CN109546016A - Packaging film for electrochemical cell and preparation method thereof - Google Patents
Packaging film for electrochemical cell and preparation method thereof Download PDFInfo
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- CN109546016A CN109546016A CN201811281933.7A CN201811281933A CN109546016A CN 109546016 A CN109546016 A CN 109546016A CN 201811281933 A CN201811281933 A CN 201811281933A CN 109546016 A CN109546016 A CN 109546016A
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- packaging film
- film
- organic pigment
- electrochemical cell
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- 229920006280 packaging film Polymers 0.000 title claims abstract description 89
- 239000012785 packaging film Substances 0.000 title claims abstract description 89
- 238000002360 preparation method Methods 0.000 title abstract description 14
- 239000010410 layer Substances 0.000 claims abstract description 179
- 239000012860 organic pigment Substances 0.000 claims abstract description 61
- 229910052751 metal Inorganic materials 0.000 claims abstract description 54
- 239000002184 metal Substances 0.000 claims abstract description 54
- 238000000576 coating method Methods 0.000 claims abstract description 52
- 239000011248 coating agent Substances 0.000 claims abstract description 47
- 229920000642 polymer Polymers 0.000 claims abstract description 45
- 239000012790 adhesive layer Substances 0.000 claims abstract description 42
- 239000011241 protective layer Substances 0.000 claims abstract description 29
- 239000012793 heat-sealing layer Substances 0.000 claims abstract description 10
- 239000002994 raw material Substances 0.000 claims abstract description 5
- 239000004743 Polypropylene Substances 0.000 claims description 46
- -1 polypropylene Polymers 0.000 claims description 46
- 229920001155 polypropylene Polymers 0.000 claims description 46
- 239000012943 hotmelt Substances 0.000 claims description 37
- 239000011247 coating layer Substances 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 19
- 229910052782 aluminium Inorganic materials 0.000 claims description 15
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 15
- 239000000203 mixture Substances 0.000 claims description 15
- 229920005989 resin Polymers 0.000 claims description 14
- 239000011347 resin Substances 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 13
- 238000007756 gravure coating Methods 0.000 claims description 12
- 239000003822 epoxy resin Substances 0.000 claims description 11
- 239000005011 phenolic resin Substances 0.000 claims description 11
- 229920001568 phenolic resin Polymers 0.000 claims description 11
- 229920000647 polyepoxide Polymers 0.000 claims description 11
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 10
- 239000011888 foil Substances 0.000 claims description 9
- 229920005749 polyurethane resin Polymers 0.000 claims description 9
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 8
- 239000004925 Acrylic resin Substances 0.000 claims description 8
- 229920000178 Acrylic resin Polymers 0.000 claims description 8
- 239000000049 pigment Substances 0.000 claims description 8
- 238000010030 laminating Methods 0.000 claims description 7
- 238000003475 lamination Methods 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 7
- KEZYHIPQRGTUDU-UHFFFAOYSA-N 2-[dithiocarboxy(methyl)amino]acetic acid Chemical compound SC(=S)N(C)CC(O)=O KEZYHIPQRGTUDU-UHFFFAOYSA-N 0.000 claims description 6
- FQENQNTWSFEDLI-UHFFFAOYSA-J sodium diphosphate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-]P([O-])(=O)OP([O-])([O-])=O FQENQNTWSFEDLI-UHFFFAOYSA-J 0.000 claims description 6
- 235000019818 tetrasodium diphosphate Nutrition 0.000 claims description 6
- 241000598860 Garcinia hanburyi Species 0.000 claims description 5
- RGCKGOZRHPZPFP-UHFFFAOYSA-N alizarin Chemical compound C1=CC=C2C(=O)C3=C(O)C(O)=CC=C3C(=O)C2=C1 RGCKGOZRHPZPFP-UHFFFAOYSA-N 0.000 claims description 5
- 229940117709 gamboge Drugs 0.000 claims description 5
- 229920000058 polyacrylate Polymers 0.000 claims description 5
- ANRHNWWPFJCPAZ-UHFFFAOYSA-M thionine Chemical compound [Cl-].C1=CC(N)=CC2=[S+]C3=CC(N)=CC=C3N=C21 ANRHNWWPFJCPAZ-UHFFFAOYSA-M 0.000 claims description 5
- IEQIEDJGQAUEQZ-UHFFFAOYSA-N phthalocyanine Chemical compound N1C(N=C2C3=CC=CC=C3C(N=C3C4=CC=CC=C4C(=N4)N3)=N2)=C(C=CC=C2)C2=C1N=C1C2=CC=CC=C2C4=N1 IEQIEDJGQAUEQZ-UHFFFAOYSA-N 0.000 claims description 4
- 229920000728 polyester Polymers 0.000 claims description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229920000181 Ethylene propylene rubber Polymers 0.000 claims description 3
- 229920001328 Polyvinylidene chloride Polymers 0.000 claims description 3
- 239000011889 copper foil Substances 0.000 claims description 3
- 238000003618 dip coating Methods 0.000 claims description 3
- 239000005038 ethylene vinyl acetate Substances 0.000 claims description 3
- 229920002313 fluoropolymer Polymers 0.000 claims description 3
- 239000004811 fluoropolymer Substances 0.000 claims description 3
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 claims description 3
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims description 3
- 229920006122 polyamide resin Polymers 0.000 claims description 3
- 229920005990 polystyrene resin Polymers 0.000 claims description 3
- 239000005033 polyvinylidene chloride Substances 0.000 claims description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 2
- 238000003860 storage Methods 0.000 abstract description 5
- 241001465754 Metazoa Species 0.000 abstract description 3
- 230000004069 differentiation Effects 0.000 abstract 1
- 229920006233 biaxially oriented polyamide Polymers 0.000 description 43
- 239000007788 liquid Substances 0.000 description 20
- 229920002647 polyamide Polymers 0.000 description 20
- 239000004952 Polyamide Substances 0.000 description 19
- 229920006149 polyester-amide block copolymer Polymers 0.000 description 19
- 239000000126 substance Substances 0.000 description 10
- 238000001035 drying Methods 0.000 description 7
- 238000009776 industrial production Methods 0.000 description 7
- 229920001187 thermosetting polymer Polymers 0.000 description 6
- 239000000853 adhesive Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- WJZHMLNIAZSFDO-UHFFFAOYSA-N manganese zinc Chemical compound [Mn].[Zn] WJZHMLNIAZSFDO-UHFFFAOYSA-N 0.000 description 5
- 239000002344 surface layer Substances 0.000 description 5
- 239000002253 acid Substances 0.000 description 4
- 239000004753 textile Substances 0.000 description 4
- 241000196324 Embryophyta Species 0.000 description 2
- KLARSDUHONHPRF-UHFFFAOYSA-N [Li].[Mn] Chemical compound [Li].[Mn] KLARSDUHONHPRF-UHFFFAOYSA-N 0.000 description 2
- 239000011149 active material Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 239000002174 Styrene-butadiene Substances 0.000 description 1
- BPKGOZPBGXJDEP-UHFFFAOYSA-N [C].[Zn] Chemical compound [C].[Zn] BPKGOZPBGXJDEP-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 229920006397 acrylic thermoplastic Polymers 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 description 1
- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000004595 color masterbatch Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- BSWGGJHLVUUXTL-UHFFFAOYSA-N silver zinc Chemical compound [Zn].[Ag] BSWGGJHLVUUXTL-UHFFFAOYSA-N 0.000 description 1
- 239000011115 styrene butadiene Substances 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- ISXSCDLOGDJUNJ-UHFFFAOYSA-N tert-butyl prop-2-enoate Chemical compound CC(C)(C)OC(=O)C=C ISXSCDLOGDJUNJ-UHFFFAOYSA-N 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Laminated Bodies (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The invention provides a packaging film for an electrochemical cell and a preparation method thereof, wherein the packaging film sequentially comprises the following components: the protective layer added with organic pigment, the metal layer and the heat sealing layer sequentially comprises a polymer coating, a film layer and an adhesive layer from outside to inside. The organic pigment is added into the protective layer, the stacking strength between the protective layer and the metal layer can be enhanced by the protective layer added with the organic pigment, the peeling strength and the deep drawing forming performance of the packaging film are improved, the normal use of the electrochemical cell is ensured, in addition, the monotonous metal color of the existing packaging film can be changed by adding the organic pigment, the appearance differentiation of the packaging film is realized, the identification and storage management are facilitated, finally, the raw material of the organic pigment is derived from natural animals and plants, the natural environment-friendly characteristic is realized, and the packaging film for the electrochemical cell added with the organic pigment is more environment-friendly.
Description
Technical Field
The invention relates to the technical field of electrochemical cell packaging materials, in particular to a packaging film for an electrochemical cell and a preparation method thereof.
Background
After the 21 st century, various electronic device products such as mobile phones, notebooks, wearable devices and the like are in endless, and the lives of the users are greatly enriched; simultaneously, electric automobile and all kinds of energy storage power stations also sprout, develop, grow rapidly like spring bamboo shoots after the rain, and above high-tech product has a common characteristic: high performance, low cost batteries are required to serve as energy storage components.
An electrochemical cell is a device that is capable of providing electrical energy through an electrochemical reaction, typically between two or more reactants. In general, an electrochemical cell includes two electrodes, referred to as an anode and a cathode, and an electrolyte disposed between the electrodes. In order to prevent direct reaction of the active material of the anode and the active material of the cathode, the electrodes are electrically separated from each other by a separator. The existing electrochemical cells are mainly divided into two types, namely primary cells and secondary cells, so-called primary cells, i.e. cells which cannot be repeatedly charged, and mainly comprise carbon zinc cells, alkaline cells, paste zinc-manganese cells, cardboard zinc-manganese cells, alkaline zinc-manganese cells, button cells (button zinc-silver cells, button lithium-manganese cells, button zinc-manganese cells), zinc-air cells, primary lithium-manganese cells, mercury cells and the like; the secondary battery, i.e., a rechargeable battery, mainly includes a secondary alkaline zinc-manganese battery, a nickel-cadmium rechargeable battery, a nickel-hydrogen rechargeable battery, a lithium rechargeable battery, a lead-acid battery, a solar battery, and the like. Lead-acid batteries can be divided into: open type lead-acid storage battery and totally-enclosed lead-acid storage battery. From the perspective of external packaging, the conventional batteries are mainly classified into flexible-packaged batteries and hard-shell-packaged batteries, and the flexible-packaged battery packaging film has small thickness and large plasticity, so that the battery is widely applied to various high-grade primary batteries and secondary batteries.
The current commonly used packaging film for the electrochemical cell is a composite laminated film, but the interlayer strength of the composite film is poor, so that the peeling strength and deep drawing forming performance of the packaging film for the electrochemical cell are reduced, and the normal use is influenced; in addition, the conventional packaging films for electrochemical cells have no color, and the appearance looks monotonous and metallic, so that the single appearance is inconvenient for identification and storage management.
Disclosure of Invention
In view of the above-mentioned disadvantages of the prior art, an object of the present invention is to provide a packaging film for electrochemical cells and a method for manufacturing the same, which are used to solve the problems that the prior packaging film for electrochemical cells has low peel strength and deep drawing property, which affect the normal use of the cells, and the prior packaging film for electrochemical cells has no color, has a monotonous metal color in appearance, and is not easy to identify and store and manage.
To achieve the above and other related objects, the present invention provides a packaging film for an electrochemical cell, comprising:
a metal layer;
the heat sealing layer is arranged on one side of the metal layer;
the protective layer added with the organic pigment is arranged on the other side of the metal layer;
the protective layer sequentially comprises a polymer coating, a film layer and an adhesive layer.
Optionally, the raw material for preparing the organic pigment comprises one or more of a composition of natural cyanine, gamboge and alizarin red.
Optionally, at least one of the polymer coating layer, the film layer and the adhesive layer is added with the organic pigment.
Optionally, an ink layer is included between the film layer and the adhesive layer, and at least the organic pigment is added in the ink layer.
Further, the material of the ink layer comprises one or more of the group consisting of acrylic resin, epoxy resin, polyurethane resin and phenolic resin.
Optionally, the material of the polymeric coating comprises a composition of one or more of the group consisting of tetrasodium pyrophosphate, sodium metasilicate pentahydrate, polyalkyl ethers, polyester acrylics, and fluoropolymers.
Optionally, the material of the adhesive layer includes one or more of the group consisting of urethane resins, epoxy resins, acrylate resins, polystyrene resins, phenolic resins, polyacrylic resins, and ethylene-vinyl acetate copolymer resins.
Optionally, the organic pigment comprises at least one of an azo pigment and a phthalocyanine pigment.
Optionally, the metal layer comprises an aluminum foil layer or a copper foil layer.
Optionally, the material of the heat-seal layer comprises a hot-melt polypropylene.
Further, the hot melt polypropylene includes a composition of one or more selected from the group consisting of polypropylene resin, polyamide resin, ethylene propylene rubber, polyacrylate, and polyvinylidene chloride.
The present invention also provides a method for preparing a packaging film for an electrochemical cell, the method comprising:
laminating a protective layer added with organic pigment and one side of the metal layer, wherein the protective layer comprises a polymer coating, a film layer and an adhesive layer which are sequentially adhered;
2) And laminating a heat sealing layer with the other side of the metal layer.
Alternatively, in the lamination step, lamination is performed using a dry coating method, a thermal method, a dry method, or a thermal bonding method.
Optionally, the method of bonding the polymer coating to the film layer includes dip coating, gravure coating, or five-roll reverse.
Optionally, the polymeric coating is applied at a weight of 1 to 4 grams per square meter and the adhesive layer is applied at a weight of 2 to 6 grams per square meter.
The present invention also provides an electrochemical cell comprising the packaging film for an electrochemical cell described in any one of the above.
As described above, the packaging film for electrochemical cells according to the present invention has the following advantageous effects: the packaging film for the electrochemical cell is characterized in that the organic pigment is added into the protective layer, the stacking strength between the protective layer and the metal layer can be enhanced by the protective layer added with the organic pigment, so that the peeling strength and the deep drawing forming performance of the packaging film are improved, the normal use of the electrochemical cell is ensured, in addition, the monotonous metal color of the existing packaging film can be changed by adding the organic pigment, the appearance difference of the packaging film is realized, the identification and the storage management are facilitated, and finally, the raw material of the organic pigment is derived from natural animals and plants and has natural environmental protection characteristics, so that the packaging film for the electrochemical cell added with the organic pigment is more environment-friendly.
Drawings
Fig. 1 is a schematic view showing the structures of examples 1 to 4 of the packaging film for electrochemical cells of the present invention.
Fig. 2 is a schematic view showing the structures of examples 5 to 6 of the packaging film for electrochemical cells of the present invention.
Fig. 3 is a schematic flow chart showing a method for manufacturing a packaging film for an electrochemical cell according to the present invention.
Description of the element reference numerals
1. Metal layer
2. Heat-sealing layer
3. Protective layer
31. Polymer coatings
32. Film layer
33. Adhesive layer
34. Printing ink layer
S1 to S2
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
Please refer to fig. 1 to 3. It should be noted that the drawings provided in the present embodiment are only for illustrating the basic idea of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated.
As shown in fig. 1, the present invention provides a packaging film for an electrochemical cell, comprising:
a metal layer 1;
the heat sealing layer 2 is arranged on one side of the metal layer 1;
a protective layer 3 added with organic pigment and arranged on the other side of the metal layer 2;
the protective layer 3, the metal layer 1 and the heat sealing layer 2 are compounded together;
the protective layer 3 comprises a polymer coating 31, a film layer 32 and an adhesive layer 33 from outside to inside in sequence. It should be noted here that the protective layer 3 has high heat resistance, abrasion resistance and flexibility as an outer layer protection of the packaging film.
According to the packaging film for the electrochemical cell, the organic pigment is added in the protective layer 3, the protective layer added with the organic pigment can enhance the laminating strength between the protective layer and the metal layer, so that the peeling strength and deep drawing forming performance of the packaging film are improved, and the normal use of the electrochemical cell is ensured.
The material of the film layer 32 includes, for example, polyester or polyamide.
Preferably, the raw materials for preparing the organic pigment include a composition of one or more of the group consisting of natural cyanine, gamboge, alizarin red. The natural cyanine, the gamboge and the alizarin red are derived from natural animals and plants and have natural environmental protection characteristics, so that the packaging film for the electrochemical cell, which is added with the organic pigment, is more environment-friendly.
Illustratively, the organic pigment includes at least one of an azo pigment and a phthalocyanine pigment. Preferably, the azo pigment and the phthalocyanine pigment are synthesized from natural cyanine, gamboge and alizarin red.
Illustratively, the organic pigment is added to at least one of the polymer coating layer 31, the film layer 32, and the adhesive layer 33.
Preferably, an ink layer 34 is included between the film layer 32 and the adhesive layer 33, and at least the organic pigment is added to the ink layer 34. The adhesion strength between the film layer 32 and the adhesive layer 33 can be further enhanced by the ink layer 34. More preferably, the material of the ink layer 34 includes a combination of one or more of the group consisting of acrylic resin, epoxy resin, polyurethane resin and phenolic resin.
By way of example, the material of the polymer coating 31 includes a composition of one or more of the group consisting of tetrasodium pyrophosphate, sodium metasilicate pentahydrate, polyalkyl ether, polyester acrylic, and fluoropolymer.
As an example, the material of the adhesive layer 33 includes one or more of the group consisting of urethane resins, epoxy resins, acrylate resins, polystyrene resins, phenolic resins, polyacrylic resins, and ethylene-vinyl acetate copolymer resins.
The metal layer 1 includes an aluminum foil layer or a copper foil layer, as an example.
As an example, the material of the heat seal layer 2 includes hot melt type polypropylene. Preferably, the hot melt polypropylene includes a composition of one or more selected from the group consisting of polypropylene resin, polyamide resin, ethylene propylene rubber, polyacrylate, and polyvinylidene chloride.
As shown in fig. 1 and fig. 3, the present invention further provides a method for preparing a packaging film for an electrochemical cell, by which the packaging film for an electrochemical cell can be prepared, and the properties and parameters of the packaging film for an electrochemical cell prepared by the preparation method refer to the foregoing examples, which are not repeated herein, and only the preparation method is described. The preparation method comprises the following steps:
s1, laminating a protective layer 3 added with an organic pigment and the outer side of a metal layer 1, wherein the protective layer 3 comprises polymer coatings 31 and 32 and an adhesive layer 33 which are sequentially adhered from outside to inside;
and S2, laminating the heat sealing layer 2 and the inner side of the metal layer 1.
As an example, the lamination method in step S1 includes a dry coating method; the lamination method in step S2 includes a thermal method, a dry method, or a thermal bonding method.
Illustratively, the polymer coating layer 31 is coated on the outer side of the polyester-based or polyamide-based film layer 32 by dip coating, gravure coating, or five-roll reverse.
Preferably, the polymer coating layer 31 is applied at a weight of 1 to 4 grams per square meter and the adhesive layer 33 is applied at a weight of 2 to 6 grams per square meter.
Preferably, when the ink layer 34 is included between the film layer 32 and the adhesive layer 33, the coating amount of the ink layer 34 is 0.5 g/m to 3 g/m.
The present invention also provides an electrochemical cell comprising the packaging film for an electrochemical cell according to any one of the above aspects.
The packaging film for electrochemical cells and the method for producing the same according to the present invention will be further described with reference to the following examples.
Example 1
As shown in fig. 1, the packaging film for electrochemical cells according to the present example comprises, in order from the outside to the inside: a polymer coating 31 added with organic pigment, a transparent high temperature resistant polyester or polyamide film layer 32, a transparent high temperature resistant adhesive layer 33, a metal layer 1 and a transparent hot melt polypropylene film layer 2. Wherein, the polymer coating 31 is a color layer, and the high temperature resistant polyester or polyamide film layer 32, the high temperature resistant adhesive layer 33 and the hot melt polypropylene film layer 2 are transparent layers.
The high temperature resistant polyester or polyamide film layer 32 is, for example, 25um thick biaxially oriented polyamide film (BOPA) of japan xinnah company, the metal layer 1 is 40um thick O-state soft aluminum foil of japan dongyang aluminum, the hot melt polypropylene film 2 is 40um thick hot melt polypropylene film, or polypropylene film produced by commercially available japan dongyo film processing corporation, the high temperature resistant adhesive layer 33 is a two-component high temperature resistant thermosetting film of a film for an electrochemical cell of japan dongyo textile company, and has a coating amount of about 4 g per square meter, and the polymer coating layer 31 is a halogen-free chemical treatment liquid of shanka morse limited, and has a coating amount of about 2.5 g per square meter.
The polymer coating 31 added with the organic pigment is formed by coating a chemical mixture liquid of tetrasodium pyrophosphate, sodium metasilicate pentahydrate, polyalkyl ether and a nano organic pigment with a color layer on the outer surface layer of a transparent Biaxially Oriented Polyamide (BOPA) film 32 in a gravure coating mode, coating a high-temperature-resistant adhesive layer 33 on the inner layer of the colored Biaxially Oriented Polyamide (BOPA) film 32 and adhering the colored biaxially oriented polyamide film to one surface of the metal layer 1 by using a dry process, and adhering the hot-melt polypropylene film 2 to the other surface of the metal layer 1.
The resulting packaging film for electrochemical cells was colored in appearance. The prepared packaging film is subjected to peel strength and forming depth tests, so that various performance requirements of the packaging film for the electrochemical cell are met, and the packaging film is simple in preparation process and convenient for industrial production.
Example 2
As shown in fig. 1, the packaging film for electrochemical cells according to the present example comprises, in order from the outside to the inside: a polymer coating layer 31, a high temperature resistant polyester or polyamide film layer 32 with organic pigment, a transparent high temperature resistant adhesive layer 33, a metal layer 1 and a transparent hot melt polypropylene film layer 2. Wherein, the high temperature resistant polyester or polyamide film layer 32 added with organic pigment is a color layer, and the polymer coating layer 31, the high temperature resistant adhesive layer 33 and the hot melt polypropylene film layer 2 are transparent layers.
The high temperature resistant polyester or polyamide film layer 32 is, for example, 25um thick biaxially oriented polyamide film (BOPA) of japan xinnah company, the metal layer 1 is 40um thick O-state soft aluminum foil of japan dongyang aluminum, the hot melt polypropylene film 2 is 40um thick hot melt polypropylene film, or polypropylene film produced by commercially available japan dongyo film processing corporation, the high temperature resistant adhesive layer 33 is a two-component high temperature resistant thermosetting film of a film for an electrochemical cell of japan dongyo textile company, and has a coating amount of about 4 g per square meter, and the polymer coating layer 31 is a halogen-free chemical treatment liquid of shanka morse limited, and has a coating amount of about 2.5 g per square meter.
The biaxially oriented polyamide film (BOPA) 32 added with the organic pigment can be a multilayer co-extruded colored film formed by a mixed material containing maleic anhydride resin, styrene-butadiene transparent impact-resistant resin and organic pigment color master batches, the polymer coating 31 is formed by coating a chemical mixture liquid in a gravure manner and forming a protective layer with the outer surface layer of the biaxially oriented polyamide film (BOPA) layer 32 added with the organic pigment, the inner layer of the colored biaxially oriented polyamide film (BOPA) layer 32 is coated with a high-temperature-resistant bonding layer 33 and is bonded with one surface of the metal layer 1 by using a dry process, and the hot-melt type polypropylene film 2 is bonded with the other surface of the metal layer 1.
The resulting packaging film for electrochemical cells was colored in appearance. The prepared packaging film is subjected to peel strength and forming depth tests, so that various performance requirements of the packaging film for the electrochemical cell are met, and the packaging film is simple in preparation process and convenient for industrial production.
Example 3
As shown in fig. 1, the packaging film for electrochemical cells according to the present example comprises, in order from the outside to the inside: a polymer coating layer 31, a transparent high temperature resistant polyester or polyamide film layer 32, a high temperature resistant adhesive layer 33 added with organic pigment, a metal layer 1 and a transparent hot melt polypropylene film layer 2. Wherein, the high temperature resistant adhesive layer 33 is a color layer, and the polymer coating 31, the high temperature resistant polyester or polyamide film layer 32 and the hot melt polypropylene film layer 2 are transparent layers.
The high temperature resistant polyester or polyamide film layer 32 is, for example, 25um thick biaxially oriented polyamide film (BOPA) of japan xinnah company, the metal layer 1 is 40um thick O-state soft aluminum foil of japan dongyang aluminum, the hot melt polypropylene film 2 is 40um thick hot melt polypropylene film, or polypropylene film produced by commercially available japan dongyo film processing corporation, the high temperature resistant adhesive layer 33 is a two-component high temperature resistant thermosetting film of a film for an electrochemical cell of japan dongyo textile company, and has a coating amount of about 4 g per square meter, and the polymer coating layer 31 is a halogen-free chemical treatment liquid of shanka morse limited, and has a coating amount of about 2.5 g per square meter.
The high-temperature resistant adhesive layer 33 added with the organic pigment is a high-temperature resistant adhesive liquid of acrylic resin, epoxy resin, polyurethane resin, phenolic resin and nano-scale organic pigment. The polymer coating layer 31 is a polymer liquid, which is coated on the outer side of the transparent biaxially oriented polyamide film (BOPA) layer 32 by a gravure coating method, the inner layer of the biaxially oriented polyamide film (BOPA) layer 32 is coated with a liquid of a high temperature resistant adhesive layer 33 added with an organic pigment, and is adhered to one surface of the metal layer 1 by a dry process, and the hot melt type polypropylene film 2 is adhered to the other surface of the metal layer 1.
The resulting packaging film for electrochemical cells was colored in appearance. The prepared packaging film is subjected to peel strength and forming depth tests, so that various performance requirements of the packaging film for the electrochemical cell are met, and the packaging film is simple in preparation process and convenient for industrial production.
Example 4
As shown in fig. 1, the packaging film for electrochemical cells according to the present embodiment sequentially includes, from the outside to the inside: a polymer coating layer 31 added with organic pigment, a transparent high temperature resistant polyester or polyamide film layer 32, a high temperature resistant adhesive layer 33 added with organic pigment, a metal layer 1 and a transparent hot melt polypropylene film layer 2. Wherein, the polymer coating 31 and the high temperature resistant adhesive layer 33 are color layers, and the high temperature resistant polyester or polyamide film layer 32 and the hot melt polypropylene film layer 2 are transparent layers.
The high temperature resistant polyester or polyamide film layer 32 is, for example, 25um thick biaxially oriented polyamide film (BOPA) of japan xinnah company, the metal layer 1 is 40um thick O-state soft aluminum foil of japan dongyang aluminum, the hot melt polypropylene film 2 is 40um thick hot melt polypropylene film, or polypropylene film produced by commercially available japan dongyo film processing corporation, the high temperature resistant adhesive layer 33 is a two-component high temperature resistant thermosetting film of a film for an electrochemical cell of japan dongyo textile company, and has a coating amount of about 4 g per square meter, and the polymer coating layer 31 is a halogen-free chemical treatment liquid of shanka morse limited, and has a coating amount of about 2.5 g per square meter.
The polymer coating 31 added with the organic pigment is formed by coating a chemical mixture liquid of tetrasodium pyrophosphate, sodium metasilicate pentahydrate, polyalkyl ether and a nano organic pigment with a color layer on the outer surface layer of a transparent biaxially oriented polyamide film (BOPA) layer 32 in a gravure coating mode, coating a high-temperature resistant adhesive liquid formed by acrylic resin, epoxy resin, polyurethane resin, phenolic resin and the nano organic pigment on the inner layer of the colored biaxially oriented polyamide film (BOPA) layer 32, bonding the high-temperature resistant adhesive liquid with one surface of the metal layer 1 by using a dry process, and bonding the hot-melt polypropylene film 2 with the other surface of the metal layer 1.
The resulting packaging film for electrochemical cells was colored in appearance. The prepared packaging film is subjected to peel strength and forming depth tests, so that various performance requirements of the packaging film for the electrochemical cell are met, and the packaging film is simple in preparation process and convenient for industrial production.
Example 5
As shown in fig. 2, the packaging film for electrochemical cells according to the present embodiment sequentially includes, from the outside to the inside: a polymer coating 31, a transparent high temperature resistant polyester or polyamide film layer 32, an ink layer 34 added with organic pigment, a transparent high temperature resistant adhesive layer 33, a metal layer 1 and a transparent hot melt polypropylene film layer 2. The ink layer 34 is a color layer, and the polymer coating layer 31, the high temperature resistant polyester or polyamide film layer 32, the high temperature resistant adhesive layer 33 and the hot-melt polypropylene film layer 2 are transparent layers.
The high temperature resistant polyester or polyamide film layer 32 is, for example, 25um thick biaxially oriented polyamide film (BOPA) of japan xinnah company, the metal layer 1 is 40um thick O-state soft aluminum foil of japan dongyang aluminum industry, the hot melt polypropylene film 2 is 40um thick hot melt polypropylene film, or polypropylene film produced by japan dongyi film processing corporation, the ink layer is a halogen-free colored ink of japan electronics corporation, and has a coating amount of about 1.75 g/m, the high temperature resistant adhesive layer 33 is a two-component high temperature resistant thermosetting adhesive of a film for electrochemical cells of japan dongyang company, and has a coating amount of about 4 g/m, and the polymer coating layer 31 is a halogen-free chemical treatment liquid of shanghaca garlica limited, and has a coating amount of about 2.5 g/m.
The ink layer 34 added with the organic pigment is a mixture liquid formed by acrylic resin, epoxy resin, polyurethane resin, phenolic resin and nano organic pigment, a color layer is formed on the inner surface layer of the transparent biaxially oriented polyamide film (BOPA) 32 layer through a gravure coating mode, a polymer liquid is coated on the outer layer of the colored biaxially oriented polyamide film (BOPA) 32 layer to form a polymer coating 31 through a gravure coating mode, a high-temperature resistant adhesive layer 33 is coated on the inner layer of the ink layer 34 and is adhered to one surface of the metal layer 1 through a dry process, and the hot-melt polypropylene film 2 is adhered to the other surface of the metal layer 1.
The resulting packaging film for electrochemical cells was colored in appearance. The prepared packaging film is subjected to peel strength and forming depth tests, so that various performance requirements of the packaging film for the electrochemical cell are met, and the packaging film is simple in preparation process and convenient for industrial production.
Example 6
As shown in fig. 2, the packaging film for electrochemical cells according to the present embodiment sequentially includes, from the outside to the inside: a polymer coating 31 added with organic pigment, a transparent high temperature resistant polyester or polyamide film layer 32, an ink layer 34 added with organic pigment, a transparent high temperature resistant adhesive layer 33, a metal layer 1 and a transparent hot melt polypropylene film layer 2. The polymer coating 31 and the ink layer 34 are color layers, and the high temperature resistant polyester or polyamide film layer 32, the high temperature resistant adhesive layer 33 and the hot melt polypropylene film layer 2 are transparent layers.
The high temperature resistant polyester or polyamide film layer 32 is, for example, 25um thick biaxially oriented polyamide film (BOPA) of japan xinnah company, the metal layer 1 is 40um thick O-state soft aluminum foil of japan dongyang aluminum industry, the hot melt polypropylene film 2 is 40um thick hot melt polypropylene film, or polypropylene film produced by japan dongyi film processing corporation, the ink layer is a halogen-free colored ink of japan electronics corporation, and has a coating amount of about 1.75 g/m, the high temperature resistant adhesive layer 33 is a two-component high temperature resistant thermosetting adhesive of a film for electrochemical cells of japan dongyang company, and has a coating amount of about 4 g/m, and the polymer coating layer 31 is a halogen-free chemical treatment liquid of shanghaca garlica limited, and has a coating amount of about 2.5 g/m.
The ink layer 34 added with the organic pigment is a mixture liquid formed by acrylic resin, epoxy resin, polyurethane resin, phenolic resin and nano-scale organic pigment, a color layer is formed on the inner surface layer of the transparent biaxially oriented polyamide film (BOPA) 32 layer through a gravure coating mode, a polymer liquid is coated on the outer layer of the colored biaxially oriented polyamide film (BOPA) 32 layer to form a polymer coating 31 through a gravure coating mode, a high-temperature resistant bonding layer 33 is coated on the inner layer of the ink layer 34 and is bonded with one surface of the metal layer 1 through a dry process, and the hot-melt polypropylene film 2 is bonded with the other surface of the metal layer 1.
The resulting packaging film for electrochemical cells was colored in appearance. The prepared packaging film is subjected to peel strength and forming depth tests, so that various performance requirements of the packaging film for the electrochemical cell are met, and the packaging film is simple in preparation process and convenient for industrial production.
The polymer coating 31 added with the organic pigment is formed by coating a chemical mixture liquid of tetrasodium pyrophosphate, sodium metasilicate pentahydrate, polyalkyl ether and a nano-scale organic pigment on the outer surface of a transparent biaxially oriented polyamide film (BOPA) layer 32 in a gravure coating mode to form a color layer, coating a mixture liquid formed by acrylic resin, epoxy resin, polyurethane resin, phenolic resin and the nano-scale organic pigment on the inner layer of the colored biaxially oriented polyamide film (BOPA) layer 32 and forming an ink layer 34 in a gravure coating mode, coating a high-temperature resistant bonding layer 33 on the inner layer of the ink layer 34 and bonding the high-temperature resistant bonding layer with one surface of the metal layer 1 by using a dry process, and bonding the hot-melt polypropylene film 2 with the other surface of the metal layer 1.
The resulting packaging film for electrochemical cells was colored in appearance. The prepared packaging film is subjected to peel strength and forming depth tests, so that various performance requirements of the packaging film for the electrochemical cell are met, and the packaging film is simple in preparation process and convenient for industrial production.
In summary, the organic pigment is added in the protective layer, the protective layer added with the organic pigment can enhance the lamination strength between the protective layer and the metal layer, so that the peeling strength and deep drawing forming performance of the packaging film are improved, and the normal use of the electrochemical cell is ensured. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Those skilled in the art can modify or change the above-described embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and scope of the present invention as defined in the appended claims.
Claims (16)
1. A packaging film for an electrochemical cell, comprising:
a metal layer;
the heat sealing layer is arranged on one side of the metal layer;
the protective layer added with organic pigment is arranged on the other side of the metal layer;
the protective layer sequentially comprises a polymer coating, a film layer and an adhesive layer.
2. The packaging film for electrochemical cells according to claim 1, characterized in that: the raw materials for preparing the organic pigment comprise one or more of the compositions in the group consisting of natural cyanine, gamboge and alizarin red.
3. The packaging film for electrochemical cells according to claim 1, characterized in that: at least one of the polymer coating layer, the film layer and the bonding layer is added with the organic pigment.
4. The packaging film for electrochemical cells according to claim 1, characterized in that: an ink layer is arranged between the film layer and the bonding layer, and at least the organic pigment is added into the ink layer.
5. The packaging film for electrochemical cells according to claim 4, characterized in that: the material of the ink layer comprises one or a combination of acrylic resin, epoxy resin, polyurethane resin and phenolic resin.
6. The packaging film for electrochemical cells according to claim 1, characterized in that: the material of the polymer coating comprises a composition of one or more of the group consisting of tetrasodium pyrophosphate, sodium metasilicate pentahydrate, polyalkyl ether, polyester acrylic, and fluoropolymer.
7. The packaging film for electrochemical cells according to claim 1, characterized in that: the adhesive layer is made of one or more of polyurethane resins, epoxy resins, acrylate resins, polystyrene resins, phenolic resins, polyacrylic resins, and ethylene-vinyl acetate copolymer resins.
8. The packaging film for electrochemical cells according to claim 1, characterized in that: the organic pigment includes at least one of an azo pigment and a phthalocyanine pigment.
9. The packaging film for electrochemical cells according to claim 1, characterized in that: the metal layer comprises an aluminum foil layer or a copper foil layer.
10. The packaging film for electrochemical cells according to claim 1, characterized in that: the material of the heat sealing layer comprises hot-melt polypropylene.
11. The packaging film for electrochemical cells according to claim 10, characterized in that: the hot melt polypropylene comprises one or more of polypropylene resin, polyamide resin, ethylene propylene rubber, polyacrylate and polyvinylidene chloride.
12. A method of making a packaging film for an electrochemical cell, the method comprising:
laminating the protective layer added with the organic pigment with one side of the metal layer, wherein the protective layer comprises a polymer coating, a film layer and an adhesive layer which are sequentially adhered;
and laminating a heat sealing layer with the other side of the metal layer.
13. The method for producing a packaging film for an electrochemical cell according to claim 12, characterized in that: in the lamination step, lamination is performed by a dry coating method, a thermal method, a dry method, or a thermal bonding method.
14. The method of manufacturing a packaging film for an electrochemical cell according to claim 12, characterized in that: the adhesion method of the polymer coating layer and the film layer comprises dip coating, gravure coating or five-roller reversing mode.
15. The method for producing a packaging film for an electrochemical cell according to claim 12, characterized in that: the polymeric coating layer is applied at a weight of from 1 to 4 grams per square meter and the adhesive layer is applied at a weight of from 2 to 6 grams per square meter.
16. An electrochemical cell comprising the packaging film for an electrochemical cell according to any one of claims 1 to 11.
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