TWI658630B - Packaging materials, battery outer cases and batteries - Google Patents
Packaging materials, battery outer cases and batteries Download PDFInfo
- Publication number
- TWI658630B TWI658630B TW104104436A TW104104436A TWI658630B TW I658630 B TWI658630 B TW I658630B TW 104104436 A TW104104436 A TW 104104436A TW 104104436 A TW104104436 A TW 104104436A TW I658630 B TWI658630 B TW I658630B
- Authority
- TW
- Taiwan
- Prior art keywords
- resin
- layer
- packaging material
- battery
- melting point
- Prior art date
Links
- 239000005022 packaging material Substances 0.000 title claims abstract description 120
- 229920005989 resin Polymers 0.000 claims abstract description 206
- 239000011347 resin Substances 0.000 claims abstract description 206
- 239000011342 resin composition Substances 0.000 claims abstract description 80
- 238000002844 melting Methods 0.000 claims abstract description 74
- 230000008018 melting Effects 0.000 claims abstract description 69
- 239000011888 foil Substances 0.000 claims abstract description 54
- 229910052751 metal Inorganic materials 0.000 claims abstract description 44
- 239000002184 metal Substances 0.000 claims abstract description 44
- 229920005992 thermoplastic resin Polymers 0.000 claims abstract description 35
- 229920005672 polyolefin resin Polymers 0.000 claims abstract description 32
- 229920006015 heat resistant resin Polymers 0.000 claims abstract description 16
- 230000000630 rising effect Effects 0.000 claims abstract description 7
- 239000010410 layer Substances 0.000 claims description 242
- 239000012790 adhesive layer Substances 0.000 claims description 39
- -1 polypropylene Polymers 0.000 claims description 21
- 239000004743 Polypropylene Substances 0.000 claims description 13
- 229920001155 polypropylene Polymers 0.000 claims description 13
- 238000002156 mixing Methods 0.000 claims description 12
- 238000000465 moulding Methods 0.000 claims description 12
- 229920005674 ethylene-propylene random copolymer Polymers 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 7
- 230000002093 peripheral effect Effects 0.000 claims description 7
- 239000004925 Acrylic resin Substances 0.000 claims description 6
- 229920000178 Acrylic resin Polymers 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims description 6
- 238000009820 dry lamination Methods 0.000 claims description 4
- 229920000642 polymer Polymers 0.000 claims description 2
- 238000007789 sealing Methods 0.000 abstract description 20
- 239000000088 plastic resin Substances 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 61
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 57
- 239000000377 silicon dioxide Substances 0.000 description 28
- 235000012239 silicon dioxide Nutrition 0.000 description 26
- UAUDZVJPLUQNMU-UHFFFAOYSA-N Erucasaeureamid Natural products CCCCCCCCC=CCCCCCCCCCCCC(N)=O UAUDZVJPLUQNMU-UHFFFAOYSA-N 0.000 description 19
- UAUDZVJPLUQNMU-KTKRTIGZSA-N erucamide Chemical compound CCCCCCCC\C=C/CCCCCCCCCCCC(N)=O UAUDZVJPLUQNMU-KTKRTIGZSA-N 0.000 description 19
- 229910052782 aluminium Inorganic materials 0.000 description 16
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 16
- 239000000463 material Substances 0.000 description 14
- 238000006243 chemical reaction Methods 0.000 description 11
- 239000000203 mixture Substances 0.000 description 11
- 238000003860 storage Methods 0.000 description 11
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 10
- 239000000853 adhesive Substances 0.000 description 10
- 230000001070 adhesive effect Effects 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 10
- 239000000126 substance Substances 0.000 description 10
- SYWDPPFYAMFYQQ-KTKRTIGZSA-N (z)-docos-13-en-1-amine Chemical compound CCCCCCCC\C=C/CCCCCCCCCCCCN SYWDPPFYAMFYQQ-KTKRTIGZSA-N 0.000 description 8
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 7
- 238000005553 drilling Methods 0.000 description 7
- 239000007788 liquid Substances 0.000 description 7
- 229910001416 lithium ion Inorganic materials 0.000 description 7
- 150000001875 compounds Chemical class 0.000 description 6
- 238000007580 dry-mixing Methods 0.000 description 6
- 239000003792 electrolyte Substances 0.000 description 6
- 229920006284 nylon film Polymers 0.000 description 6
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 5
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 5
- 229910052804 chromium Inorganic materials 0.000 description 5
- 239000011651 chromium Substances 0.000 description 5
- 238000004891 communication Methods 0.000 description 5
- 238000001035 drying Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- VXNZUUAINFGPBY-UHFFFAOYSA-N 1-Butene Chemical compound CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 238000007334 copolymerization reaction Methods 0.000 description 4
- 229920013716 polyethylene resin Polymers 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- 239000002356 single layer Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- UGJWEDNGBKKYSX-KSSFIOAISA-N CO[C@H]1CC=C2CCN3CCc4cc5OCOc5cc4[C@]23C1 Chemical compound CO[C@H]1CC=C2CCN3CCc4cc5OCOc5cc4[C@]23C1 UGJWEDNGBKKYSX-KSSFIOAISA-N 0.000 description 3
- 239000004952 Polyamide Substances 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 3
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 description 3
- BFGKITSFLPAWGI-UHFFFAOYSA-N chromium(3+) Chemical class [Cr+3] BFGKITSFLPAWGI-UHFFFAOYSA-N 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000006378 damage Effects 0.000 description 3
- UGJWEDNGBKKYSX-UHFFFAOYSA-N erythramine Natural products C1CN2CCC3=CC=4OCOC=4C=C3C32C1=CCC(OC)C3 UGJWEDNGBKKYSX-UHFFFAOYSA-N 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- AWJWCTOOIBYHON-UHFFFAOYSA-N furo[3,4-b]pyrazine-5,7-dione Chemical compound C1=CN=C2C(=O)OC(=O)C2=N1 AWJWCTOOIBYHON-UHFFFAOYSA-N 0.000 description 3
- 229920002647 polyamide Polymers 0.000 description 3
- 229920000728 polyester Polymers 0.000 description 3
- 229920006267 polyester film Polymers 0.000 description 3
- 229920000139 polyethylene terephthalate Polymers 0.000 description 3
- 239000005020 polyethylene terephthalate Substances 0.000 description 3
- 229920005749 polyurethane resin Polymers 0.000 description 3
- LIKMAJRDDDTEIG-UHFFFAOYSA-N 1-hexene Chemical compound CCCCC=C LIKMAJRDDDTEIG-UHFFFAOYSA-N 0.000 description 2
- 229920001661 Chitosan Chemical class 0.000 description 2
- 229920000089 Cyclic olefin copolymer Polymers 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 2
- 239000005977 Ethylene Substances 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical class [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 2
- 239000005057 Hexamethylene diisocyanate Substances 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 2
- 229920002125 Sokalan® Polymers 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 150000001336 alkenes Chemical class 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 239000008151 electrolyte solution Substances 0.000 description 2
- 150000004673 fluoride salts Chemical class 0.000 description 2
- 239000012793 heat-sealing layer Substances 0.000 description 2
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052755 nonmetal Chemical class 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 239000004584 polyacrylic acid Substances 0.000 description 2
- 229920001707 polybutylene terephthalate Polymers 0.000 description 2
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 2
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 2
- 229920001384 propylene homopolymer Polymers 0.000 description 2
- 239000005995 Aluminium silicate Substances 0.000 description 1
- 229920002799 BoPET Polymers 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229920002292 Nylon 6 Polymers 0.000 description 1
- 229920002302 Nylon 6,6 Polymers 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 239000002981 blocking agent Substances 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000012986 chain transfer agent Substances 0.000 description 1
- 229920006026 co-polymeric resin Polymers 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 238000004925 denaturation Methods 0.000 description 1
- 230000036425 denaturation Effects 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 238000001938 differential scanning calorimetry curve Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 229920000092 linear low density polyethylene Polymers 0.000 description 1
- 239000004707 linear low-density polyethylene Substances 0.000 description 1
- 150000002632 lipids Chemical class 0.000 description 1
- 229920001684 low density polyethylene Polymers 0.000 description 1
- 239000004702 low-density polyethylene Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 229920001179 medium density polyethylene Polymers 0.000 description 1
- 239000004701 medium-density polyethylene Substances 0.000 description 1
- 239000002905 metal composite material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000011112 polyethylene naphthalate Substances 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 235000012222 talc Nutrition 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
- 150000003755 zirconium compounds Chemical class 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/124—Primary casings; Jackets or wrappings characterised by the material having a layered structure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/116—Primary casings; Jackets or wrappings characterised by the material
- H01M50/124—Primary casings; Jackets or wrappings characterised by the material having a layered structure
- H01M50/126—Primary casings; Jackets or wrappings characterised by the material having a layered structure comprising three or more layers
- H01M50/129—Primary casings; Jackets or wrappings characterised by the material having a layered structure comprising three or more layers with two or more layers of only organic material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
- B32B15/085—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising polyolefins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion 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
- H01M50/131—Primary casings; Jackets or wrappings characterised by physical properties, e.g. gas permeability, size or heat resistance
-
- 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
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/342—Non-re-sealable arrangements
- H01M50/3425—Non-re-sealable arrangements in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member
-
- 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
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/375—Vent means sensitive to or responsive to temperature
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2439/00—Containers; Receptacles
- B32B2439/40—Closed containers
- B32B2439/46—Bags
-
- 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
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Gas Exhaust Devices For Batteries (AREA)
- Laminated Bodies (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
本發明之包裝材1,其特徵為其係包含:作為外側層之耐熱性樹脂層2、作為內側層之熱可塑性樹脂層3、及配設於此等兩層間之金屬箔層4;前述熱可塑性樹脂層3,係至少含有以樹脂組成物形成之混合樹脂層,且該樹脂組成物係含有:由低熔點且高流動之聚烯烴樹脂所成之第1樹脂、及由高熔點且低流動之聚烯烴樹脂所成之第2樹脂。本發明之包裝材,生產性良好,可抑制成本,且確保充分的密封性,並同時防止包裝材所構成之電池外殼等因內壓與溫度過度上升時,氣體無法洩漏而內壓上升所導致的包裝材破裂情形。 The packaging material 1 of the present invention is characterized in that it includes a heat-resistant resin layer 2 as an outer layer, a thermoplastic resin layer 3 as an inner layer, and a metal foil layer 4 disposed between the two layers; The plastic resin layer 3 includes at least a mixed resin layer formed of a resin composition, and the resin composition includes a first resin made of a polyolefin resin having a low melting point and a high flow, and a resin having a high melting point and a low flow. The second resin made of polyolefin resin. The packaging material of the present invention has good productivity, can reduce costs, and ensure sufficient sealing, and at the same time prevents the internal pressure and temperature of the battery case and the like formed by the packaging material from rising excessively, resulting in an increase in internal pressure caused by the inability to leak gas. Cracked packaging material.
Description
本發明是關於可較佳地作為鋰離子蓄電池等電池用的外裝材而使用的包裝材。 The present invention relates to a packaging material that can be suitably used as an exterior material for a battery such as a lithium ion battery.
又,本說明書中,「MFR」是指以JIS K7210-1999為基準,於溫度230℃、負荷2.16kg的條件下所測定的MFR(熔體流動速率)。 In this specification, "MFR" refers to MFR (melt flow rate) measured under conditions of a temperature of 230 ° C and a load of 2.16 kg based on JIS K7210-1999.
此外,本說明書中,「熔點」是指根據JIS K7121-1987「塑膠的轉化溫度測定方法」所規定的方法,使用差示掃描熱量計以升溫速度10℃/分所測定的熔融峰溫度(熔點)。 In addition, in this specification, "melting point" means the melting peak temperature (melting point) measured using a differential scanning calorimeter at a heating rate of 10 ° C / min in accordance with the method specified in JIS K7121-1987 "Method for Measuring the Conversion Temperature of Plastics". ).
此外,本發明書中,「鋁」之意義,係包含鋁及其合金。「金屬」之意義,係包含金屬單體及其合金。 In the present invention, the meaning of "aluminum" includes aluminum and its alloys. The meaning of "metal" includes metal monomers and their alloys.
鋰離子蓄電池,被廣泛使用作為例如筆記型電腦、錄影機、手機、電動車等之電源。此鋰離子蓄電池,是將電池本體部(含有正極、負極及電解質的本體部)的周圍以外殼包圍構成者加以使用。外殼用材料(外裝材),例如,習知是由耐熱性樹脂薄膜所成外層、鋁箔層、熱可塑性樹脂薄膜所成內層,依此順序接著一體化而構成者為習知。 Lithium-ion batteries are widely used as power sources for, for example, notebook computers, video cameras, mobile phones, and electric vehicles. This lithium ion secondary battery is used by surrounding a battery body (a body including a positive electrode, a negative electrode, and an electrolyte) with a casing. It is known that the material for the casing (outer material) is, for example, an outer layer made of a heat-resistant resin film, an aluminum foil layer, and an inner layer made of a thermoplastic resin film.
然而,鋰離子蓄電池等,在過充電或過升溫時電池本體部中容易產生氣體,因此會有氣體漸漸積蓄於外裝材包覆的內部空間內,而使外裝材內部的內壓上升的情形。此內壓上升過大將使外裝材破裂而有內部收容物飛散的憂慮,因此防止此種外裝材破裂的技術已被提出。 However, lithium-ion batteries and the like tend to generate gas in the battery body during overcharging or overheating. Therefore, gas is gradually accumulated in the inner space covered by the exterior material, and the internal pressure inside the exterior material rises. situation. This excessive increase in internal pressure will cause the exterior material to rupture and there is a concern that the internal contents will be scattered. Therefore, a technique for preventing such an exterior material from being cracked has been proposed.
例如,專利文獻1記載了一種附有防爆機能的蓄電裝置,其係具有成形為片狀的正極與負極隔著分離器而積層的電極積層體,將前述電極積層體與電解液一同收容入金屬層壓(laminate)膜製的容器內後,沿著前述容器的外周緣將前述金屬複合膜進行帶狀熱融著,藉由熱密封部使前述容器成為密封封閉並附有防爆機能的蓄電裝置,其具備有鑽井裝置,該鑽井裝置具有:使前述容器的外周緣部位以包夾狀態加以連接固定的刃支持體,及被前述刃支持體支持且在前述容器中同時被配置於較前述熱密封部更中心部側的位置的刃元件;前述刃支持體在產生氣體時,將由膨脹變形的前述容器被押出而移動至前述容器的外周方向,而前述刃元件則會與前述刃支持體一起移動而形成切開前述容器,並成為附有防爆機能的蓄電裝置。 For example, Patent Document 1 describes an electric storage device with an explosion-proof function, which is an electrode laminate having a positive electrode and a negative electrode formed in a sheet shape laminated with a separator interposed therebetween, and the electrode laminate is accommodated in a metal together with an electrolytic solution. After laminating the inside of the container made of film, the metal composite film is heat-sealed along the outer periphery of the container, and the container is sealed and sealed with a heat-sealing portion, and the explosion-proof power storage device is attached to the container. , Which is provided with a drilling device comprising: a blade support for connecting and fixing the outer peripheral portion of the container in a sandwiched state; and a blade support supported by the blade support and disposed in the container at The blade element at a position closer to the center of the sealing portion; when the blade support body generates gas, the container deformed by expansion and expansion is moved to the outer peripheral direction of the container, and the blade element together with the blade support body The container is moved to cut the container, and becomes a power storage device with an explosion-proof function.
此外,專利文獻2記載了一種蓄電元件,其具有浸泡於電解液中的蓄電元件本體、密封上述蓄電元件本體的外裝體、及設置於上述外裝體內側的第1氣體放出機構部、及設置於上述外裝體外側的第2氣體放出機構部,藉由使氣體由存在有上述蓄電元件本體的上述外裝體的內部空間,順次通過各上述氣體放出機構部,從而讓氣體由上述內部空間放出至外部空間,且各上述氣體放出機構部具備壓力調整裝置,可阻止氣體由上述外部空間進入至上述內部空間,且各上述氣體放出機構部之間,形成有 個別地分隔各上述氣體放出機構部的緩衝空間。 In addition, Patent Document 2 describes a power storage element including a power storage element body immersed in an electrolytic solution, an exterior body that seals the power storage element body, and a first gas release mechanism portion provided inside the exterior body, and The second gas release mechanism section provided outside the exterior body passes the gas from the internal space of the exterior body in which the power storage element body is located, and sequentially passes through each of the gas release mechanism sections, thereby allowing the gas to pass from the interior. The space is released to an external space, and each of the gas release mechanism sections is provided with a pressure adjustment device, which can prevent gas from entering the internal space from the external space, and a space is formed between the gas release mechanism sections. The buffer space of each of the gas release mechanism sections is individually partitioned.
【專利文獻1】日本特開2012-156404號公報 [Patent Document 1] Japanese Patent Application Publication No. 2012-156404
【專利文獻2】日本特開2012-156489號公報 [Patent Document 2] Japanese Patent Laid-Open No. 2012-156489
然而,如專利文獻1,設置具有刃支持體及刃元件的鑽井裝置時,必須進行設置鑽井裝置的新步驟,會有製造步驟複雜、生產性降低的問題。此外,必須設置所謂鑽井裝置的新構成部,將會增加成本。 However, as in Patent Document 1, when a drilling device having a blade support and a blade element is installed, a new step of installing the drilling device must be performed, and there are problems that the manufacturing steps are complicated and productivity is reduced. In addition, a new component of a so-called drilling rig must be provided, which will increase costs.
此外,如專利文獻2,設置使外裝體內部產生的氣體向外裝體外部洩漏的安全閥機構(氣體放出機構部等)時,必須進行設置該安全閥機構的新步驟,會有製造步驟複雜、生產性降低的問題。此外,必須設置所謂安全閥機構的新構成部,將會相應地增加成本。 In addition, as in Patent Document 2, when a safety valve mechanism (gas release mechanism section, etc.) is provided for leaking the gas generated inside the exterior body to the outside of the exterior body, a new step of installing the safety valve mechanism is required, and there are manufacturing steps Complex, less productive issues. In addition, a new component of a so-called safety valve mechanism must be provided, which will increase the cost accordingly.
本發明,鑒於如此的技術背景,目的在於提供一種包裝材,其生產性良好,可抑制成本,確保充足的密封性,並同時可防止由此包裝材構成的電池外殼等在內壓及溫度過度上升時,而內部氣體無法洩漏,因內壓上升所導致的包裝材破裂;且本發明並提供一種電池,其可防止電池外殼在內壓及溫度過度上升時,而內部氣體無法洩漏,因內壓上升導致的電池外殼破裂。 In view of such a technical background, an object of the present invention is to provide a packaging material that has good productivity, can reduce costs, ensure sufficient sealing, and can prevent excessive pressure and temperature of a battery case or the like formed from the packaging material. When it rises, the internal gas cannot leak, and the packaging material is broken due to the increase in internal pressure; and the present invention also provides a battery, which can prevent the battery case from leaking when the internal pressure and temperature rise excessively, due to internal pressure The battery case ruptured due to pressure rise.
為達成前述目的,本發明提供以下手段。 To achieve the foregoing object, the present invention provides the following means.
〔1〕一種包裝材,其特徵為其係包含:金屬箔層、及作為內側層之熱可塑性樹脂層;且在該包裝材中,前述熱可塑性樹脂層,係至少含有以樹脂組成物形成之混合樹脂層,且該樹脂組成物係含有:由低熔點且高流動之聚烯烴樹脂所成之第1樹脂、及由高熔點且低流動之聚烯烴樹脂所成之第2樹脂。 [1] A packaging material comprising a metal foil layer and a thermoplastic resin layer as an inner layer; and in the packaging material, the thermoplastic resin layer contains at least a resin composition The resin layer is mixed, and the resin composition contains a first resin made of a polyolefin resin having a low melting point and a high flow, and a second resin made of a polyolefin resin having a high melting point and a low flow.
〔2〕一種包裝材,其特徵為其係包含:作為外側層之耐熱性樹脂、作為內側層之熱可塑性樹脂層、及配設於此兩層間之金屬箔層;且在該包裝材中,前述熱可塑性樹脂層,係至少含有以樹脂組成物形成之混合樹脂層,且該樹脂組成物係含有:由低熔點且高流動之聚烯烴樹脂所成之第1樹脂、及由高熔點且低流動之聚烯烴樹脂所成之第2樹脂。 [2] A packaging material characterized by comprising: a heat-resistant resin as an outer layer, a thermoplastic resin layer as an inner layer, and a metal foil layer disposed between the two layers; and in the packaging material, The thermoplastic resin layer includes at least a mixed resin layer formed of a resin composition, and the resin composition includes a first resin made of a polyolefin resin having a low melting point and high flow, and a resin having a high melting point and low The second resin made of flowing polyolefin resin.
〔3〕如前項1或2中所述之包裝材,其中,前述熱可塑性樹脂層,係至少含有:前述混合樹脂層、及單一樹脂層,此2層以上之積層構造,前述混合樹脂層配置於最內側之前述混合樹脂層、前述單一樹脂層及配置於前述混合樹脂層及前述金屬箔層間,由之單一聚烯烴樹脂所成單一樹脂層,此2層以上之積層構造。 [3] The packaging material as described in the above item 1 or 2, wherein the thermoplastic resin layer contains at least the mixed resin layer and a single resin layer, a laminated structure of two or more layers, and the mixed resin layer configuration The mixed resin layer, the single resin layer, and the single resin layer arranged between the mixed resin layer and the metal foil layer on the innermost side are made of a single polyolefin resin, and the layered structure of two or more layers.
〔4〕如前項1~3中任一項所述之包裝材,其中,前述第1樹脂之MFR為10g/10min以上;前述第2樹脂之MFR為未達10g/10min。 [4] The packaging material according to any one of the preceding paragraphs 1 to 3, wherein the MFR of the first resin is 10 g / 10 min or more; and the MFR of the second resin is less than 10 g / 10 min.
〔5〕如前項1~4中任一項所述之包裝材,其中,前述第1樹脂之熔點為105℃以上未達140℃,前述第2樹脂之熔點為135℃以上未達180℃之範圍;前述第2樹脂之熔點,係較前述第1樹脂之熔點高3℃以上。 [5] The packaging material according to any one of the preceding paragraphs 1 to 4, wherein the melting point of the first resin is 105 ° C or higher and less than 140 ° C, and the melting point of the second resin is 135 ° C or higher and less than 180 ° C. Range: The melting point of the second resin is 3 ° C or more higher than the melting point of the first resin.
〔6〕如前項1~5中任一項所述之包裝材,其中,前述聚烯烴樹脂,係聚乙烯樹脂或聚丙烯樹脂。 [6] The packaging material according to any one of items 1 to 5, wherein the polyolefin resin is a polyethylene resin or a polypropylene resin.
〔7〕如前項1~5中任一項所述之包裝材,其中,前述聚烯烴樹脂,係丙烯均聚物或乙烯-丙烯共聚物。 [7] The packaging material according to any one of items 1 to 5, wherein the polyolefin resin is a propylene homopolymer or an ethylene-propylene copolymer.
〔8〕一種電池用外裝外殼,其特徵為其係將前項1~7中任一項所述之包裝材進行深引伸成形或鼓脹成形所得。 [8] An outer casing for a battery, which is obtained by deep-drawing or bulging the packaging material according to any one of the preceding paragraphs 1 to 7.
〔9〕一種電池,其特徵為其係具備:前項1~7中任一項所述之包裝材2張、及電池本體部;且前述電池本體部係被配置於前述2張之包裝材間,前述2張之包裝材,其個別之內側層之周緣部藉由密封接合形成電池外殼,並於該電池外殼內部封入前述電池本體部。 [9] A battery, comprising: two sheets of the packaging material described in any one of the preceding paragraphs 1 to 7, and a battery main body portion; and the battery main body portion is disposed between the two sheets of the packaging material. In the aforementioned two sheets of packaging material, the peripheral edges of the individual inner layers are sealed to form a battery case, and the battery body is sealed inside the battery case.
〔10〕如前項9中所述之電池,其中,前述電池外殼之溫度上升至120℃~160℃範圍時,連通前述電池外殼之內部空間之貫通排氣路,會產生於前述內側層,且同時前述金屬箔層與前述內側層間,會產生連通前述貫通排氣路之剝離間隙,前述電池外殼內之氣體,藉由前述貫通排氣路及前述剝離間隙向外部洩漏,可防止內壓上升而使電池外殼破裂。 [10] The battery as described in the above item 9, wherein when the temperature of the battery case rises to a range of 120 ° C to 160 ° C, a through-exhaust path communicating with the internal space of the battery case will be generated in the inner layer, and At the same time, a peeling gap is formed between the metal foil layer and the inner layer to communicate with the through exhaust path. The gas in the battery case leaks to the outside through the through exhaust path and the peeling gap, which can prevent the internal pressure from rising. Crack the battery case.
〔11〕如申前項9或10中所述之電池,其中,前述金屬箔層與前述熱可塑性樹脂層係隔著第2接著劑層而積層一體化,前述第2接著劑層,係藉由乾式層壓法而形成之熔點為60℃~100℃之接著劑層。 [11] The battery according to claim 9 or 10, wherein the metal foil layer and the thermoplastic resin layer are laminated and integrated through a second adhesive layer, and the second adhesive layer is formed by An adhesive layer formed by dry lamination with a melting point of 60 ° C to 100 ° C.
〔12〕如前項9~11中任一項所述之電池,其中,前述2張之包裝材中至少一方,係藉由深引伸成形或鼓脹成形而成形為立體形狀者。 [12] The battery according to any one of the preceding paragraphs 9 to 11, wherein at least one of the two packaging materials is formed into a three-dimensional shape by deep drawing or inflation molding.
〔13〕如前項9中所述之電池,其中,前述電池外殼之溫度上升至120℃~160℃範圍時,前述2張之包裝材之個別的內側層所形成熱封部中,會產生前述電池外殼之內部空間與外部連通之內外連通排氣路,前述電池外殼內之氣體藉由通過前述內外連通排氣路向外部洩漏,可防止內壓上升而使電池外殼破裂。 [13] The battery as described in the above item 9, wherein when the temperature of the battery case rises to a range of 120 ° C to 160 ° C, the heat-seal portion formed by the individual inner layers of the two sheets of packaging material will produce the foregoing The internal space of the battery case communicates with the outside and the inside and outside communicate with the exhaust path. The gas in the battery case leaks to the outside through the inside and outside communicating exhaust path, which can prevent the internal pressure from rising and rupture the battery case.
根據〔1〕及〔2〕的發明(包裝材),因為熱可塑性樹脂層,係含有以樹脂組成物形成之混合樹脂層之構成,且該樹脂組成物係含有:低熔點且高流動之聚烯烴樹脂所成之第1樹脂、高熔點且低流動之聚烯烴樹脂所成之第2樹脂,例如,在電池過升溫時電池本體部中會產生氣體積蓄而使內壓上升,同時使包裝材所構成的電池外殼的溫度過度上升,此時,構成內側層的混合樹脂層中,低熔點且高流動的第1樹脂,因為較高熔點且低流動的第2樹脂會先熔融流動,可適當降低混合樹脂層的強度,藉由內壓破壞混合樹脂層,產生了連通內部的間隙(貫通排氣路、連 通排氣路等),電池外殼內部的氣體即可通過此間隙向外部洩漏,從而可防止由包裝材構成的電池外殼等因內壓上升而導致的包裝材破裂。 According to the inventions (packaging materials) of [1] and [2], the thermoplastic resin layer is composed of a mixed resin layer formed of a resin composition, and the resin composition contains: a low-melting and high-flow polymer For example, the first resin made of olefin resin and the second resin made of high-melting and low-flowing polyolefin resin, for example, when the battery is overheated, gas volume is generated in the battery body and the internal pressure rises. At the same time, the packaging material is increased. The temperature of the formed battery case excessively rises. At this time, in the mixed resin layer constituting the inner layer, the first resin having a low melting point and a high flow may be melted first because the second resin having a higher melting point and a low flow may be melted and flowed appropriately. The strength of the mixed resin layer is reduced, and the internal pressure of the mixed resin layer is destroyed, which creates a gap that communicates with the interior (through the exhaust path, the connection Venting, etc.), the gas inside the battery case can leak to the outside through this gap, which can prevent the battery case and other packaging materials made of the packaging material from breaking due to the increase in internal pressure.
此外,使氣體向外部漏洩,不須另外新增構成部(如習知技術的鑽井裝置或氣體放出機構部),因此可抑制成本,實現更加緊密化的優點。 In addition, since the gas is leaked to the outside, there is no need to newly add a structural unit (such as a well-known drilling device or a gas release mechanism unit), so the cost can be suppressed and the advantage of more compactness can be realized.
根據〔3〕的發明,由於熱可塑性樹脂層(內側層),係至少含有:配置於最內側之前述混合樹脂層、及配置於前述混合樹脂層及前述金屬箔層間之單一(一種類的)聚烯烴樹脂所成之單一樹脂層,此2層以上之積層構造,亦即於混合樹脂層及金屬箔層間配置有由單一的聚烯烴樹脂所成的單一樹脂層,因此可充分確保熱封後的熱可塑性樹脂層(內側層)整體的厚度,從而確保安定的密封性與絕緣性。 According to the invention of [3], since the thermoplastic resin layer (inner layer) includes at least the single mixed resin layer disposed at the innermost side and the single (one type) disposed between the mixed resin layer and the metal foil layer. A single resin layer made of a polyolefin resin, and a laminated structure of two or more layers, that is, a single resin layer made of a single polyolefin resin is arranged between the mixed resin layer and the metal foil layer, so it can fully ensure heat sealing The thickness of the entire thermoplastic resin layer (inner layer) ensures stable sealing and insulation.
根據〔4〕的發明,由於前述第1樹脂之MFR為10g/10min以上;前述第2樹脂之MFR為未達10g/10min,因此,例如,由包裝材構成的電池外殼等的內壓及溫度過度上升時,混合樹脂層因內壓而被完全破壞,使電池外殼內部的氣體容易向外部洩漏,從而可充分防止內壓上升而導致的包裝材破裂。 According to the invention of [4], since the MFR of the first resin is 10 g / 10 min or more; and the MFR of the second resin is less than 10 g / 10 min, for example, the internal pressure and temperature of a battery case made of a packaging material, etc. When the temperature rises excessively, the mixed resin layer is completely destroyed by the internal pressure, and the gas inside the battery case is easily leaked to the outside, so that the packaging material can be prevented from being broken due to the increase in the internal pressure.
根據〔5〕的發明,因第1樹脂之熔點為105℃以上未達140℃;第2樹脂之熔點為135℃以上180℃以下的範圍(當然,第2樹脂之熔點較第1樹脂之熔點高),由包裝材構成的電池外殼等的內壓及溫度過度上升時,混合樹脂層因內壓而被完全破壞,使電池外殼內部的氣體容易向外部洩漏,從而可充分防止內壓上升而導致的包裝材破裂。進一步,因第2樹脂之熔點較第1樹脂之熔點高3℃以上,故由包裝材所構 成的電池外殼等的內壓及溫度過度上升時,混合樹脂層因內壓而更被完全地破壞,使電池外殼內部的氣體容易向外部洩漏,從而可充分防止內壓上升而導致的包裝材破裂。 According to the invention of [5], the melting point of the first resin is 105 ° C to 140 ° C; the melting point of the second resin is in the range of 135 ° C to 180 ° C (of course, the melting point of the second resin is higher than the melting point of the first resin) High), when the internal pressure and temperature of the battery case made of packaging materials rise excessively, the mixed resin layer is completely destroyed by the internal pressure, so that the gas inside the battery case is likely to leak to the outside, which can sufficiently prevent the internal pressure from rising. The resulting packaging material was cracked. Furthermore, since the melting point of the second resin is higher than the melting point of the first resin by 3 ° C or more, it is constituted by the packaging material. When the internal pressure and temperature of the battery case and the like rise excessively, the mixed resin layer is more completely destroyed by the internal pressure, so that the gas inside the battery case is likely to leak to the outside, and the packaging material caused by the increase in internal pressure can be fully prevented. rupture.
根據〔6〕的發明,因前述聚烯烴樹脂,係由聚乙烯樹脂或聚丙烯樹脂所構成,從而低成本即可充分防止內壓上升而導致的包裝材破裂。 According to the invention of [6], since the polyolefin resin is composed of a polyethylene resin or a polypropylene resin, it is possible to sufficiently prevent the packaging material from being broken due to an increase in internal pressure at a low cost.
根據〔7〕的發明,因前述聚烯烴樹脂,係使用丙烯均聚物或乙烯-丙烯共聚物,當達到高溫度時,電池外殼內部的氣體可更順利地向外部洩漏,從而可更充分防止內壓上升而導致的包裝材破裂。 According to the invention of [7], since the aforementioned polyolefin resin is a propylene homopolymer or an ethylene-propylene copolymer, when a high temperature is reached, the gas inside the battery case can be leaked to the outside more smoothly, which can be more fully prevented The packaging material is broken due to an increase in internal pressure.
根據〔8〕的發明(電池用外裝外殼),電池過升溫時電池本體部中會產生氣體積蓄,而使內壓過度上升同時並使電池用外裝外殼(電池外殼)的溫度過度上升,在構成內側層的混合樹脂層中,低熔點且高流動的第1樹脂,較高熔點且低流動的第2樹脂先發生熔融流動,因此混合樹脂層的強度可適當降低,且藉由內壓破壞混合樹脂層,產生連通內部的間隙(貫通排氣路),電池外殼內部的氣體可通過此間隙向外部洩漏,從而可防止因內壓上升而導致的電池外殼破裂的情形。 According to the invention of [8] (battery outer case), when the battery is overheated, a gas volume is generated in the battery main body portion, and the internal pressure is excessively increased, and the temperature of the battery outer case (battery case) is excessively increased. In the mixed resin layer constituting the inner layer, the low-melting and high-flowing first resin and the higher-melting and low-flowing second resin first melt-flow, so the strength of the mixed resin layer can be appropriately reduced, and by the internal pressure When the mixed resin layer is broken, a gap (through the exhaust passage) communicating with the inside is generated, and the gas inside the battery case can leak to the outside through this gap, thereby preventing the battery case from being broken due to an increase in internal pressure.
根據〔9〕〔10〕的發明(電池),相互間地電池本體部所配置的2張上述包裝材,其內側層的周緣部彼此藉由熱封使密封接合而形成電池外殼,於該電池外殼的內部封入前述電池本體部,在電池過升溫時電池本體部中會產生氣體積蓄而使內壓上升,同時並使電池外殼的溫度上升至120℃~160℃範圍時,能夠於前述內側層產生連通電池外殼之內部空間之貫通排氣路,同時於金屬箔層與內側層間,可產生連通前述貫 通排氣路之剝離間隙,電池外殼內之氣體,藉由前述貫通排氣路及剝離間隙向外部洩漏,可防止電池外殼的內壓上升所導致電池外殼破裂之情形。 According to the invention (battery) of [9] and [10], the two sheets of the packaging material arranged on the battery main body portion with each other, and the peripheral edge portions of the inner layer are sealed with each other by heat sealing to form a battery case. When the battery body is sealed inside the case, when the battery overheats, a gas volume will be generated in the battery body and the internal pressure will increase. At the same time, the temperature of the battery case will rise to the range of 120 ° C to 160 ° C. A through-exhaust path that communicates with the internal space of the battery case is generated, and a connection between the metal foil layer and the inner layer is generated. The peeling gap through the exhaust passage, and the gas in the battery case leaks to the outside through the aforementioned exhausting passage and the peeling gap, which can prevent the battery case from being broken due to the increase in the internal pressure of the battery case.
此外,使氣體向外部漏洩,不須另外新增構成部(如習知技術的鑽井裝置或氣體放出機構部),因此可抑制成本,實現電池更加緊密化的優點。 In addition, since the gas is leaked to the outside, there is no need to newly add a structural unit (such as a well-known drilling device or a gas release mechanism unit), so the cost can be suppressed and the advantages of more compact batteries can be realized.
根據〔11〕的發明,內側層與金屬箔層間的第2接著劑層(藉由乾式層壓法而形成之熔點為60℃~100℃之接著劑層)可產生剝離間隙,因此氣體通過此剝離間隙向外部洩漏後,由第2接著劑層而間隔的各接著劑可因熱而快速融著(接著)並封閉剝離間隙,從而可充分防止電池的內容液向外部流出。 According to the invention of [11], the second adhesive layer between the inner layer and the metal foil layer (adhesive layer having a melting point of 60 ° C to 100 ° C formed by the dry lamination method) can generate a peeling gap, so the gas passes through it. After the peeling gap is leaked to the outside, each of the adhesives spaced by the second adhesive layer can be quickly melted (adhered) by the heat to close the peeling gap, thereby sufficiently preventing the contents of the battery from flowing to the outside.
根據〔12〕的發明,2張之包裝材中至少一方,因係藉由深引伸成形或鼓脹成形而成形為立體形狀,在電池過升溫時電池本體部中會產生氣體積蓄而使內壓上升,同時並使電池外殼的溫度上升至120℃~160℃範圍時,前述成形而形成的彎曲狀或扭曲狀部位或其附近位置,可容易產生前述貫通排氣路,從而充分防止電池外殼因內壓上升而使電池外殼破裂的情形。 According to the invention of [12], at least one of the two packaging materials is formed into a three-dimensional shape by deep drawing molding or inflation molding. When the battery is overheated, a gas volume is generated in the battery body portion, and the internal pressure is increased. At the same time, when the temperature of the battery case is raised to a range of 120 ° C to 160 ° C, the curved or twisted portion formed by the foregoing molding or the vicinity thereof can easily generate the aforementioned through-exhaust path, thereby fully preventing the battery casing from being caused by internal conditions. When the pressure rises and the battery case breaks.
根據〔13〕的發明,電池外殼之溫度上升至120℃~160℃範圍時,前述2張之包裝材之個別的內側層所形成的熱封部中,會因混合樹脂層藉由內壓上升而破壞等,產生電池外殼的內部空間與外部連通之內外連通排氣路,前述電池外殼內之氣體藉由通過該內外連通排氣路向外部洩漏,可防止電池外殼的內壓上升導致的電池外殼破裂情形。 According to the invention of [13], when the temperature of the battery case rises to a range of 120 ° C to 160 ° C, the heat-sealed portion formed by the individual inner layers of the two sheets of the packaging material will rise due to the internal pressure of the mixed resin layer. Destruction, etc., results in an internal and external communication exhaust path where the internal space of the battery case communicates with the outside. The gas in the battery case leaks to the outside through the internal and external communication exhaust path, which can prevent the battery case from rising due to the internal pressure of the battery case. Rupture situation.
此外,使氣體向外部漏洩,不須另外新增構成部(如習知技 術的鑽井裝置或氣體放出機構部),因此可抑制成本,實現電池更加緊密化的優點。 In addition, to make the gas leak to the outside, there is no need to add additional components (such as (Such as a drilling device or a gas release mechanism), which can reduce costs and realize the advantage of a more compact battery.
1‧‧‧包裝材 1‧‧‧Packaging material
2‧‧‧外側層(耐熱性樹脂層) 2‧‧‧outer layer (heat-resistant resin layer)
3‧‧‧內側層(熱可塑性樹脂層) 3‧‧‧inner layer (thermoplastic resin layer)
4‧‧‧金屬箔層 4‧‧‧ metal foil layer
5‧‧‧第1接著劑層 5‧‧‧The first adhesive layer
6‧‧‧第2接著劑層 6‧‧‧The second adhesive layer
10‧‧‧電池 10‧‧‧ Battery
11‧‧‧電池外殼 11‧‧‧ Battery case
12‧‧‧內部空間 12‧‧‧ Internal space
13‧‧‧角落部 13‧‧‧ Corner
15‧‧‧電池本體部 15‧‧‧Battery body
21‧‧‧貫通排氣路 21‧‧‧through exhaust
22‧‧‧剝離間隙 22‧‧‧ peeling gap
25‧‧‧內外連通排氣路 25‧‧‧Internal and external communication exhaust
31‧‧‧混合樹脂層(最內層) 31‧‧‧ mixed resin layer (innermost layer)
32‧‧‧單一樹脂層 32‧‧‧Single resin layer
【圖1】表示本發明的包裝材的一實施型態的斷面圖。 Fig. 1 is a cross-sectional view showing an embodiment of a packaging material of the present invention.
【圖2】表示本發明的電池的一實施型態的斷面圖。 Fig. 2 is a cross-sectional view showing an embodiment of the battery of the present invention.
【圖3】表示下述狀態之電池的模式的斷面圖,前述狀態為,藉由內壓及溫度的過度上升,使內側層產生貫通排氣路,同時於內側層與金屬箔層之間產生剝離間隙的電池外殼內氣體向外部洩漏,從而防止內壓上升而導致的破裂之狀態。 [Fig. 3] A cross-sectional view showing a battery mode in a state in which the inner layer generates a through-exhaust path through an excessive rise in internal pressure and temperature, and is between the inner layer and the metal foil layer. Gas in the battery case that has a peeling gap leaks to the outside, thereby preventing a state of cracking due to an increase in internal pressure.
【圖4】表示下述狀態之電池的模式的斷面圖,前述狀態為,藉由內壓及溫度的過度上升,而在各內側層彼此所形成的熱封部中,產生連通電池外殼內部空間與外部的內外連通排氣路,使電池外殼內的氣體藉由此內外貫通排氣路向外部洩漏,從而防止由內壓上升而導致的破裂之狀態。 [Fig. 4] A cross-sectional view showing a battery mode in a state where the internal pressure and temperature are excessively increased, and a heat-sealed portion formed by each inner layer is connected to the inside of the battery case. The space communicates with the outside and inside and outside of the exhaust path, so that the gas in the battery case leaks to the outside through the inside and outside through the exhaust path, thereby preventing the state of rupture caused by the increase in internal pressure.
【圖5】表示本發明的包裝材的其他實施型態的斷面圖。 Fig. 5 is a sectional view showing another embodiment of the packaging material of the present invention.
【圖6】表示本發明的包裝材的另一其他實施型態的斷面圖。 Fig. 6 is a sectional view showing still another embodiment of the packaging material of the present invention.
圖1表示本發明的包裝材1的一實施型態。此包裝材,是作為電池用外裝材所使用。前述包裝材1,是由金屬箔層4的上面隔著第1接著劑層5與耐熱性樹脂層(外側層)2施以積層一體化,同時於前述金 屬箔層4的下面隔著第2接著劑層6與熱可塑性樹脂層(內側層)3施以積層一體化而構成。 FIG. 1 shows an embodiment of the packaging material 1 of the present invention. This packaging material is used as a battery exterior material. The packaging material 1 is laminated and integrated on the upper surface of the metal foil layer 4 through the first adhesive layer 5 and the heat-resistant resin layer (outer layer) 2, and is simultaneously applied to the gold The lower surface of the metal foil layer 4 is configured by laminating and integrating the second adhesive layer 6 and the thermoplastic resin layer (inner layer) 3.
前述熱可塑性樹脂層(內側層)3,具備即使對於鋰離子蓄電池等使用的腐蝕性高的電解液等,亦有優異的耐藥品性,並同時擔負著賦予包裝材1熱密封性的作用者。 The above-mentioned thermoplastic resin layer (inner layer) 3 has excellent chemical resistance even for highly corrosive electrolytes used in lithium ion batteries and the like, and is also responsible for imparting heat sealability to the packaging material 1 .
本發明中,前述熱可塑性樹脂層(熱封層)3,係採用至少含有以樹脂組成物形成之混合樹脂層31的構成,該樹脂組成物係含有:由低熔點且高流動之聚烯烴樹脂所成之第1樹脂、及由高熔點且低流動之聚烯烴樹脂所成之第2樹脂。前述混合樹脂層31中,第1樹脂與第2樹脂為熔融混合。由於是採用如此特定的構成,因此,例如,在電池過升溫時電池本體部中會產生氣體並積蓄而使內壓上升,同時並使包裝材1所構成的電池外殼11的溫度過度上升,此時在構成內側層3的混合樹脂層31中,低熔點且高流動的第1樹脂,會較高熔點且低流動的第2樹脂先進行熔融流動,因此可適當降低混合樹脂層31的強度,混合樹脂層31因內壓而被破壞,藉此,於內側層3產生與電池外殼11的內部空間12連通的貫通排氣路21,同時於內側層3與金屬箔層4之間產生剝離間隙22,電池外殼11(外裝材1)內部的氣體即可向外部洩漏,從而可防止由包裝材1構成的電池外殼11等因內壓上升而導致的破裂(包裝材的爆裂)的情形。 In the present invention, the thermoplastic resin layer (heat-sealing layer) 3 is configured to include at least a mixed resin layer 31 formed of a resin composition containing a low-melting point and high-flowing polyolefin resin. The first resin formed and the second resin made of a polyolefin resin having a high melting point and a low flow. In the mixed resin layer 31, the first resin and the second resin are melt-mixed. Since such a specific structure is adopted, for example, when the battery body is overheated, gas is generated in the battery main body and accumulated to increase the internal pressure, and at the same time, the temperature of the battery case 11 constituted by the packaging material 1 is excessively increased. In the mixed resin layer 31 constituting the inner layer 3, the first resin having a low melting point and high flow will melt the second resin having a higher melting point and low flow first, so the strength of the mixed resin layer 31 can be appropriately reduced. The mixed resin layer 31 is destroyed by the internal pressure, thereby generating a through-exhaust passage 21 in the inner layer 3 communicating with the inner space 12 of the battery case 11 and a peeling gap between the inner layer 3 and the metal foil layer 4 22. The gas inside the battery case 11 (the exterior material 1) can leak to the outside, so that the battery case 11 and the like made of the packaging material 1 can be prevented from being broken (the packaging material bursts) due to an increase in the internal pressure.
又,圖1所示包裝材1中,前述熱可塑性樹脂層3是由前述混合樹脂層31所成之構成(單層構成),然而本發明並無特別限定為如此之單層構成,前述熱可塑性樹脂層3亦可為至少含有前述混合樹脂層31 所成之複數層構造。其中,前述熱可塑性樹脂層(熱封層)3,較佳係採用至少含有:配置於最內側之前述混合樹脂層31、配置於前述混合樹脂層31及前述金屬箔層4間之單一聚烯烴樹脂所成單一樹脂層32,此2層以上之積層構造的構成(參照圖5)。前述混合樹脂層31與前述金屬箔層4之間,是配置有單一的聚烯烴樹脂所成之單一樹脂層,因此可充分確保熱封後的熱可塑性樹脂層(內側層)3整體的厚度,從而確保安定的密封性與絕緣性。 In the packaging material 1 shown in FIG. 1, the thermoplastic resin layer 3 is composed of the mixed resin layer 31 (single-layer structure). However, the present invention is not particularly limited to such a single-layer structure. The plastic resin layer 3 may include at least the aforementioned mixed resin layer 31 The resulting multi-layer structure. Among them, the thermoplastic resin layer (heat-sealing layer) 3 is preferably a single polyolefin containing at least the aforementioned mixed resin layer 31 disposed on the innermost side, the aforementioned mixed resin layer 31 and the metal foil layer 4. The structure of a single resin layer 32 made of resin and a laminated structure of two or more layers (see FIG. 5). A single resin layer made of a single polyolefin resin is arranged between the mixed resin layer 31 and the metal foil layer 4, so the thickness of the entire thermoplastic resin layer (inner layer) 3 after heat sealing can be sufficiently ensured. In order to ensure stable sealing and insulation.
以下,說明關於構成前述熱可塑性樹脂層3的樹脂等。 Hereinafter, the resin etc. which comprise the said thermoplastic resin layer 3 are demonstrated.
前述混合樹脂層31,係由含有:聚烯烴樹脂所成之第1樹脂、及聚烯烴樹脂所成之第2樹脂的樹脂組成物所形成。在此,前述第1樹脂,其熔點係較前述第2樹脂為低,而其MFR則較前述第2樹脂為大。亦即,前述第2樹脂,其熔點較前述第1樹脂高,而其MFR較前述第1樹脂小。 The mixed resin layer 31 is formed of a resin composition containing a first resin made of a polyolefin resin and a second resin made of a polyolefin resin. Here, the melting point of the first resin is lower than that of the second resin, and the MFR is higher than that of the second resin. That is, the melting point of the second resin is higher than that of the first resin, and the MFR is lower than that of the first resin.
前述第1樹脂,是使用MFR為10g/10min以上的聚烯烴樹脂,同時,前述第2樹脂,是使用MFR未達10g/10min的聚烯烴樹脂為佳,此時,可充分防止內壓上升而導致的包裝材破裂情形。 The first resin is preferably a polyolefin resin having an MFR of 10 g / 10 min or more, and the second resin is preferably a polyolefin resin having an MFR of less than 10 g / 10 min. At this time, it is possible to sufficiently prevent an increase in internal pressure and The resulting packaging material rupture.
前述第1樹脂,是使用MFR為10g/10min~40g/10min的聚烯烴樹脂為佳。第1樹脂的MFR在40g/10min以下可提高第1樹脂與第2樹脂的相互分散性,從而使混合樹脂層31有良好外觀。 The first resin is preferably a polyolefin resin having an MFR of 10 g / 10 min to 40 g / 10 min. When the MFR of the first resin is 40 g / 10 min or less, the mutual dispersibility of the first resin and the second resin can be improved, and the mixed resin layer 31 can have a good appearance.
前述第2樹脂,是使用MFR為0.5g/10min以上 未達10g/10min的聚烯烴樹脂為佳。MFR在0.5g/10min以上,可使第1樹脂與第2樹脂充分熔融混合。 The second resin uses an MFR of 0.5 g / 10 min or more. Polyolefin resins less than 10 g / 10 min are preferred. The MFR is 0.5 g / 10 min or more, and the first resin and the second resin can be sufficiently melt-mixed.
此外,前述第1樹脂,是使用熔點為105℃以上未達140℃的聚烯烴樹脂,同時,前述第2樹脂,是使用熔點為135℃以上180℃以下範圍的聚烯烴樹脂(當然,此時,第2樹脂之熔點較第1樹脂之熔點為高)為佳,此時,可充分防止內壓上升而導致的包裝材破裂。又,前述第2樹脂的熔點為180℃以下,從而可提升熱封性。 The first resin is a polyolefin resin having a melting point of 105 ° C to 140 ° C, and the second resin is a polyolefin resin having a melting point of 135 ° C to 180 ° C (Of course, at this time (The melting point of the second resin is higher than the melting point of the first resin). At this time, the packaging material can be prevented from being broken due to an increase in internal pressure. In addition, since the melting point of the second resin is 180 ° C. or lower, heat sealability can be improved.
前述第1樹脂,是使用熔點為120℃以上未達140℃的聚烯烴樹脂為佳。第1樹脂的熔點為120℃以上,可藉此提升前述熱可塑性樹脂層3的耐熱性。 The first resin is preferably a polyolefin resin having a melting point of 120 ° C or higher and less than 140 ° C. The melting point of the first resin is 120 ° C. or higher, which can improve the heat resistance of the thermoplastic resin layer 3.
此外,前述第2樹脂的熔點,是較前述第1樹脂的熔點高3℃以上為佳,此時,可充分防止內壓上升而導致的包裝材破裂。其中,前述第2樹脂的熔點,是較前述第1樹脂的熔點高5℃以上更佳,高10℃以上特佳。 The melting point of the second resin is preferably higher than the melting point of the first resin by 3 ° C or more. In this case, the packaging material can be sufficiently prevented from being broken due to an increase in internal pressure. The melting point of the second resin is more preferably 5 ° C or higher than the melting point of the first resin, and particularly preferably 10 ° C or higher.
前述混合樹脂層31中的第1樹脂與第2樹脂的混合比率,雖無特別限定,但較佳是設定為第1樹脂/第2樹脂=2/8~8/2(質量比),此時,可提高第1樹脂與第2樹脂的相互分散性,從而使混合樹脂層31有良好的外觀。其中,特佳是設定為第1樹脂/第2樹脂=4/6~6/4(質量比)。 Although the mixing ratio of the first resin and the second resin in the mixed resin layer 31 is not particularly limited, it is preferable to set the ratio of the first resin / the second resin to 2/8 to 8/2 (mass ratio). In this case, the mutual dispersibility of the first resin and the second resin can be improved, and the mixed resin layer 31 can have a good appearance. Among them, it is particularly preferable to set the first resin / second resin = 4/6 to 6/4 (mass ratio).
構成前述熱可塑性樹脂層3(混合樹脂層31及單一樹脂層32等)的聚烯烴樹脂(的種類),雖無特別限定,但可列舉例如,聚乙烯樹脂、聚丙烯樹脂、烯烴共聚物樹脂、聚乙烯樹脂的酸變性物、聚丙烯樹 脂的酸變性物、烯烴共聚物樹脂的酸變性物等。 The polyolefin resin (kind) constituting the thermoplastic resin layer 3 (mixed resin layer 31, single resin layer 32, etc.) is not particularly limited, but examples thereof include polyethylene resins, polypropylene resins, and olefin copolymer resins. , Acid denaturation of polyethylene resin, polypropylene tree Acid denatured products of lipids, acid denatured products of olefin copolymer resins, and the like.
前述聚烯烴樹脂的MFR,例如,可藉由在製造聚烯烴樹脂時,變更氫、乙烯等鏈轉移劑的添加量而調整。 The MFR of the polyolefin resin can be adjusted, for example, by changing the addition amount of a chain transfer agent such as hydrogen or ethylene when producing a polyolefin resin.
前述聚烯烴樹脂的熔點,例如,對於聚丙烯樹脂而言,可藉由變更乙烯、1-丁烯等其他烯烴成分相對於丙烯的共聚比例(包含共聚比例0質量%)而調整,對於聚乙烯樹脂而言,可藉由變更1-丁烯、1-己烯等其他烯烴成分相對於丙烯的共聚比例(包含共聚比例0質量%)而調整。 The melting point of the polyolefin resin can be adjusted, for example, for polypropylene resins by changing the copolymerization ratio (including the copolymerization ratio of 0% by mass) of other olefin components such as ethylene and 1-butene with respect to propylene. The resin can be adjusted by changing the copolymerization ratio (including the copolymerization ratio of 0% by mass) of other olefin components such as 1-butene and 1-hexene to propylene.
得到構成前述混合樹脂層31的樹脂組成物(含有第1樹脂及第2樹脂的樹脂組成物)時,可預先使用各種混練機將第1樹脂及第2樹脂熔融混合,薄膜成形時,可使用滾筒、亨舍爾混合機、計量進料器等,將球狀或粉狀的第1樹脂及第2樹脂進行乾式層壓後,供給T模成形機使其一邊熔融混合一邊成形為薄膜。 When the resin composition (resin composition containing the first resin and the second resin) constituting the mixed resin layer 31 is obtained, the first resin and the second resin can be melt-mixed using various kneading machines in advance, and can be used for film molding A roller, a Henschel mixer, a metering feeder, etc. dry-laminate the spherical or powdered first resin and the second resin, and then supply the T-die molding machine to form a film while melting and mixing.
前述熱可塑性樹脂層3,是由未延伸薄膜所構成為佳。構成前述熱可塑性樹脂層3的樹脂薄膜,可由例如T模成形機、吹脹成型機等成形。 The thermoplastic resin layer 3 is preferably composed of an unstretched film. The resin film constituting the thermoplastic resin layer 3 can be formed by, for example, a T-die molding machine or an inflation molding machine.
前述熱可塑性樹脂層3的厚度,是設定於20μm~80μm為佳。藉由設定在20μm以上,可充分地防止針孔的產生,藉由設定在80μm以下,可降低樹脂用量而達到成本的降低。其中,前記熱可塑性樹脂層3的厚度設定於30μm~50μm為特佳。 The thickness of the thermoplastic resin layer 3 is preferably set to 20 μm to 80 μm . By setting it at 20 μm or more, it is possible to sufficiently prevent the occurrence of pinholes. By setting it at 80 μm or less, the amount of resin can be reduced and the cost can be reduced. Among them, the thickness of the thermoplastic resin layer 3 described above is particularly preferably set to 30 μm to 50 μm .
前述耐熱性樹脂層(外側層)2,是主要擔負確保作為外裝材具有良好成形性的作用的元件,亦即,其是擔負防止金屬箔因縮頸而斷 裂的角色。 The heat-resistant resin layer (outer layer) 2 is an element mainly responsible for ensuring good moldability as an exterior material, that is, it is responsible for preventing the metal foil from being broken due to necking. Cracked role.
前述耐熱性樹脂層(外側層)2,雖無特別限定,但可使用例如,延伸聚醯胺薄膜(延伸尼龍薄膜等)、延伸聚酯薄膜為佳。其中,前述耐熱性樹脂層(外側層)2,係以由二軸延伸聚醯胺薄膜(延伸尼龍薄膜等)、二軸延伸聚對苯二甲酸丁二醇酯(PBT)膜、二軸延伸聚對苯二甲酸乙二醇酯(PET)膜、二軸延伸聚萘二甲酸乙二醇酯(PEN)膜所構成者為特佳。前述尼龍,雖無特別限定,但可列舉為例如,尼龍6、尼龍66、尼龍MXD等。又,前述耐熱性樹脂層2,可由單層(單一的延伸薄膜)所形成,或,亦可由例如延伸聚酯薄膜/延伸聚醯胺薄膜所成的複數層(二軸延伸PET薄膜/二軸延伸尼龍薄膜所成複數層等)所形成者。 Although the heat-resistant resin layer (outer layer) 2 is not particularly limited, for example, a stretched polyamide film (stretched nylon film, etc.), or a stretched polyester film is preferably used. The heat-resistant resin layer (outer layer) 2 includes a biaxially stretched polyimide film (e.g., a nylon film), a biaxially stretched polybutylene terephthalate (PBT) film, and a biaxially stretched film. Polyethylene terephthalate (PET) film and biaxially stretched polyethylene naphthalate (PEN) film are particularly preferred. Although the nylon is not particularly limited, examples thereof include nylon 6, nylon 66, and nylon MXD. The heat-resistant resin layer 2 may be formed of a single layer (a single stretched film) or a plurality of layers (for example, a biaxially stretched PET film / biaxially stretched polyester film / polyamide film). Extending multiple layers of nylon film, etc.).
其中,前述耐耐熱性樹脂層2,是含有:配置於外側的二軸延伸聚酯薄膜、及配置於第1接著劑層5側的二軸延伸聚醯胺薄膜,此等複數層所構成為佳。進一步,前述耐熱性樹脂層2,是含有:配置於外側的二軸延伸聚對苯二甲酸乙二醇酯薄膜、及配置於第1接著劑層5側的二軸延伸尼龍薄膜,此等複數層所構成更佳。 The heat-resistant resin layer 2 includes a biaxially stretched polyester film disposed on the outside and a biaxially stretched polyamide film disposed on the first adhesive layer 5 side. The plurality of layers are composed of good. Furthermore, the heat-resistant resin layer 2 includes a biaxially stretched polyethylene terephthalate film disposed on the outside and a biaxially stretched nylon film disposed on the first adhesive layer 5 side. The layer composition is better.
前述耐熱性樹脂薄膜層2的厚度,設定在12μm~50μm為佳。 The thickness of the heat-resistant resin film layer 2 is preferably set to 12 μm to 50 μm.
又,前述耐熱性樹脂層2、前記熱可塑性樹脂層3,不論何者皆可為單層,亦可為複數層。 The heat-resistant resin layer 2 and the aforementioned thermoplastic resin layer 3 may be a single layer or a plurality of layers.
前述金屬箔層4,係擔負賦予包裝材1阻止氧氣或水分入侵的阻氣性之作用者。前述金屬箔層4的厚度,是以使用20μm~120μ m的鋁箔為佳。此外,前述金屬箔層4,是使用含有鐵0.5質量%~2.0質量%、二氧化矽0.03質量%~0.5質量%的鋁箔進行燒製處理而成者為佳。 The metal foil layer 4 is responsible for providing the packaging material 1 with gas barrier properties to prevent oxygen or moisture from entering. The thickness of the metal foil layer 4 is 20 μm to 120 μ m aluminum foil is preferred. The metal foil layer 4 is preferably one obtained by firing an aluminum foil containing 0.5% by mass to 2.0% by mass of iron and 0.03% by mass to 0.5% by mass of silicon dioxide.
包裝材1的外側層2及內側層3是由樹脂所成的層,此等的樹脂層中雖極微量,但有由外殼外部,侵入光、氧氣、液體的可能性,亦有由內部的內容物(電池的電解液、食品、醫藥品等)滲入的可能性。此等的侵入物到達金屬箔層4時,會形成金屬箔層4的腐蝕原因。本發明中,是以在前述金屬箔至少與前述熱可塑性樹脂層3側的面形成化成皮膜者為佳。其中,採用前述金屬箔的兩面皆形成化成皮膜的構成者為特佳,此時,可充分提高金屬箔層4的耐腐蝕性。此外,亦可採用僅在前述金屬箔的任一單面形成上述化成皮膜的構成。 The outer layer 2 and the inner layer 3 of the packaging material 1 are layers made of resin. Although these resin layers are extremely small, there is a possibility that light, oxygen, and liquid may enter from the outside of the casing, and may be inside. Possibility of penetration of contents (battery electrolyte, food, medicine, etc.). When these intruders reach the metal foil layer 4, a cause of corrosion of the metal foil layer 4 is formed. In the present invention, it is preferable to form a chemical conversion film on at least the surface of the metal foil and the thermoplastic resin layer 3 side. Among them, it is particularly preferable to use a constitution in which a chemical conversion film is formed on both sides of the metal foil. In this case, the corrosion resistance of the metal foil layer 4 can be sufficiently improved. In addition, a configuration in which the chemical conversion film is formed on only one side of the metal foil may be employed.
前述化成皮膜,是金屬箔表面施行化成處理所形成的皮膜,例如,可藉由對金屬箔進行鉻酸鹽處理,利用鋯化合物施行非鉻型化成處理皆可形成。例如,鉻酸鹽處理時,可在進行脫脂處理的金屬箔表面上,塗布下述1)~3)中任一項的混合物的水溶液後使其乾燥。 The chemical conversion film is a film formed by performing a chemical conversion treatment on the surface of the metal foil. For example, it can be formed by performing a chromate treatment on the metal foil and performing a non-chromium type chemical conversion treatment using a zirconium compound. For example, in the case of chromate treatment, an aqueous solution of the mixture of any one of 1) to 3) below may be applied to the surface of the metal foil subjected to degreasing treatment and then dried.
1)含有選自磷酸、鉻酸、氟化物的金屬鹽及氟化物的非金屬鹽所成群中至少1種的化合物,其混合物的水溶液 1) An aqueous solution containing a mixture of at least one compound selected from the group consisting of phosphoric acid, chromic acid, metal salts of fluorides and non-metal salts of fluorides, and mixtures thereof
2)含有選自磷酸、丙烯酸系樹脂、殼聚醣衍生物樹脂(Chitosan derivative resins)及苯酚系樹脂所成群中至少1種的樹脂,及選自鉻酸及鉻(III)鹽所成群中至少1種的化合物,其混合物的水溶液 2) A resin containing at least one selected from the group consisting of phosphoric acid, acrylic resin, Chitosan derivative resins, and phenol resin, and a group selected from chromic acid and chromium (III) salt At least one compound in water mixture
3)含有選自磷酸、丙烯酸系樹脂、殼聚醣衍生物樹脂、苯酚系樹脂所成群中至少1種的樹脂,及選自鉻酸及鉻(III)鹽所成群中至少1種的 化合物,及選自氟化物的金屬鹽及氟化物的非金屬鹽所成群中至少1種的化合物,其混合物的水溶液。 3) A resin containing at least one member selected from the group consisting of phosphoric acid, an acrylic resin, a chitosan derivative resin, and a phenol-based resin, and at least one member selected from the group consisting of chromic acid and a chromium (III) salt. An aqueous solution of a compound and at least one compound selected from the group consisting of a metal salt of a fluoride and a non-metal salt of a fluoride, and a mixture thereof.
前述化成皮膜,其鉻附著量(單面)為0.1mg/m2~50mg/m2為佳,2mg/m2~20mg/m2為特佳。如此鉻附著量的化成皮膜可得到高耐腐蝕性的包裝材。 In the aforementioned chemical conversion film, the chromium adhesion amount (one side) is preferably 0.1 mg / m 2 to 50 mg / m 2 , and 2 mg / m 2 to 20 mg / m 2 is particularly preferable. Such a chemical conversion film with a chromium adhesion amount can obtain a packaging material with high corrosion resistance.
前述第1接著劑層5,雖無特別限定,但可列舉例如,聚氨酯系接著劑層、丙烯酸系酯膠接著劑層、聚酯聚氨酯樹脂接著劑層等。 The first adhesive layer 5 is not particularly limited, but examples thereof include a polyurethane-based adhesive layer, an acrylic ester adhesive layer, a polyester polyurethane resin adhesive layer, and the like.
前述第2接著劑層6,可列舉例如,馬來酸酐變性的聚乙烯、馬來酸酐變性聚丙烯所形成接著劑層等。 Examples of the second adhesive layer 6 include an adhesive layer formed of maleic anhydride-denatured polyethylene and a maleic anhydride-denatured polypropylene.
前述熱可塑性樹脂層3或前述耐熱性樹脂層2,亦可添加含有添加劑。此等添加劑,雖無特別限定,但可列舉例如,防黏連劑(二氧化矽、滑石、高嶺土、丙烯酸樹脂珠等)、潤滑劑(脂肪酸酰胺、蠟等)、抗氧化劑(受阻酚等)等。 The thermoplastic resin layer 3 or the heat-resistant resin layer 2 may contain an additive. These additives are not particularly limited, but examples thereof include anti-blocking agents (silicon dioxide, talc, kaolin, acrylic resin beads, etc.), lubricants (fatty acid amides, waxes, etc.), and antioxidants (hindered phenols, etc.) Wait.
又,本發明的包裝材1中,前述耐熱性樹脂層2,並非必須的構成層,可如圖6所示,可採用前述金屬箔層4的一側的面隔著第2接著劑層6與前述熱可塑性樹脂樹脂層(內側層)3形成積層一體化的構成。 In the packaging material 1 of the present invention, the heat-resistant resin layer 2 is not an essential constituent layer, and as shown in FIG. 6, a side of the metal foil layer 4 may be used with a second adhesive layer 6 interposed therebetween. A layered and integrated structure is formed with the thermoplastic resin resin layer (inner layer) 3.
圖2是表示本發明的電池的一實施型態。本發明的電池10,其具備2張上述本發明的包裝材1,且同時具備電池本體部15。前述電池本體部15,其含有正極、負極及電解質。 FIG. 2 shows an embodiment of the battery of the present invention. The battery 10 of the present invention includes two sheets of the packaging material 1 of the present invention, and also includes a battery body portion 15. The battery body portion 15 includes a positive electrode, a negative electrode, and an electrolyte.
前述2張之包裝材1中至少一方的包裝材1A,是藉由成形(鼓脹成形、深引伸成形等)步驟而成形為略直方體形狀等立體形狀,另一方的包裝材1B,則不進行成形而為平面狀(參照圖2)。 The packaging material 1A of at least one of the aforementioned two packaging materials 1 is formed into a three-dimensional shape such as a substantially rectangular parallelepiped shape by a forming (blowing molding, deep drawing molding, etc.) step, and the other packaging material 1B is not performed. It is formed into a flat shape (see FIG. 2).
並且,將前述電池本體部15配置於前述2張的包裝材1A、1B之間,並將前述2張的包裝材1A、1B的內側層3、3的各周緣部藉由熱封而密封接合形成電池外殼11,將電池本體部15封入該電池外殼11的內部空間12(參照圖2)。 The battery body portion 15 is disposed between the two sheets of packaging materials 1A and 1B, and the peripheral portions of the inner layers 3 and 3 of the two sheets of packaging materials 1A and 1B are hermetically sealed by heat sealing. The battery case 11 is formed, and the battery body portion 15 is sealed in the internal space 12 of the battery case 11 (see FIG. 2).
前述電池10,電池過升溫時電池本體部15中會產生氣體積蓄而使內壓上升,同時並使電池外殼11溫度上升至120℃~160℃範圍時,在前述內側層3進行前述成形步驟而形成的彎曲狀或扭曲狀的角落部13或其附近位置,可容易產生前述貫通排氣路。 In the battery 10, when the battery body portion 15 is overheated, a gas volume is generated in the battery body portion 15 to increase the internal pressure, and at the same time the temperature of the battery case 11 is increased to a range of 120 ° C to 160 ° C, the forming step is performed on the inner layer 3 to The formed bent or twisted corner portion 13 or its vicinity can easily generate the aforementioned through-ventilation passage.
從而,前述電池10,在電池過升溫時電池本體部15中會產生氣體積蓄而使內壓上升同時並使電池外殼11的溫度上升至120℃~160℃的範圍時,將因為混合樹脂層31被破壞等原因,在內側層3的角落部13或其附近位置,產生連通電池外殼11的內部空間12的貫通排氣路21,並同時於金屬箔層4與內側層3之間,產生連通前述貫通排氣路21的剝離間隙22,因此前述電池外殼11內的氣體,可通過前述貫通排氣路21及前述剝離間隙22向外部洩漏,防止因內壓上升而導致的電池外殼11的破裂(參照圖3)。 Therefore, in the battery 10, when the battery body 15 is overheated, a gas volume is generated in the battery body portion 15 to increase the internal pressure and increase the temperature of the battery case 11 to a range of 120 ° C to 160 ° C. Due to damage or the like, in the corner portion 13 of the inner layer 3 or its vicinity, a through-exhaust passage 21 communicating with the inner space 12 of the battery case 11 is generated, and at the same time, communication is made between the metal foil layer 4 and the inner layer 3 The peeling gap 22 penetrating through the exhaust passage 21 allows the gas in the battery case 11 to leak to the outside through the penetrating exhaust passage 21 and the peeling gap 22 to prevent the battery case 11 from being broken due to an increase in internal pressure. (See Figure 3).
更進一步,氣體通過前述剝離間隙22向外部洩漏後,由第2接著劑層6而間隔的各接著劑可因熱而快速融著(接著),並封閉該剝離間隙22,從而可防止電解液向外部流出。 Furthermore, after the gas leaks to the outside through the peeling gap 22, each of the adhesives separated by the second adhesive layer 6 can be quickly melted (adhered) by heat, and the peeling gap 22 can be closed to prevent the electrolyte. Outflow.
前述第2接著劑層6,是以藉由乾式層壓法而形成的熔點為60℃~100℃的接著劑層為佳。此時,氣體通過前述剝離間隙22向外部洩漏後,由第2接著劑層6而間隔的各接著劑可因熱而更加快速融著 (接著),並封閉該剝離間隙22,從而可充分防止電池的內溶液向外部流出。 The second adhesive layer 6 is preferably an adhesive layer having a melting point of 60 ° C. to 100 ° C. formed by a dry lamination method. At this time, after the gas leaks to the outside through the peeling gap 22, each adhesive spaced by the second adhesive layer 6 can be more quickly melted by heat. (Next) By closing the peeling gap 22, the internal solution of the battery can be sufficiently prevented from flowing to the outside.
如此地氣體向外部洩漏後,剝離間隙22可立即由第2接著劑層6而封閉(隔離的各第2接著劑因熱而融著並將剝離間隙22封閉),進而可阻止電解液的流出,因此本發明的電池10,可謂是具備有安全閥機構。 After the gas leaks to the outside in this way, the peeling gap 22 can be immediately closed by the second adhesive layer 6 (the isolated second adhesives are melted by the heat and close the peeling gap 22), thereby preventing the electrolyte from flowing out. Therefore, the battery 10 of the present invention can be said to be equipped with a safety valve mechanism.
又,圖3是表示電池外殼11的4個角落部13中,右下的角落部13,其產生貫通排氣路21的狀態,但並不特別以此型態為限,例如,可是於左下的角落部13產生貫通排氣路21,或右上角落部13或左下角落部13產生貫通排氣路21亦可,或者是可於電池外殼11的其他部位產生貫通排氣路21。 In addition, FIG. 3 shows a state in which the lower right corner portion 13 of the four corner portions 13 of the battery case 11 penetrates the exhaust passage 21, but is not particularly limited to this type. For example, The corner portion 13 may generate the through-exhaust passage 21, or the upper right corner portion 13 or the lower-left corner 13 may generate the through-exhaust passage 21, or the through-exhaust passage 21 may be generated in other parts of the battery case 11.
此外,圖3是表示形成剝離間隙22時,第2接著劑層6殘留於金屬箔層4及內側層3兩者上的型態,但並不特別以此型態為限,例如,可為第2接著劑層6的大部分附著於金屬箔層4側的型態,或第2接著劑層6的大部分附著於內側層3側的型態亦可。 In addition, FIG. 3 shows a type in which the second adhesive layer 6 remains on both the metal foil layer 4 and the inner layer 3 when the peeling gap 22 is formed, but it is not particularly limited to this type. For example, it may be A type in which most of the second adhesive layer 6 is adhered to the metal foil layer 4 side, or a type in which most of the second adhesive layer 6 is adhered to the inner layer 3 side may be used.
除了上述圖3所示機構(貫通排氣路21及剝離間隙22)以外,亦有由圖4所示機構完成擔負使氣體向外部洩漏的安全閥角色。亦即,前述電池10中,電池過升溫時電池本體部15中會產生氣體積蓄而使內壓上升,同時並使電池外殼11的溫度上升至120℃~160℃範圍時,於前述2張包裝材1的各內側層3所形成熱封部中,其將因為混合樹脂層31被破壞等原因,產生連通電池外殼11的內部空間12與外部的內外連通排氣路25,因此電池外殼11內的氣體,可通過內外連通排 氣路25向外部洩漏,並防止因內壓上升而導致的電池外殼11破裂情形(參照圖4)。 In addition to the mechanism shown in FIG. 3 (through the exhaust passage 21 and the separation gap 22) described above, the mechanism shown in FIG. 4 also performs the role of a safety valve that allows gas to leak to the outside. That is, in the battery 10, when the battery overheats, a gas volume is generated in the battery body portion 15 to increase the internal pressure, and at the same time the temperature of the battery case 11 is raised to a range of 120 ° C to 160 ° C, the two packages are packed In the heat-sealed portion formed by each of the inner layers 3 of the material 1, due to damage to the mixed resin layer 31, etc., the internal space 12 connecting the battery case 11 and the external inside and outside communicating with the exhaust path 25 are generated. Gas can be exhausted through internal and external communication The gas path 25 leaks to the outside and prevents the battery case 11 from being broken due to an increase in internal pressure (see FIG. 4).
又,本發明中,電池外殼的內壓上升時,使氣體向外部洩漏的機構,雖大多是如圖3所示機構或如圖4所示機構中的任一情形,但本發明並無特別限制於如此的機構所成者。不論如何,僅使用本發明的包裝材1,即可藉由電池外殼的內壓的上升使得混合樹脂層31被破壞的原因,從而使電池外殼內的氣體可安全向外部洩漏。 Moreover, in the present invention, when the internal pressure of the battery case rises, the mechanism for leaking gas to the outside is mostly either the mechanism shown in FIG. 3 or the mechanism shown in FIG. 4, but the invention is not particularly limited. Restricted to those who are formed by such institutions. In any case, by using only the packaging material 1 of the present invention, it is possible to cause the mixed resin layer 31 to be destroyed by an increase in the internal pressure of the battery case, so that the gas in the battery case can be leaked to the outside safely.
接著,說明關於本發明的具體實施例,但本發明並不特別限定為此等實施例者。 Next, specific examples of the present invention will be described, but the present invention is not particularly limited to those examples.
〔原材料(內側層用樹脂)〕 [Raw material (resin for inner layer)]
「PP1」...乙烯-丙烯無規共聚物樹脂(熔點:160℃、MFR:7.5g/10min) "PP1" ... ethylene-propylene random copolymer resin (melting point: 160 ° C, MFR: 7.5g / 10min)
「PP2」...乙烯-丙烯無規共聚物樹脂(熔點:140℃、MFR:7.5g/10min) "PP2" ... ethylene-propylene random copolymer resin (melting point: 140 ° C, MFR: 7.5g / 10min)
「PP3」...乙烯-丙烯無規共聚物樹脂(熔點:130℃、MFR:21g/10min) "PP3" ... ethylene-propylene random copolymer resin (melting point: 130 ° C, MFR: 21g / 10min)
「PP4」...乙烯-丙烯無規共聚物樹脂(熔點:125℃、MFR:23g/10min) "PP4" ... ethylene-propylene random copolymer resin (melting point: 125 ° C, MFR: 23g / 10min)
「PP5」...乙烯-丙烯無規共聚物樹脂(熔點:135℃、MFR:20g/10min) "PP5" ... ethylene-propylene random copolymer resin (melting point: 135 ° C, MFR: 20g / 10min)
「PP6」...乙烯-丙烯無規共聚物樹脂(熔點:94℃、MFR:20g/10min) "PP6" ... ethylene-propylene random copolymer resin (melting point: 94 ° C, MFR: 20g / 10min)
「PE1」...中密度聚乙烯樹脂(熔點:140℃、MFR:4g/10min) "PE1" ... medium density polyethylene resin (melting point: 140 ° C, MFR: 4g / 10min)
「PE2」...低密度聚乙烯樹脂(熔點:110℃、MFR:25g/10min)。 "PE2" ... low density polyethylene resin (melting point: 110 ° C, MFR: 25g / 10min).
「PP7」...乙烯-丙烯無規共聚物樹脂(熔點:160℃、MFR:3g/10min) "PP7" ... ethylene-propylene random copolymer resin (melting point: 160 ° C, MFR: 3g / 10min)
「PP8」...乙烯-丙烯無規共聚物樹脂(熔點:150℃、MFR:5g/10min) "PP8" ... ethylene-propylene random copolymer resin (melting point: 150 ° C, MFR: 5g / 10min)
「PE3」...乙烯-1-丁烯共聚物樹脂(線狀低密度聚乙烯樹脂)(熔點:125℃、MFR:6g/10min)。 "PE3" ... ethylene-1-butene copolymer resin (linear low-density polyethylene resin) (melting point: 125 ° C, MFR: 6g / 10min).
又,上述「MFR」,是指以JIS K7210-1999為基準,使用東洋精機股份有限公司製的MFR(熔體流動速率)測定器(商品名:MELT INDEXER),於溫度230℃、負荷2.16kg的條件下所測定的MFR(熔體流動速率)。 The "MFR" refers to an MFR (melt flow rate) measuring device (trade name: MELT INDEXER) manufactured by Toyo Seiki Co., Ltd. based on JIS K7210-1999. The temperature is 230 ° C under a load of 2. MFR (melt flow rate) measured at 16 kg.
此外,上述「熔點」,是指根據JIS K7121-1987「塑膠的轉化溫度測定方法」為基準,使用股份有限公司島津製作所製的DSC(差示掃描熱量計)(型號DSC-60A)以升溫速度10℃/分測定所得DSC曲線而求得的熔融峰溫度(熔點)。 In addition, the above "melting point" refers to a temperature rise rate using a DSC (differential scanning calorimeter) (model DSC-60A) manufactured by Shimadzu Corporation based on JIS K7121-1987 "Method for Measuring the Conversion Temperature of Plastics". The melting peak temperature (melting point) obtained by measuring the obtained DSC curve at 10 ° C / min.
<實施例1> <Example 1>
將上述「PP3」50質量份、上述「PP2」50質量份、 二氧化矽0.1質量份、芥酸醯胺0.1質量份使用滾筒乾式混合後,再使用押出機使其熔融混合,得到樹脂組成物。藉由T型成形機使此樹脂組成物以230℃的樹脂溫度押出,得到厚度40μm的內側層用薄膜。 50 mass parts of "PP3", 50 mass parts of "PP2", After 0.1 parts by mass of silicon dioxide and 0.1 part by mass of erucamide were dry-blended using a roller, the mixture was melt-mixed using an extruder to obtain a resin composition. This resin composition was extruded at a resin temperature of 230 ° C. by a T-shaped molding machine to obtain a film for an inner layer having a thickness of 40 μm.
另一方面,於厚度40μm的鋁箔(A8079-O鋁箔)4的兩面,塗佈聚丙烯酸(丙烯酸系樹脂)、鉻(III)鹽的化合物、磷酸、水、醇所成化成處理液後,進行150℃乾燥,從而準備兩面形成有化成皮膜的兩面鍍鋁箔。此化成皮膜的鉻附著量,單面為5mg/m2。 On the other hand, a polyacrylic acid (acrylic resin), a compound of a chromium (III) salt, a phosphoric acid, water, and an alcohol are applied to both surfaces of a 40 μm-thick aluminum foil (A8079-O aluminum foil) 4 and then, It dried at 150 degreeC, and prepared the double-sided aluminum-plated foil which formed the chemical-film on both sides. The amount of chromium deposited on the formed film was 5 mg / m 2 on one side.
接著,於前述兩面形成化成皮膜的鋁箔4的一側的面,塗佈二液硬化型聚酯聚氨酯系樹脂接著劑,使其乾燥後形成第1接著劑層5,將該第1接著劑層5的表面貼合厚度25μm的二軸延伸6-尼龍薄膜(外側層)2,並同時於前述鋁箔4的另一側的面,塗佈二液硬化型接著劑(酸變性聚丙烯作為主劑,六亞甲基二異氰酸酯作為硬化劑的二液硬化型接著劑),乾燥後形成第2接著劑層6,將該第2接著劑層6的表面,貼合上述厚度40μm的內側層用薄膜(熱可塑性樹脂層)3。藉由將此積層體於40℃環境下放置4天(進行保護),可得到圖1所示構成的包裝材1。 Next, a two-liquid curable polyester polyurethane resin adhesive is applied to one surface of the aluminum foil 4 on which the two surfaces are formed into a film, and the first adhesive layer 5 is formed after drying, and the first adhesive layer is formed. The surface of 5 is bonded to a biaxially stretched 6-nylon film (outer layer) 2 with a thickness of 25 μm. At the same time, a two-liquid curing adhesive (acid-denatured polypropylene is used as the main agent) is coated on the other side of the aluminum foil 4 at the same time. Hexamethylene diisocyanate as a two-liquid curing type adhesive with a curing agent), after drying, a second adhesive layer 6 is formed, and the surface of the second adhesive layer 6 is bonded to the above-mentioned film for an inner layer having a thickness of 40 μm (Thermoplastic resin layer) 3. By leaving this laminated body in a 40 ° C. environment for 4 days (protected), a packaging material 1 having a structure shown in FIG. 1 can be obtained.
<實施例2> <Example 2>
除了樹脂組成物(內側層用薄膜用),是將上述「PP3」50質量份、上述「PP1」50質量份、二氧化矽0.1質量份、芥酸醯胺0.1質量份使用滾筒乾式混合後,使用押出機使其熔融混合而得到樹脂組成物以外,其他皆與實施例1相同,得到圖1所示構成的包裝材1。 Except for the resin composition (for the film for the inner layer), 50 parts by mass of the "PP3", 50 parts by mass of the "PP1", 0.1 part by mass of silicon dioxide, and 0.1 part by mass of erucamide were used. After dry mixing, the extruder was used to melt-mix and obtain a resin composition, and the rest were the same as in Example 1 to obtain a packaging material 1 having a structure shown in FIG. 1.
<實施例3> <Example 3>
除了樹脂組成物(內側層用薄膜用),是將上述「PP4」 70質量份、上述「PP1」30質量份、二氧化矽0.1質量份、芥酸醯胺0.1質量份使用滾筒乾式混合後,使用押出機使其熔融混合而得到的樹脂組成物以外,其他皆與實施例1相同,得到圖1所示構成的包裝材1。 Except for the resin composition (for the film for the inner layer), the above-mentioned "PP4" 70 parts by mass, 30 parts by mass of the above-mentioned "PP1", 0.1 parts by mass of silicon dioxide, and 0.1 parts by mass of erucamide erythramine, dry-mixed using a roller, and melt-mixed using an extruder to obtain a resin composition other than the resin composition Others are the same as in Example 1, and a packaging material 1 having the structure shown in FIG. 1 is obtained.
<實施例4> <Example 4>
除了樹脂組成物(內側層用薄膜用),是將上述「PP5」50質量份、上述「PP2」50質量份、二氧化矽0.1質量份、芥酸醯胺0.1質量份使用滾筒乾式混合後,使用押出機使其熔融混合而得到的樹脂組成物以外,其他皆與實施例1相同,得到圖1所示構成的包裝材1。 Except for the resin composition (for the film for the inner layer), 50 parts by mass of the "PP5", 50 parts by mass of the "PP2", 0.1 part by mass of silicon dioxide, and 0.1 part by mass of erucamide were used. After dry mixing, the resin composition obtained by melt-mixing using an extruder was the same as in Example 1 to obtain a packaging material 1 having a structure shown in FIG. 1.
<實施例5> <Example 5>
除了樹脂組成物(內側層用薄膜用),是將上述「PP4」60質量份、上述「PP2」40質量份、二氧化矽0.1質量份、芥酸醯胺0.1質量份使用滾筒乾式混合後,使用押出機使其熔融混合而得到的樹脂組成物以外,其他皆與實施例1相同,得到圖1所示構成的包裝材1。 Except for the resin composition (for the film for the inner layer), 60 parts by mass of the "PP4", 40 parts by mass of the "PP2", 0.1 part by mass of silicon dioxide, and 0.1 part by mass of erucamide were used. After dry mixing, the resin composition obtained by melt-mixing using an extruder was the same as in Example 1 to obtain a packaging material 1 having a structure shown in FIG. 1.
<實施例6> <Example 6>
除了樹脂組成物(內側層用薄膜用),是將上述「PP4」30質量份、上述「PP1」70質量份、二氧化矽0.1質量份、芥酸醯胺0.1質量份使用滾筒乾式混合後,使用押出機使其熔融混合而得到的樹脂組成物以外,其他皆與實施例1相同,得到圖1所示構成的包裝材1。 Except for the resin composition (for the film for the inner layer), 30 parts by mass of the "PP4", 70 parts by mass of the "PP1", 0.1 part by mass of silicon dioxide, and 0.1 part by mass of erucamide were used. After dry mixing, the resin composition obtained by melt-mixing using an extruder was the same as in Example 1 to obtain a packaging material 1 having a structure shown in FIG. 1.
<實施例7> <Example 7>
除了樹脂組成物(內側層用薄膜用),是將上述「PP5」80質量份、上述「PP1」20質量份、二氧化矽0.1質量份、芥酸醯胺0.1質量份使用滾筒乾式混合後,使用押出機使其熔融混合而得到的樹脂組成物以外,其他皆與實施例1相同,得到圖1所示構成的包裝材1。 Except for the resin composition (for the film for the inner layer), 80 parts by mass of the "PP5", 20 parts by mass of the "PP1", 0.1 part by mass of silicon dioxide, and 0.1 part by mass of erucamide were used. After dry mixing, the resin composition obtained by melt-mixing using an extruder was the same as in Example 1 to obtain a packaging material 1 having a structure shown in FIG. 1.
<實施例8> <Example 8>
除了樹脂組成物(內側層用薄膜用),是將上述「PE2」70質量份、上述「PE1」30質量份、二氧化矽0.1質量份、芥酸醯胺0.1質量份使用滾筒乾式混合後,使用押出機使其熔融混合而得到的樹脂組成物以外,其他皆與實施例1相同,得到圖1所示構成的包裝材1。 Except for the resin composition (for the film for the inner layer), 70 parts by mass of the "PE2", 30 parts by mass of the "PE1", 0.1 part by mass of silicon dioxide, and 0.1 part by mass of erucamide were used. After dry mixing, the resin composition obtained by melt-mixing using an extruder was the same as in Example 1 to obtain a packaging material 1 having a structure shown in FIG. 1.
<比較例1> <Comparative example 1>
除了樹脂組成物(內側層用薄膜用),是將上述「PP1」100質量份、二氧化矽0.1質量份、芥酸醯胺0.1質量份使用滾筒乾式混合後,使用押出機使其熔融混合而得到的樹脂組成物以外,其他皆與實施例1相同,得到的包裝材。 Except for the resin composition (for the film for the inner layer), 100 parts by mass of the above-mentioned "PP1", 0.1 part by mass of silicon dioxide, and 0.1 part by mass of erucylamine were dry-blended using a roller, and then extruded using an extruder. The packaging material obtained was the same as in Example 1 except for the resin composition obtained by the melt-mixing.
<比較例2> <Comparative example 2>
除了樹脂組成物(內側層用薄膜用),是將上述「PP2」100質量份、二氧化矽0.1質量份、芥酸醯胺0.1質量份使用滾筒乾式混合後,使用押出機使其熔融混合而得到的樹脂組成物以外,其他皆與實施例1相同,得到的包裝材。 Except for the resin composition (for the film for the inner layer), 100 parts by mass of the above-mentioned "PP2", 0.1 part by mass of silicon dioxide, and 0.1 part by mass of erucylamine were dry-blended using a roller, and then extruded using an extruder. The packaging material obtained was the same as in Example 1 except for the resin composition obtained by the melt-mixing.
<比較例3> <Comparative example 3>
除了樹脂組成物(內側層用薄膜用),是將上述「PP6」100質量份、二氧化矽0.1質量份、芥酸醯胺0.1質量份使用滾筒乾式混合後,使用押出機使其熔融混合而得到的樹脂組成物以外,其他皆與實施例1相同,得到的包裝材。 Except for the resin composition (for the film for the inner layer), 100 parts by mass of the above-mentioned "PP6", 0.1 part by mass of silicon dioxide, and 0.1 part by mass of erucylamine were dry-blended using a roller, and then extruded using an extruder. The packaging material obtained was the same as in Example 1 except for the resin composition obtained by the melt-mixing.
<實施例9> <Example 9>
將上述「PP3」50質量份、上述「PP2」50質量份、二氧化矽0.1質量份、芥酸醯胺0.1質量份使用滾筒乾式混合後,使用押出機使其熔融混合,得到樹脂組成物A(混合樹脂層31用樹脂組成物)。 50 parts by mass of the "PP3", 50 parts by mass of the "PP2", 0.1 part by mass of silicon dioxide, and 0.1 part by mass of erucamide were mass-mixed using a drum, and then melt-mixed using an extruder to obtain Resin composition A (resin composition for mixed resin layer 31).
然後,將上述「PP7」100質量份、二氧化矽0.1質量份、芥酸醯胺0.1質量份使用滾筒乾式混合後,使用押出機使其熔融混合,得到樹脂組成物B(單一樹脂層32用樹脂組成物)。 Then, 100 parts by mass of the above-mentioned "PP7", 0.1 part by mass of silicon dioxide, and 0.1 part by mass of erucylamine were dry-blended using a roller, and then melt-mixed using an extruder to obtain a resin composition B (single A resin composition is used for the resin layer 32).
接著,使用共押出多層T模成形機將前述樹脂組成物A及前述樹脂組成物B以230℃的樹脂溫度押出,得到厚度30μm的混合樹脂層31與厚度10μm的單一樹脂層32積層而成合計厚度為40μm的內側層用薄膜3。 Next, the resin composition A and the resin composition B were extruded at a resin temperature of 230 ° C. using a co-extrusion multilayer T-die forming machine to obtain a combined resin layer 31 having a thickness of 30 μm and a single resin layer 32 having a thickness of 10 μm. The film 3 for an inner layer having a thickness of 40 μm.
另一方面,於厚度40μm的鋁箔(A8079-O鋁箔)4的兩面,塗佈含有聚丙烯酸(丙烯酸系樹脂)、鉻(III)鹽的化合物、磷酸、水、醇所成化成處理液後,進行150℃乾燥,然後準備兩面形成有化成皮膜的鋁箔。此化成皮膜的鉻附著量,以單面計為5mg/m2。 On the other hand, a 40 μm- thick aluminum foil (A8079-O aluminum foil) 4 was coated with a compound containing polyacrylic acid (acrylic resin), a chromium (III) salt compound, phosphoric acid, water, and an alcohol. Then, it dried at 150 degreeC, and the aluminum foil which formed the chemical-film on both sides was prepared. The amount of chromium deposited on the formed film was 5 mg / m 2 on one side.
接著,於前述兩面形成有化成皮膜的鋁箔4的一側的面,塗佈二液硬化型聚酯聚氨酯樹脂接著劑,使其乾燥後形成第1接著劑層5,在該第1接著劑層5的表面貼合厚度25μm的二軸延伸6-尼龍薄膜(外側層)2,並同時於鋁箔4的另一側的面,塗佈二液硬化型接著劑(以酸變性聚丙烯作為主劑,六亞甲基二異氰酸酯作為硬化劑的二液硬化型接著劑),乾燥後形成第2接著劑層6,將該第2接著劑層6的表面,與上述厚 度40μm的內側層用薄膜3的單一樹脂層32側的面貼合。藉由將此積層體於40℃環境下放置3天(進行保護),可得到圖4所示構成的包裝材1。 Next, a two-liquid curable polyester polyurethane resin adhesive is applied to one side of the aluminum foil 4 on which the chemical conversion film is formed on both sides, and the first adhesive layer 5 is formed after drying, and the first adhesive layer is formed on the first adhesive layer. The surface of 5 is bonded to a biaxially stretched 6-nylon film (outer layer) 2 with a thickness of 25 μm. At the same time, a two-liquid hardening adhesive is applied to the other side of the aluminum foil 4 (with acid-denatured polypropylene as the main agent). Hexamethylene diisocyanate is a two-liquid curing type adhesive with a curing agent), and a second adhesive layer 6 is formed after drying. The surface of the second adhesive layer 6 is as thick as the above. The inner layer with a thickness of 40 μm is bonded to the surface on the single resin layer 32 side of the film 3. By leaving this laminated body in a 40 ° C. environment for 3 days (protecting), a packaging material 1 having a structure shown in FIG. 4 can be obtained.
<實施例10> <Example 10>
除了樹脂組成物A(混合樹脂層31用樹脂組成物),是將上述「PP3」50質量份、上述「PP1」50質量份、二氧化矽0.1質量份、芥酸醯胺0.1質量份使用滾筒乾式混合後,使用押出機使其熔融混合而得到樹脂組成物以外,其他皆與實施例9相同,得到圖4所示構成的包裝材1。 Except for the resin composition A (resin composition for the mixed resin layer 31), 50 parts by mass of the "PP3", 50 parts by mass of the "PP1", 0.1 part by mass of silicon dioxide, and 0.5 g of erucamide 0.1 The mass parts were dry-blended using a drum, and then melt-mixed using an extruder to obtain a resin composition. The rest were the same as in Example 9 to obtain a packaging material 1 having a structure shown in FIG. 4.
<實施例11> <Example 11>
除了樹脂組成物A(混合樹脂層31用樹脂組成物),是將上述「PP4」70質量份、上述「PP1」30質量份、二氧化矽0.1質量份、芥酸醯胺0.1質量份使用滾筒乾式混合後,使用押出機使其熔融混合而得到樹脂組成物以外,其他皆與實施例9相同,得到圖4所示構成的包裝材1。 Except for the resin composition A (resin composition for the mixed resin layer 31), 70 parts by mass of the "PP4", 30 parts by mass of the "PP1", 0.1 part by mass of silicon dioxide, and 1.1 g of erucamide 0.1 The mass parts were dry-blended using a drum, and then melt-mixed using an extruder to obtain a resin composition. The rest were the same as in Example 9 to obtain a packaging material 1 having a structure shown in FIG. 4.
<實施例12> <Example 12>
除了樹脂組成物A(混合樹脂層31用樹脂組成物),是將上述「PP5」50質量份、上述「PP2」50質量份、二氧化矽0.1質量份、芥酸醯胺0.1質量份使用滾筒乾式混合後,使用押出機使其熔融混合而得到樹脂組成物以外,其他皆與實施例9相同,得到圖4所示構成的包裝材1。 Except for the resin composition A (resin composition for the mixed resin layer 31), 50 parts by mass of the "PP5", 50 parts by mass of the "PP2", 0.1 part by mass of silicon dioxide, and 1.1 g of erucylamine The mass parts were dry-blended using a drum, and then melt-mixed using an extruder to obtain a resin composition. The rest were the same as in Example 9 to obtain a packaging material 1 having a structure shown in FIG. 4.
<實施例13> <Example 13>
除了樹脂組成物A(混合樹脂層31用樹脂組成物),是將 上述「PP4」60質量份、上述「PP2」40質量份、二氧化矽0.1質量份、芥酸醯胺0.1質量份使用滾筒乾式混合後,使用押出機使其熔融混合而得到樹脂組成物;同時,樹脂組成物B(單一樹脂層32用樹脂組成物),則是將上述「PP8」100質量份、二氧化矽0.1質量份、芥酸醯胺0.1質量份使用滾筒乾式混合後,使用押出機使其熔融混合而得到樹脂組成物以外,其他皆與實施例9相同,得到圖4所示構成的包裝材1。 In addition to resin composition A (resin composition for mixed resin layer 31), 60 parts by mass of the "PP4", 40 parts by mass of the "PP2", 0.1 part by mass of silicon dioxide, and 0.1 part by mass of erucamide erythramine were dry-blended using a drum, and then melt-mixed using an extruder to obtain a resin. At the same time, the resin composition B (resin composition for a single resin layer 32) uses 100 parts by mass of the aforementioned "PP8", 0.1 part by mass of silicon dioxide, and 0.1 part by mass of erucamide. After the drum was dry-blended, it was melt-mixed using an extruder to obtain a resin composition, and the rest were the same as in Example 9 to obtain a packaging material 1 having a structure shown in FIG. 4.
<實施例14> <Example 14>
除了樹脂組成物A(混合樹脂層31用樹脂組成物),是將上述「PP4」30質量份、上述「PP1」70質量份、二氧化矽0.1質量份、芥酸醯胺0.1質量份使用滾筒乾式混合後,使用押出機使其熔融混合而得到樹脂組成物;同時,樹脂組成物B(單一樹脂層32用樹脂組成物),則是將上述「PP8」100質量份、二氧化矽0.1質量份、芥酸醯胺0.1質量份使用滾筒乾式混合後,使用押出機使其熔融混合而得到樹脂組成物以外,其他皆與實施例9相同,得到圖4所示構成的包裝材1。 Except for the resin composition A (resin composition for the mixed resin layer 31), 30 parts by mass of the "PP4", 70 parts by mass of the "PP1", 0.1 part by mass of silicon dioxide, and 1.1 g of erucylamine After mass-drying using a roller, the resin composition is obtained by melt-mixing using an extruder. Meanwhile, for the resin composition B (resin composition for a single resin layer 32), 100 parts by mass of the above-mentioned "PP8" is used. Silica oxide 0.1 parts by mass and erucamide 1.1 parts by mass were dry-blended using a roller and melt-mixed using an extruder to obtain a resin composition. The rest were the same as in Example 9 to obtain the results shown in FIG. 4组合 的 包装 材 1。 The packaging material 1.
<實施例15> <Example 15>
除了樹脂組成物A(混合樹脂層31用樹脂組成物),是將上述「PP5」80質量份、上述「PP1」20質量份、二氧化矽0.1質量份、芥酸醯胺0.1質量份使用滾筒乾式混合後,使用押出機使其熔融混合而得到樹脂組成物;同時,樹脂組成物B(單一樹脂層32用樹脂組成物),則是將上述「PE3」100質量份、二氧化矽0.1質量份、 芥酸醯胺0.1質量份使用滾筒乾式混合後,使用押出機使其熔融混合而得到樹脂組成物以外,其他皆與實施例9相同,得到圖4所示構成的包裝材1。 Except for the resin composition A (resin composition for the mixed resin layer 31), 80 parts by mass of the "PP5", 20 parts by mass of the "PP1", 0.1 part by mass of silicon dioxide, and 1.1 g of erucamide 0.1 After the mass parts are dry-mixed with a roller, they are melt-mixed using an extruder to obtain a resin composition. Meanwhile, for the resin composition B (resin composition for a single resin layer 32), 100 parts by mass of the above-mentioned "PE3" is used. 0.1 parts by mass of silicon oxide, 0.1 parts by mass of erucylamine was dry-blended using a drum, and melt-mixed using an extruder to obtain a resin composition. The rest were the same as in Example 9 to obtain a packaging material 1 having a structure shown in FIG. 4.
<實施例16> <Example 16>
除了樹脂組成物A(混合樹脂層31用樹脂組成物),是將上述「PE2」70質量份、上述「PE1」30質量份、二氧化矽0.1質量份、芥酸醯胺0.1質量份使用滾筒乾式混合後,使用押出機使其熔融混合而得到樹脂組成物;同時,樹脂組成物B(單一樹脂層32用樹脂組成物),則是將上述「PE3」100質量份、二氧化矽0.1質量份、芥酸醯胺0.1質量份使用滾筒乾式混合後,使用押出機使其熔融混合而得到樹脂組成物以外,其他皆與實施例9相同,得到圖4所示構成的包裝材1。 Except for resin composition A (resin composition for mixed resin layer 31), 70 parts by mass of the above-mentioned "PE2", 30 parts by mass of the above-mentioned "PE1", 0.1 parts by mass of silicon dioxide, and erucamide 1.1 After the mass parts are dry-mixed with a roller, they are melt-mixed using an extruder to obtain a resin composition. Meanwhile, for the resin composition B (resin composition for a single resin layer 32), 100 parts by mass of the above-mentioned "PE3" is used. Silica oxide 0.1 parts by mass and erucamide 1.1 parts by mass were dry-blended using a roller and melt-mixed using an extruder to obtain a resin composition. The rest were the same as in Example 9 to obtain the results shown in FIG. 4组合 的 包装 材 1。 The packaging material 1.
<比較例4> <Comparative Example 4>
除了樹脂組成物A,是將上述「PP1」100質量份、二氧化矽0.1質量份、芥酸醯胺0.1質量份使用滾筒乾式混合後,使用押出機使其熔融混合而得到樹脂組成物以外,其他皆與實施例9相同,得到包裝材。 Except for the resin composition A, 100 parts by mass of the above-mentioned "PP1", 0.1 part by mass of silicon dioxide, and 0.1 part by mass of erucylamine were dry-blended using a drum, and then melt-mixed using an extruder to obtain a resin. Except for the composition, everything was the same as in Example 9 to obtain a packaging material.
<比較例5> <Comparative example 5>
除了樹脂組成物A,是將上述「PP2」100質量份、二氧化矽0.1質量份、芥酸醯胺0.1質量份使用滾筒乾式混合後,使用押出機使其熔融混合而得到樹脂組成物以外,其他皆與實施例9相同,得到包裝材。 Except for the resin composition A, 100 parts by mass of the above-mentioned "PP2", 0.1 part by mass of silicon dioxide, and 0.1 part by mass of erucamide were mass-blended using a drum, and then melt-mixed using an extruder to obtain a resin. Except for the composition, everything was the same as in Example 9 to obtain a packaging material.
<比較例6> <Comparative Example 6>
除了樹脂組成物A,是將上述「PP6」100質量份、二氧化矽0.1質量份、芥酸醯胺0.1質量份使用滾筒乾式混合後,使用押出機使其熔融混合而得到樹脂組成物以外,其他皆與實施例9相同,得到包裝材。 Except for the resin composition A, 100 parts by mass of the above-mentioned "PP6", 0.1 part by mass of silicon dioxide, and 0.1 part by mass of erucamide erythramine were dry-blended using a drum, and then melt-mixed using an extruder to obtain a resin. Except for the composition, everything was the same as in Example 9 to obtain a packaging material.
關於上述所得的各包裝材以下述評估法為基準進行評估,其結果如表1、2所示。 Each packaging material obtained above was evaluated based on the following evaluation method, and the results are shown in Tables 1 and 2.
<密封強度的測定法> <Measurement method of sealing strength>
將包裝材1進行裁切,得到寬15mm×長200mm大小的短冊狀的試驗片2張。使前述2張的試驗片與各內側層3相接觸重合後,於長方向的一側的約一半區域使用熱封機(密封條的寬5mm)以溫度190℃、密封壓0.1MPa的條件下進行熱封。接著,將2張的其中1張試驗片的長方向的其他側的端部區域(無熱封的端部),使用拉伸試驗機的夾頭部夾住後,於130℃氣氛下放置1分鐘,之後,將密封接合的2張試驗片於此130℃環境中,以JIS K7127-1999為基準,藉由最初的夾頭部間距離100mm,拉伸速度300mm/分且180度剝離,測定寬度15mm的熱封強度(N/15mm寬)。以此熱封強度在1.0(N/15mm寬)以上為合格。 The packaging material 1 was cut to obtain two test pieces in the form of a booklet having a width of 15 mm and a length of 200 mm. After the two test pieces mentioned above were brought into contact with each inner layer 3 and overlapped, a heat sealer (a width of the sealing strip 5 mm) was used at a temperature of 190 ° C and a sealing pressure of 0.1 MPa in about half of the area on one side in the longitudinal direction. Under heat seal. Next, one of the two test pieces was placed on the other end region (the end portion without heat seal) in the longitudinal direction of the test piece, and was clamped with a chuck of a tensile tester, and then left in a 130 ° C atmosphere for 1 After 2 minutes, the two test pieces sealed and bonded were measured in this 130 ° C environment based on JIS K7127-1999. The distance between the first chucks was 100 mm, the tensile speed was 300 mm / min, and 180 degrees was peeled off. 15mm width heat seal strength (N / 15mm width). With this, the heat seal strength is above 1.0 (N / 15mm width).
<破裂防止性評估法> <Rupture prevention evaluation method>
對於各實施例及各比較例,準備2張的包裝材,其中1張包裝材1A,藉由深引伸成形使其成形為略直方體形狀(縱35mm×橫55mm×深4mm,有輪緣)的立體形狀,另一張的包裝材1B,不進行成形而保持平面狀,將電池本體部(模擬品)15配置於此等2張的包裝材1A、1B之間後,於該電池本體部15上面滴下1mL的水,接著將2張的包裝材1A、1B的內側層3、3的周緣部彼此使用熱封機(密封條的寬5mm)以溫度190℃、密封壓0.1MPa的條件進行熱封形成電池外殼11,從而得到於電池外殼11的內部空間12封入有電池本體部 15的電池(模擬品)10(參照圖2)。 For each example and each comparative example, two sheets of packaging materials were prepared, one of which was 1A, and was formed into a slightly cuboid shape by deep drawing (35mm in height × 55mm in width × 4mm in depth, with a flange) The three-dimensional shape of the other sheet of packaging material 1B is kept flat without being formed. The battery body portion (simulation) 15 is arranged between these two sheets of packaging material 1A and 1B, and then the battery body portion 15 mL of water was dripped on the top surface, and then the peripheral parts of the inner layers 3 and 3 of the two sheets of packaging materials 1A and 1B were heat-sealed (sealing strip width 5mm) at a temperature of 190 ° C and a sealing pressure of 0.1 MPa The battery case 11 is heat-sealed to obtain an internal space 12 of the battery case 11 and a battery body portion is sealed. 15 batteries (analog) 10 (see FIG. 2).
將所得電池(模擬品)配置於150℃的烘箱內,並在該狀態下放置最長6分鐘,以目視觀察放入烘箱內至氣體洩漏或破裂的情況,以下述判定基準進行評估。 The obtained battery (simulated product) was placed in an oven at 150 ° C., and was left in this state for a maximum of 6 minutes. The situation of gas leakage or cracking in the oven was visually observed, and evaluation was performed based on the following judgment criteria.
(判定基準) (Judgment criteria)
「○」...放入烘箱內後經過1分~2分時,如圖3所示於內側層3產生貫通排氣路21,並同時於內側層3與鋁箔層4之間產生剝離間隙22,電池外殼11內的氣體可向外部洩漏,並防止因內壓上升而破裂。 "○" ... When 1 minute to 2 minutes passes after being placed in the oven, as shown in FIG. 3, a through-exhaust passage 21 is generated in the inner layer 3, and a peeling gap is generated between the inner layer 3 and the aluminum foil layer 4 at the same time. 22. The gas in the battery case 11 can leak to the outside and prevent it from being broken due to an increase in internal pressure.
「×」...放入烘箱內後經過4分~5分時爆發破裂。 "×" ... After being placed in the oven, 4 to 5 minutes erupted and burst.
「××」...放入烘箱內後經過6分後亦無破裂(此時當內壓更為上升則會爆發破裂)。 "××" ... There is no rupture after 6 minutes after being placed in the oven (at this time, the internal pressure will rise and rupture).
如表1、2所明白顯示者,本發明的實施例1~16的包裝材,可得到大小適當的熱封強度,確保充分的密封性。此外,使用本發明的實施例1~16的包裝材所外裝的電池,當電池外殼的內壓過度上升且同時電池外殼的溫度過度上升時,電池外殼內的氣體可向外部洩漏(內部的氣體可安全向外部洩漏),從而防止內壓的過度上升導致電池外殼的破壞。 As clearly shown in Tables 1 and 2, the packaging materials according to Examples 1 to 16 of the present invention can obtain heat sealing strength of an appropriate size and ensure sufficient sealing properties. In addition, when the battery enclosed in the packaging materials of Examples 1 to 16 of the present invention is used, when the internal pressure of the battery case is excessively increased and the temperature of the battery case is excessively increased, the gas in the battery case may leak to the outside (internal The gas can be leaked to the outside safely) to prevent the battery case from being damaged due to the excessive rise of the internal pressure.
相對於此,使用偏離本發明的申請專利範圍第1項範圍的比較例1、4的包裝材所外裝的電池,經過6分鐘後雖不會破裂,但之後內壓更進一步上升時將會爆發破裂。此外,使用偏離本發明的申請專利範圍第1項範圍的比較例2、5的包裝材所外裝的電池,是因高溫而使熱封強度過大,因此當電池外殼的內壓過度上升且同時電池外殼的溫度過度上升 時,電池外殼將會爆發破裂。 On the other hand, the batteries packed in the packaging materials of Comparative Examples 1 and 4 that deviate from the scope of the first patent application scope of the present invention will not crack after 6 minutes, but the internal pressure will increase when the internal pressure further rises. The burst broke. In addition, the batteries enclosed in the packaging materials of Comparative Examples 2 and 5 that deviate from the scope of the first scope of the patent application of the present invention have excessive heat seal strength due to high temperature. Therefore, when the internal pressure of the battery case is excessively increased and at the same time, Battery case temperature rises excessively The battery case will burst and burst.
此外,偏離本發明的申請專利範圍第1項範圍的比較例3、6的包裝材,是以130℃而使熱封強度較1.0(N/15mm寬)為小,因此無法得到充分的熱封強度。 In addition, the packaging materials of Comparative Examples 3 and 6 which deviated from the scope of the first scope of the patent application of the present invention have a heat seal strength of less than 1.0 (N / 15mm width) at 130 ° C, so they cannot be sufficiently obtained. Heat seal strength.
又,使用實施例1的包裝材所外裝的電池,以電子顯微鏡觀察破裂防止性評估後的狀態時(電池外殼的內壓過度上升且氣體洩漏後的狀態),如圖3所示,各內側層3彼此的密封部與鋁箔層4之間產生有剝離間隙22,同時形成有貫通內側層3(各內側層的密封部)的略厚方向,並與該剝離間隙22連通的貫通排氣路21。 In addition, when the state of the battery (the state after the internal pressure of the battery case was excessively increased and the gas was leaked) was observed with an electron microscope using the battery mounted on the packaging material of Example 1 with an electron microscope, each A peeling gap 22 is generated between the sealing portions of the inner layers 3 and the aluminum foil layer 4, and a slightly thick direction penetrating through the inner layer 3 (the sealing portion of each inner layer) is formed, and a penetrating exhaust gas communicating with the peeling gap 22 is formed. Road 21.
本發明的包裝材,可使用作為蓄電池(鋰離子蓄電池等)等的電池用外裝材,但並不特別限定於此用途。其中,本發明的包裝材於內壓及溫度過度上升時,所產生的氣體可洩漏從而防止因內壓上升導致包裝材(已熱封的包裝材)的破裂,因此可較佳使用作為手機用電池的外裝材、汽車用電池的外裝材。 The packaging material of the present invention can be used as a battery exterior material such as a storage battery (such as a lithium ion storage battery), but it is not particularly limited to this application. Among them, when the internal pressure and temperature of the packaging material of the present invention rise excessively, the generated gas can leak to prevent the packaging material (heat-sealed packaging material) from rupturing due to the increase in internal pressure, so it can be used as a mobile phone. Exterior materials for batteries, exterior materials for automotive batteries.
本發明的電池,可使用作為蓄電池(鋰離子蓄電池等)等的電池。其中,本發明的包裝材於內壓及溫度過度上升時,所產生的氣體可洩漏從而防止因內壓上升導致電池外殼(由2張的包裝材熱封接合所形成者)的破裂,因此可較佳使用作為手機用電池、汽車用電池。 The battery of the present invention can be used as a battery such as a storage battery (such as a lithium ion storage battery). Among them, when the internal pressure and temperature of the packaging material of the present invention are excessively increased, the generated gas can leak to prevent the battery case (which is formed by heat-sealing and bonding two packaging materials) from rupturing due to the increase of the internal pressure. It is preferably used as a battery for mobile phones and a battery for automobiles.
本申請案,是伴隨著在2014年3月14日提出申請的日本專利申請案特願2014-52184號的優先權主張,其揭示內容直 接構成本申請案的一部分。 This application is accompanied by the priority claim of Japanese Patent Application No. 2014-52184 filed on March 14, 2014. It then forms part of this application.
在此所使用的用語及說明,是用以說明本發明的實施型態而使用,本發明並不限定於此。在本發明所揭示且敘述的特徵事項的任何均等物皆不應被排除,且在本發明所請求的範圍內的各種變形亦應被理解為是可被接受的。 The terms and descriptions used herein are used to explain the embodiments of the present invention, and the present invention is not limited thereto. Any equivalents in the characteristic matters disclosed and described in the present invention should not be excluded, and various modifications within the scope claimed by the present invention should also be understood as acceptable.
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