of the surface layer was HPP to improve the appearance after heating, and the peelability when the molded containers were overlapped with each other was also improved. There is. In Examples 9 to 13, the Ra value is 0.8 μm or 0.9 μm, which also satisfies the condition of Ra ≧ 0.5 μm. In Comparative Example 1 in which the surface layer was formed of 100% HPP, the Ra value was 0.4 μm, which did not satisfy the condition of Ra ≧ 0.5 μm, which is the range exemplified in the above description.
次に、表面層と表面下層との間のシール強度およびエッジ切れ性評価については、実施例1~実施例5のそれぞれでシール強度が1.5kgf以下となりとても良好な値を示し、実施例6~実施例8では4.0kgf以下となり良好な値を示し、またエッジ切れ性がA~Cであったことで良好な開封性が得られた。実施例9~実施例12でもシール強度が1.5kgf以下となり、エッジ切れ性がAまたはBであったことで良好な開封性が得られた。実施例13は、シール強度は5.0kgfと比較的高いがエッジ切れ性はAであり、開封性は良好であった。その一方で、比較例1ではシール強度が6.0kgfを超えており、エッジ切れ性もDであったため、許容範囲内ではあるものの開封性は相対的に低かった。開封感については、実施例9~実施例12でAまたはBであり、最も良好な結果が得られた。実施例1~実施例8および実施例13の開封感はCまたはDであったが、比較例1の開封感のEに比べて改善が見られ、また評価としても許容範囲内であった。
Next, regarding the evaluation of the seal strength and the edge breakability between the surface layer and the subsurface layer, the seal strength was 1.5 kgf or less in each of Examples 1 to 5, showing very good values, and Example 6 In Example 8, the value was 4.0 kgf or less, showing a good value, and the edge cutting property was A to C, so that good opening property was obtained. Also in Examples 9 to 12, the seal strength was 1.5 kgf or less, and the edge breakability was A or B, so that good openability was obtained. In Example 13, the seal strength was relatively high at 5.0 kgf, but the edge breakability was A, and the openability was good. On the other hand, in Comparative Example 1, the sealing strength exceeded 6.0 kgf and the edge cutting property was D, so that the opening property was relatively low although it was within the allowable range. The feeling of opening was A or B in Examples 9 to 12, and the best results were obtained. The opening feelings of Examples 1 to 8 and Example 13 were C or D, but improvement was seen as compared with E of the opening feeling of Comparative Example 1, and the evaluation was within the permissible range.
以上、添付図面を参照しながら本発明の好適な実施形態について詳細に説明したが、本発明はこれらの例に限定されない。本発明の属する技術の分野の当業者であれば、請求の範囲に記載された技術的思想の範疇内において、各種の変更例または修正例に想到し得ることは明らかであり、これらについても、当然に本発明の技術的範囲に属するものと了解される。
Although the preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, the present invention is not limited to these examples. It is clear that a person skilled in the art to which the present invention belongs can come up with various modifications or modifications within the scope of the technical ideas described in the claims. Naturally, it is understood that it belongs to the technical scope of the present invention.
10…積層体、11…表面層、12…表面下層、13…基材層、14…基材層、15…表面下層、20…蓋体、100…容器、101…底面部、102…側面部、103…フランジ部、SP…収納空間。
10 ... Laminated body, 11 ... Surface layer, 12 ... Subsurface layer, 13 ... Base layer, 14 ... Base layer, 15 ... Subsurface layer, 20 ... Lid, 100 ... Container, 101 ... Bottom, 102 ... Side , 103 ... Flange, SP ... Storage space.
Claims (20)
- ポリプロピレン、およびポリエチレンを含有する第1の樹脂組成物で形成される表面層と、
前記表面層に隣接し、ポリプロピレンおよびポリエチレンを含有する第2の樹脂組成物で形成される表面下層と
を少なくとも含み、
前記表面層の前記表面下層とは反対側の表面の算術平均粗さRaが0.5μm以上である積層体。 A surface layer formed of a first resin composition containing polypropylene and polyethylene,
Containing at least a subsurface layer adjacent to the surface layer and formed of a second resin composition containing polypropylene and polyethylene.
A laminate having an arithmetic average roughness Ra of the surface opposite to the surface layer of the surface layer of the surface layer of 0.5 μm or more. - 前記第1の樹脂組成物は、ポリプロピレンを80質量%以上99質量%以下含有し、ポリエチレンを1質量%以上20質量%以下含有する、請求項1に記載の積層体。 The laminate according to claim 1, wherein the first resin composition contains polypropylene in an amount of 80% by mass or more and 99% by mass or less, and polyethylene in an amount of 1% by mass or more and 20% by mass or less.
- 前記第1の樹脂組成物に含有されるポリエチレンの融点が115℃以上140℃以下である、請求項1または請求項2に記載の積層体。 The laminate according to claim 1 or 2, wherein the polyethylene contained in the first resin composition has a melting point of 115 ° C. or higher and 140 ° C. or lower.
- 前記第1の樹脂組成物に含有されるポリエチレンの密度が930kg/m3以上である、請求項1から請求項3のいずれか1項に記載の積層体。 The laminate according to any one of claims 1 to 3, wherein the density of polyethylene contained in the first resin composition is 930 kg / m 3 or more.
- 前記第1の樹脂組成物に含有されるポリプロピレンは、ホモポリプロピレンである、請求項1から請求項4のいずれか1項に記載の積層体。 The laminate according to any one of claims 1 to 4, wherein the polypropylene contained in the first resin composition is homopolypropylene.
- 前記第1の樹脂組成物は、造核剤をさらに含有する、請求項1から請求項5のいずれか1項に記載の積層体。 The laminate according to any one of claims 1 to 5, wherein the first resin composition further contains a nucleating agent.
- 前記表面層の厚みは、5μm以上40μm以下である、請求項1から請求項6のいずれか1項に記載の積層体。 The laminate according to any one of claims 1 to 6, wherein the surface layer has a thickness of 5 μm or more and 40 μm or less.
- 前記第2の樹脂組成物は、ポリプロピレンを15質量%以上58質量%以下含有する、請求項1から請求項7のいずれか1項に記載の積層体。 The laminate according to any one of claims 1 to 7, wherein the second resin composition contains polypropylene in an amount of 15% by mass or more and 58% by mass or less.
- 前記第2の樹脂組成物は、互いに融点が異なる少なくとも2種類のポリエチレンを含有する、請求項1から請求項8のいずれか1項に記載の積層体。 The laminate according to any one of claims 1 to 8, wherein the second resin composition contains at least two types of polyethylene having different melting points from each other.
- 前記第2の樹脂組成物は、互いに密度が異なる少なくとも2種類のポリエチレンを含有する、請求項1から請求項9のいずれか1項に記載の積層体。 The laminate according to any one of claims 1 to 9, wherein the second resin composition contains at least two types of polyethylene having different densities from each other.
- 前記第2の樹脂組成物の密度が900kg/m3以上970kg/m3以下である、請求項1から請求項10のいずれか1項に記載の積層体。 The laminate according to any one of claims 1 to 10, wherein the density of the second resin composition is 900 kg / m 3 or more and 970 kg / m 3 or less.
- 前記表面下層に対して前記表面層とは反対側に積層される第1および第2の基材層と、前記第1および第2の基材層の間に積層される酸素バリア層とをさらに含む、請求項1から請求項11のいずれか1項に記載の積層体。 Further, a first and second base material layer laminated on the side opposite to the surface layer with respect to the lower surface layer, and an oxygen barrier layer laminated between the first and second base material layers. The laminate according to any one of claims 1 to 11, which includes.
- 前記酸素バリア層は、エチレンビニルアルコール樹脂を含む、請求項12に記載の積層体。 The laminate according to claim 12, wherein the oxygen barrier layer contains an ethylene vinyl alcohol resin.
- 厚みが0.2mm以上1.5mm以下である、請求項1から請求項13のいずれか1項に記載の積層体。 The laminate according to any one of claims 1 to 13, wherein the thickness is 0.2 mm or more and 1.5 mm or less.
- 請求項1から請求項14のいずれか1項に記載の積層体が、前記表面層が内側になるように成形された容器。 A container in which the laminate according to any one of claims 1 to 14 is formed so that the surface layer is on the inside.
- 前記第2の樹脂組成物は、エラストマーを含有する、請求項1から請求項14のいずれか1項に記載の積層体。 The laminate according to any one of claims 1 to 14, wherein the second resin composition contains an elastomer.
- 前記第2の樹脂組成物におけるエラストマーの含有量が0.5質量%以上、16質量%以下である、請求項16に記載の積層体。 The laminate according to claim 16, wherein the content of the elastomer in the second resin composition is 0.5% by mass or more and 16% by mass or less.
- 前記第2の樹脂組成物に含有されるエラストマーのメルトフローレートが、0.5g/10分以上、5g/10分以下である、請求項16または17に記載の積層体。 The laminate according to claim 16 or 17, wherein the melt flow rate of the elastomer contained in the second resin composition is 0.5 g / 10 minutes or more and 5 g / 10 minutes or less.
- 前記第2の樹脂組成物に含有されるエラストマーは、エチレン-α-オレフィン共重合物を含む、請求項16から請求項18のいずれか1項に記載の積層体。 The laminate according to any one of claims 16 to 18, wherein the elastomer contained in the second resin composition contains an ethylene-α-olefin copolymer.
- 請求項16から請求項19のいずれか1項に記載の積層体が、前記表面層が内側になるように成形された容器。 A container in which the laminate according to any one of claims 16 to 19 is formed so that the surface layer is on the inside.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2020-185906 | 2020-11-06 | ||
JP2020185906 | 2020-11-06 | ||
JP2021009466A JP2022075447A (en) | 2020-11-06 | 2021-01-25 | Laminate and container |
JP2021-009466 | 2021-01-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022097658A1 true WO2022097658A1 (en) | 2022-05-12 |
Family
ID=81457038
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2021/040482 WO2022097658A1 (en) | 2020-11-06 | 2021-11-04 | Laminate and container |
Country Status (2)
Country | Link |
---|---|
TW (1) | TW202233422A (en) |
WO (1) | WO2022097658A1 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006341593A (en) * | 2005-05-06 | 2006-12-21 | Eastman Chem Co | Pressure-sensitive adhesive (psa) laminate |
WO2008026733A1 (en) * | 2006-08-31 | 2008-03-06 | Zeon Corporation | Hydrogenated norbornene-based ring-opening polymerization polymers, resin composition, and molded objects |
WO2015194645A1 (en) * | 2014-06-18 | 2015-12-23 | 共同印刷株式会社 | Absorbent layer for blister packs, laminate comprising same, and blister pack using said laminate |
-
2021
- 2021-11-04 WO PCT/JP2021/040482 patent/WO2022097658A1/en active Application Filing
- 2021-11-04 TW TW110141123A patent/TW202233422A/en unknown
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006341593A (en) * | 2005-05-06 | 2006-12-21 | Eastman Chem Co | Pressure-sensitive adhesive (psa) laminate |
WO2008026733A1 (en) * | 2006-08-31 | 2008-03-06 | Zeon Corporation | Hydrogenated norbornene-based ring-opening polymerization polymers, resin composition, and molded objects |
WO2015194645A1 (en) * | 2014-06-18 | 2015-12-23 | 共同印刷株式会社 | Absorbent layer for blister packs, laminate comprising same, and blister pack using said laminate |
Also Published As
Publication number | Publication date |
---|---|
TW202233422A (en) | 2022-09-01 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US20130129949A1 (en) | Coextruded Film And Bag Using The Same | |
US20240076110A1 (en) | Recyclable film for thermoforming | |
JP2008179410A (en) | Package vessel | |
JP6413913B2 (en) | Cover film for top seal | |
JP2018070191A (en) | Lid material film for top seal and package | |
WO2022097658A1 (en) | Laminate and container | |
WO2017135375A1 (en) | Resealable packaging container | |
JPH0212816B2 (en) | ||
JP2022075447A (en) | Laminate and container | |
JP2017121707A (en) | Multilayer film | |
JP2019156484A (en) | Easily peelable film | |
JP7227671B1 (en) | Laminated sheet and compact | |
JP5363785B2 (en) | Multi-layer sheet, thermoformed container and easy-open packaging | |
JP2018127556A (en) | Resin composition, lid material for easily-openable container, and easily-openable container | |
JP2019214152A (en) | Multilayer sheet, tray and package | |
JP2013202980A (en) | Lid material | |
JP7006329B2 (en) | Thermoplastic resin composition, easy-to-open container lid material and easy-to-open container | |
JP5256984B2 (en) | Coextrusion multilayer film | |
JP2020164178A (en) | Packaging material and package | |
JP7255265B2 (en) | Laminated film for deep drawing, bottom material for deep drawing packaging, and deep drawing packaging | |
JP7306098B2 (en) | Laminated films and packaging materials | |
JP2009083164A (en) | Multilayer laminated film having easy peelability | |
WO2023021852A1 (en) | Gas barrier laminate and container | |
JP2023051891A (en) | Resin composition, sheet, laminate sheet, and container | |
JP2021091219A (en) | Laminate sheet and container |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 21889211 Country of ref document: EP Kind code of ref document: A1 |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 21889211 Country of ref document: EP Kind code of ref document: A1 |