CN117730449A - Packaging material for battery and method for producing same - Google Patents
Packaging material for battery and method for producing same Download PDFInfo
- Publication number
- CN117730449A CN117730449A CN202280051121.1A CN202280051121A CN117730449A CN 117730449 A CN117730449 A CN 117730449A CN 202280051121 A CN202280051121 A CN 202280051121A CN 117730449 A CN117730449 A CN 117730449A
- Authority
- CN
- China
- Prior art keywords
- layer
- lubricant
- resin
- packaging material
- heat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000005022 packaging material Substances 0.000 title claims abstract description 97
- 238000004519 manufacturing process Methods 0.000 title claims description 17
- 239000000314 lubricant Substances 0.000 claims abstract description 285
- 229920005989 resin Polymers 0.000 claims abstract description 127
- 239000011347 resin Substances 0.000 claims abstract description 127
- 230000004888 barrier function Effects 0.000 claims abstract description 34
- 239000010410 layer Substances 0.000 claims description 394
- 239000000463 material Substances 0.000 claims description 92
- 239000011241 protective layer Substances 0.000 claims description 69
- 239000000758 substrate Substances 0.000 claims description 31
- FTQWRYSLUYAIRQ-UHFFFAOYSA-N n-[(octadecanoylamino)methyl]octadecanamide Chemical group CCCCCCCCCCCCCCCCCC(=O)NCNC(=O)CCCCCCCCCCCCCCCCC FTQWRYSLUYAIRQ-UHFFFAOYSA-N 0.000 claims description 26
- 239000010419 fine particle Substances 0.000 claims description 20
- 238000010030 laminating Methods 0.000 claims description 18
- 239000007787 solid Substances 0.000 claims description 18
- 239000011342 resin composition Substances 0.000 claims description 12
- 229920000178 Acrylic resin Polymers 0.000 claims description 7
- 239000004925 Acrylic resin Substances 0.000 claims description 7
- 239000013034 phenoxy resin Substances 0.000 claims description 6
- 229920006287 phenoxy resin Polymers 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 5
- 239000003822 epoxy resin Substances 0.000 claims description 5
- 229920000647 polyepoxide Polymers 0.000 claims description 5
- 229920002803 thermoplastic polyurethane Polymers 0.000 claims description 5
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 4
- 239000011737 fluorine Substances 0.000 claims description 4
- 229910052731 fluorine Inorganic materials 0.000 claims description 4
- 229920005672 polyolefin resin Polymers 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 description 37
- 230000001070 adhesive effect Effects 0.000 description 32
- 239000000853 adhesive Substances 0.000 description 31
- 239000012790 adhesive layer Substances 0.000 description 29
- 238000000034 method Methods 0.000 description 26
- -1 ethylene bisdecanoate amide Chemical class 0.000 description 25
- 239000007788 liquid Substances 0.000 description 16
- 239000003795 chemical substances by application Substances 0.000 description 15
- 238000002844 melting Methods 0.000 description 15
- 230000008018 melting Effects 0.000 description 15
- 239000002390 adhesive tape Substances 0.000 description 14
- 230000000694 effects Effects 0.000 description 14
- 239000002245 particle Substances 0.000 description 13
- 150000004670 unsaturated fatty acids Chemical class 0.000 description 11
- 235000021122 unsaturated fatty acids Nutrition 0.000 description 11
- 239000011888 foil Substances 0.000 description 10
- 239000012948 isocyanate Substances 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 9
- 150000004671 saturated fatty acids Chemical class 0.000 description 9
- 239000000126 substance Substances 0.000 description 9
- 239000005057 Hexamethylene diisocyanate Substances 0.000 description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 8
- 239000011248 coating agent Substances 0.000 description 8
- 238000000576 coating method Methods 0.000 description 8
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 description 8
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 description 8
- 238000000465 moulding Methods 0.000 description 7
- 229920005862 polyol Polymers 0.000 description 7
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 6
- UAUDZVJPLUQNMU-KTKRTIGZSA-N erucamide Chemical compound CCCCCCCC\C=C/CCCCCCCCCCCC(N)=O UAUDZVJPLUQNMU-KTKRTIGZSA-N 0.000 description 6
- 239000002904 solvent Substances 0.000 description 6
- ORAWFNKFUWGRJG-UHFFFAOYSA-N Docosanamide Chemical compound CCCCCCCCCCCCCCCCCCCCCC(N)=O ORAWFNKFUWGRJG-UHFFFAOYSA-N 0.000 description 5
- UAUDZVJPLUQNMU-UHFFFAOYSA-N Erucasaeureamid Natural products CCCCCCCCC=CCCCCCCCCCCCC(N)=O UAUDZVJPLUQNMU-UHFFFAOYSA-N 0.000 description 5
- 125000003118 aryl group Chemical group 0.000 description 5
- 238000003475 lamination Methods 0.000 description 5
- 229920006284 nylon film Polymers 0.000 description 5
- OXDXXMDEEFOVHR-CLFAGFIQSA-N (z)-n-[2-[[(z)-octadec-9-enoyl]amino]ethyl]octadec-9-enamide Chemical compound CCCCCCCC\C=C/CCCCCCCC(=O)NCCNC(=O)CCCCCCC\C=C/CCCCCCCC OXDXXMDEEFOVHR-CLFAGFIQSA-N 0.000 description 4
- 239000004952 Polyamide Substances 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 230000035515 penetration Effects 0.000 description 4
- 229920002647 polyamide Polymers 0.000 description 4
- 150000003077 polyols Chemical class 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 239000000377 silicon dioxide Substances 0.000 description 4
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 3
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 239000006229 carbon black Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 229920001577 copolymer Polymers 0.000 description 3
- 229920006015 heat resistant resin Polymers 0.000 description 3
- 150000002513 isocyanates Chemical class 0.000 description 3
- FATBGEAMYMYZAF-KTKRTIGZSA-N oleamide Chemical compound CCCCCCCC\C=C/CCCCCCCC(N)=O FATBGEAMYMYZAF-KTKRTIGZSA-N 0.000 description 3
- 229920000728 polyester Polymers 0.000 description 3
- 229920005906 polyester polyol Polymers 0.000 description 3
- 239000004814 polyurethane Substances 0.000 description 3
- 229920002635 polyurethane Polymers 0.000 description 3
- 229920005604 random copolymer Polymers 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 description 2
- 229920002799 BoPET Polymers 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 241000221785 Erysiphales Species 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 229920002292 Nylon 6 Polymers 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 125000002723 alicyclic group Chemical group 0.000 description 2
- 125000001931 aliphatic group Chemical group 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 150000001408 amides Chemical class 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
- 150000001875 compounds Chemical class 0.000 description 2
- 238000007739 conversion coating Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000009820 dry lamination Methods 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000014509 gene expression Effects 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- RKISUIUJZGSLEV-UHFFFAOYSA-N n-[2-(octadecanoylamino)ethyl]octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(=O)NCCNC(=O)CCCCCCCCCCCCCCCCC RKISUIUJZGSLEV-UHFFFAOYSA-N 0.000 description 2
- 229920001707 polybutylene terephthalate Polymers 0.000 description 2
- 229920006267 polyester film Polymers 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 2
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- CPUBMKFFRRFXIP-YPAXQUSRSA-N (9z,33z)-dotetraconta-9,33-dienediamide Chemical compound NC(=O)CCCCCCC\C=C/CCCCCCCCCCCCCCCCCCCCCC\C=C/CCCCCCCC(N)=O CPUBMKFFRRFXIP-YPAXQUSRSA-N 0.000 description 1
- GUIUQQGIPBCPJX-CLFAGFIQSA-N (z)-n-[2-[[(z)-docos-13-enoyl]amino]ethyl]docos-13-enamide Chemical compound CCCCCCCC\C=C/CCCCCCCCCCCC(=O)NCCNC(=O)CCCCCCCCCCC\C=C/CCCCCCCC GUIUQQGIPBCPJX-CLFAGFIQSA-N 0.000 description 1
- XLBGPUCDXGNJPH-UHFFFAOYSA-N 1-(7-azabicyclo[3.3.1]nona-1(9),2,4-trien-7-yl)-2,2-dihydroxyoctadecan-1-one Chemical compound C1=CC(CN(C(=O)C(O)(O)CCCCCCCCCCCCCCCC)C2)=CC2=C1 XLBGPUCDXGNJPH-UHFFFAOYSA-N 0.000 description 1
- RDYWHMBYTHVOKZ-UHFFFAOYSA-N 18-hydroxyoctadecanamide Chemical compound NC(=O)CCCCCCCCCCCCCCCCCO RDYWHMBYTHVOKZ-UHFFFAOYSA-N 0.000 description 1
- FVUKYCZRWSQGAS-UHFFFAOYSA-N 3-carbamoylbenzoic acid Chemical compound NC(=O)C1=CC=CC(C(O)=O)=C1 FVUKYCZRWSQGAS-UHFFFAOYSA-N 0.000 description 1
- KXDHJXZQYSOELW-UHFFFAOYSA-M Carbamate Chemical compound NC([O-])=O KXDHJXZQYSOELW-UHFFFAOYSA-M 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 1
- 229920002302 Nylon 6,6 Polymers 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 239000004820 Pressure-sensitive adhesive Substances 0.000 description 1
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
- 229920002125 Sokalan® Polymers 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 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
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 229920001400 block copolymer Polymers 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 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
- 150000001718 carbodiimides Chemical class 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 239000000805 composite resin Substances 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- ILRSCQWREDREME-UHFFFAOYSA-N dodecanamide Chemical compound CCCCCCCCCCCC(N)=O ILRSCQWREDREME-UHFFFAOYSA-N 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- HSEMFIZWXHQJAE-UHFFFAOYSA-N hexadecanamide Chemical compound CCCCCCCCCCCCCCCC(N)=O HSEMFIZWXHQJAE-UHFFFAOYSA-N 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 229940072106 hydroxystearate Drugs 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- ZFSLODLOARCGLH-UHFFFAOYSA-N isocyanuric acid Chemical compound OC1=NC(O)=NC(O)=N1 ZFSLODLOARCGLH-UHFFFAOYSA-N 0.000 description 1
- NIMLQBUJDJZYEJ-UHFFFAOYSA-N isophorone diisocyanate Chemical compound CC1(C)CC(N=C=O)CC(C)(CN=C=O)C1 NIMLQBUJDJZYEJ-UHFFFAOYSA-N 0.000 description 1
- 239000011976 maleic acid Substances 0.000 description 1
- 230000000873 masking effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- BLAZSDHGLMGDRM-UHFFFAOYSA-N n-[[3-[(octadecanoylamino)methyl]phenyl]methyl]octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(=O)NCC1=CC=CC(CNC(=O)CCCCCCCCCCCCCCCCC)=C1 BLAZSDHGLMGDRM-UHFFFAOYSA-N 0.000 description 1
- LYRFLYHAGKPMFH-UHFFFAOYSA-N octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(N)=O LYRFLYHAGKPMFH-UHFFFAOYSA-N 0.000 description 1
- FATBGEAMYMYZAF-UHFFFAOYSA-N oleicacidamide-heptaglycolether Natural products CCCCCCCCC=CCCCCCCCC(N)=O FATBGEAMYMYZAF-UHFFFAOYSA-N 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000004584 polyacrylic acid Substances 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 239000011112 polyethylene naphthalate Substances 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
- B32B15/09—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising polyesters
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/105—Pouches or flexible bags
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/117—Inorganic material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/121—Organic material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/122—Composite material consisting of a mixture of organic and inorganic materials
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/124—Primary casings; Jackets or wrappings characterised by the material having a layered structure
- H01M50/126—Primary casings; Jackets or wrappings characterised by the material having a layered structure comprising three or more layers
- H01M50/129—Primary casings; Jackets or wrappings characterised by the material having a layered structure comprising three or more layers with two or more layers of only organic material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/131—Primary casings; Jackets or wrappings characterised by physical properties, e.g. gas permeability, size or heat resistance
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Materials Engineering (AREA)
- Laminated Bodies (AREA)
Abstract
The battery packaging material 1 is characterized by comprising a base layer 13, a heat-fusible resin layer 15, and a barrier layer 11 disposed between the layers, wherein a lubricant layer 20 is provided as an outermost layer on the outer side of the base layer 13, the lubricant layer 20 is composed of 2 layers in which a 1 st lubricant layer 21 on the base layer 13 side and a 2 nd lubricant layer 22 on the outer side are laminated, and the 1 st lubricant layer 21 and the 2 nd lubricant layer 22 are formed of different lubricants.
Description
Technical Field
The present invention relates to a battery packaging material suitable for use as a case of a lithium ion secondary battery for, for example, in-vehicle use, stationary use, notebook use, mobile phone use, and camera use, and particularly for small portable use, and a related technique thereof.
Background
In the battery manufacturing process, if damage occurs on the surface of the packaging material as the case material, the appearance of the product is impaired. In order to prevent appearance defects from occurring in such a manufacturing process, the following strategies are adopted: the protective tape is stuck on the packaging material in advance, and the protective tape is peeled off after the manufacturing process is completed. The protective tape is required to have adhesion that does not peel off during the manufacturing process, but if strongly adhered, the protective tape may remain on the packaging material after peeling off. In addition, in the case of a packaging material in which a colored layer containing carbon black on the surface is laminated, the colored layer may be peeled off together with the protective tape.
As to such problems associated with the protective tape, conventionally, the adhesive force of the protective tape has been applied to the adhesive residue of the protective tape after the release of the protective tape (see patent document 1). In addition, a technique of reinforcing a colored layer has been proposed for peeling off the colored layer (see patent document 2).
Prior art literature
Patent literature
Patent document 1: japanese patent laid-open No. 2020-155364
Patent document 2: japanese patent laid-open No. 2006-206805
Disclosure of Invention
Problems to be solved by the invention
However, the technique of patent document 1 is not a countermeasure against the remaining of the paste in the packaging material. In addition, the technique of patent document 2 cannot solve the problem of the remaining of the paste for a packaging material in which the outermost layer is not a colored layer containing carbon black.
Means for solving the problems
In view of the above background, an object of the present invention is to provide a protective tape to a surface of a battery packaging material, which is capable of being peeled off without accidental peeling, and which is capable of being peeled off without leaving an adhesive of the tape.
That is, the present invention has the following configurations [1] to [9 ].
[1] A packaging material for a battery, comprising a base layer, a heat-fusible resin layer, and a barrier layer disposed between the two layers, wherein the base layer has a lubricant layer as the outermost layer on the outer side thereof,
The lubricant layer is composed of 2 layers in which a 1 st lubricant layer on the substrate layer side and a 2 nd lubricant layer on the outer side are laminated, and the 1 st lubricant layer and the 2 nd lubricant layer are formed of different lubricants.
[2] The battery packaging material according to the above 1, wherein the lubricant of the 1 st lubricant layer is bisamide, and the lubricant of the 2 nd lubricant layer is monoamide.
[3]The battery packaging material according to the item 1 or 2, wherein the total amount of the lubricant of the 1 st lubricant layer and the lubricant of the 2 nd lubricant layer is 0.3mg/m 2 ～7mg/m 2 。
[4] The battery packaging material according to any one of the above 1 to 3, wherein a base material protective layer is disposed between the base material layer and the lubricant layer.
[5] The battery packaging material according to the above 4, wherein the base material protective layer is formed of a resin composition containing a resin component and solid fine particles, and has a surface gloss of 6.0GU or less.
[6] The battery packaging material according to the above 4 or 5, wherein the resin component of the base material protective layer is at least 1 of an acrylic resin, an epoxy resin, a urethane resin, a polyolefin resin, a fluorine resin, and a phenoxy resin.
[7] A method for producing a battery packaging material, characterized by comprising:
A base material layer laminating step of laminating a base material layer on one surface of the barrier layer;
a heat-fusible resin layer laminating step of laminating a heat-fusible resin layer on the other surface of the barrier layer;
a 1 st lubricant layer forming step of applying a 1 st lubricant to the surface of the base material layer and drying the same; and, a step of, in the first embodiment,
and a 2 nd lubricant layer forming step of forming a 2 nd lubricant layer formed of a 2 nd lubricant different from the 1 st lubricant on the 1 st lubricant layer.
[8] The method for producing a packaging material for a battery according to the aforementioned item 7, wherein,
in the step of forming the heat-fusible resin layer, the heat-fusible resin layer containing the lubricant of the 2 nd is laminated on the barrier layer,
the lubricant layer forming step of the 2 nd step is performed by: the intermediate laminate obtained by performing the base material layer laminating step, the heat-fusible resin layer forming step, and the 1 st lubricant layer forming step is wound around a roll, cured in a state where the heat-fusible resin layer is brought into contact with the 1 st lubricant layer, and the 2 nd lubricant deposited on the surface of the heat-fusible resin layer is adhered to the surface of the 1 st lubricant layer.
[9] The method for producing a packaging material for a battery according to claim 7, wherein the step of forming the 2 nd lubricant layer is performed by applying the 2 nd lubricant on the surface of the 1 st lubricant layer and drying the same.
ADVANTAGEOUS EFFECTS OF INVENTION
The battery packaging material according to item [1], wherein the outermost lubricant layer has a 2-layer structure composed of different lubricants, and the use of different lubricants in 2 layers can provide the reverse properties of protecting the adhesive tape from accidental peeling and peeling without leaving adhesive of the adhesive tape.
The battery packaging material according to item [2], wherein the bisamide of the 1 st lubricant layer can inhibit penetration into a layer disposed outermost other than the lubricant layer, for example, a base material layer, and the monoamide of the 2 nd lubricant layer can reduce the adhesiveness of the protective tape in a small amount. As a result, the reverse characteristic that the protective tape is not accidentally peeled off and peeling can be performed without leaving paste is obtained.
The battery packaging material according to item [3], wherein the surface of the battery packaging material can be reliably provided with opposite characteristics by the total amount of the lubricants in the 1 st lubricant layer and the 2 nd lubricant layer.
The battery packaging material according to item [4], wherein the protective tape is provided with a base material protective layer, whereby the adhesive residue of the protective tape is likely to occur, and the effect by the lubricant layer is more greatly exhibited.
The battery packaging material according to item [5], wherein the substrate protective layer is formed of a resin composition containing a resin component and solid fine particles, and has a surface gloss of 6.0GU or less, whereby irregularities continuous to the surface of the substrate protective layer are formed. Therefore, even if the lubricant escapes from the convex portion of the surface, the lubricant remains in the concave portion, and therefore the area where the protective tape directly contacts the base material protective layer is reduced, and the adhesive residue is suppressed.
The battery packaging material according to item [6], wherein the resin component of the base material protective layer is a resin having excellent chemical resistance, so that the resin is less likely to fall off of solid particles due to deterioration of the resin or the like, and surface irregularities are reliably formed. Further, the effect of reducing the contact area between the protective tape and the base material protective layer due to the lubricant remaining in the concave portion is sufficiently exhibited, and as a result, the adhesive residue can be suppressed.
The method for producing a packaging material for a battery according to item [7], wherein the outermost layer has a lubricant layer, and the outermost layer has properties such that the protective tape is not accidentally peeled off and the adhesive of the tape is not left to peel off.
The method of producing a packaging material for a battery according to item [8], wherein the 2 nd lubricant deposited from the heat-fusible resin layer is transferred onto the surface of the 1 st lubricant layer, whereby the 2 nd lubricant layer can be formed.
The method of producing a packaging material for a battery according to item [9], wherein the 2 nd lubricant layer can be formed by applying the 2 nd lubricant to the surface of the 1 st lubricant layer.
Drawings
FIG. 1 is a cross-sectional view of embodiment 1 of a battery packaging material according to the present invention.
Fig. 2 is a cross-sectional view of embodiment 2 of the battery packaging material of the present invention.
Fig. 3 is a sectional view of a battery case manufactured using the battery packaging material of fig. 1.
Detailed Description
Fig. 1 and 2 show 2 embodiments of a battery packaging material according to the present invention.
In the following description, the layers denoted by the same reference numerals denote the same or equivalent items, and a repetitive description thereof will be omitted.
[ embodiment 1 of packaging Material for Battery ]
In the battery packaging material 1 of fig. 1, a base material layer 13 is bonded to one surface of a barrier layer 11 via a 1 st adhesive layer 12, a heat-fusible resin layer 15 is bonded to the other surface via a 2 nd adhesive layer 14, and a lubricant layer 20 is laminated on the base material layer 13.
As shown in fig. 3, the battery packaging material 1 is arranged such that the heat-fusible resin layers 15 face each other, and the periphery of the battery packaging material 1 is heat-sealed to produce a battery case 50, and a bare cell 51 is sealed in the battery case 50. In the battery case 50, the lubricant layer side 20 is the outside, and the heat-fusible resin layer 15 is the inside. In the present specification, when the positions of the layers constituting the battery packaging material are described in terms of directions, the direction of the lubricant layer is referred to as the outer side and the direction of the heat-fusible resin layer is referred to as the inner side, depending on the direction of the inside and outside of the case.
Among the above layers, the barrier layer 11, the base layer 13, and the heat-fusible resin layer 15 are layers included in a conventionally known battery packaging material. The lubricant layer 20 is a layer unique to the present invention, and is a layer for reducing the adhesion of an adhesive protective tape such as a masking tape attached to the surface of the battery packaging material 1 and preventing the adhesive from remaining during peeling.
The following opposite characteristics are required for the outer side surface of the battery packaging material 1: the attached protective tape is required to be firmly attached without being accidentally peeled off, but the adhesive of the tape can be cleanly peeled off without remaining if the protective tape is not required. The lubricant improves the lubricity of the surface of the base material layer 13, but if the amount of the lubricant is too large, the adhesive tape cannot be attached, and if it is too small, the adhesion suppressing effect is lost. Further, since the lubricant may move into the resin due to the ambient temperature, the lubricant may permeate into the inside or precipitate out of the resin, and the effect of satisfying the above-described opposite characteristics may not be obtained due to the reduction in weight or the increase in volume, and it is difficult to ascertain an appropriate amount of lubricant applied.
In the present invention, the lubricant layer 20 is a 2-layer structure of the 1 st lubricant layer 21 on the substrate layer 13 side and the 2 nd lubricant layer 22 on the outer side, and different lubricants are used for the 2 layers, and by adjusting the types and amounts of the lubricant types, the protective tape can be provided on the surface of the battery packaging material 1 so as to have opposite properties that the protective tape is not accidentally peeled off and that the protective tape can be peeled off without leaving any adhesive. Here, the lubricant of the 1 st lubricant layer is referred to as 1 st lubricant, and the lubricant of the 2 nd lubricant layer is referred to as 2 nd lubricant.
As the 1 st lubricant, a lubricant having lubricity and having a three-dimensional structure which is not easily penetrated into the base material layer 13 and the base material protective layer 30 described later is suitable. Further, as the 2 nd lubricant, a simple structure having lubricity and having a molecular chain less prone to entanglement with each other is suitable.
As the lubricant layer 20 using different lubricants, a 2-layer structure using bisamide in the 1 st lubricant of the 1 st lubricant layer 21 and monoamide in the 2 nd lubricant of the 2 nd lubricant layer 22 may be recommended.
Bisamides have a larger molecule than monoamides, and therefore are less likely to penetrate into the resin in terms of molecular structure. On the other hand, monoamides have a simple structure that is lower than bisamides and has a smaller molecule, and therefore, the monoamides can easily move inside and outside the resin. That is, the resin is likely to penetrate into the resin and to be easily deposited from the resin to the surface. Then, the 1 st lubricant layer 21 in contact with the base layer 13 uses bisamide to form a lubricant layer with a small reduction in amount due to permeation into the base layer 13, and the 1 st lubricant layer 21 suppresses permeation of the amide of the 2 nd lubricant layer 22 into the base layer 13. The 1 st lubricant layer 21 suppresses penetration of the monoamide of the 2 nd lubricant layer 22 into the base material layer 13, and thus a lubricant layer that can reduce the adhesiveness of the protective tape can be formed with a small amount of monoamide. Further, by forming the 2 nd lubricant layer 22 with a small amount of monoamide, the opposite property of not accidentally peeling off and peeling off without leaving a binder can be imparted to the surface of the battery packaging material 1.
Examples of the bisamide include saturated fatty acid bisamides, unsaturated fatty acid bisamides, and aromatic bisamides, and unsaturated fatty acid bisamides are recommended for the reason that the bisamides are less likely to penetrate into the substrate layer and the substrate protective layer due to the arrangement of the three-dimensional structure and the functional group. In addition, bisamides having a melting point of 110℃to 145℃are preferred, and bisamides having a melting point of 110℃to 120℃are particularly preferred. If the melting point of the bisamide is too low, the bisamide is melted by heat and unevenly exists when applied to the base material layer 13 or the base material protective layer 30 described later, or is obtained by the application roller, so that it is difficult to apply a sufficient amount of the bisamide, and the effect of suppressing the penetration of the monoamide of the 2 nd lubricant layer 22 is reduced. On the other hand, if the melting point of the bisamide is too high, the bisamide is difficult to dissolve in a solvent, and the coatability is deteriorated. From the above viewpoints, the above bisamides having the melting point range are preferable.
The saturated fatty acid bisamide, unsaturated fatty acid bisamide, and aromatic bisamide that can be used in the present invention are described below. The temperature within () after the bisamide name is the melting point.
Examples of the saturated fatty acid bisamide include methylene bisstearamide, ethylene bisdecanoate amide, ethylene bislaurate amide, ethylene bisstearate amide, ethylene bishydroxystearate amide, ethylene bisbehenate amide (140 ℃), hexamethylene bisstearate amide, hexamethylene bisbehenate amide (140 ℃), hexamethylene hydroxystearate amide, N '-distearyl adipate amide and N, N' -distearyl sebacate amide.
Examples of the unsaturated fatty acid bisamide include ethylene bis-oleamide (115 to 118 ℃), ethylene bis-erucamide, hexamethylenebis-oleamide (Japanese, N ' -dioleyladipamide, N ' -dioleylactamide, and N, N ' -dioleylactamide.
Examples of the aromatic bisamide include m-xylylene bisstearamide (123 ℃), m-xylylene bishydroxystearamide, and N, N' -distearyl isophthalic acid amide.
As the monoamide, a saturated fatty acid monoamide and an unsaturated fatty acid monoamide are exemplified, and for reasons of low melting point and easy movement of molecules inside and outside the resin, an unsaturated fatty acid monoamide having a linear structure is recommended. In addition, monoamides having a melting point of 110℃or lower are preferable, and monoamides having a melting point of 100℃or lower are particularly preferable. When the melting point of monoamide is low, precipitation is likely to occur. In the case of using a method of transferring the lubricant deposited on the surface of the heat-fusible resin layer 15 described later to the surface of the 1 st lubricant layer 21 as the method of forming the 2 nd lubricant layer 22, when monoamides having a low melting point and being likely to deposit are used, the formation of the 2 nd lubricant layer 22 is facilitated. Therefore, in the case of forming the 2 nd lubricant layer 22 by transfer, monoamides having a melting point of 110 ° or less can be recommended.
The saturated fatty acid monoamides and unsaturated fatty acid monoamides usable in the present invention are listed below. The temperature within () after the monoamide name is the melting point.
Examples of the saturated fatty acid amide include lauric acid amide (87 ℃), palmitic acid amide (100 ℃), stearic acid amide (101 ℃), behenic acid amide (110 ℃) and hydroxystearic acid amide (> 105 ℃).
Examples of the unsaturated fatty acid amide include oleic acid amide (82 ℃ C.) and erucic acid amide (73 ℃ C.).
Since the unsaturated fatty acid bisamide has a double bond in the molecule, the molecular structure is less likely to change than that of the saturated fatty acid bisamide, and therefore, even in a small amount, the coefficient of kinetic friction can be reduced. Thus, the unsaturated fatty acid bisamide can obtain desired properties in a small amount as compared with the saturated fatty acid bisamide. In addition, regarding the monoamides, for the same reason, the unsaturated fatty acid monoamides can also obtain desired properties in a small amount as compared with the saturated fatty acid monoamides.
In addition, as a combination of 2 kinds of lubricants, a combination of bisamide (1 st lubricant) and bisamide (2 nd lubricant) different from the 1 st lubricant may be used in addition to the monoamide and bisamide described above.
With respect to the preferable lubricant amount in the lubricant layer 20, the 1 st lubricant layer 21 is 0.2mg/m 2 ～6.8mg/m 2 Lubricant layer 2 22 is 0.1mg/m 2 ～3.5mg/m 2 . If the lubricant amount of the 1 st lubricant layer 21 is less than 0.2mg/m 2 The base material layer 13 or the base material protective layer 30 described later cannot be sufficiently coated, and therefore the effect of suppressing the permeation of the amide of the 2 nd lubricant layer 22 becomes small. The lubricant amount of the 2 nd lubricant layer 22 is smaller than 0.1mg/m in the same manner as the 1 st lubricant layer 21 2 Since the 1 st lubricant layer 21 cannot be sufficiently coated, the effect of reducing the pressure-sensitive adhesive property of the protective tape is reduced, and the possibility of the occurrence of a tacky paste residue is increased. On the other hand, if the lubricant amount of the 1 st lubricant layer 21 exceeds 6.8mg/m 2 Lubricant amount of lubricant layer 2 22 exceeds 3.5mg/m 2 There is a concern that the adhesion of the protective tape may be significantly reduced, and powdery mildew may be generated during molding, thereby reducing the workability. For a more preferred lubricant amount of each layer, lubricant layer 1 21 is 0.2mg/m 2 ～4.9mg/m 2 Lubricant layer 2 22 is 0.1mg/m 2 ～3.0mg/m 2 。
In addition, the lubricant of the 1 st lubricant layer 21 and the 2 nd lubricant layer 22The total amount is preferably 0.3mg/m 2 ～7mg/m 2 More preferred total amount of lubricant is 0.3mg/m 2 ～5mg/m 2 . When the total amount of the lubricants is less than the lower limit, the possibility of occurrence of adhesive residue of the protective tape becomes high, and when the total amount exceeds the upper limit, the adhesion of the protective tape may be significantly reduced, and further, powdery mildew may be generated during molding, which may deteriorate workability.
The 1 st lubricant layer 21 and the 2 nd lubricant layer 22 may contain a solvent for adjusting the concentration in addition to the above lubricant.
In the battery packaging material 1, preferred materials for the layers other than the lubricant layer 20 are as follows.
(Barrier layer)
The barrier layer 11 plays a role of imparting a gas barrier property against the invasion of oxygen and moisture to the battery packaging material 1. The barrier layer 11 is not particularly limited, and examples thereof include metal foils such as aluminum foil, SUS foil (stainless steel foil), copper foil, nickel foil, titanium foil, and clad foil (clad foil). The thickness of the barrier layer 11 is preferably 20 μm to 100 μm. By setting the thickness to 20 μm or more, pinholes can be prevented from being generated during rolling in the production of the metal foil, and by setting the thickness to 100 μm or less, stress during molding such as bulge molding and drawing molding can be reduced, and moldability can be improved. The thickness of the barrier layer 11 is particularly preferably 25 μm to 85 μm.
In addition, in the barrier layer 11, at least the surface of the metal foil on the side of the heat-fusible resin layer 15 is preferably subjected to a base treatment such as a chemical conversion treatment. By performing such chemical conversion treatment, corrosion of the metal foil surface due to the content (electrolyte of the battery, etc.) can be sufficiently prevented.
(substrate layer)
The base material layer 13 is a heat-resistant resin film that does not melt at the heat-sealing temperature at the time of heat-sealing the battery packaging material 1. As the heat-resistant resin, a heat-resistant resin having a melting point 10 ℃ or higher, preferably 20 ℃ or higher than the melting point of the resin constituting the heat-fusible resin layer 15 is used. Examples of the resin satisfying this condition include polyamide films such as nylon films and polyester films, and stretched films thereof are preferably used. Among them, biaxially stretched polyamide films such as biaxially stretched nylon films, biaxially stretched polybutylene terephthalate (PBT) films, biaxially stretched polyethylene terephthalate (PET) films, or biaxially stretched polyethylene naphthalate (PEN) films are particularly preferably used as the base layer 13. The nylon film is not particularly limited, and examples thereof include nylon 6 film, nylon 6,6 film, MXD nylon film, and the like. The base material layer 13 may be formed of a single layer, or may be formed of a plurality of layers including, for example, a polyester film/polyamide film (a plurality of layers including a PET film/nylon film, or the like).
The thickness of the base material layer 13 is preferably 9 to 50 μm, so that sufficient strength as a packaging material can be ensured, and the stress at the time of molding such as bulge molding or drawing can be reduced, thereby improving moldability. The thickness of the base layer 13 is preferably 9 to 30. Mu.m.
(Heat-fusible resin layer)
The heat-fusible resin layer 15 has an effect of imparting heat sealability to the battery packaging material 1 while having excellent chemical resistance to a highly corrosive electrolyte or the like.
The resin constituting the heat-fusible resin layer 15 is preferably an acrylic resin, and is preferably an unstretched film. As the propylene-based resin, an ethylene-propylene copolymer containing ethylene and propylene as copolymerization components can be exemplified. The ethylene-propylene copolymer may be any of a random copolymer and a block copolymer. The heat-fusible resin layer 15 may be a single-layer film or a multilayer film. As the multi-layered ethylene-propylene copolymer film, a 3-layer film of a random copolymer-block copolymer-random copolymer may be recommended. The multilayer film may be produced by coextrusion or the like.
The thickness of the heat-fusible resin layer 15 is preferably 20 μm to 100 μm, more preferably 25 μm to 80 μm. The ratio of the thicknesses of the respective layers in the 3-layer film of the random copolymer-block copolymer-random copolymer is preferably 1 to 3: 4-8: 1 to 3.
In the method for producing the battery packaging material of the present invention described later, the 2 nd lubricant layer 22 may be formed by using the lubricant in the heat-fusible resin layer 15. Specifically, the 2 nd lubricant is previously contained in the heat-fusible resin layer 15, and the intermediate laminate formed by laminating the 1 st lubricant layer 21, the base layer 13, the 1 st adhesive layer 12, the barrier layer 11, the 2 nd adhesive layer 14, and the heat-fusible resin layer 15 in this order is wound around a roll, cured in a state in which the heat-fusible resin layer 15 is brought into contact with the 1 st lubricant layer 21, and the 2 nd lubricant deposited on the surface of the heat-fusible resin layer 15 is adhered to the surface of the 1 st lubricant layer 21, thereby forming the 2 nd lubricant layer 22. That is, the 2 nd lubricant layer 22 is formed by transferring the 2 nd lubricant deposited on the surface of the heat-fusible resin layer 15 onto the 1 st lubricant layer 21.
When the 2 nd lubricant layer 22 is formed by the above method, the 2 nd lubricant concentration in the heat-fusible resin layer 15 is preferably set to 500ppm to 5000ppm, more preferably 700ppm to 3000 ppm.
Since the 2 nd lubricant layer 22 may be formed by coating the 2 nd lubricant on the 1 st lubricant layer 21, the presence or absence of the 2 nd lubricant in the heat-fusible resin layer 15 and the preferable concentration thereof may be different depending on the method of forming the 2 nd lubricant layer 22.
(1 st adhesive layer)
The 1 st adhesive layer 12 is not particularly limited, and examples thereof include an adhesive layer formed of a 2-liquid curable adhesive. Examples of the 2-liquid curable adhesive include a 2-liquid curable adhesive comprising a 1 st liquid (main agent) and a 2 nd liquid (curing agent) containing isocyanate, wherein the 1 st liquid (main agent) contains 1 or more kinds of polyols selected from the group consisting of polyurethane polyols, polyester polyols, polyether polyols and polyester urethane polyols. Among them, a 2-liquid curable adhesive comprising a 1 st liquid (main agent) containing 1 or more polyols selected from the group consisting of polyester polyols and polyester urethane polyols and a 2 nd liquid (curing agent) containing isocyanate is preferably used. The 1 st adhesive layer 12 preferably has a thickness of 2 μm to 5. Mu.m.
(adhesive layer 2)
The 2 nd adhesive layer 14 is not particularly limited, and for example, an adhesive containing 1 or more kinds of polyurethane resin, acrylic resin, epoxy resin, polyolefin resin, elastomer resin, fluorine resin, and acid-modified polypropylene resin is recommended. Among them, an adhesive formed of a polyurethane composite resin based on an acid-modified polyolefin is preferable. The thickness of the 2 nd adhesive layer 14 is preferably 2 μm to 5 μm.
The 1 st adhesive layer 12 and the 2 nd adhesive layer 14 are not essential, but the base material layer 13 may be directly bonded to the barrier layer 11, or the heat-fusible resin layer 15 may be directly bonded to the barrier layer 11.
[ embodiment 2 of a packaging Material for Battery ]
In the battery packaging material 2 of fig. 2, a base layer 13 is bonded to one surface of a barrier layer 11 via a 1 st adhesive layer 12, a heat-fusible resin layer 15 is bonded to the other surface via a 2 nd adhesive layer 14, a base protective layer 30 is laminated by coating on the outside of the base layer 13, and a lubricant layer 20 is laminated on the outside of the base protective layer 30. That is, the substrate protective layer 30 is different from the battery packaging material 1 of fig. 1 in that it is interposed between the substrate layer 13 and the lubricant layer 20.
(protective layer for substrate)
The base material protective layer 30 is a layer disposed outside the base material layer 13 for the purpose of imparting the visibility and improving the characteristics to the packaging material. However, when the base material protective layer 30 is present, movement of the lubricant between molecules in the layer is easier than that in the base material layer 13, and therefore, particularly, penetration of the lubricant having a small molecular weight into the base material protective layer becomes large, and therefore, the amount of the lubricant present on the surface becomes small, and the problem of the adhesive residue of the protective tape is easily caused, and therefore, the effect due to formation of a different 2-layer lubricant layer is more remarkably exhibited.
As the substrate protective layer 30, a layer formed of a resin composition containing a resin component and solid fine particles and having a surface gloss of 6.0GU or less can be exemplified.
The substrate protective layer 30 containing solid particles has an influence on the surface glossiness. When the surface glossiness of the base material protective layer 30 is high, the surface becomes smooth and the lubricant is easily moved, so that the protective tape is directly stuck to the base material protective layer 30 by squeezing the lubricant when the protective tape is stuck, and thus, a paste residue is easily generated. However, as the surface glossiness of the base material protective layer 30 becomes lower, a continuous uneven surface is formed. And, the lubricant is preferentially pushed back at the convex portion while the protective tape is in direct contact with the base material protective layer 30, but the lubricant is interposed between the protective tape and the base material protective layer 30 at the concave portion. Therefore, the contact area between the protective tape and the base material protective layer 30 is reduced, and as a result, the adhesive residue is suppressed. In other words, on the surface with less irregularities, the lubricant escapes, and the area of the protective tape in direct contact with the base material protective layer 30 increases, but on the surface with more irregularities, even if the lubricant escapes from the convex portions, the lubricant remains in the concave portions, and therefore the area of the protective tape in direct contact with the base material protective layer 30 decreases, and the adhesive residue is suppressed. In order to obtain such an effect of suppressing the tacky paste residue, the substrate protective layer 30 contains a resin component and solid fine particles, and has a surface gloss of 6.0GU or less. Further preferable surface gloss of the base material protective layer 30 is 5.0GU or less.
In the substrate protective layer 30, a preferable resin component and solid particles are as follows.
As the resin component, at least 1 resin selected from the group consisting of acrylic resin, epoxy resin, urethane resin, polyolefin resin, fluorine resin, and phenoxy resin is preferably used. These resins have high chemical resistance and solvent resistance. Among these, urethane-based resins and polyester polyurethane-based resins are particularly preferable. These resins are excellent in chemical resistance, and therefore are less likely to fall off of solid particles due to deterioration of the resin or the like, and surface irregularities are reliably formed. Further, the effect of reducing the contact area between the protective tape and the base material protective layer 30 due to the lubricant remaining in the concave portion is sufficiently exhibited, and as a result, the adhesive residue can be suppressed.
The resin component may be a main resin containing at least 1 resin described above and a curing agent for curing the main resin.
The curing agent is not particularly limited, and may be appropriately selected depending on the main resin. When the main resin is a mixture of a urethane resin and a phenoxy resin, an isocyanate compound is preferably used. The isocyanate compound may be a polyfunctional isocyanate compound of various aliphatic, alicyclic or aromatic systems. Examples of the aliphatic polyfunctional isocyanate compound include Hexamethylene Diisocyanate (HDI), examples of the alicyclic polyfunctional isocyanate compound include isophorone diisocyanate (IPDI), and examples of the aromatic polyfunctional isocyanate compound include Toluene Diisocyanate (TDI) and diphenylmethane diisocyanate (MDI). Further, modified products of these polyfunctional isocyanate compounds may be used, and examples thereof include polyfunctional isocyanate modified products by polymerization reactions such as isocyanurate, carbodiimide and polymerization.
The curing agent is preferably blended in an amount of 5 to 30 parts by mass per 100 parts by mass of the main resin. When the amount is less than 5 parts by mass, the adhesion to the base material layer 13 may be lowered. If the amount exceeds 30 parts by mass, the base material protective layer 30 may be hardened and the moldability may be lowered. The amount of the curing agent is particularly preferably 10 to 20 parts by mass based on 100 parts by mass of the main resin.
The solid fine particles are added to affect the surface glossiness of the base material protective layer 30, that is, the uneven surface morphology, and to impart lubricity to the base material protective layer 30 to improve moldability. As the solid fine particles exhibiting the above-mentioned effects, any of inorganic fine particles and organic fine particles may be used, or they may be mixed and used. Examples of the inorganic fine particles include silica, alumina, calcium oxide, calcium carbonate, calcium sulfate, calcium silicate, and carbon black, and as the organic fine particles, fine particles such as an acrylate compound, a polystyrene compound, an epoxy resin, a polyamide compound, or a crosslinked product thereof can be used. The solid particles may be used in an amount of 1 or 2 or more.
For these solid fine particles, fine particles having an average particle diameter of 1 μm to 10 μm, preferably 2 μm to 5 μm, are preferably used in order to obtain a surface gloss of 6.0GU or less. When solid fine particles having a particle diameter of less than 1 μm are used, they are buried in the coating liquid, and it is difficult to obtain desired characteristics. On the other hand, when solid fine particles having a particle diameter of more than 10 μm are used, the particle diameter exceeds the coating thickness and is easily detached.
The content of the solid fine particles in the resin composition is appropriately determined in the range of 0.1 to 60 mass% depending on the surface gloss, lubricity, particle diameter and type of the fine particles to be added. When the content is less than 0.1 mass% or more than 60 mass%, it is difficult to obtain desired surface gloss and lubricity. The content of the solid fine particles is preferably in the range of 5 to 55 mass%, and particularly preferably in the range of 20 to 50 mass%.
In the present invention, the resin composition constituting the base material protective layer 30 does not exclude the above resin component and the component other than the solid fine particles, and other components may be added as long as the characteristics of the base material protective layer 30 are not impaired.
The thickness of the substrate protective layer 30 after curing is preferably 1 to 10. Mu.m. When the layer is thinner than the lower limit, the lubricity improving effect is reduced, and when the layer is thicker than the upper limit, the cost is increased. Particularly preferred thicknesses are in the range of 2 to 5. Mu.m.
In the battery packaging material of the present invention, the lubricant layer is always the outermost layer, and a lubricant layer having a 2-layer structure is formed on the surface of the layer disposed outermost other than the lubricant layer. In the battery packaging material 1 of fig. 1, since the outermost layer other than the lubricant layer 20 is the base layer 13, the lubricant layer 20 is formed on the surface of the base layer 13. In the battery packaging material 2 of fig. 2, since the outermost layer other than the lubricant layer 20 is the base material protective layer 30, the lubricant layer 20 is formed on the surface of the base material protective layer 30. Similarly, in the case where the outermost layer other than the lubricant layer is a layer that replaces the base material layer 13 and the base material protective layer 30, a lubricant layer having a 2-layer structure is formed on the surface of the layer. The present invention is not limited to the outermost layer other than the lubricant layer, i.e., the base material layer 13 of fig. 1 and the base material protective layer 30 of fig. 2.
[ method for producing Battery packaging Material ]
The battery packaging material 1 of fig. 1 can be manufactured by the following method.
Since the barrier layer 11, the base material layer 13, and the heat-fusible resin layer 15 of the battery packaging material 1 are known layers, the lamination step of these 3 layers, that is, the base material lamination step and the heat-fusible resin lamination step are performed by known methods.
In the base material layer laminating step, the base material layer 13 is laminated on one surface of the barrier layer 11. When the 1 st adhesive layer is formed, the 1 st adhesive layer 12 is formed on one surface of the barrier layer 11 or one surface of the base material layer 13, and the barrier layer 11 and the base material layer 13 are bonded by a dry lamination method or the like.
In the heat-fusible resin layer laminating step, the heat-fusible resin layer 15 is laminated on the other surface of the barrier layer 11. When the 2 nd adhesive layer 14 is formed, the barrier layer 11 and the heat-fusible resin layer 15 are bonded to each other by a dry lamination method or the like on the other surface of the barrier layer 11 or on the one surface of the heat-fusible resin layer 15, the 2 nd adhesive layer 14 being formed.
After the base material layer laminating step, a 1 st lubricant layer forming step is performed. In the 1 st lubricant layer forming step, the 1 st lubricant is applied to the surface of the base layer 13, and the 1 st lubricant whose concentration is adjusted with a solvent as needed is dried to form the 1 st lubricant layer 21. The present method has an advantage that a lubricant which is less likely to penetrate and precipitate in the substrate layer and the substrate protective layer can be reliably applied in a predetermined amount.
The lubricant layer 2 is formed after the lubricant layer 1 is formed. The method of forming the 2 nd lubricant layer 22 is 2 methods of coating and transferring the 2 nd lubricant.
When the 2 nd lubricant layer is formed by coating, the 2 nd lubricant is coated on the 1 st lubricant layer 21, and the 2 nd lubricant whose concentration is adjusted with a solvent as needed is dried to form the 2 nd lubricant layer 22. The present forming method has an advantage in that the 2 nd lubricant layer can be reliably formed even for a sheet-type laminated body.
When the 2 nd lubricant layer 22 is formed by transfer, the 2 nd lubricant is previously contained in the heat-fusible resin layer 15. The step of laminating the heat-fusible resin layer may be performed by the same method, regardless of the presence or absence of the 2 nd lubricant in the heat-fusible resin layer 15.
Then, the intermediate laminate obtained by performing the base material layer laminating step, the heat-fusible resin layer forming step, and the 1 st lubricant layer forming step is wound around a roll, and the 2 nd lubricant is deposited on the surface of the heat-fusible resin layer 15 by, for example, curing in a state where the heat-fusible resin layer 15 is brought into contact with the 1 st lubricant layer 21, and then the deposited 2 nd lubricant is adhered to the surface of the 1 st lubricant layer 21, thereby forming the 2 nd lubricant layer 22. That is, the 2 nd lubricant on the surface of the heat-fusible resin layer 15 is transferred to the surface of the 1 st lubricant layer 21. The amount of deposition varies depending on the resin constituting the heat-fusible resin layer 15, and is controlled by the temperature and the concentration of the resin. The present method of formation has the advantage that no special 2 nd lubricant layer forming step is required. That is, curing after bonding the barrier layer, the base material layer, and the heat-fusible resin layer is a normal process performed to stabilize the adhesive layer in the production of the conventional battery packaging material having no lubricant layer, and by curing, the 2 nd lubricant layer 22 can be formed while the adhesive layer is stabilized.
By the above steps, the battery packaging material 1 having the laminated structure of fig. 1 can be produced.
The battery packaging material 2 of fig. 2 has a base material protective layer 30 on the outer side of the base material layer 13. Therefore, the substrate protective layer lamination step is performed after the substrate lamination step, and the substrate protective layer 30 is laminated on the outer side of the substrate layer 13. Then, the 1 st lubricant layer forming step is performed after the substrate protective layer laminating step, and the 1 st lubricant layer 21 forming step is performed on the surface of the substrate protective layer 30. The 2 nd lubricant layer forming step is common to the case of producing the battery packaging material 1 of fig. 1.
In the battery packaging material of the present invention, since the lubricant layer is always the outermost layer, the 1 st lubricant layer 21 is always formed on the surface of the outermost layer other than the lubricant layer 20. Therefore, when the outermost layer other than the lubricant layer 20 is a layer that replaces the base layer 13 and the base protective layer 30, the 1 st lubricant layer 21 is formed on the surface of the layer, and the 2 nd lubricant is applied or transferred to the 1 st lubricant layer 21 to form the 2 nd lubricant layer 22, whereby a battery packaging material having a desired laminated structure can be produced.
Examples
Packaging materials for batteries of examples and comparative examples were produced. The materials common to each example are as follows.
(common Material)
As the barrier layer 11, the following layers are used: a chemical conversion coating film was formed by coating both sides of an aluminum foil having a thickness of 40 μm and formed of A8021-O with a chemical conversion treatment liquid containing phosphoric acid, polyacrylic acid (acrylic resin), a chromium (III) salt compound, water and alcohol, and drying the resultant film at 180 ℃. The chromium adhesion amount of the chemical conversion coating was 10mg/m on each side 2 。
As the base material layer 13, a biaxially stretched nylon 6 film having a thickness of 15 μm was used.
As the heat-fusible resin layer 15, an unstretched polypropylene film having a thickness of 40 μm was used. In examples 1 to 18 and comparative example 1, as the 2 nd lubricant for forming the 2 nd lubricant layer, an unstretched film obtained by adding Erucamide (EA) or Behenamide (BA) at the concentration shown in table 1 was used.
As the 1 st adhesive layer 12, a 2-liquid curable urethane adhesive was used.
As the 2 nd adhesive layer 14, a 2 nd liquid curing type maleic acid modified propylene adhesive was used.
Examples 1 to 7, 10 to 16 and 19 to 21
A battery packaging material 2 having a laminated structure shown in fig. 2 was produced.
The resin composition for forming the base material protective layer 30 was prepared by the following method. Using a polyester polyol resin as a main resin, and taking Toluene Diisocyanate (TDI) and Hexamethylene Diisocyanate (HDI) as mass ratio 1:1 as a curing agent, and a resin component of the main resin 100 parts by mass and 15 parts by mass of a curing agent. Then, the silica having an average particle diameter of 2 μm was uniformly dispersed so as to be contained in the resin component in an amount of 20 mass% based on the whole.
First, a 1 st adhesive layer 12 having a thickness of 3 μm is formed on one surface of the barrier layer 11, and a base layer 13 is dry-laminated with the 1 st adhesive layer 12 interposed therebetween. Next, a 2 nd adhesive layer 14 having a thickness of 3 μm was formed on the other surface of the barrier layer 11, and a heat-fusible resin layer 15 was laminated via the 2 nd adhesive layer 14, and the laminate was pressed between a rubber roll and a laminating roll heated to 100 ℃. Thereby forming a 3-layer laminated film.
Next, the resin composition for the base material protective layer 30 was applied to the surface of the base material layer 13 of the 3-layer laminated film and dried. The thickness of the dried substrate protective layer 30 was 4 μm. This results in a 4-layer film.
Next, a solution obtained by adding isopropyl alcohol to the 1 st lubricant shown in table 1 was applied to the surface of the 4-layer film substrate protective layer 30, and dried at 150 ℃. Thereby, the 1 st lubricant layer 21 is formed.
Next, the laminate having the 1 st lubricant layer 21 formed thereon is wound around a roll. In the wound laminate, the 1 st lubricant layer 21 was brought into contact with the heat-fusible resin layer 15, and cured at 40℃for 10 days.
Then, during the curing period, the 2 nd lubricant is deposited from the heat-fusible resin layer 15, and the deposited 2 nd lubricant is transferred to the surface of the 1 st lubricant layer 21, thereby forming the 2 nd lubricant layer 22.
Example 8
A battery packaging material 2 having a laminated structure shown in fig. 2 was produced.
The resin composition for forming the base material protective layer 30 was prepared by the following method. Phenoxy resin and carbamate resin are calculated according to the mass ratio of 1:0.8 as a main resin, toluene Diisocyanate (TDI) and Hexamethylene Diisocyanate (HDI) were mixed in a mass ratio of 1:1 as a curing agent, and 15 parts by mass of a curing agent is blended with 100 parts by mass of a main resin as a resin component. The silica having an average particle diameter of 2 μm was uniformly dispersed so as to be contained in the resin component in an amount of 20 mass% based on the whole.
A packaging material for a battery was produced in the same manner as in example 1, except for the composition of the base material protective layer 30.
Example 9
A battery packaging material 2 having a laminated structure shown in fig. 2 was produced.
The resin composition for forming the base material protective layer 30 was prepared by the following method. Using acrylic polyol as a main resin, toluene Diisocyanate (TDI) and Hexamethylene Diisocyanate (HDI) are calculated according to a mass ratio of 1:1 as a curing agent, and 10 parts by mass of a curing agent was blended with 100 parts by mass of a main resin as a resin component. Then, the silica having an average particle diameter of 2 μm was uniformly dispersed so as to be contained in the resin component in an amount of 20 mass% based on the whole.
A packaging material for a battery was produced in the same manner as in example 1, except for the composition of the base material protective layer 30.
Example 17 and 18
A battery packaging material 1 having a laminated structure shown in fig. 1 was produced.
The battery packaging material 1 was produced in the same manner as in example 1, except that the base material protective layer 30 was not formed.
Comparative example 1
A battery packaging material was produced in the same manner as in example 1, except that the 1 st lubricant layer 21 was not formed. Therefore, the battery packaging material of this example does not have the 1 st lubricant layer 21, but has the 2 nd lubricant layer 22 transferred from the heat-fusible resin layer 15.
Comparative example 2, 3
A packaging material for a battery was produced in the same manner as in example 1, except that a lubricant was not added to the resin composition for forming the heat-fusible resin layer 15. Therefore, the battery packaging material of this example has the 1 st lubricant layer 21 but does not have the 2 nd lubricant layer 22 on the surface of the base material protective layer 30.
Comparative example 4
A battery packaging material was produced in the same manner as in example 1, except that the 1 st lubricant layer 21 was not formed, and the 2 nd lubricant was not added to the resin composition for forming the heat-fusible resin layer 15. Therefore, the battery packaging material of this example does not have the 1 st lubricant layer 21 and the 2 nd lubricant layer 22.
In the examples and comparative examples described above, ethylene bis-oleamide was often used as the 1 st lubricant because of high solubility in solvents and good coating work efficiency. In addition, erucamide is often used as the 2 nd lubricant because bleeding is easily adjusted, and the 2 nd lubricant layer is easily formed by transfer.
The amount of lubricant and the surface gloss (GU value) of the produced battery packaging material were measured by the following methods, and the adhesive tape adhesion and the appearance after the tape was peeled were evaluated. The results are shown in table 1.
(amount of Lubricant)
The battery packaging material was cut into 10cm×10cm pieces as test materials. The test material was folded in half so that the lubricant layer (comparative example 4 was a base protective layer) was positioned inward to give a film of 5cm×10cm, and the film of 5cm 2 was sealed from the heat-fusible resin layer via a PET film to prepare a bag. 1mL of acetone was added to the bag, and the bag was left in a state where the inner surface of the bag was in close contact with acetone for 3 minutes, after which a liquid containing acetone and a lubricant was extracted from the bag.
The extracted liquid was fed into a gas chromatograph, and the type of lubricant and the amount of lubricant contained in the liquid were determined from the detection data by a standard curve method.
(surface gloss)
For the battery packaging materials of examples 17 and 18 except for the non-formation of the base material protective layer, the surface gloss (GU value) was measured at a reflection angle of 60 ° using "micro-TRI-gloss-s" manufactured by BYK corporation as a measuring device.
(adhesive tape adhesion)
Test pieces 15mm wide by 150mm long were cut out of the battery packaging material. An adhesive tape (tesa 70415) having a width of 5mm×a length of 80mm and an adhesive force of 13N/cm was attached to the lubricant layer (substrate protective layer in comparative example 4) of the test piece along the longitudinal direction of the test piece. Then, a manual roller having a weight of 2kgf was reciprocated on the adhesive tape 5 times, and then allowed to stand at normal temperature for 1 hour.
Then, using a Strerograph (AGS-5 kNX) manufactured by Shimadzu corporation as a tensile tester, one of the chucks was used to hold and fix the end of the test piece, and the other chuck was used to hold the end of the adhesive tape. Then, the peel strength at 180℃at a peeling rate of 300mm/min was measured in accordance with JIS K6854-3 (1999), and the value obtained by stabilizing the measured value was used as the adhesion force (unit: N/5 mm) between the test piece and the adhesive tape.
Then, the adhesion between the test piece and the adhesive tape was evaluated according to the following criteria.
Very high adhesion: 7N/5mm or more
And (2) high adhesion: 5N/5mm or more and less than 7N/5mm
The x adhesion was low: less than 5N/5mm
(appearance after tape stripping)
Test pieces 15mm wide by 150mm long were cut out of the battery packaging material. An adhesive tape (tesa 70415) having a width of 5mm×a length of 80mm and an adhesive force of 13N/cm was attached to the lubricant layer (substrate protective layer in comparative example 4) of the test piece along the longitudinal direction of the test piece. Then, a manual roller having a weight of 2kgf was reciprocated on the adhesive tape 5 times, and then allowed to stand at normal temperature for 1 hour.
Next, the mixture was allowed to stand in a vacuum drier set at 80℃X gauge pressure-100 kPa for 1 day (24 hours) at 80℃at 500kg/m 2 After hot pressing for 3 hours under the condition of 45 DEG CThe sample was allowed to stand for 2 days (48 hours) in the constant temperature bath.
The adhesive tape was manually and rapidly peeled from the test piece after the treatment, and the peeled surface was observed and evaluated according to the following criteria.
And (3) the following materials: the surface state is not changed at all compared with that before sealing and pasting
And (2) the following steps: small pieces of adhesive remain to the extent that they can be removed by gentle wiping
Delta: although wiping can remove, the adhesive remains in a large piece compared with the wiping
X: firmly residual adhesive components to such an extent that they cannot be removed even by wiping
TABLE 1
Short for lubricant:
erucamide (EA), behenamide (BA), ethylenebisoleamide (EBOA),
Ethylene bis-stearamide (EBSA), oleamide (OA)
Short for substrate protection layer:
a polyester-urethane resin (PU) and a urethane phenoxy resin (U),
acrylic resin (A)
From table 1, it was confirmed that the adhesion of the adhesive tape was good and the adhesive paste residue after peeling was suppressed by forming the lubricant layer of 2-layer structure containing different lubricants.
The present application claims priority from japanese patent application No. 2021-124286, filed on 7/29 of 2021, the disclosure of which forms a part of the present application.
It must be understood that the terms and expressions used herein have been employed for the purpose of illustration and not of limitation, and there is no intention in the use of such terms and expressions of excluding any equivalents of the features shown and described or portions thereof, but it is recognized that various modifications are possible within the scope of the invention claimed.
Industrial applicability
The battery packaging material of the present invention can be suitably used as a casing material for a secondary battery for vehicles, stationary, notebook computers, mobile phones, cameras, and particularly for a lithium ion secondary battery for small-sized portable use.
Description of the reference numerals
1. Packaging material for 2 … battery
11 … Barrier layer
12 … adhesive layer 1
13 … substrate layer
14 … adhesive layer 2
15 … Heat-fusible resin layer
20 … lubricant layer
21 … lubricant layer 1
22 … lubricant layer 2
30 … substrate protective layer
Claims (9)
1. A packaging material for a battery, characterized in that the packaging material for a battery comprises a base layer, a heat-fusible resin layer, and a barrier layer disposed between the two layers, wherein the lubricant layer is provided as the outermost layer on the outer side of the base layer,
the lubricant layer is composed of 2 layers in which a 1 st lubricant layer on the substrate layer side and a 2 nd lubricant layer on the outer side are laminated, and the 1 st lubricant layer and the 2 nd lubricant layer are formed of different lubricants.
2. The packaging material for a battery according to claim 1, wherein the lubricant of the 1 st lubricant layer is bisamide, and the lubricant of the 2 nd lubricant layer is monoamide.
3. The packaging material for a battery according to claim 1 or 2, wherein a total amount of the lubricant of the 1 st lubricant layer and the lubricant of the 2 nd lubricant layer is 0.3mg/m 2 ～7mg/m 2 。
4. The battery packaging material according to any one of claims 1 to 3, wherein a base material protective layer is disposed between the base material layer and the lubricant layer.
5. The battery packaging material according to claim 4, wherein the base material protective layer is formed of a resin composition containing a resin component and solid fine particles, and has a surface gloss of 6.0GU or less.
6. The battery packaging material according to claim 4 or 5, wherein the resin component of the base material protective layer is at least 1 of an acrylic resin, an epoxy resin, a urethane resin, a polyolefin resin, a fluorine resin, and a phenoxy resin.
7. A method for producing a battery packaging material, characterized by comprising:
a base material layer laminating step of laminating a base material layer on one surface of the barrier layer;
a heat-fusible resin layer laminating step of laminating a heat-fusible resin layer on the other surface of the barrier layer;
a 1 st lubricant layer forming step of applying a 1 st lubricant to the surface of the base material layer and drying the same; and, a step of, in the first embodiment,
and a 2 nd lubricant layer forming step of forming a 2 nd lubricant layer formed of a 2 nd lubricant different from the 1 st lubricant on the 1 st lubricant layer.
8. The method for producing a packaging material for a battery according to claim 7, wherein,
in the step of forming the heat-fusible resin layer, the heat-fusible resin layer containing the lubricant of the 2 nd is laminated on the barrier layer,
The 2 nd lubricant layer forming step is performed by: the intermediate laminate obtained by performing the base material layer laminating step, the heat-fusible resin layer forming step, and the 1 st lubricant layer forming step is wound around a roll, cured in a state where the heat-fusible resin layer is brought into contact with the 1 st lubricant layer, and the 2 nd lubricant deposited on the surface of the heat-fusible resin layer is adhered to the surface of the 1 st lubricant layer.
9. The method for producing a packaging material for a battery according to claim 7, wherein the step of forming the 2 nd lubricant layer is performed by applying the 2 nd lubricant on the surface of the 1 st lubricant layer and drying the same.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2021124286 | 2021-07-29 | ||
| JP2021-124286 | 2021-07-29 | ||
| PCT/JP2022/028047 WO2023008254A1 (en) | 2021-07-29 | 2022-07-19 | Battery packaging material and manufacturing method therefor |
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| Publication Number | Publication Date |
|---|---|
| CN117730449A true CN117730449A (en) | 2024-03-19 |
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| CN202280051121.1A Pending CN117730449A (en) | 2021-07-29 | 2022-07-19 | Packaging material for battery and method for producing same |
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|---|---|
| JP (1) | JPWO2023008254A1 (en) |
| CN (1) | CN117730449A (en) |
| WO (1) | WO2023008254A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP6019812B2 (en) * | 2012-06-27 | 2016-11-02 | 大日本印刷株式会社 | Packaging materials for electrochemical cells |
| JP6222183B2 (en) * | 2015-07-31 | 2017-11-01 | 大日本印刷株式会社 | Battery packaging materials |
| JP6965872B2 (en) * | 2016-02-18 | 2021-11-10 | 凸版印刷株式会社 | Manufacturing method of exterior material for power storage device and exterior material for power storage device |
| JP6917255B2 (en) * | 2017-09-20 | 2021-08-11 | 昭和電工パッケージング株式会社 | Packaging material for molding, exterior case for power storage device and power storage device |
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2022
- 2022-07-19 CN CN202280051121.1A patent/CN117730449A/en active Pending
- 2022-07-19 JP JP2023538455A patent/JPWO2023008254A1/ja active Pending
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