CN117013160A - Packaging material for battery - Google Patents
Packaging material for battery Download PDFInfo
- Publication number
- CN117013160A CN117013160A CN202310408035.8A CN202310408035A CN117013160A CN 117013160 A CN117013160 A CN 117013160A CN 202310408035 A CN202310408035 A CN 202310408035A CN 117013160 A CN117013160 A CN 117013160A
- Authority
- CN
- China
- Prior art keywords
- layer
- resin
- fine particles
- base material
- packaging material
- 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 89
- 229920005989 resin Polymers 0.000 claims abstract description 231
- 239000011347 resin Substances 0.000 claims abstract description 231
- 239000010410 layer Substances 0.000 claims abstract description 159
- 239000000463 material Substances 0.000 claims abstract description 114
- 239000002245 particle Substances 0.000 claims abstract description 101
- 239000007787 solid Substances 0.000 claims abstract description 94
- 239000011241 protective layer Substances 0.000 claims abstract description 91
- 239000011230 binding agent Substances 0.000 claims abstract description 49
- 230000009477 glass transition Effects 0.000 claims abstract description 31
- 230000004888 barrier function Effects 0.000 claims abstract description 30
- 239000010954 inorganic particle Substances 0.000 claims abstract description 12
- 239000010419 fine particle Substances 0.000 claims description 183
- -1 polyethylene Polymers 0.000 claims description 41
- 239000012790 adhesive layer Substances 0.000 claims description 37
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 24
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 24
- 239000000758 substrate Substances 0.000 claims description 22
- 239000012508 resin bead Substances 0.000 claims description 19
- 229920000178 Acrylic resin Polymers 0.000 claims description 15
- 239000004925 Acrylic resin Substances 0.000 claims description 15
- 239000003086 colorant Substances 0.000 claims description 15
- 239000011324 bead Substances 0.000 claims description 13
- 239000000377 silicon dioxide Substances 0.000 claims description 12
- 239000004698 Polyethylene Substances 0.000 claims description 11
- 229920000573 polyethylene Polymers 0.000 claims description 11
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 10
- 229920002803 thermoplastic polyurethane Polymers 0.000 claims description 10
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 9
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 9
- 229920013716 polyethylene resin Polymers 0.000 claims description 7
- 229920005672 polyolefin resin Polymers 0.000 claims description 7
- 229920005990 polystyrene resin Polymers 0.000 claims description 7
- 239000004743 Polypropylene Substances 0.000 claims description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 6
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims description 6
- 229920001155 polypropylene Polymers 0.000 claims description 6
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 5
- 238000004040 coloring Methods 0.000 claims description 5
- 229920006287 phenoxy resin Polymers 0.000 claims description 4
- 239000013034 phenoxy resin Substances 0.000 claims description 4
- 239000005995 Aluminium silicate Substances 0.000 claims description 3
- 235000012211 aluminium silicate Nutrition 0.000 claims description 3
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims description 3
- 239000000292 calcium oxide Substances 0.000 claims description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 3
- 239000000378 calcium silicate Substances 0.000 claims description 3
- 229910052918 calcium silicate Inorganic materials 0.000 claims description 3
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 claims description 3
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 3
- 229920001225 polyester resin Polymers 0.000 claims description 3
- 239000004645 polyester resin Substances 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 abstract description 88
- 230000001070 adhesive effect Effects 0.000 abstract description 88
- 230000001681 protective effect Effects 0.000 abstract description 51
- 239000011342 resin composition Substances 0.000 description 66
- 239000008199 coating composition Substances 0.000 description 36
- 239000003795 chemical substances by application Substances 0.000 description 34
- 238000000034 method Methods 0.000 description 18
- 239000002904 solvent Substances 0.000 description 16
- 239000002390 adhesive tape Substances 0.000 description 14
- 238000012360 testing method Methods 0.000 description 14
- 230000032683 aging Effects 0.000 description 13
- 238000000465 moulding Methods 0.000 description 12
- 239000011888 foil Substances 0.000 description 11
- 239000007788 liquid Substances 0.000 description 11
- 229920005862 polyol Polymers 0.000 description 11
- 239000000314 lubricant Substances 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 9
- 239000000126 substance Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 7
- 150000003077 polyols Chemical class 0.000 description 7
- 239000005057 Hexamethylene diisocyanate Substances 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 description 6
- 238000007789 sealing Methods 0.000 description 6
- 229920001577 copolymer Polymers 0.000 description 5
- 229920005906 polyester polyol Polymers 0.000 description 5
- 239000004814 polyurethane Substances 0.000 description 5
- 238000011282 treatment Methods 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 4
- 239000006229 carbon black Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000003792 electrolyte Substances 0.000 description 4
- 239000012948 isocyanate Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- FTQWRYSLUYAIRQ-UHFFFAOYSA-N n-[(octadecanoylamino)methyl]octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(=O)NCNC(=O)CCCCCCCCCCCCCCCCC FTQWRYSLUYAIRQ-UHFFFAOYSA-N 0.000 description 4
- 229920006284 nylon film Polymers 0.000 description 4
- 229920002635 polyurethane Polymers 0.000 description 4
- 238000010248 power generation Methods 0.000 description 4
- 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 4
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N Acrylic acid Chemical compound OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 3
- 239000004952 Polyamide Substances 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 description 3
- 239000004840 adhesive resin Substances 0.000 description 3
- 229920006223 adhesive resin Polymers 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 150000001408 amides Chemical class 0.000 description 3
- 238000013329 compounding Methods 0.000 description 3
- 150000002193 fatty amides Chemical class 0.000 description 3
- 239000003292 glue Substances 0.000 description 3
- 229920006015 heat resistant resin Polymers 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000000049 pigment Substances 0.000 description 3
- 229920002647 polyamide Polymers 0.000 description 3
- 229920000728 polyester Polymers 0.000 description 3
- 229920005604 random copolymer Polymers 0.000 description 3
- 239000004094 surface-active agent Substances 0.000 description 3
- RTTZISZSHSCFRH-UHFFFAOYSA-N 1,3-bis(isocyanatomethyl)benzene Chemical compound O=C=NCC1=CC=CC(CN=C=O)=C1 RTTZISZSHSCFRH-UHFFFAOYSA-N 0.000 description 2
- 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
- UAUDZVJPLUQNMU-UHFFFAOYSA-N Erucasaeureamid Natural products CCCCCCCCC=CCCCCCCCCCCCC(N)=O UAUDZVJPLUQNMU-UHFFFAOYSA-N 0.000 description 2
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-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
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- AYJRCSIUFZENHW-UHFFFAOYSA-L barium carbonate Chemical compound [Ba+2].[O-]C([O-])=O AYJRCSIUFZENHW-UHFFFAOYSA-L 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000007739 conversion coating Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 150000004985 diamines Chemical class 0.000 description 2
- ILRSCQWREDREME-UHFFFAOYSA-N dodecanamide Chemical compound CCCCCCCCCCCC(N)=O ILRSCQWREDREME-UHFFFAOYSA-N 0.000 description 2
- 238000009820 dry lamination Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- UAUDZVJPLUQNMU-KTKRTIGZSA-N erucamide Chemical compound CCCCCCCC\C=C/CCCCCCCCCCCC(N)=O UAUDZVJPLUQNMU-KTKRTIGZSA-N 0.000 description 2
- 230000014509 gene expression Effects 0.000 description 2
- 150000002513 isocyanates Chemical class 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- LYRFLYHAGKPMFH-UHFFFAOYSA-N octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(N)=O LYRFLYHAGKPMFH-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
- 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
- 239000002356 single layer Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 230000035882 stress Effects 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- 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
- 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 1
- QRIKMBDKRJXWBV-CLFAGFIQSA-N (z)-n-[6-[[(z)-octadec-9-enoyl]amino]hexyl]octadec-9-enamide Chemical compound CCCCCCCC\C=C/CCCCCCCC(=O)NCCCCCCNC(=O)CCCCCCC\C=C/CCCCCCCC QRIKMBDKRJXWBV-CLFAGFIQSA-N 0.000 description 1
- FUSNPOOETKRESL-ZPHPHTNESA-N (z)-n-octadecyldocos-13-enamide Chemical compound CCCCCCCCCCCCCCCCCCNC(=O)CCCCCCCCCCC\C=C/CCCCCCCC FUSNPOOETKRESL-ZPHPHTNESA-N 0.000 description 1
- SHWXDBCYQQBLFD-UHFFFAOYSA-N 1-(aziridin-1-yl)-2,2-dihydroxyoctadecan-1-one Chemical compound CCCCCCCCCCCCCCCCC(O)(O)C(=O)N1CC1 SHWXDBCYQQBLFD-UHFFFAOYSA-N 0.000 description 1
- VYWRBUBXZALATG-UHFFFAOYSA-N 2-hydroxyoctadecanamide Chemical compound CCCCCCCCCCCCCCCCC(O)C(N)=O VYWRBUBXZALATG-UHFFFAOYSA-N 0.000 description 1
- DXTUZIPRVVBDNP-UHFFFAOYSA-N 3-n-octadecylbenzene-1,3-dicarboxamide Chemical compound CCCCCCCCCCCCCCCCCCNC(=O)C1=CC=CC(C(N)=O)=C1 DXTUZIPRVVBDNP-UHFFFAOYSA-N 0.000 description 1
- 229910018084 Al-Fe Inorganic materials 0.000 description 1
- 229910018192 Al—Fe Inorganic materials 0.000 description 1
- 229920002799 BoPET Polymers 0.000 description 1
- 230000005653 Brownian motion process Effects 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
- ORAWFNKFUWGRJG-UHFFFAOYSA-N Docosanamide Chemical compound CCCCCCCCCCCCCCCCCCCCCC(N)=O ORAWFNKFUWGRJG-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
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 229920002302 Nylon 6,6 Polymers 0.000 description 1
- 239000004721 Polyphenylene oxide 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
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 239000003945 anionic surfactant Substances 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 125000000751 azo group Chemical group [*]N=N[*] 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229920001400 block copolymer Polymers 0.000 description 1
- 238000005537 brownian motion Methods 0.000 description 1
- 239000003093 cationic surfactant Substances 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
- 238000004132 cross linking Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- LJZKUDYOSCNJPU-UHFFFAOYSA-N dotetracontanediamide Chemical compound NC(=O)CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC(N)=O LJZKUDYOSCNJPU-UHFFFAOYSA-N 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- JXZAVFLAOZYIOR-UHFFFAOYSA-N ethyl octadecanoate;octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(N)=O.CCCCCCCCCCCCCCCCCC(=O)OCC JXZAVFLAOZYIOR-UHFFFAOYSA-N 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000012775 heat-sealing material Substances 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-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
- 238000010030 laminating Methods 0.000 description 1
- 229940116335 lauramide Drugs 0.000 description 1
- 239000011976 maleic acid Substances 0.000 description 1
- XMYQHJDBLRZMLW-UHFFFAOYSA-N methanolamine Chemical compound NCO XMYQHJDBLRZMLW-UHFFFAOYSA-N 0.000 description 1
- 239000011859 microparticle Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- YORJEABCJCAFPB-UHFFFAOYSA-N n,n'-dioctadecyldecanediamide Chemical compound CCCCCCCCCCCCCCCCCCNC(=O)CCCCCCCCC(=O)NCCCCCCCCCCCCCCCCCC YORJEABCJCAFPB-UHFFFAOYSA-N 0.000 description 1
- JHOKTNSTUVKGJC-UHFFFAOYSA-N n-(hydroxymethyl)octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(=O)NCO JHOKTNSTUVKGJC-UHFFFAOYSA-N 0.000 description 1
- PECBPCUKEFYARY-ZPHPHTNESA-N n-[(z)-octadec-9-enyl]octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(=O)NCCCCCCCC\C=C/CCCCCCCC PECBPCUKEFYARY-ZPHPHTNESA-N 0.000 description 1
- KYMPOPAPQCIHEG-UHFFFAOYSA-N n-[2-(decanoylamino)ethyl]decanamide Chemical compound CCCCCCCCCC(=O)NCCNC(=O)CCCCCCCCC KYMPOPAPQCIHEG-UHFFFAOYSA-N 0.000 description 1
- WNCFYFLYHFIWIL-UHFFFAOYSA-N n-[2-(docosanoylamino)ethyl]docosanamide Chemical compound CCCCCCCCCCCCCCCCCCCCCC(=O)NCCNC(=O)CCCCCCCCCCCCCCCCCCCCC WNCFYFLYHFIWIL-UHFFFAOYSA-N 0.000 description 1
- HETBCUMLBCUVKC-UHFFFAOYSA-N n-[2-(dodecanoylamino)ethyl]dodecanamide Chemical compound CCCCCCCCCCCC(=O)NCCNC(=O)CCCCCCCCCCC HETBCUMLBCUVKC-UHFFFAOYSA-N 0.000 description 1
- RKISUIUJZGSLEV-UHFFFAOYSA-N n-[2-(octadecanoylamino)ethyl]octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(=O)NCCNC(=O)CCCCCCCCCCCCCCCCC RKISUIUJZGSLEV-UHFFFAOYSA-N 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
- DJWFNQUDPJTSAD-UHFFFAOYSA-N n-octadecyloctadecanamide Chemical compound CCCCCCCCCCCCCCCCCCNC(=O)CCCCCCCCCCCCCCCCC DJWFNQUDPJTSAD-UHFFFAOYSA-N 0.000 description 1
- 239000002736 nonionic surfactant Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- FATBGEAMYMYZAF-KTKRTIGZSA-N oleamide Chemical compound CCCCCCCC\C=C/CCCCCCCC(N)=O FATBGEAMYMYZAF-KTKRTIGZSA-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
- WOQDVIVTFCTQCE-UHFFFAOYSA-N pentacontanediamide Chemical compound NC(=O)CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC(N)=O WOQDVIVTFCTQCE-UHFFFAOYSA-N 0.000 description 1
- IEQIEDJGQAUEQZ-UHFFFAOYSA-N phthalocyanine Chemical compound N1C(N=C2C3=CC=CC=C3C(N=C3C4=CC=CC=C4C(=N4)N3)=N2)=C(C=CC=C2)C2=C1N=C1C2=CC=CC=C2C4=N1 IEQIEDJGQAUEQZ-UHFFFAOYSA-N 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000004584 polyacrylic acid Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 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
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 150000004671 saturated fatty acids Chemical class 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 229940037312 stearamide Drugs 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 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
- 230000007704 transition Effects 0.000 description 1
- 150000004670 unsaturated fatty acids Chemical class 0.000 description 1
- 235000021122 unsaturated fatty acids Nutrition 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Classifications
-
- 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
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- 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
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Laminated Bodies (AREA)
Abstract
The present invention relates to a packaging material for a battery. The invention provides a battery packaging material with a protective tape which is not peeled off unintentionally and can be peeled off without leaving adhesive of the tape. The solving means is as follows: a packaging material (1) for a battery, comprising a base material layer (13), a heat-fusible resin layer (15), a barrier layer (11) disposed between the two layers, and a base material protective layer (20) as an outermost layer outside the base material layer (13), wherein the base material protective layer (20) comprises a binder resin (21), soft resin particles having a glass transition temperature Tg of less than 30 ℃, hard resin particles having a glass transition temperature Tg of 30 ℃ or more, and inorganic particles as solid particles (22), and the total content of the solid particles (22) in the base material protective layer (20) is 30 to 50 mass%.
Description
Technical Field
The present invention relates to a packaging material for a power storage device such as a battery, a capacitor, an electric vehicle, a wind power generation device, a solar power generation device, or a battery or a capacitor used for a portable device such as a smart phone or a tablet personal computer.
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 the occurrence of such an appearance defect in the manufacturing process, a protective tape (protective tape) is attached to the packaging material in advance, and the protective tape is peeled off after the manufacturing process is completed. The protective tape needs to have adhesion that does not peel off in the manufacturing process, but if firmly bonded, the adhesive of the protective tape may remain in the packaging material after peeling off. In the packaging material obtained by laminating a colored layer containing carbon black on the surface, the colored layer may be peeled off together with the protective tape.
For such problems associated with the protective tape, conventionally, the adhesive force of the protective tape has been used for the residual adhesive after the peeling of the protective tape (see patent document 1). In addition, a technique of reinforcing a colored layer against peeling of the colored layer has been proposed (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 residual glue in the packaging material. In addition, the technique of patent document 2 cannot solve the problem of the residual glue in the packaging material in which the outermost layer is not a colored layer containing carbon black.
The preferred embodiments of the present invention have been made in view of the above-mentioned and/or other problems occurring in the related art. Preferred embodiments of the present invention can be significantly superior to existing methods and/or apparatus.
Means for solving the problems
In view of the above background art, an object of the present invention is to provide a surface of a battery packaging material with a reverse property of protecting an adhesive tape from being peeled off unintentionally and peeling off without leaving an adhesive of the adhesive tape; and preventing deterioration of appearance due to residual adhesive of the tape.
Other objects and advantages of the present invention will be apparent from the following preferred embodiments.
That is, the present invention has the following configurations [1] to [11 ].
[1] A packaging material for a battery comprising a base material layer, a heat-fusible resin layer, a barrier layer disposed between the two layers, and a base material protective layer as an outermost layer on the outer side of the base material layer,
The substrate protective layer comprises a binder resin, soft resin particles having a glass transition temperature Tg of less than 30 ℃ as solid particles, hard resin particles having a glass transition temperature Tg of 30 ℃ or more, and inorganic particles,
the total content of the solid particles in the substrate protective layer is 30 to 50 mass%.
[2] The battery packaging material according to the aforementioned item 1, wherein the average particle diameter of the soft resin fine particles is 5 μm to 20 μm, the average particle diameter of the hard resin fine particles is 1 μm to 15 μm, and the average particle diameter of the inorganic fine particles is 1 μm to 10 μm.
[3] The battery packaging material according to the item 1 or 2, wherein the content of the soft resin fine particles in the base material protective layer is 1 to 10% by mass, the content of the hard resin fine particles is 1 to 20% by mass, and the content of the inorganic fine particles is 20 to 40% by mass.
[4] The battery packaging material according to any one of the above 1 to 3, wherein the soft resin fine particles are at least 1 selected from the group consisting of polyethylene wax, polypropylene wax, polyethylene resin beads and urethane resin beads.
[5] The battery packaging material according to any one of the above 1 to 4, wherein the hard resin fine particles are at least 1 kind selected from polytetrafluoroethylene wax, acrylic resin beads, polystyrene resin beads, and fluororesin beads.
[6] The battery pack according to any one of the preceding claims 1 to 5, wherein the inorganic fine particles are at least 1 selected from the group consisting of silica, alumina, kaolin, calcium oxide, calcium carbonate, calcium sulfate, barium sulfate, and calcium silicate.
[7] The battery packaging material according to any one of the preceding claims 1 to 6, wherein the binder resin of the base material protective layer is at least 1 selected from the group consisting of an acrylic resin, a urethane resin, a polyolefin resin, a phenoxy resin, a polyester resin, and a tetrafluoro-olefin resin.
[8] The battery packaging material according to any one of the preceding claims 1 to 7, wherein the base material protective layer and/or the base material layer contains a colorant.
[9] The battery packaging material according to any one of the preceding claims 1 to 7, wherein the barrier layer and the base material layer are laminated via an adhesive layer, and at least one of the base material protective layer, the base material layer, and the adhesive layer contains a colorant.
[10] The battery packaging material according to any one of the preceding claims 1 to 7, wherein a colored layer is provided between the base material protective layer and the base material layer and/or between the base material layer and the barrier layer.
[11] The battery packaging material according to any one of the preceding claims 1 to 7, wherein the barrier layer and the base material layer are laminated via an adhesive layer, and a colored layer is provided between at least one of the base material protective layer and the base material layer, between the base material layer and the adhesive layer, and between the adhesive layer and the barrier layer.
ADVANTAGEOUS EFFECTS OF INVENTION
The battery packaging material according to item [1] above, wherein the base material protective layer comprises a binder resin, and soft resin fine particles, hard resin fine particles, and inorganic fine particles having different hardness as solid fine particles, and therefore the surface thereof is formed of a portion where the binder resin is present and a portion where 3 kinds of solid fine particles having different hardness are present. The part where the binder resin exists is easy to contact with the adhesive of the protective tape, the bonding force is strong, the part where the solid particles exist is difficult to contact with the adhesive, and the bonding force is weak. Further, since there are 3 types of solid particles having different hardness, the strength of the adhesive force varies depending on the solid particles. Further, since the total content of the solid fine particles is set to 30 to 50 mass%, the area of the portion having strong adhesion and the area of the portion having weak adhesion can be balanced, the protective tape can maintain adhesion when necessary, and can be easily peeled off after use, and the residual adhesive after peeling is less likely to occur.
When the battery packaging material is heated and compressed in the curing step of battery production, the soft resin fine particles and the hard resin fine particles soften according to the glass transition temperature Tg thereof, deform into flat shapes, and the protective tape becomes highly adhesive and is less likely to peel off. On the other hand, the inorganic fine particles are extremely hard and hardly deformed, and therefore, the easily releasable effect is maintained, the soft resin fine particles and the hard resin fine particles are prevented from being significantly deformed, and the soft resin fine particles and the hard resin fine particles are prevented from being buried in the binder resin. By using 3 kinds of solid particles having different hardness, the increase in adhesion due to heat and pressure is suppressed, and the peelability can be maintained.
The battery packaging material according to item [2], wherein the average particle size of 3 kinds of solid particles is defined, and therefore, the timing of peeling of the adhesive is shifted, cohesive failure of the adhesive is less likely to occur, and adhesive residue is less likely to occur.
The battery packaging material according to item [3], wherein the content of 3 kinds of solid particles is defined and a large amount of inorganic particles are incorporated, so that the effect of preventing the adhesive of the protective tape from contacting the binder resin is large when the protective tape is heated and pressurized, and the occurrence of residual adhesive can be suppressed.
The battery packaging material according to item [4], wherein the selected soft resin particles soften at a temperature at which they are heated and pressurized, and are easily deformed, so that an appropriate peel strength can be obtained for the adhesive of the protective tape.
According to the battery packaging material of item [5], the selected hard resin particles undergo slight deformation under the synergistic effect of temperature and pressure at the time of heating and pressurizing, and therefore the contact area with the adhesive of the protective tape is slightly increased, contributing to the peel strength.
The battery packaging material according to item [6], wherein the selected inorganic fine particles are not easily deformed when heated and pressurized, and therefore, an appropriate peel strength from the adhesive of the protective tape can be obtained.
The battery packaging material according to item [7], wherein the adhesive resin is selected to have good adhesion compatibility with the adhesive of the protective tape, so that the adhesive force between the portion where the adhesive resin is present and the portion where the solid particles are present can be made different.
The battery packaging material of [8] [9] [10] [11] is colored with a colorant, whereby the visibility of the adhesive residue portion of the protective tape is improved and the determination of the adhesive residue is facilitated. In addition, designability can be imparted.
Drawings
Fig. 1 is a cross-sectional view showing an example of a battery packaging material according to the present invention.
Fig. 2 is a cross-sectional view showing a state of the battery packaging material to which the protective tape is attached when heated and pressurized.
Fig. 3 is a cross-sectional view showing another example of the battery packaging material of the present invention.
Detailed Description
Fig. 1 shows an embodiment 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 elements, and a repetitive description thereof will be omitted.
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 base material protective layer is referred to as the outer side, and the direction of the heat-fusible resin layer is referred to as the inner side.
[ embodiment 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 through a 1 st adhesive layer 12, a heat-fusible resin layer 15 is bonded to the other surface through a 2 nd adhesive layer 14, and a base material protective layer 20 is laminated on the base material layer 13.
(use of protective tape in Battery manufacturing Process)
The battery case is produced by forming the battery packaging material 1 into a convex portion by three-dimensional molding and disposing the heat-fusible resin layers 15 so as to face each other. And filling the battery element and electrolyte into the shell, heat-sealing the periphery of the convex part, curing, and exhausting to finish the manufacture of the battery. In the step from the start of molding of the battery packaging material 1 to the start of evacuation, a protective tape is attached to the top surface of the convex portion and the non-heat-sealed portion, and maintenance and evacuation are performed while maintaining the attached state. The curing is performed by heating to 50 to 80 ℃ and pressurizing to 0.3 to Pa0.7MPa in the lamination direction for 1 to 24 hours. Fig. 2 shows a state of the battery packaging material 1 to which the protective tape 50 is attached when heated and pressurized. The protective tape 50 is a sheet having an adhesive 52 applied to one surface of a base material 51.
The battery after maintenance and evacuation is shipped by peeling the protective tape 50.
Therefore, the following opposite characteristics are required for the outer side surface of the battery packaging material 1: the attached protective tape 50 must be firmly attached without unintentional peeling, but if the protective tape 50 is not required any more, the adhesive 52 is not left and the attached surface can be thoroughly peeled without damaging.
(protective layer for substrate)
The base material protective layer 20 is a layer that imparts good slidability to the surface of the battery packaging material to improve moldability, and imparts excellent chemical resistance, solvent resistance, and abrasion resistance.
The base material protective layer 20 is a cured film of a resin composition containing a binder resin 21 and 3 kinds of solid particles 22 described later. A part of the solid particles 22 in the cured film is buried in the binder resin 21, and a part thereof protrudes outward from the surface to form protruding portions 30. Therefore, the surface of the base material protective layer 20 is formed with not only extremely fine irregularities by the binder resin 21 but also large irregularities by the protruding portions 30.
On the surface of the aforementioned base material protective layer 20, the protruding portion 30 protrudes high, and therefore, the adhesive of the protective tape is in contact with the top portion of the protruding portion 30, and is not easily in contact with the inclined portion around it. On the other hand, the portions other than the protruding portion 30 are smoother than the protruding portion 30, so the adhesive is easily contacted. Since the contact amount of the adhesive is small in the portion where the adhesive is not easily contacted, the adhesive force (adhesion) becomes weak, and since the contact amount of the adhesive is large in the portion where the adhesive is easily contacted, the adhesive force becomes strong. As described above, a state in which a portion having a large contact amount of the adhesive and a portion having a small contact amount of the adhesive are finely mixed and present is generated on the surface of the base material protective layer 20, and thus, the adhesive force can be maintained when necessary, and the adhesive can be easily peeled off after use, and the residual adhesive after peeling is less likely to be generated.
The balance between the adhesive force and the easy peelability after use of the protective tape when necessary is affected by the composition of the resin composition constituting the base material protective layer 20 and the characteristics of the solid particles used, and by defining them, an appropriate balance can be obtained.
The resin composition constituting the base material protective layer 20 includes 3 kinds of binder resin 21, and soft resin fine particles, hard resin fine particles, and inorganic fine particles as solid fine particles 22. In the present invention, the hardness of the resin fine particles is discriminated based on the glass transition temperature Tg, the resin fine particles having a glass transition temperature Tg lower than 30 ℃ are defined as soft resin fine particles, and the resin fine particles having a glass transition temperature Tg of 30 ℃ or higher are defined as hard resin fine particles. The glass transition temperature Tg is a temperature at which molecular chains of the resin particles start microscopic brownian motion, and is represented by an endothermic start temperature (onset point) based on Differential Scanning Calorimeter (DSC) analysis. The glass transition temperature Tg can be measured by JIS K7121-1987 "method for measuring transition temperature of plastics".
The hardness of the 3 kinds of solid particles is different, the soft resin particles are the most soft, and the inorganic particles are the most hard. In addition, the hardness of each of these 3 solid particles is different from the hardness of the cured binder resin 21. Since the projections 30 generated by the solid particles 22 are formed on the surface of the base material protective layer 20, there are portions of different hardness generated by the resin binder 21 and the 3 kinds of solid particles 22 on the surface of the base material protective layer 20. The release easiness of the adhesive of the protective tape varies with the hardness of the adhering surface, and the portion where the binder resin is present is likely to be in contact with the adhesive of the protective tape, so that the adhesive strength is high, the portion where the solid particles are present is less likely to be in contact with the adhesive, and the adhesive strength is low. Further, since there are 3 types of solid particles having different hardness, a difference in strength of adhesion occurs depending on the solid particles. Further, when the protective tape is peeled from the base material protective layer 20 having the above-described surface, the timing of peeling the adhesive is shifted at the portions having different hardness, and the force applied to the adhesive is dispersed, so that cohesive failure of the adhesive is less likely to occur, and the adhesive residue is less likely to occur.
In the battery manufacturing process, as shown in fig. 2, curing by heating and pressurizing after heat sealing is performed in a state where the protective tape 50 is attached to the battery packaging material 1. When the battery packaging material 1 is pressurized in the stacking direction while being heated, the 3 kinds of solid particles change in accordance with the characteristics. The soft resin particles 22a having a glass transition temperature Tg of less than 30 ℃ soften, deform into a flat shape, and increase the contact area with the adhesive 52, thereby improving the adhesion of the protective tape 50 and making it difficult to peel off. The hard resin particles 22b having a glass transition temperature Tg of 30 ℃ or higher are softened, but are deformed to a smaller extent than the soft resin particles 22a, so that the effect of improving the adhesion is smaller than that of the soft resin particles 22a, as the contact area with the adhesive 52 increases correspondingly. The inorganic particles 22c are very hard and hardly deformed. Therefore, the contact area with the adhesive 52 is not changed, and the easily peeling effect due to the protruding particles (protruding portions 30) is maintained. The inorganic fine particles 22c not only prevent the soft resin fine particles 22a and the hard resin fine particles 22b from being significantly deformed, but also suppress the soft resin fine particles 22a and the hard resin fine particles 22b from being buried in the binder resin 21. When the battery packaging material 1 is heated and pressurized, the adhesion force of the protective tape 50 is improved, but the use of 3 kinds of solid particles having different hardness suppresses the increase in adhesion force due to the heating and pressurization, and can maintain the peelability.
The total content of the solid fine particles in the base material protective layer 20 is 30 to 50% by mass. When the total content of the solid particles is less than 30 mass%, the protruding portion 30 on the surface of the base material protective layer 20 becomes small, and therefore the adhesiveness of the protective tape becomes high, the peel strength becomes high, and the occurrence of the adhesive residue becomes easy. On the other hand, when the total content of the solid particles is more than 50 mass%, the residual adhesive becomes less likely to occur, but on the other hand, the adhesion of the protective tape is reduced, so that unintended peeling during handling becomes less likely to occur. The total content is particularly preferably 35 to 45 mass%.
The preferable content ratio of each fine particle in the substrate protective layer 20 is: the soft resin particles are 1 to 10% by mass, the hard resin particles are 1 to 20% by mass, and the inorganic particles are 20 to 40% by mass. The content of each microparticle is particularly preferably as follows: 2 to 8 mass% of soft resin particles, 3 to 12 mass% of hard resin particles, and 25 to 35 mass% of inorganic particles. The relation of the content of 3 kinds of solid particles is preferably that the inorganic particles are larger than the sum of the soft resin particles and the hard resin particles. By adding a large amount of inorganic fine particles, the effect of preventing the adhesive of the protective tape from contacting the binder resin is large when the adhesive tape is heated and pressurized, and the occurrence of residual adhesive can be suppressed. The total content of the solid particles and the content of each solid particle are ratios relative to the sum of the binder resin and the solid particles, and do not include a solvent used for viscosity adjustment at the time of coating.
The average particle diameter of the soft resin fine particles is preferably 5 to 20. Mu.m, the average particle diameter of the hard resin fine particles is preferably 1 to 15. Mu.m, and the average particle diameter of the inorganic fine particles is preferably 1 to 10. Mu.m. Particularly preferably, the average particle diameter is 6 μm to 18 μm for the soft resin particles, 3 μm to 12 μm for the hard resin particles, and 1 μm to 3 μm for the inorganic particles. Since the contact area with the adhesive of the protective tape is different and the adhesion force is different depending on the particle size of the solid particles, when the average particle size of the 3 kinds of solid particles is within the above range, the timing of peeling the adhesive is shifted, cohesive failure of the adhesive is less likely to occur, and adhesive residue is less likely to occur.
The average particle diameter of the 3 kinds of solid particles preferably satisfies the relationship of soft resin particles > hard resin particles > inorganic particles. As described above, when the soft resin fine particles and the hard resin fine particles are deformed into flat shapes by the heat and pressure applied to perform battery maintenance, the contact area with the adhesive of the protective tape is increased, and the adhesive force is improved, and the inorganic fine particles are not deformed, whereby the effect of suppressing the deformation of 2 kinds of resin fine particles is obtained, and when the average particle diameters of 3 kinds of solid fine particles satisfy the above-mentioned relation, the balance between the adhesive force and the easy peelability is improved, and the occurrence of the residual adhesive is suppressed.
The solid fine particles may contain at least 1 of the soft resin fine particles, the hard resin fine particles, and the inorganic fine particles, or may contain 2 or more of the 1 kinds. The following examples are examples of fine particles belonging to each category.
Examples of the soft resin fine particles, that is, resin fine particles having a glass transition temperature Tg of less than 30 ℃, include polyethylene wax, polypropylene wax, polyethylene resin beads, and urethane resin beads. These particles can give an appropriate peel strength with respect to the adhesive of the protective tape according to their glass transition temperature Tg. In the soft resin fine particles, the polyethylene wax and the polyethylene resin beads have low glass transition temperature Tg and melting point, and the softening point of the polyethylene is 85 to 120 ℃, so that the soft resin fine particles soften in the vicinity of the temperature (50 to 80 ℃) of the heating and pressurizing step during curing, and are easily deformed, and thus, the peel strength with the adhesive of the protective tape is easily improved, which is recommended from the viewpoint.
Examples of the hard resin fine particles, that is, resin fine particles having a glass transition temperature Tg of 30 ℃ or higher, include polytetrafluoroethylene wax, acrylic resin beads, polystyrene resin beads, and fluororesin beads. The glass transition temperatures Tg of these fine particles are all around 100 ℃, and they are not easily softened at the temperature (50 to 80 ℃) of the heating and pressurizing step for curing after the protective tape is attached, but undergo a synergistic effect with pressure to slightly deform, and the contact area with the adhesive of the protective tape is slightly increased, contributing to the peel strength.
Among the hard resin fine particles, polytetrafluoroethylene wax is preferably used because it has the chemical resistance, and when electrolyte resistance is required for the protective layer of the substrate, such wax is preferably used.
Examples of the inorganic fine particles include silica, alumina, kaolin, calcium oxide, calcium carbonate, calcium sulfate, barium sulfate, and calcium silicate. The inorganic fine particles are harder than the soft resin fine particles and the hard resin fine particles, and are less likely to deform in the heating and pressurizing step, and an appropriate peel strength from the adhesive of the protective tape can be obtained. Among these inorganic fine particles, silica is recommended from the viewpoints of easy obtaining of fine particles having a desired average particle diameter and easy dispersion into various binder resins, because the average particle diameter is small and the grade is complete.
As the binder resin 21, at least 1 resin selected from the group consisting of acrylic resins, urethane resins, polyolefin resins, phenoxy resins, and polyester resins is preferably used. Since these resins have good adhesion suitability to the adhesive of the protective tape, the adhesion between the portion where the binder resin is present and the portion where the solid particles are present can be made different. In addition, these resins have high chemical resistance and solvent resistance, and therefore, the falling off of solid particles due to deterioration of the resins and the like is less likely to occur. Among these, particularly preferred resins are urethane resins, polyester urethane resins, and urethane phenoxy resins.
The binder resin 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 according to the main agent resin. Examples of the curing agent include isocyanate compounds such as Hexamethylene Diisocyanate (HDI), isophorone diisocyanate (IPDI), toluene Diisocyanate (TDI), diphenylmethane diisocyanate (MDI), and m-Xylylene Diisocyanate (XDI), and modified products of these isocyanate compounds.
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. In addition, when it is more than 30 parts by mass, the base material protective layer 20 becomes hard, and the moldability may be lowered.
In addition, a lubricant and/or a surfactant may be added to the base material protective layer 20 in addition to the binder resin 21 and the solid particles 22. The lubricant and the surfactant have an effect of reducing the adhesive force of the adhesive of the protective tape, and they are deposited on the surface of the base material protective layer 20, whereby the peeling of the protective tape becomes good, and the occurrence of the adhesive residue is less likely to occur.
Examples of the lubricant include the following various amides.
Examples of the saturated fatty amide include lauramide, palmitoamide, stearamide, behenamide and hydroxystearamide.
Examples of the unsaturated fatty amide include oleamide and erucamide.
Examples of the substituted amide include N-oleyl palmitoamide, N-stearyl stearamide, N-stearyl oleamide, N-oleyl stearamide, and N-stearyl erucamide.
As the methylol amide, methylol stearamide is exemplified.
Examples of the saturated fatty acid bisamide include methylene bis-stearamide, ethylene bis-decanoamide, ethylene bis-lauramide, ethylene bis-stearamide, ethylene bis-hydroxystearamide, ethylene bis-behenamide, hexamethylenebis-stearamide, hexamethylenebis-behenamide, hexamethylenehydroxystearamide, N '-distearyladipamide, and N, N' -distearylsebacamide.
Examples of the unsaturated fatty acid bisamide include ethylene bisoleamide, ethylene biserucamide, hexamethylene bisoleamide, N '-dioleyladipamide, and N, N' -dioleyladecdiamide.
The fatty acid ester amide may be stearamide ethyl stearate.
As the aromatic bisamide, there may be mentioned m-xylylene bisstearamide and m-xylylene bishydroxy hardFatty amide (m-gasket, japanese), N'Two (II)Stearyl isophthalamide.
Examples of the surfactant include anionic surfactants, cationic surfactants, and nonionic surfactants.
The thickness of the base material protective layer 20 is preferably 1 μm to 12. Mu.m, and particularly preferably 2 μm to 10. Mu.m.
In the battery packaging material 1, preferred materials for the layers other than the base material protective 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. Among them, aluminum foil can be preferably used as the barrier layer 11. In particular, when an Al-Fe alloy foil containing 0.7 to 1.7 mass% of Fe is used, excellent strength and ductility are obtained, and good formability is obtained. The thickness of the barrier layer 11 is preferably 20 μm to 100 μm. By the thickness of 20 μm or more, pinholes can be prevented from being generated during rolling when a metal foil is manufactured, and by the thickness of 100 μm or less, stress during molding such as bulge molding and drawing can be reduced, and moldability can be improved. The thickness of the barrier layer 11 is particularly preferably 30 μm to 80 μm.
In addition, it is preferable that the barrier layer 11 has a surface of the metal foil on at least the side of the heat-fusible resin layer 15 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)
As the base material layer 13, 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 is used. 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 using these are preferable. 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, nylon MXD 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 (a plurality of layers formed of a PET film/a nylon film, or the like) formed of a polyester film/a polyamide film, for example.
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 stress at the time of molding such as bulge molding and drawing can be reduced, and moldability can be improved. The thickness of the base layer 13 is preferably 12 μm to 30 μm.
(Heat-fusible resin layer)
The heat-fusible resin layer 15 plays the following roles: the heat-sealing material is excellent in chemical resistance even to highly corrosive electrolytes and the like, and imparts heat-sealing properties to the battery packaging material 1.
The resin constituting the heat-fusible resin layer 15 is preferably a single-layer or multi-layer film of a polyolefin resin such as an acrylic resin, and is preferably an unstretched film. Examples of the propylene-based resin include ethylene-propylene copolymers containing ethylene and propylene as copolymerization components. The ethylene-propylene copolymer may be any of random copolymers and block copolymers. 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 30 μm to 80 μm. The ratio of the thicknesses of the layers of the 3-layer film of the random copolymer-block copolymer-random copolymer is preferably 1 to 3: 4-8: 1 to 3.
The heat-fusible resin layer 15 may contain a lubricant. The type of lubricant is preferably a fatty amide, as long as the lubricant is added to the above-mentioned base material protective layer 20. The concentration of the lubricant in the heat-fusible resin layer 15 is preferably 500ppm to 3000ppm. In general, in the manufacturing process of the battery packaging material 1, all layers are stacked and then wound into a roll and aged. The lubricant in the heat-fusible resin layer 15 is deposited on the surface by aging and transferred to the base material protective layer 20, which contributes to suppressing the occurrence of residual adhesive on the protective tape.
(1 st adhesive layer)
The 1 st adhesive layer 12 is not particularly limited, and examples thereof include an adhesive layer formed using 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) containing 1 or 2 or more polyols selected from the group consisting of polyurethane polyols, polyester polyols, polyether polyols and polyester urethane polyols, and a 2 nd liquid (curing agent) containing isocyanate. Among them, a liquid 1 containing 1 or 2 or more kinds of polyols selected from the group consisting of polyester polyols and polyester urethane polyols and a liquid 2 containing isocyanate (curing agent) are preferably used as the 2-liquid curable adhesive. 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 may be preferably 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. Among them, an adhesive formed of a polyurethane composite resin containing an acid-modified polyolefin as a main agent 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, and 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.
(colorant)
In the packaging material for a battery, by adding a colorant to the existing layer or newly providing a coloring layer, the metallic color of the barrier layer is hidden and colored to a desired color, and thus the design property can be imparted to the packaging material, and the adhesive residue of the protective tape can be easily found.
In the case of coloring an existing layer, a colorant is added to at least one layer of the base material protective layer, the base material layer, and the 1 st adhesive layer. In the battery packaging material having no 1 st adhesive layer, a colorant is added to the base material protective layer and/or the base material layer. The colorant may be any of a pigment and a dye, and may be 1, or 2 or more colorants may be used in combination. Specific examples of the colorant include carbon black, calcium carbonate, titanium oxide, zinc oxide, iron oxide, aluminum powder, azo pigments, phthalocyanine pigments, and the like. The colorant concentration in each layer is preferably in the range of 0.5 mass% or more and less than 5 mass%.
When the colored layer is newly provided, the colored layer is provided between at least one of the layers of the base material protective layer and the base material layer, the base material layer and the 1 st adhesive layer, and the 1 st adhesive layer and the barrier layer. In the battery packaging material having no 1 st adhesive layer, a coloring layer is provided between the base material protective layer and the base material layer and/or between the base material layer and the barrier layer. The thickness of the colored layer is preferably set to 1 μm to 10 μm. The colored layer is preferably composed of a colored resin composition obtained by adding the above-mentioned colorant to a base resin containing a main agent such as diamine or polyol and a curing agent. The colorant concentration in the colored resin composition is preferably in the range of 5 mass% to 50 mass%.
The battery packaging material 2 of fig. 3 is obtained by providing a coloring layer 16 between the base material layer 13 and the 1 st adhesive layer 12.
Examples
As examples and comparative examples, a battery packaging material 2 having the structure shown in fig. 3 was produced. Materials commonly used in each example are as follows.
(general purpose materials)
As the barrier layer 11, a product obtained by coating both sides of an aluminum foil formed of a8021-O having a thickness of 40 μm with a chemical conversion treatment liquid containing phosphoric acid, polyacrylic acid (acrylic resin), chromium (III) salt compound, water, and alcohol, followed by drying at 180 ℃ to form a chemical conversion coating was used. The chromium adhesion amount of the chemical conversion coating was 10mg/m per one surface 2 。
As the base material layer 13, a biaxially stretched nylon 6 film having a thickness of 15 μm was used.
As the colored layer 16, a colored resin composition containing carbon black, a diamine, a polyester polyol and a curing agent was applied to one surface of the base layer 13, and the resultant was left to stand at 40 ℃ for 1 day, whereby a crosslinking reaction was performed while drying, and a black colored layer having a thickness of 3 μm was provided. That is, the colored layer 16 and the base layer 13 are integrated into a double-layer film, and the double-layer film is bonded to other layers.
As the heat-fusible resin layer 15, an unstretched polypropylene film having a thickness of 30 μm containing 3000ppm of erucamide as a lubricant 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.
As the solvent added to the resin composition of the substrate protective layer 20, a mixture of 50 parts by mass of methyl ethyl ketone and 50 parts by mass of toluene was used.
Example 1
The resin composition for forming the base material protective layer 20 and the coating composition were prepared by the following methods.
The adhesive resin was prepared by blending, as a main resin, a polyester polyol resin, an adduct of trimethylolpropane and Hexamethylene Diisocyanate (HDI) (referred to as "a" in table 1) as a curing agent, and 11 parts by mass of the curing agent with 49 parts by mass of the main resin.
The solid fine particles used 4 kinds of polyethylene wax as soft resin fine particles, acrylic resin beads as hard resin fine particles, silica as inorganic fine particles, and barium sulfate. The average particle diameter of the solid fine particles, the glass transition temperature Tg of the soft resin fine particles and the hard resin fine particles are shown in table 1.
The binder resin was blended with 4 kinds of solid fine particles at the content shown in table 1 to prepare a resin composition, and 50 parts by mass of the resin composition was further mixed with 100 parts by mass of a solvent to prepare a coating composition. The total content of the solid fine particles in the resin composition is shown in table 1.
Then, a 1 st adhesive layer 12 having a thickness of 3 μm was formed on one surface of the barrier layer 11, and the surface of the colored layer 16 of the base layer 13 (double layer film) with the colored layer 16 was overlapped via the 1 st adhesive layer 12, and dry lamination was performed. 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 resultant was sandwiched between a rubber nip roller and a lamination roller heated to 100 ℃ and pressure-bonded, thereby performing dry lamination. This results in a 6-layer film in which the base material layer 13, the colored layer 16, the 1 st adhesive layer 12, the barrier layer 11, the 2 nd adhesive layer 14, and the heat-fusible resin layer 15 are laminated in this order from the outside to the inside.
Next, the coating composition for the base material protective layer 20 was applied to the surface of the base material layer 13 of the 6-layer laminated film, dried and wound into a roll, and aged at 40 ℃ for 10 hours. The thickness of the base protective layer 20 after aging was 2.5 μm, and thus, a 7-layer structure of the battery packaging material 2 was obtained.
Example 2
The resin composition for forming the base material protective layer 20 and the coating composition were prepared by the following methods.
The same main agent resin and curing agent as in example 1 were blended in a proportion of 10 parts by mass of the curing agent relative to 48 parts by mass of the main agent resin, and the resultant product was used as a binder resin.
The solid fine particles used 4 kinds of polyethylene wax as soft resin fine particles, polystyrene resin beads as hard resin fine particles, silica as inorganic fine particles, and barium sulfate. The average particle diameter of the solid fine particles, the glass transition temperature Tg of the soft resin fine particles and the hard resin fine particles are shown in table 1.
The binder resin was blended with 4 kinds of solid fine particles at the content shown in table 1 to prepare a resin composition, and 50 parts by mass of the resin composition was further mixed with 100 parts by mass of a solvent to prepare a coating composition. The total content of the solid fine particles in the resin composition is shown in table 1.
A 7-layer structured battery packaging material 2 was produced in the same manner as in example 1, except that the resin composition for the base material protective layer 20 and the coating composition were used. The thickness of the substrate protective layer 20 after aging was 2.5 μm.
Example 3
The resin composition for forming the base material protective layer 20 and the coating composition were prepared by the following methods.
The same curing agent as in example 1 was used with the acrylic polyol as the main resin, and a product obtained by blending 9 parts by mass of the curing agent with respect to 46 parts by mass of the main resin was used as the binder resin.
As the solid fine particles, 4 kinds of polyethylene resin beads as soft resin fine particles, polytetrafluoroethylene wax as hard resin fine particles, alumina and barium sulfate as inorganic fine particles are used. The average particle diameter of the solid fine particles, the glass transition temperature Tg of the soft resin fine particles and the hard resin fine particles are shown in table 1.
The binder resin was blended with 4 kinds of solid fine particles at the content shown in table 1 to prepare a resin composition, and 50 parts by mass of the resin composition was further mixed with 100 parts by mass of a solvent to prepare a coating composition. The total content of the solid fine particles in the resin composition is shown in table 1.
A 7-layer structured battery packaging material 2 was produced in the same manner as in example 1, except that the resin composition for the base material protective layer 20 and the coating composition were used. The thickness of the substrate protective layer 20 after aging was 2 μm.
Example 4
The resin composition for forming the base material protective layer 20 and the coating composition were prepared by the following methods.
A copolymer of tetrafluoroolefin and vinyl carboxylate was used as a main agent, and the same curing agent as in example 1 was used, and a product obtained by blending 8 parts by mass of the curing agent with 43 parts by mass of the main agent resin was used as a binder resin.
As the solid fine particles, 4 kinds of polyethylene resin beads as soft resin fine particles, polytetrafluoroethylene wax as hard resin fine particles, silica as inorganic fine particles, and barium sulfate were used. The average particle diameter of the solid fine particles, the glass transition temperature Tg of the soft resin fine particles and the hard resin fine particles are shown in table 1.
The binder resin was blended with 4 kinds of solid fine particles at the content shown in table 1 to prepare a resin composition, and 50 parts by mass of the resin composition was further mixed with 100 parts by mass of a solvent to prepare a coating composition. The total content of the solid fine particles in the resin composition is shown in table 1.
A 7-layer structured battery packaging material 2 was produced in the same manner as in example 1, except that the resin composition for the base material protective layer 20 and the coating composition were used. The thickness of the substrate protective layer 20 after aging was 1.5 μm.
Example 5
The resin composition for forming the base material protective layer 20 and the coating composition were prepared by the following methods.
The same main resin and curing agent as in example 1 were used, and a product obtained by compounding 12 parts by mass of the curing agent with 53 parts by mass of the main resin was used as the binder resin.
As the solid fine particles, 4 kinds of polyethylene wax as soft resin fine particles, polystyrene resin beads as hard resin fine particles, alumina and calcium carbonate as inorganic fine particles are used. The average particle diameter of the solid fine particles, the glass transition temperature Tg of the soft resin fine particles and the hard resin fine particles are shown in table 1.
The binder resin was blended with 4 kinds of solid fine particles at the content shown in table 1 to prepare a resin composition, and 50 parts by mass of the resin composition was further mixed with 100 parts by mass of a solvent to prepare a coating composition. The total content of the solid fine particles in the resin composition is shown in table 1.
A 7-layer structured battery packaging material 2 was produced in the same manner as in example 1, except that the resin composition for the base material protective layer 20 and the coating composition were used. The thickness of the substrate protective layer 20 after aging was 3 μm.
Example 6
The resin composition for forming the base material protective layer 20 and the coating composition were prepared by the following methods.
The polyurethane polyol resin was used as a main resin, and an equal amount of a mixture of an adduct of trimethylolpropane and Hexamethylene Diisocyanate (HDI) and an adduct of trimethylolpropane and Toluene Diisocyanate (TDI) (in table 1, referred to as "B") was used as a curing agent, and a product obtained by blending 10 parts by mass of the curing agent with 46 parts by mass of the main resin was used as a binder resin.
As the solid fine particles, 4 kinds of urethane resin beads as soft resin fine particles, acrylic resin beads as hard resin fine particles, silica and barium carbonate as inorganic fine particles are used. The average particle diameter of the solid fine particles, the glass transition temperature Tg of the soft resin fine particles and the hard resin fine particles are shown in table 1.
The binder resin was blended with 4 kinds of solid fine particles at the content shown in table 1 to prepare a resin composition, and 50 parts by mass of the resin composition was further mixed with 100 parts by mass of a solvent to prepare a coating composition. The total content of the solid fine particles in the resin composition is shown in table 1.
A 7-layer structured battery packaging material 2 was produced in the same manner as in example 1, except that the resin composition for the base material protective layer 20 and the coating composition were used. The thickness of the substrate protective layer 20 after aging was 2 μm.
Example 7
The resin composition for forming the base material protective layer 20 and the coating composition were prepared by the following methods.
The same binder resin as in example 1 was used.
As the solid fine particles, 3 kinds of soft resin fine particles, hard resin fine particles, and silica as inorganic fine particles, which are the same as in example 1, were used. The average particle diameter of the solid fine particles, the glass transition temperature Tg of the soft resin fine particles and the hard resin fine particles are shown in table 1.
The 3 kinds of solid fine particles were blended into the binder resin at the content shown in table 1 to prepare a resin composition, and 50 parts by mass of the resin composition was further mixed with 100 parts by mass of a solvent to prepare a coating composition. The total content of the solid fine particles in the resin composition is shown in table 1.
A 7-layer structured battery packaging material 2 was produced in the same manner as in example 1, except that the resin composition for the base material protective layer 20 and the coating composition were used. The thickness of the substrate protective layer 20 after aging was 2.5 μm.
Comparative example 1
The resin composition for forming the base material protective layer 20 and the coating composition were prepared by the following methods.
The same main resin and curing agent as in example 1 were used, and a product obtained by compounding 12 parts by mass of the curing agent with 60 parts by mass of the main resin was used as the binder resin.
The solid fine particles are 4 kinds of particles, that is, polystyrene resin beads and acrylic resin beads as hard resin fine particles, and silica and barium sulfate as inorganic fine particles, without using soft resin fine particles. The average particle diameter of the solid fine particles, the glass transition temperature Tg of the soft resin fine particles and the hard resin fine particles are shown in table 1.
The binder resin was blended with 4 kinds of solid fine particles at the content shown in table 1 to prepare a resin composition, and 50 parts by mass of the resin composition was further mixed with 100 parts by mass of a solvent to prepare a coating composition. The total content of the solid fine particles in the resin composition is shown in table 1.
A 7-layer structured battery packaging material 2 was produced in the same manner as in example 1, except that the resin composition for the base material protective layer 20 and the coating composition were used. The thickness of the substrate protective layer 20 after aging was 3 μm.
Comparative example 2
The resin composition for forming the base material protective layer 20 and the coating composition were prepared by the following methods.
The same main resin and curing agent as in example 3 were used, and the resultant product obtained by compounding 8 parts by mass of the curing agent with respect to 37 parts by mass of the main resin was used as the binder resin.
The solid fine particles are 4 kinds of particles, that is, acrylic resin beads and polytetrafluoroethylene wax as hard resin fine particles, and alumina and barium sulfate as inorganic fine particles, without using soft resin fine particles. The average particle diameter of the solid fine particles, the glass transition temperature Tg of the soft resin fine particles and the hard resin fine particles are shown in table 1.
The binder resin was blended with 4 kinds of solid fine particles at the content shown in table 1 to prepare a resin composition, and 50 parts by mass of the resin composition was further mixed with 100 parts by mass of a solvent to prepare a coating composition. The total content of the solid fine particles in the resin composition is shown in table 1.
A 7-layer structured battery packaging material 2 was produced in the same manner as in example 1, except that the resin composition for the base material protective layer 20 and the coating composition were used. The thickness of the substrate protective layer 20 after aging was 2 μm.
Comparative example 3
The resin composition for forming the base material protective layer 20 and the coating composition were prepared by the following methods.
The same binder resin as in example 1 was used.
The solid fine particles do not use soft resin fine particles, but use 3 kinds of acrylic resin beads as hard resin fine particles, silica as inorganic fine particles, and barium sulfate. The average particle diameter of each solid fine particle and the glass transition temperature Tg of the hard resin fine particle are shown in table 1.
The 3 kinds of solid fine particles were blended into the binder resin at the content shown in table 1 to prepare a resin composition, and 50 parts by mass of the resin composition was further mixed with 100 parts by mass of a solvent to prepare a coating composition. The total content of the solid fine particles in the resin composition is shown in table 1.
A 7-layer structured battery packaging material 2 was produced in the same manner as in example 1, except that the resin composition for the base material protective layer 20 and the coating composition were used. The thickness of the substrate protective layer 20 after aging was 2.5 μm.
Comparative example 4
The resin composition for forming the base material protective layer 20 and the coating composition were prepared by the following methods.
The same binder resin as in example 1 was used.
The solid fine particles are composed of 3 kinds of particles, namely, polyethylene wax as soft resin fine particles, hard resin fine particles, silica and barium sulfate as inorganic fine particles, and the like. The average particle diameter of each solid fine particle and the glass transition temperature Tg of the soft resin fine particle are shown in table 1.
The 3 kinds of solid fine particles were blended into the binder resin at the content shown in table 1 to prepare a resin composition, and 50 parts by mass of the resin composition was further mixed with 100 parts by mass of a solvent to prepare a coating composition. The total content of the solid fine particles in the resin composition is shown in table 1.
A 7-layer structured battery packaging material 2 was produced in the same manner as in example 1, except that the resin composition for the base material protective layer 20 and the coating composition were used. The thickness of the substrate protective layer 20 after aging was 2.5 μm.
Comparative example 5
The resin composition for forming the base material protective layer 20 and the coating composition were prepared by the following methods.
The same binder resin as in example 1 was used.
As the solid fine particles, 3 kinds of polyethylene wax as soft resin fine particles, acrylic resin beads as hard resin fine particles, and barium sulfate as inorganic fine particles were used. The average particle diameter of each solid fine particle and the glass transition temperature Tg of the soft resin fine particle are shown in table 1.
The 3 kinds of solid fine particles were blended into the binder resin at the content shown in table 1 to prepare a resin composition, and 50 parts by mass of the resin composition was further mixed with 100 parts by mass of a solvent to prepare a coating composition. The total content of the solid fine particles in the resin composition is shown in table 1.
A 7-layer structured battery packaging material 2 was produced in the same manner as in example 1, except that the resin composition for the base material protective layer 20 and the coating composition were used. The thickness of the substrate protective layer 20 after aging was 2.5 μm.
TABLE 1
In table 1, abbreviations for the main agent resin, soft resin fine particles, and hard resin fine particles are as follows.
(Main agent resin)
PEs: polyester polyol resin, AC: acrylic polyol resin
TFE: copolymers of tetrafluoroethylene and vinyl carboxylate
PUR: polyurethane polyol resin
(Soft resin particles)
PEW: polyethylene wax, PEB: polyethylene resin beads
URB: urethane resin beads), PPW: polypropylene wax
(hard resin particles)
ACB: acrylic beads, PTFE: polytetrafluoroethylene wax
PSB: polystyrene resin beads
For each of the produced battery packaging materials 2, the following items were measured and evaluated. The results are shown in Table 1.
(formability)
A plurality of test pieces of 100mm X125 mm were cut out from the produced battery packaging material 2, and for these test pieces, a molding machine (model: TP-25C-XZ) manufactured by LTD was used, and deep drawing was performed by changing the depth by a die having a top surface size of 33mm X54 mm, a corner R of 2mm, a punch shoulder R of 1.3mm, and a die shoulder R of 1 mm.
In the deep drawing product, the presence or absence of pinholes and cracks at the corners was checked by a light transmission method in a dark room, and the depth at which pinholes and cracks did not occur was defined as the maximum molding depth (mm) of the battery packaging material 2. The maximum molding depth was evaluated based on the following determination criteria, and good was regarded as acceptable.
And (3) the following materials: the maximum molding depth is more than 5.5mm
And (2) the following steps: the maximum molding depth is 4.5 mm-less than 5.5mm
X: the maximum molding depth is less than 4.5mm
(adhesive tape adhesion)
Test pieces 15mm wide by 150mm long were cut out from the battery packaging material 2. An adhesive tape (tesa 70415) having an adhesive strength of 13N/cm was attached to the base material protective layer 20 of the test piece along the longitudinal direction of the test piece at a width of 5mm by a length of 80 mm. Then, a manual roller (hand roll) having a weight of 2kgf was allowed to travel 5 times on the adhesive tape, and then allowed to stand at room temperature for 1 hour.
Next, as a tensile tester, a stratagsh (AGS-5 kNX) manufactured by shimadzu corporation was used, and the end of the test piece was clamped and fixed by one of the chucks, and the end of the adhesive tape was clamped by the other chuck. Then, the peel strength at 180℃of peeling 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, and the test piece was qualified.
And (3) the following materials: at least 7N/5mm, the adhesion is very high
And (2) the following steps: 5N/5mm or more and less than 7N/5mm, and high adhesion
X: less than 5N/5mm, low adhesion
(residual glue)
Test pieces 50mm wide by 100mm long were cut out from the battery packaging material 2. An adhesive tape (Ridong electric V420) having an adhesive strength of 0.1N/cm was attached to the base material protective layer 20 of the test piece along the longitudinal direction of the test piece at a width of 40mm by a length of 60 mm. Then, a manual roller having a weight of 2kgf was moved 5 times back and forth on the adhesive tape. Next, the test piece to which the adhesive tape was attached was subjected to hot pressing at 80 ℃.
Then, the adhesive tape was peeled off rapidly by hand from the test piece after the series of treatments, and the peeled surface was observed and evaluated according to the following criteria, and good was regarded as acceptable.
And (3) the following materials: the surface state is completely unchanged from that before sealing and attaching
And (2) the following steps: adhesive with small fragments left to the extent that they can be removed by gentle wiping
Delta: the adhesive remains with the chips larger than good, although the chips can be removed by wiping with light
X: the adhesive remains in a state that the adhesive cannot be removed even by wiping
From table 1, it was confirmed that the adhesive tape was excellent in adhesion and the residual adhesive at the time of peeling was suppressed by defining the solid particles of the base material protective layer.
Industrial applicability
The battery packaging material of the present application can be suitably used as a packaging material for a battery or a capacitor used in a portable device such as a smart phone or a tablet pc, or a battery or a capacitor used in a wind power generation, a solar power generation, or a night electric power storage.
The present application claims priority from japanese patent application publication No. 2022-68030 filed at month 4 and 18 of 2022 and japanese patent application publication No. 2023-40789 filed at month 3 and 15 of 2023, the disclosures of which are directly made part of the present application.
It is to 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.
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
16 … colored layer
20 … protective layer for substrate
21 … binder resin
22 … solid particles
22a … Soft resin particles
22b … hard resin particles
22c … inorganic particles
30 … projection
Claims (11)
1. A packaging material for a battery comprising a base layer, a heat-fusible resin layer, a barrier layer disposed between the two layers, and a base protective layer as an outermost layer on the outer side of the base layer,
the substrate protective layer comprises a binder resin, soft resin particles having a glass transition temperature Tg of less than 30 ℃ as solid particles, hard resin particles having a glass transition temperature Tg of 30 ℃ or more, and inorganic particles,
the total content of the solid particles in the substrate protective layer is 30 to 50 mass%.
2. The battery packaging material according to claim 1, wherein the soft resin fine particles have an average particle diameter of 5 μm to 20 μm, the hard resin fine particles have an average particle diameter of 1 μm to 15 μm, and the inorganic fine particles have an average particle diameter of 1 μm to 10 μm.
3. The battery packaging material according to claim 1 or 2, wherein the content of the soft resin fine particles in the base material protective layer is 1 to 10% by mass, the content of the hard resin fine particles is 1 to 20% by mass, and the content of the inorganic fine particles is 20 to 40% by mass.
4. The battery packaging material according to claim 1 or 2, wherein the soft resin fine particles are at least 1 selected from the group consisting of polyethylene wax, polypropylene wax, polyethylene resin beads, and urethane resin beads.
5. The battery packaging material according to claim 1 or 2, wherein the hard resin fine particles are at least 1 selected from polytetrafluoroethylene wax, acrylic resin beads, polystyrene resin beads, and fluororesin beads.
6. The battery pack according to claim 1 or 2, wherein the inorganic fine particles are at least 1 selected from the group consisting of silica, alumina, kaolin, calcium oxide, calcium carbonate, calcium sulfate, barium sulfate, and calcium silicate.
7. The battery packaging material according to claim 1 or 2, wherein the binder resin of the base material protective layer is at least 1 selected from the group consisting of an acrylic resin, a urethane resin, a polyolefin resin, a phenoxy resin, a polyester resin, and a tetrafluoro-olefin resin.
8. The packaging material for a battery according to claim 1 or 2, wherein the base material protective layer and/or the base material layer contains a colorant.
9. The battery packaging material according to claim 1 or 2, wherein the barrier layer and the base material layer are laminated via an adhesive layer, and at least one of the base material protective layer, the base material layer, and the adhesive layer contains a colorant.
10. The packaging material for a battery according to claim 1 or 2, wherein a colored layer is provided between the base material protective layer and the base material layer and/or between the base material layer and the barrier layer.
11. The battery packaging material according to claim 1 or 2, wherein the barrier layer and the base material layer are laminated with an adhesive layer interposed therebetween, and a coloring layer is provided between at least one of the base material protective layer and the base material layer, the base material layer and the adhesive layer, and the adhesive layer and the barrier layer.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2022-068030 | 2022-04-18 | ||
| JP2023040789A JP2023158633A (en) | 2022-04-18 | 2023-03-15 | Battery packaging material |
| JP2023-040789 | 2023-03-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117013160A true CN117013160A (en) | 2023-11-07 |
Family
ID=88569782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310408035.8A Pending CN117013160A (en) | 2022-04-18 | 2023-04-17 | Packaging material for battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117013160A (en) |
-
2023
- 2023-04-17 CN CN202310408035.8A patent/CN117013160A/en active Pending
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