WO2014156905A1 - 電池用包装材料 - Google Patents
電池用包装材料 Download PDFInfo
- Publication number
- WO2014156905A1 WO2014156905A1 PCT/JP2014/057607 JP2014057607W WO2014156905A1 WO 2014156905 A1 WO2014156905 A1 WO 2014156905A1 JP 2014057607 W JP2014057607 W JP 2014057607W WO 2014156905 A1 WO2014156905 A1 WO 2014156905A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- layer
- adhesive layer
- resin
- packaging material
- base material
- Prior art date
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- 239000005022 packaging material Substances 0.000 title claims abstract description 111
- 239000010410 layer Substances 0.000 claims abstract description 390
- 239000012790 adhesive layer Substances 0.000 claims abstract description 223
- 229920005989 resin Polymers 0.000 claims abstract description 123
- 239000011347 resin Substances 0.000 claims abstract description 123
- 230000004888 barrier function Effects 0.000 claims abstract description 113
- 239000011342 resin composition Substances 0.000 claims abstract description 89
- 229920001187 thermosetting polymer Polymers 0.000 claims abstract description 68
- 239000012508 resin bead Substances 0.000 claims abstract description 64
- 239000000565 sealant Substances 0.000 claims abstract description 57
- 229920001971 elastomer Polymers 0.000 claims abstract description 39
- 239000000806 elastomer Substances 0.000 claims abstract description 37
- 239000000463 material Substances 0.000 claims description 116
- -1 amidine compound Chemical class 0.000 claims description 113
- 239000000126 substance Substances 0.000 claims description 106
- 238000000034 method Methods 0.000 claims description 52
- 239000011888 foil Substances 0.000 claims description 29
- 229910052751 metal Inorganic materials 0.000 claims description 28
- 239000002184 metal Substances 0.000 claims description 28
- 239000011247 coating layer Substances 0.000 claims description 21
- 238000004519 manufacturing process Methods 0.000 claims description 19
- 230000008569 process Effects 0.000 claims description 18
- 238000010438 heat treatment Methods 0.000 claims description 13
- 229920002803 thermoplastic polyurethane Polymers 0.000 claims description 13
- 239000000975 dye Substances 0.000 claims description 12
- 125000000524 functional group Chemical group 0.000 claims description 12
- 229920000178 Acrylic resin Polymers 0.000 claims description 10
- 239000004925 Acrylic resin Substances 0.000 claims description 10
- 239000000843 powder Substances 0.000 claims description 10
- 238000003475 lamination Methods 0.000 claims description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 8
- 239000003822 epoxy resin Substances 0.000 claims description 8
- 229920000647 polyepoxide Polymers 0.000 claims description 8
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical class S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 claims description 7
- 239000011324 bead Substances 0.000 claims description 7
- 239000001023 inorganic pigment Substances 0.000 claims description 7
- 230000001678 irradiating effect Effects 0.000 claims description 7
- IOJUPLGTWVMSFF-UHFFFAOYSA-N benzothiazole Chemical class C1=CC=C2SC=NC2=C1 IOJUPLGTWVMSFF-UHFFFAOYSA-N 0.000 claims description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 6
- 238000010030 laminating Methods 0.000 claims description 6
- 239000005011 phenolic resin Substances 0.000 claims description 6
- 239000003792 electrolyte Substances 0.000 claims description 5
- OAKJQQAXSVQMHS-UHFFFAOYSA-N hydrazine Substances NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 claims description 5
- 229920003180 amino resin Polymers 0.000 claims description 4
- 229920000180 alkyd Polymers 0.000 claims description 3
- 238000004806 packaging method and process Methods 0.000 claims description 3
- 229920006337 unsaturated polyester resin Polymers 0.000 claims description 3
- 230000001965 increasing effect Effects 0.000 abstract description 6
- 239000002585 base Substances 0.000 description 97
- 238000011282 treatment Methods 0.000 description 43
- 238000006243 chemical reaction Methods 0.000 description 25
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 19
- 229920000728 polyester Polymers 0.000 description 19
- 229910052782 aluminium Inorganic materials 0.000 description 18
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- 238000000576 coating method Methods 0.000 description 16
- 239000010408 film Substances 0.000 description 16
- 239000000853 adhesive Substances 0.000 description 15
- 239000000203 mixture Substances 0.000 description 15
- 230000001070 adhesive effect Effects 0.000 description 14
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- 230000037303 wrinkles Effects 0.000 description 14
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 13
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- 229920001577 copolymer Polymers 0.000 description 12
- 125000004122 cyclic group Chemical group 0.000 description 12
- 238000000465 moulding Methods 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 11
- NBIIXXVUZAFLBC-UHFFFAOYSA-N phosphoric acid Substances OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 11
- 239000004952 Polyamide Substances 0.000 description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 10
- 239000002253 acid Substances 0.000 description 10
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 10
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- 238000012360 testing method Methods 0.000 description 9
- 239000004677 Nylon Substances 0.000 description 8
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 8
- 239000011248 coating agent Substances 0.000 description 8
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- 150000003077 polyols Chemical class 0.000 description 8
- 238000007789 sealing Methods 0.000 description 8
- 239000012748 slip agent Substances 0.000 description 8
- 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 7
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 7
- 238000004132 cross linking Methods 0.000 description 7
- 230000007547 defect Effects 0.000 description 7
- 238000007756 gravure coating Methods 0.000 description 7
- 229920001296 polysiloxane Polymers 0.000 description 7
- GQHTUMJGOHRCHB-UHFFFAOYSA-N 2,3,4,6,7,8,9,10-octahydropyrimido[1,2-a]azepine Chemical compound C1CCCCN2CCCN=C21 GQHTUMJGOHRCHB-UHFFFAOYSA-N 0.000 description 6
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 6
- 239000005977 Ethylene Substances 0.000 description 6
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 6
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 6
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 6
- 238000009820 dry lamination Methods 0.000 description 6
- 230000006870 function Effects 0.000 description 6
- 239000011810 insulating material Substances 0.000 description 6
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 description 6
- 239000000178 monomer Substances 0.000 description 6
- 229910052759 nickel Inorganic materials 0.000 description 6
- 229920005629 polypropylene homopolymer Polymers 0.000 description 6
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 5
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- 239000004721 Polyphenylene oxide Substances 0.000 description 5
- 125000000217 alkyl group Chemical group 0.000 description 5
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 description 5
- 229910052804 chromium Inorganic materials 0.000 description 5
- 239000011651 chromium Substances 0.000 description 5
- 150000002989 phenols Chemical class 0.000 description 5
- 229920001707 polybutylene terephthalate Polymers 0.000 description 5
- 229920000570 polyether Polymers 0.000 description 5
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- 239000004814 polyurethane Substances 0.000 description 5
- 238000004904 shortening Methods 0.000 description 5
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 4
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 4
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 4
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 4
- 239000000654 additive Substances 0.000 description 4
- 239000006229 carbon black Substances 0.000 description 4
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 description 4
- 229910021563 chromium fluoride Inorganic materials 0.000 description 4
- 239000003086 colorant Substances 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 125000002768 hydroxyalkyl group Chemical group 0.000 description 4
- RAXXELZNTBOGNW-UHFFFAOYSA-N imidazole Natural products C1=CNC=N1 RAXXELZNTBOGNW-UHFFFAOYSA-N 0.000 description 4
- 239000012948 isocyanate Substances 0.000 description 4
- 229910001416 lithium ion Inorganic materials 0.000 description 4
- 229920006284 nylon film Polymers 0.000 description 4
- 238000009823 thermal lamination Methods 0.000 description 4
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 4
- LMDZBCPBFSXMTL-UHFFFAOYSA-N 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide Chemical compound CCN=C=NCCCN(C)C LMDZBCPBFSXMTL-UHFFFAOYSA-N 0.000 description 3
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
- WSQZNZLOZXSBHA-UHFFFAOYSA-N 3,8-dioxabicyclo[8.2.2]tetradeca-1(12),10,13-triene-2,9-dione Chemical compound O=C1OCCCCOC(=O)C2=CC=C1C=C2 WSQZNZLOZXSBHA-UHFFFAOYSA-N 0.000 description 3
- LLLVZDVNHNWSDS-UHFFFAOYSA-N 4-methylidene-3,5-dioxabicyclo[5.2.2]undeca-1(9),7,10-triene-2,6-dione Chemical compound C1(C2=CC=C(C(=O)OC(=C)O1)C=C2)=O LLLVZDVNHNWSDS-UHFFFAOYSA-N 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 3
- 239000005057 Hexamethylene diisocyanate Substances 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 3
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 150000001412 amines Chemical class 0.000 description 3
- 125000004432 carbon atom Chemical group C* 0.000 description 3
- 229920006317 cationic polymer Polymers 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 239000000470 constituent Substances 0.000 description 3
- 239000003431 cross linking reagent Substances 0.000 description 3
- 229910052736 halogen Inorganic materials 0.000 description 3
- 150000002367 halogens Chemical class 0.000 description 3
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 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 3
- QQVIHTHCMHWDBS-UHFFFAOYSA-L isophthalate(2-) Chemical compound [O-]C(=O)C1=CC=CC(C([O-])=O)=C1 QQVIHTHCMHWDBS-UHFFFAOYSA-L 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
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- 238000005096 rolling process Methods 0.000 description 3
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- 239000010935 stainless steel Substances 0.000 description 3
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- 239000000758 substrate Substances 0.000 description 3
- IMNIMPAHZVJRPE-UHFFFAOYSA-N triethylenediamine Chemical compound C1CN2CCN1CC2 IMNIMPAHZVJRPE-UHFFFAOYSA-N 0.000 description 3
- SBJCUZQNHOLYMD-UHFFFAOYSA-N 1,5-Naphthalene diisocyanate Chemical compound C1=CC=C2C(N=C=O)=CC=CC2=C1N=C=O SBJCUZQNHOLYMD-UHFFFAOYSA-N 0.000 description 2
- ICLCCFKUSALICQ-UHFFFAOYSA-N 1-isocyanato-4-(4-isocyanato-3-methylphenyl)-2-methylbenzene Chemical compound C1=C(N=C=O)C(C)=CC(C=2C=C(C)C(N=C=O)=CC=2)=C1 ICLCCFKUSALICQ-UHFFFAOYSA-N 0.000 description 2
- LLPKQRMDOFYSGZ-UHFFFAOYSA-N 2,5-dimethyl-1h-imidazole Chemical compound CC1=CN=C(C)N1 LLPKQRMDOFYSGZ-UHFFFAOYSA-N 0.000 description 2
- SYBYTAAJFKOIEJ-UHFFFAOYSA-N 3-Methylbutan-2-one Chemical compound CC(C)C(C)=O SYBYTAAJFKOIEJ-UHFFFAOYSA-N 0.000 description 2
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- GZVHEAJQGPRDLQ-UHFFFAOYSA-N 6-phenyl-1,3,5-triazine-2,4-diamine Chemical compound NC1=NC(N)=NC(C=2C=CC=CC=2)=N1 GZVHEAJQGPRDLQ-UHFFFAOYSA-N 0.000 description 2
- WFDIJRYMOXRFFG-UHFFFAOYSA-N Acetic anhydride Chemical compound CC(=O)OC(C)=O WFDIJRYMOXRFFG-UHFFFAOYSA-N 0.000 description 2
- GVNWZKBFMFUVNX-UHFFFAOYSA-N Adipamide Chemical compound NC(=O)CCCCC(N)=O GVNWZKBFMFUVNX-UHFFFAOYSA-N 0.000 description 2
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- QOSSAOTZNIDXMA-UHFFFAOYSA-N Dicylcohexylcarbodiimide Chemical compound C1CCCCC1N=C=NC1CCCCC1 QOSSAOTZNIDXMA-UHFFFAOYSA-N 0.000 description 2
- 239000005058 Isophorone diisocyanate Substances 0.000 description 2
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 2
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- 229920002302 Nylon 6,6 Polymers 0.000 description 2
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- 239000004840 adhesive resin Substances 0.000 description 2
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- WNLRTRBMVRJNCN-UHFFFAOYSA-L adipate(2-) Chemical compound [O-]C(=O)CCCCC([O-])=O WNLRTRBMVRJNCN-UHFFFAOYSA-L 0.000 description 2
- 125000002723 alicyclic group Chemical group 0.000 description 2
- 150000001336 alkenes Chemical class 0.000 description 2
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- 150000008064 anhydrides Chemical class 0.000 description 2
- UENWRTRMUIOCKN-UHFFFAOYSA-N benzyl thiol Chemical class SCC1=CC=CC=C1 UENWRTRMUIOCKN-UHFFFAOYSA-N 0.000 description 2
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 150000001718 carbodiimides Chemical class 0.000 description 2
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 2
- 229910000420 cerium oxide Inorganic materials 0.000 description 2
- PHFQLYPOURZARY-UHFFFAOYSA-N chromium trinitrate Chemical compound [Cr+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O PHFQLYPOURZARY-UHFFFAOYSA-N 0.000 description 2
- ZYGHJZDHTFUPRJ-UHFFFAOYSA-N coumarin Chemical compound C1=CC=C2OC(=O)C=CC2=C1 ZYGHJZDHTFUPRJ-UHFFFAOYSA-N 0.000 description 2
- MGNZXYYWBUKAII-UHFFFAOYSA-N cyclohexa-1,3-diene Chemical compound C1CC=CC=C1 MGNZXYYWBUKAII-UHFFFAOYSA-N 0.000 description 2
- ZSWFCLXCOIISFI-UHFFFAOYSA-N cyclopentadiene Chemical compound C1C=CC=C1 ZSWFCLXCOIISFI-UHFFFAOYSA-N 0.000 description 2
- 238000005238 degreasing Methods 0.000 description 2
- KORSJDCBLAPZEQ-UHFFFAOYSA-N dicyclohexylmethane-4,4'-diisocyanate Chemical compound C1CC(N=C=O)CCC1CC1CCC(N=C=O)CC1 KORSJDCBLAPZEQ-UHFFFAOYSA-N 0.000 description 2
- 125000005442 diisocyanate group Chemical group 0.000 description 2
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- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 2
- NAQMVNRVTILPCV-UHFFFAOYSA-N hexane-1,6-diamine Chemical compound NCCCCCCN NAQMVNRVTILPCV-UHFFFAOYSA-N 0.000 description 2
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- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 2
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- QQVIHTHCMHWDBS-UHFFFAOYSA-N isophthalic acid Chemical compound OC(=O)C1=CC=CC(C(O)=O)=C1 QQVIHTHCMHWDBS-UHFFFAOYSA-N 0.000 description 2
- AWJUIBRHMBBTKR-UHFFFAOYSA-N isoquinoline Chemical compound C1=NC=CC2=CC=CC=C21 AWJUIBRHMBBTKR-UHFFFAOYSA-N 0.000 description 2
- 150000002576 ketones Chemical class 0.000 description 2
- 230000031700 light absorption Effects 0.000 description 2
- HQKMJHAJHXVSDF-UHFFFAOYSA-L magnesium stearate Chemical compound [Mg+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O HQKMJHAJHXVSDF-UHFFFAOYSA-L 0.000 description 2
- 238000000691 measurement method Methods 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- PLDDOISOJJCEMH-UHFFFAOYSA-N neodymium(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Nd+3].[Nd+3] PLDDOISOJJCEMH-UHFFFAOYSA-N 0.000 description 2
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 description 2
- FDPIMTJIUBPUKL-UHFFFAOYSA-N pentan-3-one Chemical compound CCC(=O)CC FDPIMTJIUBPUKL-UHFFFAOYSA-N 0.000 description 2
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- 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
- AOHJOMMDDJHIJH-UHFFFAOYSA-N propylenediamine Chemical compound CC(N)CN AOHJOMMDDJHIJH-UHFFFAOYSA-N 0.000 description 2
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- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/124—Primary casings; Jackets or wrappings characterised by the material having a layered structure
- H01M50/126—Primary casings; Jackets or wrappings characterised by the material having a layered structure comprising three or more layers
- H01M50/129—Primary casings; Jackets or wrappings characterised by the material having a layered structure comprising three or more layers with two or more layers of only organic material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2255/00—Coating on the layer surface
- B32B2255/10—Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2255/00—Coating on the layer surface
- B32B2255/26—Polymeric coating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
- B32B2264/02—Synthetic macromolecular particles
- B32B2264/0214—Particles made of materials belonging to B32B27/00
- B32B2264/025—Acrylic resin particles, e.g. polymethyl methacrylate or ethylene-acrylate copolymers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
- B32B2264/02—Synthetic macromolecular particles
- B32B2264/0214—Particles made of materials belonging to B32B27/00
- B32B2264/0292—Polyurethane particles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
- B32B2264/10—Inorganic particles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
- B32B2264/10—Inorganic particles
- B32B2264/107—Ceramic
- B32B2264/108—Carbon, e.g. graphite particles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2439/00—Containers; Receptacles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2457/00—Electrical equipment
- B32B2457/10—Batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/105—Pouches or flexible bags
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/121—Organic material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/131—Primary casings; Jackets or wrappings characterised by physical properties, e.g. gas permeability, size or heat resistance
- H01M50/133—Thickness
-
- 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
Definitions
- the present invention relates to a film-like battery packaging material that can cure an adhesive layer provided between a base material layer and a barrier layer in a short time to provide excellent adhesion strength and has excellent moldability.
- a base material layer, an adhesive layer, and a barrier layer are usually bonded together by a dry lamination method using a two-component curable adhesive.
- a dry lamination method using a two-component curable adhesive.
- the conventional film-shaped battery packaging material has a drawback that the lead time is prolonged by the curing process of the adhesive layer, and product defects are caused by being exposed to high temperature conditions and temperature changes for a long time.
- a film-like battery packaging material in order to cure the adhesive layer provided between the base material layer and the barrier layer in a short time, it is effective to use an adhesive component having many reactive groups.
- the adhesive component In the adhesive component, the distance between reactive groups in the three-dimensional cross-linking structure of the adhesive layer is shortened, causing problems such as shrinkage at the time of curing or being hard and brittle, and sufficient formability required as a battery packaging material It becomes impossible to prepare for.
- the present invention provides a film-like battery packaging material that can be cured in a short time by providing an adhesive layer provided between the base material layer and the barrier layer, thereby providing excellent adhesion strength, and having excellent moldability.
- the purpose is to provide.
- the present inventors at least in a battery packaging material comprising a laminate having a base material layer, an adhesive layer, a barrier layer, and a sealant layer in this order, the adhesion.
- the adhesive layer provided between the base material layer and the barrier layer is cured in a short time by forming the layer with a cured product of a resin composition containing a thermosetting resin, a curing accelerator, and an elastomer resin. And found that lead time can be shortened. Furthermore, it has been found that by providing the adhesive layer between the base material layer and the barrier layer, the adhesive strength between the base material layer and the barrier layer is high, and excellent moldability can be provided.
- the present inventors in a battery packaging material composed of a laminate having at least a base material layer, an adhesive layer, a barrier layer, and a sealant layer in this order, the adhesive layer is reacted with a thermosetting resin. It has also been found that the moldability of the battery packaging material can be remarkably improved by forming with a cured product of a resin composition containing resin beads. Furthermore, in this case, it was also found that by further adding a curing accelerator to the resin composition forming the adhesive layer, the adhesive layer can be cured in a short time and the lead time can be shortened.
- the inventors of the present invention can cure the adhesive layer provided between the base material layer and the barrier layer in a short time by including an absorption heat generating substance in at least one layer included in the laminate. It has been found that excellent adhesion strength can be provided and lead time can be shortened. The present invention has been completed by further studies based on such knowledge.
- Item 1 It consists of a laminate having at least a base material layer, an adhesive layer, a barrier layer, and a sealant layer in this order, The battery packaging, wherein the adhesive layer is a cured product of a resin composition containing a thermosetting resin and (A) a curing accelerator and an elastomer resin, or (B) a reactive resin bead. material.
- the adhesive layer is a cured product of a resin composition containing a thermosetting resin and (A) a curing accelerator and an elastomer resin, or (B) a reactive resin bead. material.
- Item 2. Item 2. The battery packaging material according to Item 1, wherein the adhesive layer is a cured product of a resin composition containing (B) reactive resin beads and a curing accelerator.
- Item 3. Item 3.
- Item 4. Item 4. The battery packaging material according to any one of Items 1 to 3, wherein the reactive resin beads have a refractive index of 1.3 to 1.8.
- Item 5. Item 5. The battery packaging material according to any one of Items 1 to 4, wherein at least one layer contained in the laminate contains a light-absorbing exothermic substance.
- Item 6. Item 6. The battery packaging material according to any one of Items 1 to 5, wherein the adhesive layer contains a light-absorbing exothermic substance.
- Item 7. Item 7.
- Packaging materials Item 9.
- thermosetting resin is at least one selected from the group consisting of epoxy resins, amino resins, acrylic resins, urethane resins, phenol resins, unsaturated polyester resins, and alkyd resins.
- a packaging material for a battery as described in 1. Item 10. Items 1 to 9 wherein the curing accelerator is at least one selected from the group consisting of amidine compounds, carbodiimide compounds, ketimine compounds, hydrazine compounds, sulfonium salts, benzothiazolium salts, and tertiary amine compounds. The battery packaging material according to any one of the above. Item 11. Item 11. The battery packaging material according to any one of Items 1 to 10, wherein the barrier layer is a metal foil.
- the manufacturing method of the packaging material for batteries including the following process.
- the manufacturing method of the packaging material for batteries including the lamination process which laminates
- Item 14. Item 12. A battery, wherein a battery element including at least a positive electrode, a negative electrode, and an electrolyte is accommodated in the battery packaging material according to any one of Items 1 to 11.
- the adhesive layer provided between the base material layer and the barrier layer is a cured product of a resin composition containing a thermosetting resin, a curing accelerator, and an elastomer resin.
- the adhesive layer contains a curing accelerator, it can be cured in a short time without requiring aging under high temperature conditions, so that the lead time can be shortened, and further, by being exposed to high temperature conditions for a long time. It is also possible to prevent product defects.
- the adhesive layer contains a curing accelerator and an elastomer resin together with a curable resin, so that high adhesion strength can be imparted between the base material layer and the barrier layer, and the shrinkage during curing is suppressed.
- the adhesive layer can be provided with appropriate flexibility, so that excellent moldability can be imparted to the battery packaging material.
- the adhesive layer provided between the base material layer and the barrier layer is a cured product of a resin composition containing a thermosetting resin and reactive resin beads.
- the reactive resin beads are bonded to the thermosetting resin by a chemical bond, so that the battery packaging material has excellent moldability while maintaining the adhesive strength of the adhesive layer. Even if the molding depth during deep drawing is increased, the occurrence of cracks, pinholes, and the like can be suppressed.
- the adhesive layer can be cured in a short time without requiring aging under high temperature conditions, thereby shortening the lead time. Furthermore, it is possible to prevent the occurrence of product defects due to exposure to high temperature conditions for a long period of time.
- the battery packaging material of the present invention when the light-absorbing and exothermic substance is contained in at least one layer in the laminate, the light-absorbing and exothermic substance contained in at least one layer in the laminate when the adhesive layer is cured Therefore, it is possible to form an adhesive layer that is uniform in curing state and has excellent adhesion strength.
- the battery packaging material of the present invention comprises a laminate having at least a base material layer, an adhesive layer, a barrier layer, and a sealant layer in this order.
- the adhesive layer comprises a thermosetting resin and (A) a curing accelerator. And a cured product of a resin composition containing an elastomer resin or (B) reactive resin beads. That is, the adhesive layer is a cured product of a resin composition containing a thermosetting resin and (A) a curing accelerator and an elastomer resin, or the adhesive layer is a thermosetting resin and (B) It is a cured product of a resin composition containing reactive resin beads.
- the battery packaging material of the present invention will be described in detail.
- the case where the adhesive layer provided between the base material layer and the barrier layer is a cured product of a resin composition containing a thermosetting resin and reactive resin beads may be referred to as an aspect A.
- cured material of the resin composition containing a thermosetting resin and a reactive resin bead may be called aspect B.
- the case where at least one layer included in the laminate contains a light-absorbing exothermic substance may be referred to as an aspect C.
- the battery packaging material of the present invention it is sufficient that at least one of the aspects A and B is satisfied.
- the battery A may have the aspects A and B, or the aspects A and C, and the aspects B and A. C, or all of embodiments A to C may be included.
- the battery packaging material has a laminated structure comprising at least a base material layer 1, an adhesive layer 2, a barrier layer 3, and a sealant layer 4 in this order.
- the base material layer 1 is the outermost layer and the sealant layer 4 is the innermost layer.
- the battery packaging material of the present invention may be provided with a second adhesive layer 5 between the barrier layer 3 and the sealant layer 4 as necessary for the purpose of enhancing these adhesive properties.
- an insulating layer 6 may be provided on the outside of the base material layer 1 as necessary for the purpose of enhancing the insulating properties. Further, when the insulating layer 6 is provided, a third adhesive layer 7 may be provided between the base material layer 1 and the insulating layer 6 as necessary for the purpose of improving the adhesion. Good.
- a coating layer 8 may be provided as the outermost layer for the purpose of imparting functionality such as chemical resistance and slipping property, as necessary. That is, the coating layer 8 is provided on the outer surface of the base material layer 1 or on the outer surface of the insulating layer 6 when the insulating layer 6 is provided, as necessary.
- the base material layer 1 is a layer forming the outermost layer.
- the material for forming the base material layer 1 is not particularly limited as long as it has insulating properties. Examples of the material for forming the base material layer 1 include polyester, polyamide, epoxy, acrylic, fluororesin, polyurethane, silicon resin, phenol, polyetherimide, polyimide, and a mixture or copolymer thereof.
- polyester examples include polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polybutylene naphthalate, polyethylene isophthalate, polycarbonate, copolymer polyester mainly composed of ethylene terephthalate, butylene terephthalate as a repeating unit Copolyester etc. mainly composed of
- the copolymer polyester mainly composed of ethylene terephthalate is a copolymer polyester that polymerizes with ethylene isophthalate mainly composed of ethylene terephthalate (hereinafter, polyethylene (terephthalate / isophthalate)).
- polyethylene terephthalate / isophthalate
- polyethylene terephthalate / adipate
- polyethylene terephthalate / sodium sulfoisophthalate
- polyethylene terephthalate / sodium isophthalate
- polyethylene terephthalate / phenyl-dicarboxylate
- polyethylene terephthalate / decanedicarboxylate
- polyester mainly composed of butylene terephthalate as a repeating unit
- a copolymer polyester that polymerizes with butylene isophthalate having butylene terephthalate as a repeating unit hereinafter referred to as polybutylene (terephthalate / isophthalate).
- polybutylene (terephthalate / adipate) polybutylene (terephthalate / sebacate), polybutylene (terephthalate / decanedicarboxylate), polybutylene naphthalate and the like.
- These polyesters may be used individually by 1 type, and may be used in combination of 2 or more type.
- Polyester has the advantage of being excellent in electrolytic solution resistance and less likely to cause whitening due to the adhesion of the electrolytic solution, and is suitably used as a material for forming the base material layer 1.
- polyamides include aliphatic polyamides such as nylon 6, nylon 66, nylon 610, nylon 12, nylon 46, and a copolymer of nylon 6 and nylon 6,6; terephthalic acid and / or Or hexamethylenediamine-isophthalic acid-terephthalic acid copolymerized polyamides such as nylon 6I, nylon 6T, nylon 6IT, nylon 6I6T (I represents isophthalic acid, T represents terephthalic acid),
- An aromatic polyamide such as taxylylene adipamide (MXD6); an alicyclic polyamide such as polyaminomethylcyclohexyl adipamide (PACM6); and an isocyanate component such as a lactam component or 4,4′-diphenylmethane-diisocyanate Copolymerized polyamide, Examples thereof include polyesteramide copolymers and polyetheresteramide copolymers, which are copolymers of copolymerized polyamide and polyester or polyalkylene
- polyamides may be used individually by 1 type, and may be used in combination of 2 or more type.
- the stretched polyamide film is excellent in stretchability, can prevent whitening due to resin cracking of the base material layer 1 during molding, and is suitably used as a material for forming the base material layer 1.
- the base material layer 1 may be formed of a uniaxial or biaxially stretched resin film, or may be formed of an unstretched resin film. Among them, a uniaxially or biaxially stretched resin film, in particular, a biaxially stretched resin film has improved heat resistance by orientation crystallization, and thus is suitably used as the base material layer 1.
- the resin film forming the base layer 1 is preferably nylon or polyester, more preferably biaxially stretched nylon, biaxially stretched polyester, and particularly preferably biaxially stretched polyester.
- the base material layer 1 can be laminated with resin films of different materials in order to improve pinhole resistance and insulation when used as a battery package.
- resin films of different materials include a multilayer structure in which a polyester film and a nylon film are laminated, and a multilayer structure in which a biaxially stretched polyester and a biaxially stretched nylon are laminated.
- each resin film may be adhere
- a method of bonding in a hot melt state such as a co-extrusion method, a sand lamination method, or a thermal laminating method can be mentioned.
- the composition of the adhesive to be used is not particularly limited, but from the viewpoint of shortening the curing time to shorten the lead time, and further improving the moldability.
- the resin composition described in the column of [Adhesive layer 2] described later is used.
- the base material layer 1 may be made to have low friction in order to improve the moldability.
- the friction coefficient of the surface is not particularly limited, but for example, 1.0 or less can be mentioned.
- mat treatment, formation of a thin film layer of a slip agent, a combination thereof, and the like can be given.
- a matting agent is added to the base material layer 1 in advance to form irregularities on the surface, a transfer method by heating or pressurizing with an embossing roll, a surface is mechanically dry or wet blasting or filed.
- the method of ruining is mentioned.
- the matting agent include fine particles having a particle size of about 0.5 nm to 5 ⁇ m.
- the material of the matting agent is not particularly limited, and examples thereof include metals, metal oxides, inorganic substances, and organic substances.
- the shape of the matting agent is not particularly limited, and examples thereof include a spherical shape, a fiber shape, a plate shape, an indeterminate shape, and a balloon shape.
- the matting agent examples include talc, silica, graphite, kaolin, montmorilloid, montmorillonite, synthetic mica, hydrotalcite, silica gel, zeolite, aluminum hydroxide, magnesium hydroxide, zinc oxide, magnesium oxide, and aluminum oxide.
- matting agents may be used individually by 1 type, and may be used in combination of 2 or more type.
- these matting agents silica, barium sulfate, and titanium oxide are preferable from the viewpoint of dispersion stability and cost.
- the matting agent may be subjected to various surface treatments such as insulation treatment and high dispersibility treatment on the surface noodles.
- the thin film layer of the slip agent can be formed by depositing a slip agent on the surface of the base material layer 1 by bleeding out to form a thin layer, or by laminating the slip agent on the base material layer 1.
- the slip agent is not particularly limited.
- These slip agents may be used individually by 1 type, and may be used in combination of 2 or more type.
- the thickness of the base material layer 1 is, for example, 10 to 50 ⁇ m, preferably 15 to 30 ⁇ m.
- the adhesive layer 2 is a layer provided for adhering these layers between the base material layer 1 and the barrier layer 3, and includes a thermosetting resin, (A) a curing accelerator and an elastomer resin, or ( B) It is formed of a cured product of a resin composition containing reactive resin beads.
- the adhesive layer 2 is formed by curing (A) a resin composition having a specific composition containing a curing accelerator and an elastomer resin (Aspect A), so that aging under high-temperature conditions is not required during production. It can be cured in a short time and can be provided with excellent moldability and adhesion strength.
- the adhesive layer 2 is formed of a cured product of a resin composition containing a thermosetting resin and (B) reactive resin beads (Aspect B), and the reactive resin beads are combined with the thermosetting resin in the adhesive layer.
- the resin composition having the above specific composition for forming the adhesive layer 2 and containing the light-absorbing and exothermic substance in at least one layer in the laminate can generate heat.
- the adhesive layer 2 having excellent adhesion strength in a short time.
- thermosetting resin The resin composition used for forming the adhesive layer 2 contains a thermosetting resin. Any thermosetting resin may be used as long as it causes polymerization upon heating to form a polymer network structure and cure. Specific examples of thermosetting resins used for forming the adhesive layer 2 include epoxy resins, amino resins (melamine resins, benzoguanamine resins, etc.), acrylic resins, urethane resins, phenol resins, unsaturated polyester resins, alkyd resins. Etc.
- thermosetting resins may be used alone or in combination of two or more.
- thermosetting resins from the viewpoints of further shortening the curing time of the adhesive layer 2 and further improving moldability, preferably a urethane resin, an epoxy resin, more preferably a two-component curable urethane resin, A two-part curable epoxy resin, particularly preferably a two-part curable urethane resin is used.
- the two-component curable urethane resin examples include a combination of a polyol compound (main agent) and an isocyanate compound (curing agent).
- a polyol compound main agent
- an isocyanate compound curing agent
- an epoxy resin main agent
- Acid anhydrides amine compounds
- combinations of amino resins curing agents
- the polyol compound used as the main agent is not particularly limited, and examples thereof include polyester polyol, polyester polyurethane polyol, polyether polyol, polyether polyurethane polyol, and the like. These polyol compounds may be used individually by 1 type, and may be used in combination of 2 or more type.
- the isocyanate compound used as a curing agent is not particularly limited.
- polyisocyanate, its adduct, its isocyanurate modified, its carbodiimide modified, The allophanate modified body, the bullet modified body, etc. are mentioned.
- Specific examples of the polyisocyanate include diphenylmethane diisocyanate (MDI), polyphenylmethane diisocyanate (polymeric MDI), toluene diisocyanate (TDI), hexamethylene diisocyanate (HDI), and bis (4-isocyanatocyclohexyl) methane (H12MDI).
- MDI diphenylmethane diisocyanate
- polymeric MDI polyphenylmethane diisocyanate
- TDI toluene diisocyanate
- HDI hexamethylene diisocyanate
- H12MDI bis (4-isocyanatocyclohexyl) methane
- Aromatic diisocyanates such as isophorone diisocyanate (IPDI), 1,5-naphthalene diisocyanate (1,5-NDI), 3,3′-dimethyl-4,4′-diphenylene diisocyanate (TODI), xylene diisocyanate (XDI) Aliphatic diisocyanates such as tramethylene diisocyanate, hexamethylene diisocyanate, trimethylhexamethylene diisocyanate, isophorone diisocyanate DOO; 4,4'-methylenebis (cyclohexyl isocyanate), alicyclic diisocyanates such as isophorone diisocyanate.
- Specific examples of the adduct include those obtained by adding trimethylolpropane, glycol and the like to the polyisocyanate. These isocyanate compounds may be used individually by 1 type, and may be used in combination of 2 or more type.
- the resin composition used for formation of the contact bonding layer 2 contains a hardening accelerator.
- the resin composition used for formation of the contact bonding layer 2 contains a hardening accelerator as needed.
- the “curing accelerator” is a substance that does not form a crosslinked structure by itself, but promotes a crosslinking reaction of a thermosetting resin, and has an action of promoting a crosslinking reaction of a thermosetting resin. Is also a substance that may form a crosslinked structure.
- the type of curing accelerator is appropriately selected according to the thermosetting resin used.
- an amidine compound for example, an amidine compound, a carbodiimide compound, a ketimine compound, a hydrazine compound, a sulfonium salt, a benzothiazolium salt, a tertiary amine.
- an amidine compound for example, an amidine compound, a carbodiimide compound, a ketimine compound, a hydrazine compound, a sulfonium salt, a benzothiazolium salt, a tertiary amine.
- amidine compound is not particularly limited, and examples thereof include imidazole compounds, 1,8-diazabicyclo [5.4.0] undec-7ene (DBU), 1,5-diazabicyclo [4.3.0] none.
- Examples include 5-ene (DBN) and guanidine compounds.
- imidazole compound examples include 2-methylimidazole, 2-ethylimidazole, 2-undecylimidazole, 2,4-dimethylimidazole, 2-heptadecylimidazole, 1,2-dimethylimidazole, 1,2 -Diethylimidazole, 2-ethyl-4-methylimidazole, 2-phenylimidazole, 1-benzyl-2-phenylimidazole, 1-cyanoethyl-2-methylimidazole, 1-cyanoethyl-2-undecylimidazole, 1-benzyl- 2-methylimidazole, 2,4-diamino-6- [2′-methylimidazolyl- (1) ′]-ethyl-S-triazine, 2,4-diamino-6- [2′-ethyl-4′-methyl Imidazolyl- (1) ′]-ethyl-S-triazine, 2,4-didi
- the carbodiimide compound is not particularly limited.
- Specific examples of the ketone include methyl ethyl ketone, methyl isopropyl ketone, methyl tertiary butyl ketone, methyl cyclohexyl ketone, diethyl ketone, ethyl propyl ketone, ethyl butyl ketone, dipropyl ketone, dibutyl ketone, and diisobutyl ketone.
- the amine include aromatic polyamines such as o-phenylenediamine, m-phenylenediamine, p-phenylenediamine, m-xylylenediamine, diaminodiphenylmethane, diaminodiphenylsulfone, and diaminodiethyldiphenylmethane; ethylenediamine , Propylenediamine, butylenediamine, diethylenetriamine, triethylenetetramine, tetraethylenepentamine, pentaethylenehexamine, hexamethylenediamine, trimethylhexamethylenediamine, 1,2-propanediamine, iminobispropylamine, methyliminobispropylamine, etc.
- aromatic polyamines such as o-phenylenediamine, m-phenylenediamine, p-phenylenediamine, m-xylylenediamine, diaminodiphenylmethane, dia
- Aliphatic polyamines N-aminoethylpiperazine, 3-butoxyisopropylamine, and other monoamines and polyesters having an ether bond in the main chain Terbone diamines; alicyclic polyamines such as isophorone diamine, 1,3-bisaminomethylcyclohexane, 1-cyclohexylamino-3-aminopropane, 3-aminomethyl-3,3,5-trimethylcyclohexylamine; norbornane skeletons Diamines; polyamide amines having an amino group at the molecular end of the polyamide; 2,5-dimethyl-2,5-hexamethylenediamine, mensendiamine, 1,4-bis (2-amino-2-methylpropyl) piperazine, etc. Is given as a specific example. These ketimine compounds may be used individually by 1 type, and may be used in combination of 2 or more type.
- the hydrazine compound is not particularly limited, and examples thereof include dipic acid dihydrazide and isophthalic acid dihydrazide. These hydrazine compounds may be used individually by 1 type, and may be used in combination of 2 or more type.
- the sulfonium salt is not particularly limited.
- 4-acetophenyldimethylsulfonium hexafluoroantimonate 4-acetophenyldimethylsulfonium hexafluoroarsenate, dimethyl-4- (benzyloxycarbonyloxy) phenylsulfonium hexafluoroantimony
- Alkylsulfonium salts such as dimethyl-4- (benzoyloxy) phenylsulfonium hexafluoroantimonate, dimethyl-4- (benzoyloxy) phenylsulfonium hexafluoroarsenate; benzyl-4-hydroxyphenylmethylsulfonium hexafluoroantimonate, 4-acetoxyphenylbenzylmethylsulfonium hexafluoroantimonate, benzyl-4-methoxyphen Benzylsulfonium salts such as rumethyl
- the benzothiazolium salt is not particularly limited.
- Benzylbenzothiazolium salt may be used individually by 1 type, and may be used in combination of 2 or more type.
- the tertiary amine compound is not particularly limited, and examples thereof include trimethylamine, triethylamine, tripropylamine, tributylamine, triethylenediamine, 1,4-diazabicyclo [2.2.2] octane, quinuclidine, and 3-quinuclidinol. And aliphatic tertiary amines; aromatic tertiary amines such as dimethylaniline; and heterocyclic tertiary amines such as isoquinoline, pyridine, collidine, and betapicoline. These tertiary amine compounds may be used individually by 1 type, and may be used in combination of 2 or more type.
- the hard curing accelerator include those that function as thermal acid generators.
- a thermal acid generator is a substance that generates an acid by heating and functions as a curing accelerator.
- Specific examples of the curing accelerator that can function as a thermal acid generator include sulfonium salts and benzothiazolium salts.
- the curing accelerator is a thermal latent that is activated under a predetermined heating condition (for example, 80 to 160 ° C., preferably 100 to 120 ° C.) to promote the crosslinking reaction of the thermosetting resin.
- a predetermined heating condition for example, 80 to 160 ° C., preferably 100 to 120 ° C.
- the heat-latent substance include an epoxy adduct obtained by adding an epoxy compound to an amidine compound, a hydrazine compound, a tertiary amine compound, or the like.
- the curing accelerator does not function as a curing agent in a sealed state, that is, in a moisture blocking state, but the sealed state is opened and hydrolyzed under the presence of moisture as a curing agent.
- the hydrolytic latent substance include an epoxy adduct obtained by adding an epoxy compound to an amidine compound, a hydrazine compound, a tertiary amine compound, or the like.
- curing accelerators may be used alone or in combination of two or more.
- an amidine compound and a sulfonium salt are preferable, and an amidine compound is more preferable.
- thermosetting about content of the hardening accelerator in the resin composition used for formation of the contact bonding layer 2, although it sets suitably according to the kind of thermosetting resin to be used, the kind of hardening accelerator, etc., for example, thermosetting
- the total amount of the curing accelerator is 0.01 to 6 parts by weight, preferably 0.05 to 5 parts by weight, and more preferably 0.1 to 2 parts by weight with respect to 100 parts by weight of the conductive resin.
- the resin composition used for formation of the contact bonding layer 2 contains elastomer resin.
- the adhesive layer 2 is imparted with appropriate flexibility while suppressing shrinkage of the adhesive layer 2 during curing, and the battery packaging material has excellent moldability. Is possible.
- the resin composition used for forming the adhesive layer 2 it is possible to increase the adhesion strength between the base material layer 1 and the barrier layer 3 by coexisting a curing accelerator and an elastomer resin together with the curable resin. become.
- the elastomer resin used in the present invention has a functional group capable of cross-linking with the thermosetting resin and may be cross-linked with the thermosetting resin when cured. It may not have a group and may not be crosslinked with the thermosetting resin even when cured.
- the type of elastomer resin used in the present invention is not particularly limited.
- Polyolefin elastomers such as elastomers; styrene elastomers; polyester elastomers; urethane elastomers; acrylic elastomers; epoxy elastomers such as bisphenol A epoxy elastomers; polyester polyols, polyester polyurethane polyols, polyether polyols, polyether polyurethanes
- Polyol elastomers such as polyols; rubbers such as nitrile rubber, fluorine rubber, acrylic rubber, silicone rubber, chloroprene rubber, isoprene rubber, butadiene rubber Components and the like.
- These elastomer resins may be used individually by 1 type, and may be used in combination of 2 or more type.
- urethane-based elastomers urethane-based elastomers, epoxy-based elastomers, and polyol-based elastomers are preferable.
- the content of the elastomer resin in the resin composition used for forming the adhesive layer 2 is not particularly limited.
- the total amount of the elastomer resin is 3 to 50 parts by mass with respect to 100 parts by mass of the thermosetting resin.
- the resin composition used for forming the adhesive layer 2 may contain other additives such as a solvent and a light-absorbing exothermic substance described later, if necessary.
- the coloring agent may be contained as another additive.
- the colorant is not particularly limited, and known pigments and dyes can be used.
- the reactive resin beads are chemically bonded to the thermosetting resin in the adhesive layer 2 by including the reactive resin beads in the resin composition used for forming the adhesive layer 2. As a result, the moldability can be improved.
- the reactive resin beads are resin particles (filler) having a functional group that reacts with the thermosetting resin and chemically binds.
- the type of the functional group of the reactive resin bead used in the present invention is appropriately set according to the type of the thermosetting resin.
- examples thereof include a silyl group, an epoxy group, a polymerizable vinyl group, and a (meth) acryloyl group.
- the number of functional groups per one is not particularly limited, but from the viewpoint that the reactive resin beads are stably held in the adhesive layer and exhibit excellent moldability. It is preferable to have two or more functional groups per bead.
- the hydroxyl value is, for example, 1 to 100 KOHmg / g, preferably 5 to 80 KOHmg / g.
- the content of N ⁇ C ⁇ O is 1 to 10% by weight, preferably 3 to 8% by weight.
- the functional group equivalent is 100 to 5000, preferably 150 to 3000.
- the resin constituting the particles of the reactive resin beads is not particularly limited, and examples thereof include a urethane resin, an acrylic resin, a urethane acrylic resin, and a nylon resin. Among these, Preferably, a urethane resin and an acrylic resin are mentioned.
- the reactive resin beads of the present invention preferably include urethane beads having a hydroxyl group and / or an isocyanate group as functional groups, and acrylic beads having a hydroxyl group and / or an isocyanate group.
- the refractive index of the reactive resin beads is not particularly limited, but is 1.3 to 1.8, preferably 1.4 to 1.6 from the viewpoint of providing the adhesive layer with excellent transparency. Can be mentioned.
- the refractive index of the reactive resin beads is a value measured in accordance with the B method of JIS K7142 “Plastic refractive index measurement method”.
- the closer the refractive index of the reactive resin bead to the curable resin to be used the more difficult it is to visually recognize the presence of the reactive resin bead in the adhesive layer 2, and the adhesive layer can be provided with more excellent transparency. it can.
- the average particle diameter of the reactive resin beads is not particularly limited, but from the viewpoint of further improving the moldability, for example, 0.1 to 10 ⁇ m, preferably 0.2 to 5 ⁇ m may be mentioned.
- the average particle size of the reactive resin beads is measured by using the Shimadzu laser diffraction particle size distribution analyzer SALD-2100-WJA1 and using compressed air to inject the powder to be measured from the nozzle and into the air. It is a value measured by an injection-type dry measurement method that is measured by dispersing.
- Such reactive resin beads include Art Pearl C-TH series (urethane hydroxyl group-containing urethane beads), Art Pearl RU to RV series (reactive urethane beads to block NCO type), etc. (all of which are Negami Kogyo Co., Ltd.) Manufactured) are commercially available, and these commercially available products can also be used.
- These reactive resin beads may be used alone or in combination of two or more.
- the content of the reactive resin beads is appropriately set according to the type of the thermosetting resin used, the type of the reactive resin beads, etc.
- the total amount of reactive resin beads is 0.05 to 50 parts by mass, preferably 0.1 to 30 parts by mass, and more preferably 0.3 to 15 parts by mass with respect to 100 parts by mass of the thermosetting resin. .
- the resin composition used for forming the adhesive layer 2 may further contain a curing accelerator.
- a curing accelerator the adhesive layer 2 can be cured in a short time without requiring aging under high temperature conditions during production, and the lead time can be shortened.
- the kind and content of the curing accelerator can be the same as described above.
- the adhesive layer 2 when the adhesive layer 2 contains the light-absorbing and exothermic substance, the adhesive layer 2 may be formed by adding the light-absorbing and exothermic substance to the resin composition.
- the content of the light-absorbing and exothermic substance in the resin composition used for forming the adhesive layer 2 is not particularly limited.
- the total amount of the light-absorbing exothermic substance is 0.1 to 10 parts by mass, preferably 0.1 to 3 parts by mass.
- the adhesive layer 2 is imparted with appropriate flexibility while suppressing the adhesive layer 2 from shrinking at the time of curing. It becomes possible to make the packaging material for use excellent in formability.
- the thickness of the adhesive layer 2 is, for example, 2 to 50 ⁇ m, preferably 3 to 25 ⁇ m.
- the barrier layer 3 is a layer that functions as a barrier layer for preventing water vapor, oxygen, light, and the like from entering the battery, in addition to improving the strength of the packaging material.
- the material of the barrier layer 3 include metal foils such as aluminum, stainless steel, and titanium; films obtained by vapor deposition of inorganic compounds such as silicon oxide and alumina. Among these, metal foil is preferable, and aluminum foil is more preferable.
- soft aluminum foil for example, annealed aluminum (JIS A8021P-O) or (JIS A8079P-O) foil Etc. are preferably used.
- the thickness of the barrier layer 3 is not particularly limited.
- the thickness is usually 10 to 200 ⁇ m, preferably 20 to 100 ⁇ m.
- the barrier layer 3 When a metal foil is used as the barrier layer 3, at least one surface, preferably at least the surface on the sealant layer side, and more preferably both surfaces are subjected to chemical conversion treatment in order to stabilize adhesion, prevent dissolution and corrosion, and the like. It is preferable.
- the chemical conversion treatment is a treatment for forming an acid-resistant film on the surface of the barrier layer 3.
- Chemical conversion treatment is, for example, chromate chromate treatment using a chromic acid compound such as chromium nitrate, chromium fluoride, chromium sulfate, chromium acetate, chromium oxalate, chromium biphosphate, chromic acetyl acetate, chromium chloride, potassium sulfate chromium, etc. ; Phosphoric acid chromate treatment using a phosphoric acid compound such as sodium phosphate, potassium phosphate, ammonium phosphate, polyphosphoric acid; aminated phenol heavy consisting of repeating units represented by the following general formulas (1) to (4) Examples thereof include chromate treatment using a coalescence.
- a chromic acid compound such as chromium nitrate, chromium fluoride, chromium sulfate, chromium acetate, chromium oxalate, chromium biphosphate,
- X represents a hydrogen atom, a hydroxyl group, an alkyl group, a hydroxyalkyl group, an allyl group or a benzyl group.
- R 1 and R 2 are the same or different and represent a hydroxyl group, an alkyl group, or a hydroxyalkyl group.
- examples of the alkyl group represented by X, R 1 and R 2 include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, an isobutyl group, Examples thereof include a linear or branched alkyl group having 1 to 4 carbon atoms such as a tert-butyl group.
- Examples of the hydroxyalkyl group represented by X, R 1 and R 2 include a hydroxymethyl group, a 1-hydroxyethyl group, a 2-hydroxyethyl group, a 1-hydroxypropyl group, a 2-hydroxypropyl group, 3- A straight or branched chain having 1 to 4 carbon atoms substituted with one hydroxy group such as hydroxypropyl group, 1-hydroxybutyl group, 2-hydroxybutyl group, 3-hydroxybutyl group, 4-hydroxybutyl group An alkyl group is mentioned.
- X is preferably any one of a hydrogen atom, a hydroxyl group, and a hydroxyalkyl group.
- the number average molecular weight of the aminated phenol polymer comprising the repeating units represented by the general formulas (1) to (4) is, for example, about 500 to about 1,000,000, preferably about 1,000 to about 20,000.
- a metal oxide such as aluminum oxide, titanium oxide, cerium oxide, tin oxide or the like, in which fine particles of barium sulfate are dispersed in phosphoric acid, is coated.
- a method of forming a corrosion-resistant treatment layer on the surface of the metal foil by performing a baking treatment at a temperature of 0 ° C. or higher can be mentioned.
- a resin layer obtained by crosslinking a cationic polymer with a crosslinking agent may be formed on the corrosion-resistant treatment layer.
- the cationic polymer for example, polyethyleneimine, an ionic polymer complex composed of a polymer having polyethyleneimine and a carboxylic acid, a primary amine-grafted acrylic resin in which a primary amine is grafted on an acrylic main skeleton, polyallylamine, or Examples thereof include aminophenols and derivatives thereof.
- These cationic polymers may be used individually by 1 type, and may be used in combination of 2 or more type.
- the crosslinking agent include compounds having at least one functional group selected from the group consisting of isocyanate groups, glycidyl groups, carboxyl groups, and oxazoline groups, silane coupling agents, and the like. These crosslinking agents may be used alone or in combination of two or more.
- These chemical conversion treatments may be performed alone or in combination of two or more chemical conversion treatments. Furthermore, these chemical conversion treatments may be carried out using one kind of compound alone, or may be carried out using a combination of two or more kinds of compounds. Among these, chromic acid chromate treatment is preferable, and chromate treatment in which a chromic acid compound, a phosphoric acid compound, and the aminated phenol polymer are combined is more preferable.
- the amount of the acid-resistant film to be formed on the surface of the metal foil in the chemical conversion treatment is not particularly limited.
- the chromate treatment is performed by combining a chromic acid compound, a phosphoric acid compound, and the aminated phenol polymer, for example.
- the chromic acid compound is about 0.5 to about 50 mg, preferably about 1.0 to about 40 mg in terms of chromium
- the phosphorus compound is about 0.5 to about 50 mg in terms of phosphorus per 1 m 2 of the surface of the metal foil, preferably About 1.0 to about 40 mg
- the aminated phenol polymer is desirably contained in a proportion of about 1 to about 200 mg, preferably about 5.0 to 150 mg.
- a solution containing a compound used for forming an acid-resistant film is applied to the surface of the metal foil by a bar coating method, a roll coating method, a gravure coating method, a dipping method or the like, and then the temperature of the metal foil is 70. It is performed by heating to about 200 ° C.
- the metal foil may be subjected to a degreasing treatment by an alkali dipping method, an electrolytic cleaning method, an acid cleaning method, an electrolytic acid cleaning method, or the like in advance. By performing the degreasing treatment in this way, it becomes possible to more efficiently perform the chemical conversion treatment on the surface of the metal foil.
- the second adhesive layer 5 is a layer provided between the barrier layer 3 and the sealant layer 4 as necessary in order to firmly bond the barrier layer 3 and the sealant layer 4.
- the second adhesive layer 5 is formed of an adhesive that can bond the barrier layer 3 and the sealant layer 4 together.
- the composition of the adhesive used for forming the second adhesive layer 5 is not particularly limited, but it is preferable from the viewpoint of shortening the curing time to shorten the lead time and further improving the moldability. Includes the resin composition described in the section of [Adhesive layer 2].
- the resin composition used for forming the second adhesive layer 5 may contain the light-absorbing and exothermic substance.
- the content of the light-absorbing and exothermic substance in the resin composition used for forming the second adhesive layer 5 is the same as that for the resin composition used for forming the adhesive layer 2.
- the thickness of the second adhesive layer 5 is, for example, 1 to 40 ⁇ m, preferably 2 to 30 ⁇ m.
- the sealant layer 4 corresponds to the innermost layer, and is a layer that seals the battery element by heat-sealing the sealant layers when the battery is assembled.
- the resin component used for the sealant layer 4 is not particularly limited as long as it can be thermally welded, and examples thereof include polyolefin, cyclic polyolefin, carboxylic acid-modified polyolefin, and carboxylic acid-modified cyclic polyolefin.
- polystyrene resin examples include polyethylene such as low density polyethylene, medium density polyethylene, high density polyethylene, and linear low density polyethylene; homopolypropylene, polypropylene block copolymer (for example, block copolymer of propylene and ethylene), polypropylene Crystalline or amorphous polypropylene, such as a random copolymer of propylene and ethylene; an ethylene-butene-propylene terpolymer; and the like.
- polyethylene and polypropylene are preferable.
- the cyclic polyolefin is a copolymer of an olefin and a cyclic monomer
- examples of the olefin that is a constituent monomer of the cyclic polyolefin include ethylene, propylene, 4-methyl-1-pentene, styrene, butadiene, and isoprene. Is mentioned.
- Examples of the cyclic monomer that is a constituent monomer of the cyclic polyolefin include cyclic alkenes such as norbornene; specifically, cyclic dienes such as cyclopentadiene, dicyclopentadiene, cyclohexadiene, and norbornadiene.
- cyclic alkene is preferable, and norbornene is more preferable.
- the carboxylic acid-modified polyolefin is a polymer obtained by modifying the polyolefin with a carboxylic acid.
- Examples of the carboxylic acid used for modification include maleic acid, acrylic acid, itaconic acid, crotonic acid, maleic anhydride, itaconic anhydride and the like.
- the carboxylic acid-modified cyclic polyolefin is obtained by copolymerizing a part of the monomer constituting the cyclic polyolefin in place of the ⁇ , ⁇ -unsaturated carboxylic acid or its anhydride, or ⁇ , ⁇ with respect to the cyclic polyolefin.
- -A polymer obtained by block polymerization or graft polymerization of an unsaturated carboxylic acid or its anhydride.
- the cyclic polyolefin to be modified with carboxylic acid is the same as described above.
- the carboxylic acid used for modification is the same as that used for modification of the acid-modified cycloolefin copolymer.
- these resin components preferably a crystalline or amorphous polyolefin, a cyclic polyolefin, and a blend polymer thereof; more preferably polyethylene, polypropylene, a copolymer of ethylene and norbornene, and two or more of these The blend polymer of these is mentioned.
- the sealant layer 4 may be formed of one kind of resin component alone, or may be formed of a blend polymer in which two or more kinds of resin components are combined. Furthermore, the sealant layer may be formed of only one layer, but may be formed of two or more layers using the same or different resin components.
- the thickness of the sealant layer 4 is not particularly limited, but may be 2 to 2000 ⁇ m, preferably 5 to 1000 ⁇ m, and more preferably 10 to 500 ⁇ m.
- the insulating layer 6 is a layer provided as needed on the outer side of the base material layer 1 (on the side opposite to the adhesive layer 2) in order to enhance insulation.
- the insulating material used for forming the insulating layer 6 is not particularly limited as long as it has insulating properties and flexibility enough to follow when bent.
- fluororesin, polyester resin, epoxy resin, melamine resin, phenol examples thereof include organic insulating materials such as resins, polyurethane resins, silicone resins, polyethylene resins, polyvinyl chloride, acrylic resins and cardo resins; inorganic insulating materials such as silicon oxide and silicon nitride. These insulating materials may be used individually by 1 type, and may be used in combination of 2 or more type.
- the light-absorbing and exothermic substance may be mixed with the insulating material used for forming the insulating layer 6.
- the content of the light-absorbing and exothermic substance in the insulating layer 6 is not particularly limited.
- the light-absorbing and exothermic substance is 0.1 to 10 parts by mass, preferably about 0.1 parts by mass per 100 parts by mass of the insulating material contained in the insulating layer 6. 1 to 3 parts by mass can be mentioned.
- the thickness of the insulating layer 6 is, for example, 0.1 to 10 ⁇ m, preferably 0.5 to 4 ⁇ m.
- the insulating layer 6 may be laminated on the outside of the base layer 1 by a method such as a gravure coating method or a roll coating method. Further, when the third adhesive layer 7 is provided between the base material layer 1 and the insulating layer 6, it is formed outside the base material layer 1 by a coextrusion lamination method, a thermal lamination method, a thermal lamination method, a sand lamination method, or the like. The third adhesive layer 7 and the insulating layer 6 may be laminated.
- the third adhesive layer 7 is a layer provided between the base layer 1 and the insulating layer 6 as necessary in order to enhance the adhesion between the base layer 1 and the insulating layer 6.
- the third adhesive layer 7 is formed of a resin composition capable of bonding the base material layer 1 and the insulating layer 6 together.
- the composition of the resin composition used for forming the third adhesive layer 7 is the same as that of the resin composition used for forming the second adhesive layer 5.
- the resin composition used for forming the third adhesive layer 7 may contain the light-absorbing and exothermic substance.
- the content of the light-absorbing and exothermic substance in the resin composition used for forming the third adhesive layer 7 is the same as that for the resin composition used for forming the adhesive layer 2.
- the thickness of the third adhesive layer 7 is the same as that of the second adhesive layer 5.
- the third adhesive layer 7 can be laminated by a coating method such as a gravure coating method or a roll coating method.
- the coating layer 8 is provided on the outer side of the base material layer 1 (on the side opposite to the adhesive layer 2) for the purpose of imparting functionality such as chemical resistance, slip resistance, and scratch resistance. Or when providing the insulating layer 6, it is a layer provided as needed outside the insulating layer 6 (the side opposite to the base material layer 1).
- the coating layer 8 is formed of a cured product of a resin composition containing a curable resin.
- the resin composition used for forming the coating layer 8 include a resin composition containing a thermosetting resin, and more preferably a resin composition containing a thermosetting resin and a curing accelerator. It is done.
- the types and contents of the thermosetting resin and the curing accelerator contained in the resin composition are the same as those of the resin composition used for forming the adhesive layer 2.
- the coating layer 8 may contain additives such as slip agents and matting agents depending on the functionality to be imparted. Further, the coating layer 8 may contain a colorant.
- the matting agent is not particularly limited, and examples thereof include those exemplified for the base material layer 1. Although it does not restrict
- a chemical resistant coating agent may be used.
- the coating layer 8 contains a light-absorbing and exothermic substance
- the light-absorbing and exothermic substance may be contained in the resin composition used for forming the coating layer 8.
- the content of the light-absorbing and exothermic substance in the resin composition used for forming the coating layer 8 is the same as that for the resin composition used for forming the adhesive layer 2.
- the thickness of the coating layer 8 is, for example, 1 to 10 ⁇ m, preferably 2 to 5 ⁇ m.
- the coating layer 8 can be laminated by a coating method such as a gravure coating method or a roll coating method.
- At least one layer may contain a light-absorbing heat-generating substance (Aspect C).
- a light-absorbing heat-generating substance Aspect C.
- the light-absorbing exothermic substance is contained in at least one of the base material layer 1, the adhesive layer 2, the barrier layer 3, the sealant layer 4, and other layers provided as necessary. It only has to be included. Specifically, if at least one of the second adhesive layer 5, the insulating layer 6, the third adhesive layer 7, and the coating layer 8 is provided, the light-absorbing exothermic material is at least one of these layers. And may be contained in at least one of the base material layer 1, the adhesive layer 2, the barrier layer 3, and the sealant layer 4.
- the adhesive layer 2 is preferably used as the layer containing the light-absorbing exothermic material, and the second adhesive provided as necessary. At least one of the layer 5, the insulating layer 6 provided as needed, the third adhesive layer 7 provided as needed, and the coating layer 8 provided as needed; more preferably the adhesive layer 2, At least one of the second adhesive layer 5 provided as necessary, the third adhesive layer 7 provided as necessary, and the coating layer 8 provided as needed; particularly preferably the adhesive layer 2 It is done.
- the light absorption exothermic substance is a substance that generates heat by absorbing at least a part of light having a wavelength of about 300 to 2000 nm.
- the light-absorbing exothermic substance used in the present invention is not particularly limited, and examples thereof include metal powder, inorganic pigment, carbon, and organic dye.
- metal powders such as aluminum, stainless steel, iron, titanium, tungsten, nickel, and alloys thereof. These metal powders may be used individually by 1 type, and may be used in combination of 2 or more type.
- the inorganic pigment examples include zinc oxide, titanium oxide, barium sulfate, aluminum borate, potassium titanate, iridium oxide, tin oxide, and composites thereof. These inorganic pigments have a property of generating heat by absorbing far-infrared light, mid-infrared light, and near-infrared light. These inorganic pigments may be used alone or in combination of two or more.
- Specific examples of the carbon include carbon black.
- organic dyes include methine dyes, cyanine dyes, merocyanine dyes, mercurochrome dyes, xanthene dyes, porphyrin dyes, phthalocyanine dyes (copper phthalocyanine, etc.), azo dyes, and coumarin dyes. . You may use individually by 1 type and may be used in combination of 2 or more type.
- carbon, metal powder, more preferably carbon black, titanium powder, aluminum powder, iron powder, tungsten powder, stainless steel powder, nickel powder, and more preferably carbon black are mentioned.
- the average particle diameter of the light-absorbing exothermic substance is not particularly limited, but for example, it is 1000 nm or less, preferably 10 to 1000 nm.
- the average particle diameter of the light-absorbing and exothermic substance means an average value when the particle diameters of primary particles of 1000 light-absorbing and exothermic substances are measured using a transmission electron microscope.
- the content of the light-absorbing and exothermic substance may be appropriately set according to the type of the light-absorbing and exothermic substance, the type and number of layers containing the light-absorbing and exothermic substance, A range in which the content of the light-absorbing and exothermic substance is about 4 to 200 ⁇ g per 1 m 2 of the battery packaging material of the present invention is mentioned.
- the method for producing the battery packaging material of the present invention is not particularly limited as long as a laminate in which layers having a predetermined composition are laminated is obtained.
- the following method is exemplified. .
- the base material layer 1 and the adhesive layer 2 are obtained by heating and curing the resin composition in a state where the base material layer and the barrier layer are bonded to each other through the resin composition used for forming the adhesive layer 2. Then, a stacked body in which the barrier layers 3 are sequentially stacked (hereinafter may be referred to as “laminated body A”) is formed.
- the layered product A is formed by applying a resin composition used for forming the adhesive layer 2 on the base layer 1 or the barrier layer 3 whose surface is subjected to chemical conversion treatment, if necessary, a gravure coating method, After applying and drying by an application method such as a roll coating method, the barrier layer 3 or the base material layer 1 can be laminated and the adhesive layer 2 can be cured by a dry lamination method.
- the curing conditions for the adhesive layer 2 include, for example, 150 to 200 ° C., preferably 160 to 190 ° C., for 1 to 60 seconds, preferably 1 to 30 seconds. In the present invention, aging under high temperature conditions is not required for curing the adhesive layer 2, and the adhesive layer 2 can be sufficiently cured only under the above-mentioned curing conditions, so the lead time is significantly shortened as compared with the prior art. can do.
- the curing conditions for the adhesive layer 2 may be set as appropriate depending on the type of thermosetting resin and the presence or absence of a curing accelerator. Good. For example, in the case where the resin composition forming the adhesive layer 2 does not contain a curing accelerator, it may be 25 to 100 ° C., preferably 30 to 80 ° C., 1 to 10 days, preferably 2 to 7 days. . In the case where the resin composition forming the adhesive layer 2 contains a curing accelerator, it may be 90 to 200 ° C., preferably 100 to 190 ° C., for 1 to 60 seconds, preferably 1 to 30 seconds.
- the resin composition used for forming the adhesive layer 2 contains reactive resin beads
- Curing does not require aging under high-temperature conditions, and the adhesive layer 2 can be sufficiently cured only under the above-mentioned curing conditions, so that the lead time can be significantly shortened as compared with the prior art.
- the sealant layer 4 is laminated on the barrier layer 3 of the laminate A.
- the resin component constituting the sealant layer 4 may be applied on the barrier layer 3 of the laminate A by a method such as gravure coating or roll coating.
- the second adhesive layer 5 is provided between the barrier layer 3 and the sealant layer 4, for example, (1) the second adhesive layer 5 and the sealant layer 4 are coextruded on the barrier layer 3 of the laminate A.
- a laminated body in which the second adhesive layer 5 and the sealant layer 4 are laminated is formed, and this is formed on the barrier layer 3 of the laminated body A by a thermal lamination method.
- the adhesive for forming the second adhesive layer 5 is laminated by an extrusion method, a solution-coated high temperature drying or baking method, and the like.
- a laminate composed of the base material layer 1 / adhesive layer 2 / barrier layer 3 whose surface is subjected to chemical conversion treatment as necessary / second adhesive layer 5 / sealant layer 4 provided as necessary is formed. Is done.
- each layer constituting the laminate improves or stabilizes film forming properties, lamination processing, suitability for final processing (pouching, embossing), etc., as necessary. Therefore, surface activation treatment such as corona treatment, blast treatment, oxidation treatment, ozone treatment may be performed.
- the case where the light-absorbing exothermic substance is used is not particularly limited as long as a laminate in which layers having a predetermined composition are laminated is obtained.
- the base material layer 1, the adhesive layer 2, the barrier layer 3, and the sealant layer 4 is laminated in this order, and the following laminating process includes the following first and second processes.
- 1st process It is a laminated body which has at least the base material layer 1, uncured adhesive layer 2 ', and the barrier layer 3 in this order, Comprising:
- the said uncured adhesive layer 2' is a thermosetting resin and a hardening accelerator.
- Second step The laminated body obtained in the first step is heated while being irradiated with light having a wavelength capable of generating heat by the light-absorbing exothermic substance, and the thermosetting contained in the uncured adhesive layer 2 ′.
- the uncured adhesive layer 2 ′ is converted into the adhesive layer 2 by curing the resin.
- the laminate has a base layer 1, an uncured adhesive layer 2 ′, and a barrier layer 3 in this order, and the uncured adhesive layer 2 ′ comprises a thermosetting resin, a curing accelerator, And at least one layer included in the laminate forms a laminate (hereinafter also referred to as “laminate A”) containing a light-absorbing and exothermic substance.
- the uncured adhesive layer 2 ′ is a layer in a state where the adhesive layer 2 is not cured, and is formed of a resin composition containing a curable resin and a curing accelerator.
- the laminate A is specifically formed by applying a resin composition used for forming the adhesive layer 2 on the base layer 1 or on the barrier layer 3 whose surface is subjected to chemical conversion treatment as necessary. It can be performed by a dry lamination method in which the barrier layer 3 or the substrate layer 1 is laminated after being applied and dried by a coating method such as a gravure coating method or a roll coating method.
- the laminate A having at least these three layers is subjected to the second step.
- a laminate A in which the sealant layer 4 and other layers laminated as necessary may be laminated for the second step.
- the uncured adhesive layer 2 ′, and the barrier layer 3 contains a light-absorbing and exothermic substance
- a layer containing a light-absorbing and exothermic substance is further laminated on these layers.
- the laminated body A may be subjected to the second step.
- the laminated body obtained in the first step is heated while being irradiated with light having a wavelength capable of generating heat by the light-absorbing exothermic substance, and the thermosetting contained in the uncured adhesive layer 2 ′.
- the uncured adhesive layer 2 ′ is converted into the adhesive layer 2 by curing the conductive resin.
- the light irradiation conditions for curing the uncured adhesive layer 2 ′ are such that the light-absorbing exothermic material contained in the laminate obtained in the first step generates heat to such an extent that the curing reaction of the thermosetting resin can proceed.
- the wavelength and output density of the light may be set, and are set as appropriate based on the type of the light-absorbing exothermic substance to be used, heat generation, and the like.
- the output density of light having a wavelength capable of generating heat by the light-absorbing exothermic substance is usually 1 to 10 W ⁇ m ⁇ 2 , preferably 3 to 9 W ⁇ m ⁇ 2, more preferably 5 to 8 W ⁇ m- 2 .
- the wavelength of light irradiated when the uncured adhesive layer 2 ′ is cured may be in a range in which the light-absorbing and exothermic substance contained in the laminate obtained in the first step can generate heat.
- the light-absorbing and exothermic substance is carbon, it may be irradiated with light having a wavelength including mid-infrared light or near-infrared light.
- the light-absorbing and exothermic substance is a metal powder, an inorganic pigment, or an organic dye, If so, light having a wavelength including far-infrared light, mid-infrared light, or near-infrared light may be irradiated.
- the light irradiation when the uncured adhesive layer 2 ′ is cured is preferably irradiation with a halogen lamp.
- the light irradiation is performed by setting a light source so that light is exposed to the light-absorbing exothermic substance. For example, if the light-absorbing exothermic substance is contained in a layer outside the barrier layer, the light irradiation is performed by installing a light source on the base material layer 1 side and irradiating light from the base material layer 1 side. Done. If the light-absorbing exothermic substance is contained in a layer outside the barrier layer, light irradiation is performed by installing a light source on the sealant layer 4 side and irradiating light from the sealant layer 4 side. .
- the heating conditions for curing the uncured adhesive layer 2 ′ include, for example, 150 to 200 ° C., preferably 160 to 190 ° C., and 0.1 to 60 seconds, preferably 1 to 30 seconds.
- aging under high temperature conditions is not required for curing of the uncured adhesive layer 2 ′, and the adhesive layer 2 having excellent adhesion strength can be formed only under the above conditions. Lead time can be greatly shortened.
- the sealant layer 4 is laminated on the barrier layer 3 of the laminate obtained after the second step.
- a battery packaging material is obtained.
- the battery packaging material of the present invention is used as a packaging material for sealing and housing battery elements such as a positive electrode, a negative electrode, and an electrolyte.
- a battery element including at least a positive electrode, a negative electrode, and an electrolyte is formed using the battery packaging material of the present invention, with the metal terminals connected to each of the positive electrode and the negative electrode protruding outward.
- a battery using a battery packaging material is formed by covering the periphery of the element so that a flange portion (a region where the sealant layers are in contact with each other) can be formed, and heat-sealing and sealing the sealant layers of the flange portion.
- the battery packaging material of the present invention is used such that the sealant portion is on the inner side (surface in contact with the battery element).
- the battery packaging material of the present invention may be used for either a primary battery or a secondary battery, but is preferably a secondary battery.
- the type of secondary battery to which the battery packaging material of the present invention is applied is not particularly limited.
- a lithium ion battery, a lithium ion polymer battery, a lead battery, a nickel / hydrogen battery, a nickel / cadmium battery , Nickel / iron livestock batteries, nickel / zinc livestock batteries, silver oxide / zinc livestock batteries, metal-air batteries, polyvalent cation batteries, capacitors, capacitors and the like are suitable applications for the battery packaging material of the present invention.
- Example 1A-16A and Comparative Example 1A-10A (Aspect A: When the adhesive layer is a cured product of a resin composition containing a thermosetting resin, (A) a curing accelerator, and an elastomer resin) [Manufacture of packaging material for batteries A] On the base material layer 1 made of a biaxially stretched nylon film (thickness 25 ⁇ m), a barrier layer 3 made of an aluminum foil (thickness 40 ⁇ m) subjected to chemical conversion treatment on both surfaces was laminated by a dry lamination method.
- the resin compositions shown in Tables 1A to 4A were applied to one surface of an aluminum foil so as to have a thickness of 4 ⁇ m, and the substrate layer 1 was pressure-heat bonded to the following, Under such curing conditions, the resin composition was cured to prepare a base material layer 1 / adhesive layer 2 / barrier layer 3 laminate.
- Curing condition A 7 days at 80 ° C
- Curing condition B 30 seconds at 160 ° C.
- Curing condition C 190 ° C. for 30 seconds
- the chemical conversion treatment of the aluminum foil used as the barrier layer 3 is performed by rolling a treatment liquid composed of a phenol resin, a chromium fluoride compound, and phosphoric acid so that the coating amount of chromium is 10 mg / m 2 (dry weight).
- the coating was applied to both surfaces of the aluminum foil and baked for 20 seconds under the condition that the film temperature was 180 ° C. or higher.
- a carboxylic acid-modified polypropylene (arranged on the barrier layer side, thickness 23 ⁇ m) and homopolypropylene (innermost layer, thickness 23 ⁇ m) are coextruded to form the barrier layer 3
- a two-layer sealant layer was laminated thereon.
- a battery packaging material comprising a laminate in which the base material layer 1 / adhesive layer 2 / barrier layer 3 / sealant layer 4 (carboxylic acid-modified polypropylene layer / homopolypropylene layer) were sequentially laminated was obtained.
- Example 1B-58B and Comparative Example 1B-4B (Aspect B: When the adhesive layer is a cured product of a resin composition containing a thermosetting resin and (B) reactive resin beads) [Manufacture of battery packaging materials 1B]
- a barrier layer 3 made of an aluminum foil (thickness 40 ⁇ m) subjected to chemical conversion treatment on both surfaces was laminated by a dry lamination method.
- a resin composition A having the following composition is applied to one surface of an aluminum foil so that the thickness after curing is 4 ⁇ m, and a base material layer is pressure-heated and bonded thereon, followed by 80 The resin composition was cured at 7 ° C.
- the chemical conversion treatment of the aluminum foil used as the barrier layer 3 is performed by rolling a treatment liquid composed of a phenol resin, a chromium fluoride compound, and phosphoric acid so that the coating amount of chromium is 10 mg / m 2 (dry weight).
- the coating was applied to both surfaces of the aluminum foil and baked for 20 seconds under the condition that the film temperature was 180 ° C. or higher.
- the carboxylic acid-modified polypropylene (arranged on the barrier layer side, thickness 23 ⁇ m) and homopolypropylene (innermost layer, thickness 23 ⁇ m) are coextruded to form the barrier layer 3
- a two-layer sealant layer was laminated on the substrate.
- a battery packaging material comprising a laminate in which a base material layer / adhesive layer / barrier layer / sealant layer was laminated in order was obtained.
- thermosetting resin main agent: urethane polyol, curing agent: diphenylmethane diisocyanate
- Resin beads Predetermined amounts shown in Tables 1B to 4B (Resin beads shown in Tables 1B to 4B)
- thermosetting resin main agent: urethane polyol, curing agent: diphenylmethane diisocyanate
- Curing accelerator 1 part by mass (imidazole compound that promotes crosslinking reaction of thermosetting resin at 80-150 °C)
- Resin beads Predetermined amounts shown in Tables 1B to 4B (Resin beads shown in Tables 1B to 4B)
- the incidence of pinholes and cracks was determined when molding was performed when 100 test samples were molded under the above-mentioned conditions by determining that pinholes or cracks were observed even at one location after molding as above.
- the proportion of defective products was determined, and the case where the proportion of molding defects was less than 5% was judged as acceptable, and the case where the proportion of molding defects was 5% or more was judged as unacceptable.
- the moldability was similarly evaluated using the battery packaging material produced in the same manner as described above except that no resin beads were added to the resin composition forming the adhesive layer. The obtained results were judged according to the following criteria, and the moldability improvement effect was evaluated.
- Example 1C-35C and Comparative Example 1C-15C (when using a light - absorbing exothermic substance) [Manufacture of battery packaging materials]
- a barrier layer 3 made of an aluminum foil (thickness 40 ⁇ m) subjected to chemical conversion treatment on both surfaces was laminated by a dry lamination method.
- the resin compositions shown in Tables 1C to 4C were applied to one surface of the aluminum foil to form an uncured adhesive layer 2 ′ (thickness 4 ⁇ m) on the barrier layer 3.
- thermosetting resin in the uncured adhesive layer 2 ′ is cured under the following curing conditions, and the base material layer A laminate of 1 / adhesive layer 2 / barrier layer 3 was prepared.
- Curing condition A 7 days at 60 ° C. without reaching light
- Curing condition B 1 second at an ultimate temperature of 190 ° C. while irradiating light with an irradiation output of 7.2 W ⁇ cm ⁇ 2 using a halogen lamp as a light source from the base material layer 1 side
- Curing condition C 1 second at an ultimate temperature of 140 ° C. while irradiating light from the base material layer 1 side with a halogen lamp as a light source at an irradiation output of 4.0 W ⁇ cm ⁇ 2
- the chemical conversion treatment of the aluminum foil used as the barrier layer 3 is performed by rolling a treatment liquid composed of a phenol resin, a chromium fluoride compound, and phosphoric acid so that the coating amount of chromium is 10 mg / m 2 (dry weight).
- the coating was applied to both surfaces of the aluminum foil and baked for 20 seconds under the condition that the film temperature was 180 ° C. or higher.
- a carboxylic acid-modified polypropylene (arranged on the barrier layer side, thickness 23 ⁇ m) and homopolypropylene (innermost layer, thickness 23 ⁇ m) are coextruded to form the barrier layer 3
- a two-layer sealant layer was laminated thereon.
- a battery packaging material comprising a laminate in which the base material layer 1 / adhesive layer 2 / barrier layer 3 / sealant layer 4 (carboxylic acid-modified polypropylene layer / homopolypropylene layer) were sequentially laminated was obtained.
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Abstract
Description
本発明は、かかる知見に基づいて更に検討を重ねることにより完成したものである。
項1. 少なくとも、基材層、接着層、バリア層、及びシーラント層をこの順に有する積層体からなり、
前記接着層が、熱硬化性樹脂と、(A)硬化促進剤及びエラストマー樹脂、または(B)反応性樹脂ビーズとを含有する樹脂組成物の硬化物であることを特徴とする、電池用包装材料。
項2. 前記接着層が、(B)反応性樹脂ビーズ及び硬化促進剤を含有する樹脂組成物の硬化物である、項1に記載の電池用包装材料。
項3. 前記反応性樹脂ビーズが、官能基を有するウレタン樹脂ビーズ又はアクリル樹脂ビーズである、項1又は2に記載の電池用包装材料。
項4. 前記反応性樹脂ビーズの屈折率が1.3~1.8である、項1~3のいずれかに記載の電池用包装材料。
項5. 前記積層体に含まれる少なくとも1つの層が、吸光発熱物質を含有する、項1~4のいずれかに記載の電池用包装材料。
項6. 前記接着層が、吸光発熱物質を含有する、項1~5のいずれかに記載の電池用包装材料。
項7. 前記吸光発熱物質が、金属粉末、無機顔料、カーボン、及び有機色素よりなる群から選択される少なくとも1種である、項6に記載の電池用包装材料。
項8. 前記接着層とは反対側の基材層上に、基材層側から、第3接着層、絶縁層、及びコーティング層をこの順に有し、
前記コーティング層、絶縁層、第3接着層、基材層、接着層、及びシーラント層よりなる群から選択される少なくとも1つの層が、吸光発熱物質を含有する、項6又は7に記載の電池用包装材料。
項9. 前記熱硬化性樹脂が、エポキシ樹脂、アミノ樹脂、アクリル樹脂、ウレタン樹脂、フェノール樹脂、不飽和ポリエステル樹脂、及びアルキド樹脂よりなる群から選択される少なくとも1種である、項1~8のいずれかに記載の電池用包装材料。
項10. 前記硬化促進剤が、アミジン化合物、カルボジイミド化合物、ケチミン化合物、ヒドラジン化合物、スルホニウム塩、ベンゾチアゾリウム塩、及び第3級アミン化合物よりなる群から選択される少なくとも1種である、項1~9のいずれかに記載の電池用包装材料。
項11. 前記バリア層が金属箔である、項1~10のいずれかに記載の電池用包装材料。
項12. 下記工程を含む、電池用包装材料の製造方法。
熱硬化性樹脂と、(A)硬化促進剤及びエラストマー樹脂、又は(B)反応性樹脂ビーズとを含有する樹脂組成物を介して基材層とバリア層を貼り合わせた状態で加熱することにより、当該樹脂組成物を硬化させて、基材層、接着層、及びバリア層をこの順に有する積層体を得る工程、並びに
前記工程で得られた積層体のバリア層上に、シーラント層を積層させる工程。
項13. 少なくとも、基材層、接着層、バリア層、及びシーラント層をこの順に積層させる積層工程を含み、当該積層工程中に、下記第1工程及び第2工程を含む、電池用包装材料の製造方法:
少なくとも、基材層、未硬化接着層、及びバリア層をこの順に有する積層体であって、前記未硬化接着層が、(A)硬化促進剤及びエラストマー樹脂、または(B)反応性樹脂ビーズとを含有する樹脂組成物であり、且つ前記積層体に含まれる少なくとも1つの層が吸光発熱物質を含有する積層体を形成する第1工程、並びに
前記第1工程で得られた積層体に対して、前記吸光発熱物質が発熱可能な波長の光を照射しつつ加熱して、前記未硬化接着層に含まれる熱硬化性樹脂を硬化させることにより、前記未硬化接着層を接着層に変換する第2工程。
項14. 少なくとも正極、負極、及び電解質を備えた電池素子が、項1~11のいずれかに記載の電池用包装材料内に収容されている、電池。
電池用包装材料は、図1に示すように、少なくとも、基材層1、接着層2、バリア層3、及びシーラント層4をこの順に有する積層体からなる積層構造を有する。即ち、本発明の電池用包装材料は、基材層1が最外層になり、シーラント層4が最内層になる。電池の組み立て時に、電池素子の周縁に位置するシーラント層4同士を接面させて熱溶着することにより電池素子が密封され、電池素子が封止される。
[基材層1]
本発明の電池用包装材料において、基材層1は最外層を形成する層である。基材層1を形成する素材については、絶縁性を備えるものであることを限度として特に制限されるものではない。基材層1を形成する素材としては、例えば、ポリエステル、ポリアミド、エポキシ、アクリル、フッ素樹脂、ポリウレタン、珪素樹脂、フェノール、ポリエーテルイミド、ポリイミド、及びこれらの混合物や共重合物等が挙げられる。
接着層2は、基材層1とバリア層3との間に、これらの層を接着させるために設けられる層であり、熱硬化性樹脂と、(A)硬化促進剤及びエラストマー樹脂、または(B)反応性樹脂ビーズとを含有する樹脂組成物の硬化物で形成される。このように接着層2を、(A)硬化促進剤及びエラストマー樹脂を含有する特定組成の樹脂組成物を硬化させて形成する(態様A)ことにより、製造時に高温条件でのエージングを要することなく短時間で硬化でき、しかも優れた成形性及び密着強度を備えさせることが可能になる。
接着層2の形成に使用される樹脂組成物は、熱硬化性樹脂を含有する。熱硬化性樹脂は、加熱すると重合を起こして高分子の網目構造を形成して硬化するものであればよい。接着層2の形成に使用される熱硬化性樹脂として、具体的には、エポキシ樹脂、アミノ樹脂(メラミン樹脂、ベンゾグアナミン樹脂等)、アクリル樹脂、ウレタン樹脂、フェノール樹脂、不飽和ポリエステル樹脂、アルキド樹脂等が挙げられる。
上記のとおり、態様Aにおいては、接着層2の形成に使用される樹脂組成物は、硬化促進剤を含有する。また、態様B及び態様Cにおいても、接着層2の形成に使用される樹脂組成物は、必要に応じて硬化促進剤を含有する。このように、熱硬化性樹脂と共に硬化促進剤を共存させることにより、製造時に高温条件でのエージングを要することなく短時間で硬化させて、リードタイムの短縮が可能になる。
上記のとおり、態様Aにおいては、接着層2の形成に使用される樹脂組成物は、エラストマー樹脂を含有する。このようにエラストマー樹脂を含有させることにより、接着層2が硬化時に収縮するのを抑制しつつ、接着層2に適度な柔軟性を付与し、電池用包装材料に優れた成形性を備えさせることが可能になる。また、接着層2の形成に使用される樹脂組成物において、硬化性樹脂と共に、硬化促進剤とエラストマー樹脂を共存させることによって、基材層1とバリア層3間の密着強度を高めることが可能になる。
接着層2の形成に使用される樹脂組成物には、前述する成分の他に、必要に応じて、溶剤、後述する吸光発熱物質等の他の添加剤が含まれてもよい。また、他の添加剤として、着色剤が含まれていてもよい。着色剤としては特に制限されず、公知の顔料、染料などを使用することができる。
上記のとおり、態様Bにおいては、接着層2の形成に使用される樹脂組成物に反応性樹脂ビーズを含有させることにより、接着層2で反応性樹脂ビーズが熱硬化性樹脂と化学的に結合され、成形性を向上させることが可能になる。
上記のとおり、態様Cにおいて、接着層2に吸光発熱物質を含有させる場合、上記の樹脂組成物に吸光発熱物質を含有させて接着層2を形成すればよい。
接着層2の厚さについては、例えば、2~50μm、好ましくは3~25μmが挙げられる。
本発明の電池用包装材料において、バリア層3は、包装材料の強度向上の他、電池内部に水蒸気、酸素、光等が侵入するのを防止するためのバリア層として機能する層である。バリア層3の材質としては、具体的には、アルミニウム、ステンレス、チタン等の金属箔;酸化珪素、アルミナ等の無機化合物を蒸着したフィルム等が挙げられる。これらの中でも、好ましくは金属箔、更に好ましくはアルミニウム箔が挙げられる。電池用包装材料の製造時にしわやピンホールを防止するために、本発明においてバリア層3として、軟質アルミニウム箔、例えば、焼きなまし処理済みのアルミニウム(JIS A8021P-O)又は(JIS A8079P-O)箔等を用いることが好ましい。
本発明の電池用包装材料において、第2接着層5は、バリア層3とシーラント層4を強固に接着させるために、これらの間に必要に応じて設けられる層である。
本発明の電池用包装材料において、シーラント層4は、最内層に該当し、電池の組み立て時にシーラント層同士が熱溶着して電池素子を密封する層である。
本発明の電池用包装材料において、絶縁層6は、絶縁性を高めるために、基材層1の外側(上記の接着層2とは反対側)に必要に応じて設けられる層である。
本発明の電池用包装材料において、第3接着層7は、基材層1と絶縁層6との接着性を高めるために、これらの間に必要に応じて設けられる層である。
本発明の電池用包装材料において、コーティング層8は、耐薬品性、スリップ性、耐傷性等の機能性を付与する目的で、基材層1の外側(上記の接着層2とは反対側)又は絶縁層6を設ける場合には当該絶縁層6の外側(基材層1とは反対側)に、必要に応じて設けられる層である。
上記のとおり、本発明の電池用包装材料において、少なくとも1つの層が吸光発熱物質を含有していてもよい(態様C)。このように吸光発熱物質を含有させることにより、接着層2の形成に使用される上記樹脂組成物を加熱してクイックキュアさせる際に光照射を行うと、当該樹脂組成物の全体に安定で均一な熱量を供給でき、硬化状態にバラツキが生じるのを抑制し、優れた密着強度を備える接着層2の形成が可能になる。
本発明の電池用包装材料の製造方法については、所定の組成の各層を積層させた積層体が得られる限り、特に制限されないが、例えば、以下の方法が例示される。
まず、接着層2の形成に使用される樹脂組成物を介して基材層とバリア層を貼り合わせた状態で当該樹脂組成物を加熱して硬化させることにより、基材層1、接着層2、バリア層3が順に積層された積層体(以下、「積層体A」と表記することもある)を形成する。積層体Aの形成は、具体的には、基材層1上又は必要に応じて表面が化成処理されたバリア層3に接着層2の形成に使用される樹脂組成物を、グラビアコート法、ロールコート法等の塗布方法で塗布・乾燥した後に、当該バリア層3又は基材層1を積層させて接着層2を硬化させるドライラミネーション法によって行うことができる。接着層2の硬化条件としては、例えば、150~200℃、好ましくは160~190℃で、1~60秒間、好ましくは1~30秒間が挙げられる。本発明では、接着層2の硬化に高温条件でのエージングを要せず、前記硬化条件のみで接着層2を十分に硬化させることができるので、従来技術に比して大幅にリードタイムを短縮することができる。
吸光発熱物質を用いる場合についても、所定の組成の各層を積層させた積層体が得られる限り、特に制限されないが、例えば、少なくとも、基材層1、接着層2、バリア層3、及びシーラント層4をこの順に積層させる積層工程を含み、当該積層工程中に、下記第1工程及び第2工程を含む方法が挙げられる。
第1工程:少なくとも、基材層1、未硬化接着層2'、及びバリア層3をこの順に有する積層体であって、前記未硬化接着層2'が、熱硬化性樹脂と、硬化促進剤とを含有する樹脂組成物であり、且つ前記積層体に含まれる少なくとも1つの層が吸光発熱物質を含有する積層体を形成する。
第2工程:前記第1工程で得られた積層体に対して、前記吸光発熱物質が発熱可能な波長の光を照射しつつ加熱して、前記未硬化接着層2'に含まれる熱硬化性樹脂を硬化させることにより、前記未硬化接着層2'を接着層2に変換する。
以下、工程毎に、吸光発熱物質を用いる場合の本発明の電池用包装材料の製造方法について説明する。
第1工程では、基材層1、未硬化接着層2'、及びバリア層3をこの順に有する積層体であって、前記未硬化接着層2'が、熱硬化性樹脂と、硬化促進剤とを含有する樹脂組成物であり、且つ前記積層体に含まれる少なくとも1つの層が吸光発熱物質を含有する積層体(以下、「積層体A」と表記することもある)を形成する。ここで、未硬化接着層2'は、接着層2が硬化していない状態の層であり、硬化性樹脂と、硬化促進剤とを含有する樹脂組成物で形成される。
第2工程では、前記第1工程で得られた積層体に対して、前記吸光発熱物質が発熱可能な波長の光を照射しつつ加熱して、前記未硬化接着層2'に含まれる熱硬化性樹脂を硬化させることにより、前記未硬化接着層2'を接着層2に変換する。
本発明の電池用包装材料は、正極、負極、電解質等の電池素子を密封して収容するための包装材料として使用される。
[電池用包装材料の製造A]
二軸延伸ナイロンフィルム(厚さ25μm)からなる基材層1の上に、両面に化成処理を施したアルミニウム箔(厚さ40μm)からなるバリア層3をドライラミネーション法により積層させた。具体的には、アルミニウム箔の一方面に、表1A~4Aに示す樹脂組成物を厚さ4μmとなるように塗布し、この上にと基材層1を加圧加熱貼合した後、下記の硬化条件で、当該樹脂組成物を硬化させて、基材層1/接着層2/バリア層3の積層体を調製した。
硬化条件A:80℃で7日間
硬化条件B:160℃で30秒間
硬化条件C:190℃で30秒間
上記で得られた各電池用包装材料について、目視にてシワの発生の有無を確認し、電池用包装材料50枚当たり、シワが発生していた枚数の割合(熱ジワ不良率:%)を算出した。
上記で得られた各電池用包装材料を裁断して15mm×250mmの短冊片を作製し、引張り試験機(島津製作所製、AGS-50D(商品名))を用いて、基材層1とバリア層3の層間を、15mm/分の剥離速度で剥離させて、剥離させるのに要する強度を測定することにより、基材層1とバリア層3の層間の密着強度(剥離強度)を測定し、下記判定基準に従って、密着強度を評価した。
<密着強度の判定基準>
○:密着強度が6.0N/15mm以上である。
△:密着強度が3.0N/15mm以上、6.0N/15mm未満である。
×:密着強度が3.0N/15mm未満である。
上記で得られた各電池用包装材料を裁断して120×80mmの短冊片を作製し、これを試験サンプルとした。30×50mmの矩形状の雄型とこの雄型とのクリアランスが0.5mmの雌型からなるストレート金型を用い、雄型側に熱接着性樹脂層側が位置するように雌型上に上記試験サンプルを載置し、成形深さを6.0mm及び7.0mmに設定して上記試験サンプルを0.1MPaの押え圧(面圧)で押えて、冷間成形(引き込み1段成形)した。成形された各試験サンプルにおけるピンホール及びクラックの発生の有無を確認した。成形深さ6.0mm及び7.0mmの場合について、それぞれ電池用包装材料10枚を用いて冷間成型し、以下の判定基準に従って成形性を評価した。
<成型性の判定基準>
◎:成形深さ6.0mm及び7.0mmのいずれの場合でも、ピンホール及びクラックの発生が1枚も認められなかった。
○:成形深さ6.0mmの場合には、ピンホール及びクラックの発生が1枚も認められなかったが、成形深さ7.0mm場合には、ピンホール及びクラックの発生が1枚以上認められた。
×:成形深さ6.0mm及び7.0mmのいずれの場合でも、ピンホール及びクラックの発生が1枚以上認められた。
得られた結果を表5A~8Aに示す。この結果から、基材層とバリア層を接着させる接着層の形成に、熱硬化性樹脂と、硬化促進剤と、エラストマー樹脂とを含有する樹脂組成物を使用することによって、短時間で硬化可能で、熱によるシワの発生を抑制でき、しかも、基材層とバリア層との間で高い密着強度、優れ成形性が認められた(実施例1A~33A)。一方、接着層を熱硬化性樹脂のみで形成した場合には、硬化時間を長く設定すると、密着性、成形性が良好であったが、熱によるシワの発生が認められ、また加熱温度を高くして短時間で硬化させると、熱によるシワの発生を抑制できたが、密着性、成形性が不十分であった(比較例1A)。また、接着層の形成において、硬化促進剤とエラストマー樹脂の一方を欠く場合には、密着性及び成形性の双方を満足させることはできなかった(比較例2A~14A)。
なお、上記実施例及び比較例において、使用した熱硬化性樹脂の主剤や硬化剤、硬化促進剤は、同じ作用を持つ他の化合物に置換しても、同様の結果が得られることが確認できている。
[電池用包装材料の製造1B]
二軸延伸ナイロンフィルム(厚さ25μm)からなる基材層の上に、両面に化成処理を施したアルミニウム箔(厚さ40μm)からなるバリア層3をドライラミネーション法により積層させた。具体的には、アルミニウム箔の一方面に、下記組成の樹脂組成物Aを硬化後の厚さが4μmとなるように塗布し、この上に基材層を加圧加熱貼合した後、80℃、7日間の条件で当該樹脂組成物を硬化させて、基材層/接着層/バリア層の積層体を調製した。なお、バリア層3として使用したアルミニウム箔の化成処理は、フェノール樹脂、フッ化クロム化合物、及びリン酸からなる処理液をクロムの塗布量が10mg/m2(乾燥重量)となるように、ロールコート法によりアルミニウム箔の両面に塗布し、皮膜温度が180℃以上となる条件で20秒間焼付けすることにより行った。
・熱硬化性樹脂 100質量部
(主剤:ウレタンポリオール、硬化剤:ジフェニルメタンジイソシアネート)
・樹脂ビーズ 表1B~4Bに示す所定量
(表1B~4Bに示す樹脂ビーズ)
接着層の形成において、下記組成の樹脂組成物Bを使用し、その硬化条件を160℃、30秒間に変更したこと以外は、前記[電池用包装材料の製造1B]と同様の方法で電池用包装材料を製造した。
・熱硬化性樹脂 100質量部
(主剤:ウレタンポリオール、硬化剤:ジフェニルメタンジイソシアネート)
・硬化促進剤 1質量部
(80~150℃で熱硬化性樹脂の架橋反応を促進するイミダゾール化合物)
・樹脂ビーズ 表1B~4Bに示す所定量
(表1B~4Bに示す樹脂ビーズ)
また、接着層の形成において、下記組成の樹脂組成物Cを使用し、その硬化条件を160℃、30秒間に変更したこと以外は、前記[電池用包装材料の製造1B]と同様の方法で電池用包装材料を製造した。
<接着層の形成に使用した樹脂組成物C>
・熱硬化性樹脂 100質量部
(主剤:ウレタンポリオール、硬化剤:ジフェニルメタンジイソシアネート)
・硬化促進剤 1質量部
(1,8-ジアザビシクロ[5.4.0]ウンデセ-7エンのオクチル酸塩)
・樹脂ビーズ 表1B~4Bに示す所定量
(表1B~4Bに示す樹脂ビーズ)
上記で得られた各電池用包装材料を裁断して、120×80mmの短冊片を作製し、これを試験サンプルとした。30×50mmの矩形状の雄型とこの雄型とのクリアランスが0.5mmの雌型からなるストレート金型を用い、雄型側に熱接着性樹脂層側が位置するように雌型上に上記試験サンプルを載置し、成形深さを種々の範囲に設定して上記試験サンプルを0.1MPaの押え圧(面圧)で押えて、冷間成形(引き込み1段成形)した。成形された各試験サンプルにおける金属層のピンホール及びクラックの発生の有無を確認し、ピンホール及びクラックの発生率(%)を算出した。ピンホール及びクラックの発生率は、上記成形を行った後に1カ所でもピンホール又はクラックが認められるものを成形不良品として判別し、100個の試験サンプルを上記条件で成形した際に発生した成形不良品の割合を求め、成形不良品の割合が5%未満である場合を合格、成形不良品の割合が5%以上である場合を不合格として判定した。また、接着層を形成する樹脂組成物に樹脂ビーズを添加しないこと以外は、前記と同様に製造した電池用包装材料をコントロールとして、同様に成形性の評価を行った。得られた結果を下記基準に従って判定し、成形性向上効果を評価した。
◎:コントロールに比べて合格になる成形深さが1.0mm以上向上している。
○:コントロールに比べて合格になる成形深さが0.5mm以上1.0mm未満向上している。
△:合格になる成形深さがコントロールと同じである。
×:コントロールに比べて合格になる成形深さが低下している。
得られた結果を表1B~4Bに示す。表1B~4Bから明らかなように、反応性を有していない樹脂ビーズを接着層に添加した場合は、樹脂ビーズを添加していない場合に比して成形性が低下していた(比較例1B~4B)。これに対して、反応性樹脂ビーズを接着層に添加すると、樹脂ビーズを添加していない場合に比して成形深さを大きくすることができ、成形性が向上することが分かった。また、接着層を形成する樹脂組成物に硬化促進剤を添加することにより、160℃、30秒間という極めて短時間で、当該接着層を硬化させることができ、リードタイムの大幅な短縮が図れていた(樹脂組成物B及びCの場合)。
[電池用包装材料の製造]
二軸延伸ナイロンフィルム(厚さ25μm)からなる基材層1の上に、両面に化成処理を施したアルミニウム箔(厚さ40μm)からなるバリア層3をドライラミネーション法により積層させた。具体的には、アルミニウム箔の一方面に、表1C~4Cに示す樹脂組成物を塗布し、バリア層3上に未硬化接着層2'(厚さ4μm)を形成した。次いで、バリア層3上の接着層2と基材層1を加圧加熱貼合した後、下記の硬化条件で、未硬化接着層2'中の熱硬化性樹脂を硬化させて、基材層1/接着層2/バリア層3の積層体を調製した。
硬化条件A:光照射せず、到達温度60℃で7日間
硬化条件B:基材層1側からハロゲンランプを光源として照射出力7.2W・cm-2にて光照射を行いつつ、到達温度190℃で1秒間
硬化条件C:基材層1側からハロゲンランプを光源として照射出力4.0W・cm-2にて光照射を行いつつ、到達温度140℃で1秒間
上記で得られた各電池用包装材料について、目視にてシワの発生の有無を確認し、電池用包装材料50枚当たり、シワが発生していた枚数の割合(熱ジワ不良率:%)を算出した。
上記で得られた各電池用包装材料を裁断して15mm幅に切断し、基材層1とバリア層3の層間を、50mm/分の剥離速度で剥離するのに要する力の最大値を測定することにより、基材層1とバリア層3の層間の密着強度(剥離強度)を測定した。密着強度が6.0N/15mm以上である場合は○、6.0N/15mmである場合は×として判定した。
得られた結果を表5C~8Cに示す。この結果から、基材層とバリア層を接着させる接着層を、熱硬化性樹脂と、硬化促進剤と、吸光発熱物質とを含有する樹脂組成物を用いて光照射条件下で硬化させた場合には、均一な硬化状態を短時間で形成できているため、熱によるシワの発生を抑制でき、しかも基材層とバリア層との間で高い密着強度が認められた(実施例1C~35C)。一方、接着層を熱硬化性樹脂のみで形成した場合には、基材層とバリア層の高い密着性が認められたが、硬化するのに長時間のエージングを要し、熱によるシワの発生が認められた(比較例1C)。また、接着層を、熱硬化性樹脂と吸光発熱物質とを含有する樹脂組成物を用いて光照射条件下で硬化させた場合には、基材層とバリア層の高い密着強度が劣っており、クイックキュアで満足できる密着強度を得ることができなかった(比較例2C~15C)。
なお、上記実施例及び比較例において、使用した熱硬化性樹脂の主剤や硬化剤、硬化促進剤は、同じ作用を持つ他の化合物に置換しても、同様の結果が得られることが確認できている。
2 接着層
3 バリア層
4 シーラント層
Claims (14)
- 少なくとも、基材層、接着層、バリア層、及びシーラント層をこの順に有する積層体からなり、
前記接着層が、熱硬化性樹脂と、(A)硬化促進剤及びエラストマー樹脂、または(B)反応性樹脂ビーズとを含有する樹脂組成物の硬化物であることを特徴とする、電池用包装材料。 - 前記接着層が、(B)反応性樹脂ビーズ及び硬化促進剤を含有する樹脂組成物の硬化物である、請求項1に記載の電池用包装材料。
- 前記反応性樹脂ビーズが、官能基を有するウレタン樹脂ビーズ又はアクリル樹脂ビーズである、請求項1又は2に記載の電池用包装材料。
- 前記反応性樹脂ビーズの屈折率が1.3~1.8である、請求項1~3のいずれかに記載の電池用包装材料。
- 前記積層体に含まれる少なくとも1つの層が、吸光発熱物質を含有する、請求項1~4のいずれかに記載の電池用包装材料。
- 前記接着層が、吸光発熱物質を含有する、請求項1~5のいずれかに記載の電池用包装材料。
- 前記吸光発熱物質が、金属粉末、無機顔料、カーボン、及び有機色素よりなる群から選択される少なくとも1種である、請求項6に記載の電池用包装材料。
- 前記接着層とは反対側の基材層上に、基材層側から、第3接着層、絶縁層、及びコーティング層をこの順に有し、
前記コーティング層、絶縁層、第3接着層、基材層、接着層、及びシーラント層よりなる群から選択される少なくとも1つの層が、吸光発熱物質を含有する、請求項6又は7に記載の電池用包装材料。 - 前記熱硬化性樹脂が、エポキシ樹脂、アミノ樹脂、アクリル樹脂、ウレタン樹脂、フェノール樹脂、不飽和ポリエステル樹脂、及びアルキド樹脂よりなる群から選択される少なくとも1種である、請求項1~8のいずれかに記載の電池用包装材料。
- 前記硬化促進剤が、アミジン化合物、カルボジイミド化合物、ケチミン化合物、ヒドラジン化合物、スルホニウム塩、ベンゾチアゾリウム塩、及び第3級アミン化合物よりなる群から選択される少なくとも1種である、請求項1~9のいずれかに記載の電池用包装材料。
- 前記バリア層が金属箔である、請求項1~10のいずれかに記載の電池用包装材料。
- 下記工程を含む、電池用包装材料の製造方法。
熱硬化性樹脂と、(A)硬化促進剤及びエラストマー樹脂、または(B)反応性樹脂ビーズとを含有する樹脂組成物を介して基材層とバリア層を貼り合わせた状態で加熱することにより、当該樹脂組成物を硬化させて、基材層、接着層、及びバリア層をこの順に有する積層体を得る工程、並びに
前記工程で得られた積層体のバリア層上に、シーラント層を積層させる工程。 - 少なくとも、基材層、接着層、バリア層、及びシーラント層をこの順に積層させる積層工程を含み、当該積層工程中に、下記第1工程及び第2工程を含む、電池用包装材料の製造方法:
少なくとも、基材層、未硬化接着層、及びバリア層をこの順に有する積層体であって、前記未硬化接着層が、(A)硬化促進剤及びエラストマー樹脂、または(B)反応性樹脂ビーズとを含有する樹脂組成物であり、且つ前記積層体に含まれる少なくとも1つの層が吸光発熱物質を含有する積層体を形成する第1工程、並びに
前記第1工程で得られた積層体に対して、前記吸光発熱物質が発熱可能な波長の光を照射しつつ加熱して、前記未硬化接着層に含まれる熱硬化性樹脂を硬化させることにより、前記未硬化接着層を接着層に変換する第2工程。 - 少なくとも正極、負極、及び電解質を備えた電池素子が、請求項1~11のいずれかに記載の電池用包装材料内に収容されている、電池。
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EP14773090.7A EP2996170B1 (en) | 2013-03-25 | 2014-03-19 | Packaging material for batteries |
CN201480017476.4A CN105122496B (zh) | 2013-03-25 | 2014-03-19 | 电池用包装材料 |
US14/779,610 US9570718B2 (en) | 2013-03-25 | 2014-03-19 | Packaging material for batteries |
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JP2013195689A JP5682688B1 (ja) | 2013-09-20 | 2013-09-20 | 電池用包装材料 |
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EP2996170A1 (en) | 2016-03-16 |
KR102220457B1 (ko) | 2021-02-25 |
CN105122496A (zh) | 2015-12-02 |
EP2996170A4 (en) | 2016-11-30 |
US20160049622A1 (en) | 2016-02-18 |
EP2996170B1 (en) | 2019-05-08 |
KR20150133700A (ko) | 2015-11-30 |
CN105122496B (zh) | 2018-01-19 |
US9570718B2 (en) | 2017-02-14 |
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