CN110757905B - Aluminum plastic film for lithium battery flexible packaging material and surface treatment method of metal aluminum foil of aluminum plastic film - Google Patents
Aluminum plastic film for lithium battery flexible packaging material and surface treatment method of metal aluminum foil of aluminum plastic film Download PDFInfo
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- CN110757905B CN110757905B CN201911053092.9A CN201911053092A CN110757905B CN 110757905 B CN110757905 B CN 110757905B CN 201911053092 A CN201911053092 A CN 201911053092A CN 110757905 B CN110757905 B CN 110757905B
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 98
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 97
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 66
- 239000002184 metal Substances 0.000 title claims abstract description 66
- 239000011888 foil Substances 0.000 title claims abstract description 61
- 239000002985 plastic film Substances 0.000 title claims abstract description 43
- 229920006255 plastic film Polymers 0.000 title claims abstract description 43
- 238000004381 surface treatment Methods 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 39
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 30
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 30
- 239000005021 flexible packaging material Substances 0.000 title claims abstract description 25
- 239000007788 liquid Substances 0.000 claims abstract description 21
- 239000000126 substance Substances 0.000 claims abstract description 17
- 239000002952 polymeric resin Substances 0.000 claims abstract description 11
- 239000002994 raw material Substances 0.000 claims abstract description 11
- 230000001070 adhesive effect Effects 0.000 claims abstract description 8
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 claims abstract description 8
- NBIIXXVUZAFLBC-UHFFFAOYSA-N phosphoric acid Substances OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims abstract description 8
- 150000003839 salts Chemical class 0.000 claims abstract description 8
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000000853 adhesive Substances 0.000 claims abstract description 7
- 239000011737 fluorine Substances 0.000 claims abstract description 7
- 229910052731 fluorine Inorganic materials 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims abstract description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 229920005992 thermoplastic resin Polymers 0.000 claims description 9
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 8
- 229910052804 chromium Inorganic materials 0.000 claims description 8
- 239000011651 chromium Substances 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 8
- 238000002791 soaking Methods 0.000 claims description 8
- 229920003002 synthetic resin Polymers 0.000 claims description 7
- 229920005989 resin Polymers 0.000 claims description 6
- 239000011347 resin Substances 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 5
- 238000005238 degreasing Methods 0.000 claims description 4
- 239000005022 packaging material Substances 0.000 claims description 4
- NROKBHXJSPEDAR-UHFFFAOYSA-M potassium fluoride Chemical compound [F-].[K+] NROKBHXJSPEDAR-UHFFFAOYSA-M 0.000 claims description 4
- PUZPDOWCWNUUKD-UHFFFAOYSA-M sodium fluoride Chemical compound [F-].[Na+] PUZPDOWCWNUUKD-UHFFFAOYSA-M 0.000 claims description 4
- DDFHBQSCUXNBSA-UHFFFAOYSA-N 5-(5-carboxythiophen-2-yl)thiophene-2-carboxylic acid Chemical compound S1C(C(=O)O)=CC=C1C1=CC=C(C(O)=O)S1 DDFHBQSCUXNBSA-UHFFFAOYSA-N 0.000 claims description 2
- 239000004925 Acrylic resin Substances 0.000 claims description 2
- 239000005011 phenolic resin Substances 0.000 claims description 2
- 239000011698 potassium fluoride Substances 0.000 claims description 2
- 235000003270 potassium fluoride Nutrition 0.000 claims description 2
- 239000011775 sodium fluoride Substances 0.000 claims description 2
- 235000013024 sodium fluoride Nutrition 0.000 claims description 2
- 239000005030 aluminium foil Substances 0.000 claims 4
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims 1
- 229920000178 Acrylic resin Polymers 0.000 claims 1
- 238000009459 flexible packaging Methods 0.000 claims 1
- 239000012528 membrane Substances 0.000 claims 1
- 229920001568 phenolic resin Polymers 0.000 claims 1
- 230000007797 corrosion Effects 0.000 abstract description 12
- 238000005260 corrosion Methods 0.000 abstract description 12
- 239000000463 material Substances 0.000 abstract description 6
- 238000004026 adhesive bonding Methods 0.000 abstract description 3
- 229910052755 nonmetal Inorganic materials 0.000 abstract description 3
- 230000000052 comparative effect Effects 0.000 description 12
- 239000012790 adhesive layer Substances 0.000 description 8
- 229920006015 heat resistant resin Polymers 0.000 description 8
- 238000012360 testing method Methods 0.000 description 8
- -1 light Substances 0.000 description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- OMQSJNWFFJOIMO-UHFFFAOYSA-J zirconium tetrafluoride Chemical compound F[Zr](F)(F)F OMQSJNWFFJOIMO-UHFFFAOYSA-J 0.000 description 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- 230000032798 delamination Effects 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- OEPOKWHJYJXUGD-UHFFFAOYSA-N 2-(3-phenylmethoxyphenyl)-1,3-thiazole-4-carbaldehyde Chemical compound O=CC1=CSC(C=2C=C(OCC=3C=CC=CC=3)C=CC=2)=N1 OEPOKWHJYJXUGD-UHFFFAOYSA-N 0.000 description 1
- 229920002284 Cellulose triacetate Polymers 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- NNLVGZFZQQXQNW-ADJNRHBOSA-N [(2r,3r,4s,5r,6s)-4,5-diacetyloxy-3-[(2s,3r,4s,5r,6r)-3,4,5-triacetyloxy-6-(acetyloxymethyl)oxan-2-yl]oxy-6-[(2r,3r,4s,5r,6s)-4,5,6-triacetyloxy-2-(acetyloxymethyl)oxan-3-yl]oxyoxan-2-yl]methyl acetate Chemical compound O([C@@H]1O[C@@H]([C@H]([C@H](OC(C)=O)[C@H]1OC(C)=O)O[C@H]1[C@@H]([C@@H](OC(C)=O)[C@H](OC(C)=O)[C@@H](COC(C)=O)O1)OC(C)=O)COC(=O)C)[C@@H]1[C@@H](COC(C)=O)O[C@@H](OC(C)=O)[C@H](OC(C)=O)[C@H]1OC(C)=O NNLVGZFZQQXQNW-ADJNRHBOSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000012461 cellulose resin Substances 0.000 description 1
- 238000007739 conversion coating Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- NJLLQSBAHIKGKF-UHFFFAOYSA-N dipotassium dioxido(oxo)titanium Chemical compound [K+].[K+].[O-][Ti]([O-])=O NJLLQSBAHIKGKF-UHFFFAOYSA-N 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 229920003986 novolac Polymers 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 229920006284 nylon film Polymers 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 229920005668 polycarbonate resin Polymers 0.000 description 1
- 239000004431 polycarbonate resin Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 239000009719 polyimide resin Substances 0.000 description 1
- 229920000193 polymethacrylate Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- GROMGGTZECPEKN-UHFFFAOYSA-N sodium metatitanate Chemical compound [Na+].[Na+].[O-][Ti](=O)O[Ti](=O)O[Ti]([O-])=O GROMGGTZECPEKN-UHFFFAOYSA-N 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- LLZRNZOLAXHGLL-UHFFFAOYSA-J titanic acid Chemical compound O[Ti](O)(O)O LLZRNZOLAXHGLL-UHFFFAOYSA-J 0.000 description 1
- PMTRSEDNJGMXLN-UHFFFAOYSA-N titanium zirconium Chemical compound [Ti].[Zr] PMTRSEDNJGMXLN-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- 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
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
-
- 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
-
- 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
-
- 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
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
-
- 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
-
- 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
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Chemical Treatment Of Metals (AREA)
Abstract
The invention relates to an aluminum plastic film for a lithium battery flexible packaging material and a surface treatment method of a metal aluminum foil thereof, wherein the surface treatment method comprises the step of treating the surface of the metal aluminum foil by adopting surface treatment liquid, and the raw material formula of the surface treatment liquid comprises the following components: 1g/m3‑1000g/m3Polymer resin, 0.1g/m3‑500g/m3Phosphoric acid, 0.1g/m3‑1000g/m3Chromic acid, 0.1g/m3‑1000g/m3Fluorine-containing metal salt and water. The invention adopts specific surface treatment liquid to carry out surface treatment on the metal aluminum foil, and a chemical film is formed on the surface of the metal aluminum foil, so that the corrosion resistance and the adhesive force of gluing of the metal aluminum foil are greatly improved, and the bonding performance between the metal aluminum foil and a non-metal film is improved. The aluminum foil is used for aluminum plastic films for lithium battery flexible packaging materials, and aluminum plastic film materials with good corrosion resistance can be obtained.
Description
Technical Field
The invention belongs to the technical field of aluminum plastic films for lithium battery flexible packaging materials, and particularly relates to an aluminum plastic film for a lithium battery flexible packaging material and a surface treatment method of a metal aluminum foil of the aluminum plastic film.
Background
The aluminum-plastic film is an important outer packaging material for the soft package of the lithium ion battery, the traditional aluminum-plastic film structure generally comprises a heat-resistant resin film, a metal aluminum foil and a thermoplastic resin film which are sequentially arranged, and the heat-resistant resin film and the metal aluminum foil, and the thermoplastic resin film and the metal aluminum foil are respectively bonded through an adhesive. In the conventional aluminum-plastic film, since the polymer resin films are used on the outer side and the inner side of the aluminum-plastic film material, light, oxygen and moisture in the external environment may penetrate through the polymer resin films and enter the interior, and internal substances (such as LiB electrolyte components) may permeate the interior. When these invading substances reach the metallic aluminum foil layer, corrosion of the metallic aluminum foil may result.
In order to improve the corrosion phenomenon, the surface of the metal aluminum foil is usually treated, and a common method is to use a trivalent chromium medicament to spray the surface of the metal aluminum foil, but the existing trivalent chromium medicament generally has the problems of poor corrosion performance, poor gluing adhesion and the like.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide an improved surface treatment method for a metal aluminum foil in an aluminum plastic film for a lithium battery packaging material.
The invention also provides an aluminum plastic film for the lithium battery packaging material.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a surface treatment method of a metal aluminum foil in an aluminum plastic film for a lithium battery flexible packaging material comprises the step of treating the surface of the metal aluminum foil by adopting a surface treatment liquid, wherein the raw material formula of the surface treatment liquid comprises the following components: 1g/m3-1000g/m3Polymer resin, 0.1g/m3-500g/m3Phosphoric acid, 0.1g/m3-1000g/m3Chromic acid, 0.1g/m3-1000g/m3Fluorine-containing metal salt and water.
Preferably, the raw material formula of the surface treatment liquid comprises the following components: 2g/m3-1000g/m3Polymer resin, 0.1g/m3-500g/m3Phosphoric acid, 1g/m3-500g/m3Chromic acid, 0.1g/m3-500g/m3Fluorine-containing metal salt and water.
Preferably, the fluorine-containing metal salt is not particularly limited, and may be one or a combination of several selected from the group consisting of a titanium zirconium compound such as zirconium fluoride/potassium titanate, zirconium fluoride/sodium titanate, zirconium fluoride/titanic acid, and the like, and a fluoride such as hydrofluoric acid, sodium fluoride, potassium fluoride, ammonium fluoride, and the like.
Preferably, the polymer resin is not particularly limited, and may be one or a combination of several selected from polycarbonate resin, poly (meth) acrylate resin, polyethylene terephthalate resin, triacetyl cellulose resin, polyester resin, epoxy resin, polyimide resin, novolac resin, phenol resin, polyurethane resin, fluorine-containing resin, vinylidene chloride resin, and the like, for example.
In order to facilitate the dissolution of the polymer resin, the polymer resin is selected from powdered resins.
According to a further embodiment of the present invention, the treating step includes immersing the metal aluminum foil in the surface treatment solution, drying the metal aluminum foil, and forming a chemical film on the surface of the metal aluminum foil, wherein the immersion temperature is 20 to 75 ℃ and the immersion time is 2s to 120 s. The formed chemical film is beneficial to improving the corrosion resistance of the metal aluminum foil and improving the bonding property of the metal aluminum foil and the non-metal film.
The different soaking conditions of the metal aluminum foil in the surface treatment liquid can affect the corrosion condition of the treatment liquid on the surface of the metal aluminum foil, the thickness of a formed film, the adhesion amount of chromium and the like, the soaking temperature is too low, the dissolution of polymer resin is not facilitated, the formation of the film is further affected, and the corrosion on the surface of the metal aluminum foil is accelerated due to too high temperature; the soaking time is too short, chromium does not adhere well to the surface of aluminum, and the soaking time is too long, corrosion of the surface of the aluminum foil is accelerated.
Preferably, the drying temperature is 50-200 ℃.
According to a preferred embodiment of the present invention, the chemical conversion coating has a thickness of 10nm to 1 × 104nm, the preferable thickness of the chemical film is 30-100 nm; the chromium content in the chemical film is 0.1-50 mg/m2The amount of chromium deposited in the chemical film is preferably 2 to 20mg/m2. The aluminum-plastic film material with good corrosion resistance can be obtained by selecting proper film forming thickness and chromium adhesion amount.
According to a further embodiment of the present invention, the method further comprises degreasing the metal aluminum foil with 1-20% sodium hydroxide at 50-80 ℃ for 5-120 s before treating the metal aluminum foil with the surface treatment solution.
Preferably, the thickness of the metal aluminum foil is 20-100 um.
The invention adopts another technical scheme that: the aluminum plastic film for the lithium battery flexible packaging material comprises a heat-resistant resin film, a metal aluminum foil and a thermoplastic resin film which are sequentially arranged, wherein the heat-resistant resin film and the metal aluminum foil are respectively bonded through an adhesive, and the metal aluminum foil is treated through the surface treatment method.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
the invention adopts specific surface treatment liquid to carry out surface treatment on the metal aluminum foil, and a chemical film is formed on the surface of the metal aluminum foil, so that the corrosion resistance and the adhesive force of gluing of the metal aluminum foil are greatly improved, and the bonding performance between the metal aluminum foil and a non-metal film is improved. The aluminum foil is used for aluminum plastic films for lithium battery flexible packaging materials, and aluminum plastic film materials with good corrosion resistance can be obtained.
Drawings
FIG. 1 is a schematic structural view of an aluminum plastic film for a flexible packaging material of a lithium battery in example 1;
in the figure: 1. a metal aluminum foil; 2. a first chemical film; 3. a second chemical film; 4. a heat-resistant resin film; 5. a thermoplastic resin film; 6. a first adhesive layer; 7. a second adhesive layer.
Detailed Description
Specific embodiments of the present invention will be described in further detail with reference to specific examples, but the scope of the present invention is not limited thereto.
Example 1
The aluminum plastic film for the lithium battery soft packing material provided by the embodiment comprises a heat-resistant resin film 4, a first adhesive layer 6, a metal aluminum foil 1, a second adhesive layer 7 and a thermoplastic resin film 5 which are sequentially arranged, wherein,
the heat-resistant resin film 4 is a biaxially oriented nylon film with a thickness of 25 um; the thermoplastic resin film 5 is an unstretched polypropylene film with the thickness of 30 um; the first adhesive layer 6 is a polyurethane adhesive (selected from Shanghai Baert New Material science and technology Co., Ltd.) with a thickness of 0.1-10um, in this case, 5 um; the second adhesive layer 7 is a polyacrylic adhesive (selected from Shandong Hua Cheng Gaokao Adhesives Co., Ltd.) and has a thickness of 0.1-10um, in this example, 5 um.
The metal aluminum foil adopted in the embodiment is firstly subjected to surface treatment and then used for manufacturing the aluminum-plastic film, and the specific surface treatment method comprises the following steps:
(1) the metal aluminum foil is 35 um;
(2) firstly, degreasing the metal aluminum foil by using a 10% sodium hydroxide solution at 70 ℃ to remove surface grease for 1 minute;
(3) soaking the metal aluminum foil in the surface treatment liquid at 50 ℃ for 1 minute, drying at 80 ℃, and respectively forming a first chemical skin film 2 and a second chemical skin film 3 on the two surfaces of the metal aluminum foil.
In this example, the first skin forming film 2 and the heat-resistant resin film 4 are bonded by the first adhesive layer 6, and the second skin forming film 3 and the thermoplastic resin film 5 are bonded by the second adhesive layer 7.
The composition of the raw materials of the surface treatment liquid used in this example is shown in table 1.
Example 2
The aluminum plastic film for a lithium battery flexible packaging material provided in this example is the same as in example 1 except that the surface treatment solution and the treatment process used are different.
The composition of the raw materials and the treatment process of the surface treatment liquid used in this example are shown in table 1.
Example 3
The aluminum plastic film for a lithium battery flexible packaging material provided in this example is the same as in example 1 except that the surface treatment solution and the treatment process used are different.
The composition of the raw materials and the treatment process of the surface treatment liquid used in this example are shown in table 1.
Example 4
The aluminum plastic film for a lithium battery flexible packaging material provided in this example is the same as in example 1 except that the surface treatment solution and the treatment process used are different.
The composition of the raw materials and the treatment process of the surface treatment liquid used in this example are shown in table 1.
Example 5
The aluminum plastic film for a lithium battery flexible packaging material provided in this example is the same as in example 1 except that the surface treatment solution and the treatment process used are different.
The composition of the raw materials and the treatment process of the surface treatment liquid used in this example are shown in table 1.
Comparative example 1
The aluminum plastic film for the lithium battery flexible packaging material provided by the comparative example is the same as that in example 1 except that the adopted surface treatment solution and treatment process are different.
The composition of the raw materials and the treatment process of the surface treatment liquid used in this example are shown in Table 2.
Comparative example 2
The aluminum plastic film for the lithium battery flexible packaging material provided by the comparative example is the same as that in example 1 except that the adopted surface treatment solution and treatment process are different.
The composition of the raw materials and the treatment process of the surface treatment liquid used in this example are shown in Table 2.
Comparative example 3
The aluminum plastic film for the lithium battery flexible packaging material provided by the comparative example is the same as that in example 2 except that the adopted treatment process is different.
In this example, the treatment process used is shown in Table 2.
Comparative example 4
The aluminum plastic film for the lithium battery flexible packaging material provided by the comparative example is the same as that in example 2 except that the adopted treatment process is different.
In this example, the treatment process used is shown in Table 2.
Comparative example 5
The aluminum plastic film for the lithium battery flexible packaging material provided by the comparative example is the same as that in example 2 except that the adopted treatment process is different.
In this example, the treatment process used is shown in Table 2.
The aluminum plastic films of examples 1 to 5 and comparative examples 1 to 5 were subjected to a salt water spray test (refer to JIS Z2371 test standard), and the results are shown in tables 1 and 2, and the test methods were:
1. test conditions
The temperature of the spraying chamber is 35 +/-2 ℃, the concentration of saline water is 5 +/-1 percent of NaCl solution, the pH of the spraying solution is neutral (pH is 6.5-7.2), and the spraying is continuously carried out. And (3) mist reduction amount: 2ml/h/80cm 2.
2. Test equipment: standard salt fog tester, oven
3. Test conditions and time: and (5) 48 h.
4. And (3) testing results: whether layering occurs between the metal aluminum foil and the outer nylon layer is observed, and the judgment standard is as follows:
o: no delamination by peeling was observed
X: delamination by peeling was observed
Table 1 shows the test results of the aluminum plastic films of examples 1-5
Table 2 shows the test results of the aluminum-plastic films of comparative examples 1 to 5
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (8)
1. Surface treatment method for metal aluminum foil in aluminum plastic film for lithium battery flexible packaging materialThe method is characterized by comprising the step of treating the surface of the metal aluminum foil by adopting surface treatment liquid, wherein the raw material formula of the surface treatment liquid comprises the following components: 1g/m3-1000g/m3Polymer resin, 0.1g/m3-500g/m3Phosphoric acid, 0.1g/m3-1000g/m3Chromic acid, 0.1g/m3-1000g/m3Fluorine-containing metal salt and water;
the polymer resin is a mixture of acrylic resin and phenolic resin;
the treatment step comprises the steps of soaking the metal aluminum foil in the surface treatment liquid, drying, and forming a chemical film on the surface of the metal aluminum foil, wherein the soaking temperature is 20-75 ℃, and the soaking time is 2-120 s.
2. The method for treating the surface of the metal aluminum foil in the aluminum plastic film for the flexible packaging material of the lithium battery as claimed in claim 1, wherein: the fluorine-containing metal salt is one or a combination of sodium fluoride, potassium fluoride and ammonium fluoride.
3. The method for treating the surface of the metal aluminum foil in the aluminum plastic film for the flexible packaging material of the lithium battery as claimed in claim 1, wherein: the drying temperature is 50-200 ℃.
4. The method for treating the surface of the metal aluminum foil in the aluminum plastic film for the flexible packaging material of the lithium battery as claimed in claim 1, wherein: the thickness of the chemical film is 10nm to 1 × 104nm。
5. The method for treating the surface of the metal aluminum foil in the aluminum plastic film for the flexible packaging material of the lithium battery as claimed in claim 1, wherein: the chromium content in the chemical film is 0.1-50 mg/m2。
6. The method for treating the surface of the metal aluminum foil in the aluminum plastic film for the flexible packaging material of the lithium battery as claimed in claim 1, wherein: the method also comprises the step of degreasing the metal aluminum foil by using sodium hydroxide with the concentration of 1-20% before the metal aluminum foil is treated by using the surface treatment liquid, wherein the degreasing temperature is 50-80 ℃, and the time is 5-120 s.
7. The method for treating the surface of the metal aluminum foil in the aluminum plastic film for the flexible packaging material of the lithium battery as claimed in claim 1, wherein: the thickness of metal aluminium foil is 20~100 um.
8. The utility model provides a lithium cell plastic-aluminum membrane for soft packaging material, is including the heat resistance resin film, metal aluminium foil and the thermoplastic resin film that set gradually, between heat resistance resin film and the metal aluminium foil, bond its characterized in that through the adhesive between thermoplastic resin film and the metal aluminium foil respectively: the metal aluminum foil is treated by the surface treatment method according to any one of claims 1 to 7.
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| CN112018276A (en) * | 2020-08-21 | 2020-12-01 | 苏州新景新材料科技有限公司 | Method for improving deep punching performance of aluminum-plastic film |
| CN113517504B (en) * | 2020-12-07 | 2022-08-02 | 江西睿捷新材料科技有限公司 | Metal composite film and electrochemical device thereof |
| CN113059884A (en) * | 2021-03-17 | 2021-07-02 | 上海恩捷新材料科技有限公司 | A highly moldable and highly durable outer packaging material for battery elements, and a battery |
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