WO2021196669A1 - 一种锂电池封装用铝塑膜及其制备方法 - Google Patents

一种锂电池封装用铝塑膜及其制备方法 Download PDF

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Publication number
WO2021196669A1
WO2021196669A1 PCT/CN2020/131551 CN2020131551W WO2021196669A1 WO 2021196669 A1 WO2021196669 A1 WO 2021196669A1 CN 2020131551 W CN2020131551 W CN 2020131551W WO 2021196669 A1 WO2021196669 A1 WO 2021196669A1
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aluminum
layer
plastic film
heat
antioxidant
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PCT/CN2020/131551
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English (en)
French (fr)
Inventor
周新平
刘礼
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江西明冠锂膜技术有限公司
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Publication of WO2021196669A1 publication Critical patent/WO2021196669A1/zh

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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
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/14—Layered products comprising a layer of metal next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • 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
    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer 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
    • 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
    • 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
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/02—Non-macromolecular additives
    • C09J11/04—Non-macromolecular additives inorganic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/02—Non-macromolecular additives
    • C09J11/06—Non-macromolecular additives organic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/08—Macromolecular additives
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J123/00—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers
    • C09J123/02—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers not modified by chemical after-treatment
    • C09J123/04—Homopolymers or copolymers of ethene
    • C09J123/08—Copolymers of ethene
    • C09J123/0807—Copolymers of ethene with unsaturated hydrocarbons only containing more than three carbon atoms
    • C09J123/0815—Copolymers of ethene with aliphatic 1-olefins
    • 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
    • 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
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0292—Polyurethane fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/724—Permeability to gases, adsorption
    • B32B2307/7242—Non-permeable
    • B32B2307/7244—Oxygen barrier
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/724—Permeability to gases, adsorption
    • B32B2307/7242—Non-permeable
    • B32B2307/7246—Water vapor barrier
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/752—Corrosion inhibitor
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
    • C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the invention relates to the technical field of lithium battery packaging soft pack materials, in particular to an aluminum plastic film for lithium battery packaging and a preparation method thereof.
  • the soft-packed lithium battery packaged with aluminum-plastic film has the characteristics of flexible shape, good safety performance and high energy density, which greatly improves the flexibility and applicability of battery design, so that it can be made into a variety of shapes and capacities according to product requirements. Batteries provide developers with high design flexibility and adaptability in power solutions.
  • mainstream digital products and electric vehicles mainly use soft-packed lithium batteries.
  • ordinary aluminum-plastic films cannot meet the performance requirements of polymer lithium battery packaging materials.
  • the packaging materials are usually required to be extremely high.
  • the aluminum plastic film produced by the current low temperature 40 °C constant temperature curing molding process has aluminum plastic film Poor white lines, poor sol properties and low peel force after the shell is flushed.
  • the purpose of the present invention is to provide an aluminum-plastic film for lithium battery packaging.
  • the aluminum-plastic film has excellent barrier properties, ductility and corrosion resistance, as well as good Heat-sealable aluminum leakage prevention effect.
  • Another object of the present invention is to provide a method for preparing aluminum plastic film for lithium battery encapsulation.
  • the method uses a high-low temperature curing process to make the prepared aluminum plastic film overcome the previous use of low temperature 40 °C constant temperature curing molding to obtain aluminum plastic film Poor white lines, poor sol properties and low peel force after the shell is flushed.
  • an aluminum plastic film for lithium battery packaging includes a polyurethane fiber layer, an aluminum foil layer and a polypropylene heat-sealing layer from top to bottom, and the aluminum foil layer is attached to The upper surface of the polypropylene heat-sealing layer, the polyurethane fiber is attached to the upper surface of the aluminum foil layer, the polyurethane fiber layer and the aluminum foil layer are attached by a modified polyolefin adhesive, and the aluminum foil layer is attached to the aluminum foil layer.
  • the polypropylene heat-sealing layers are bonded together by a polyurethane adhesive
  • the polyurethane adhesive is the German Weiss group corner glue COSMOPUR 818C German Weiss polyurethane adhesive
  • the modified polyolefin adhesive includes the following parts by weight of raw materials:
  • the polyolefin is POE 8180 Dow Polyolefin.
  • the aluminum-plastic film in the present invention is made of a polyurethane fiber layer, an aluminum foil layer and a polypropylene heat-sealing layer that are laminated sequentially from top to bottom, and the polyurethane fiber layer and the aluminum foil layer are bonded through a modified polyolefin adhesive.
  • the aluminum foil layer and the polypropylene heat-sealing layer are bonded by polyurethane adhesive, so that the aluminum-plastic film has excellent barrier properties, ductility and corrosion resistance, and also has good heat-sealable sol-proof aluminum leakage , And the condition of the white line after the shell is placed.
  • the polyurethane fiber layer used can effectively prevent the penetration of air, especially oxygen, and maintain the internal environment of the battery.
  • the packaging aluminum foil has good deformability; the setting of the aluminum foil layer can effectively prevent the penetration of moisture in the air and maintain the internal battery
  • the structure has a certain thickness and strength, which can prevent external force from damaging the cell; and the polypropylene heat-seal layer will not be dissolved, corroded and swelled by the organic solvent in the cell. It is the most direct packaging for the internal environment of the cell Protect, insulate, effectively prevent the internal electrolyte from contacting the aluminum foil layer, and avoid the aluminum foil layer from being corroded.
  • the ⁇ -methylstyrene dimer used in the modified polyolefin adhesive uses linear dimer as the molecular chain transfer agent, which can make the modified polyolefin adhesive have good adhesion and anti-foaming properties. , Smoothness, surface strength and ease of printing; and dibenzoyl peroxide as the initiator of the adhesive is to use the free radical generated by the electron transfer between the oxidizing agent and the reducing agent to initiate the polymerization reaction, which can improve the preparation of modified polyolefin adhesives
  • the reaction rate of the polyolefin is low, and the energy consumption is reduced; and the characteristics of low surface energy, high crystallinity, weak polarity and poor viscosity of polyolefins require the use of the above-mentioned raw materials and processes for modification to improve its bonding performance.
  • each part of the modified epoxy resin includes the following parts by weight of raw materials:
  • the modified epoxy resin is prepared by the following method:
  • step S2 Add the polyurethane prepolymer and silica to the mixture A obtained in step S1, heat to 80-120°C and stir for 20-40 minutes, then add N,N-dimethylformamide and continue with the mixture at 300-450r Stir for 1-3h at a rate of /min, and obtain modified epoxy resin after cooling.
  • the modified epoxy resin after the above-mentioned raw material and process modification has good wear resistance, scratch resistance and tensile resistance.
  • N, N dimethyl formamide can be used as an organic solvent to disperse silica and graphene into epoxy resin together with melamine to fill and modify epoxy resin; while polyurethane prepolymer can be used as modified epoxy
  • the main component with adhesive function in the resin assists in improving the bonding performance, ductility and barrier properties of the modified polyolefin adhesive during the preparation process of the modified polyolefin adhesive; in addition, in the process of preparing the modified epoxy resin It is necessary to strictly control the stirring rate in step S1 to be 200-300r/min.
  • each portion of the curing agent is at least one of p-hydroxybenzenesulfonic acid, n-butyl ester, methylhexahydrophthalic anhydride, and tin laurate; more preferably, the curing agent is made of p-hydroxybenzenesulfonic acid, n-butyl ester, methylhexahydrophthalic anhydride, and tin laurate.
  • Each of the antioxidants is at least one of antioxidant 1010, antioxidant 168, antioxidant 619, antioxidant 703, antioxidant BHT, antioxidant 2112 and antioxidant 703; preferably
  • the antioxidant is a mixture composed of antioxidant 1010, antioxidant 168, antioxidant 2112 and antioxidant 703 in a weight ratio of 0.4-0.8:0.8-1.2:0.6-1.0:0.1-0.5.
  • the p-hydroxybenzene sulfonic acid used in the curing agent of the present invention is used for curing the modified polyolefin adhesive and also has an emulsifying effect.
  • By synergizing p-hydroxybenzene sulfonic acid, n-butyl ester, methylhexahydrophthalic anhydride and lauric acid The advantages of the four tins further enhance the curing effect of the curing agent in the process of preparing the modified polyolefin adhesive, so that the prepared modified polyolefin adhesive has a good coating effect.
  • the antioxidant 1010 used has excellent oxidation resistance to modified epoxy resins and polyolefins.
  • Antioxidant 1010 can effectively prevent the thermal oxidative degradation of modified polyolefin adhesives during long-term aging, thereby extending the cost
  • the service life of the aluminum-plastic film can be used in conjunction with antioxidant 168 to have a synergistic effect; antioxidant 168, antioxidant 2112 and antioxidant 703 are auxiliary antioxidants of antioxidant 1010, and are combined with the main antioxidant.
  • the compound 1010 has a good synergistic effect, which can effectively prevent the thermal degradation of modified epoxy resin and polyolefin in basic injection molding, and give the modified polyolefin adhesive extra long-term protection.
  • each portion of the defoaming agent is at least one of polydimethylsiloxane, tributyl phosphate and paraffin wax; more preferably, the defoaming agent is made of polydimethylsiloxane , Tributyl phosphate and paraffin wax are a mixture of 0.6-1.0:0.8-1.2:0.1-0.5 by weight.
  • Each part of the crosslinking agent is a mixture composed of melamine, polymethylhydrogensiloxane and vinyl triethoxysilane in a weight ratio of 0.6-1.0:0.1-0.5:0.8-1.2.
  • Each portion of the solvent is at least one of acetone, butyl acetate, ethylene oxide, and isoamyl acetate; more preferably, the solvent is composed of acetone, butyl acetate, ethylene oxide and isoamyl acetate.
  • the amyl ester is a mixture of 0.4-0.8:0.6-1.0:0.1-0.5:0.8-1.2 by weight.
  • the defoaming agent in the present invention can remove air entrained in the preparation process of the modified polyolefin adhesive to form bubbles or generate bubbles due to reaction, so as to avoid affecting the adhesion effect of the modified polyolefin adhesive between the polyurethane fiber layer and the aluminum foil layer. This in turn affects the quality of the aluminum-plastic film product; the active hydrogen atoms directly connected to silicon atoms in the polymethylhydrogensiloxane molecule used in the crosslinking agent interact with the modified epoxy resin and the modified epoxy resin-polyolefin. The vinyl group undergoes addition reaction to vulcanize the raw rubber.
  • the solvent has a good dissolving effect on the above-mentioned raw materials, facilitates the fusion and diffusion of the raw materials, and can improve the efficiency of preparing the modified polyolefin adhesive.
  • the modified polyolefin adhesive is prepared by the following method:
  • step E3 Add the mixture B and defoamer obtained in step E2 to the mixture A obtained in step E1, mix and heat to 80-100°C, stir at 250-350r/min for 60-90min, then add the curing agent, and continue Stir for 40-60 minutes, then cool to room temperature and filter the filtrate that is the modified polyolefin adhesive.
  • the modified polyolefin adhesive in the present invention is prepared by using the above method.
  • the modified polyolefin adhesive prepared by the above method has good adhesion, smoothness, surface strength, solvent resistance and acid resistance.
  • the modified polyolefin adhesive provided by the present invention is coated on the surface of the polypropylene heat-sealing layer to form an inner modified polyolefin adhesive layer, and then the polypropylene heat-sealing layer with the inner modified polyolefin adhesive layer and the aluminum foil layer Dry compounding increases the electrolyte resistance of the aluminum-plastic film.
  • the temperature is too high, the initiation of dibenzoyl peroxide will be limited, which is not conducive to subsequent modified epoxy resins.
  • the temperature is too low, the Brownian motion of the system will decrease, which is not conducive to the dispersion and compounding of the raw materials; in addition, it is necessary to control the stirring rate in step E3 to 250-350r/min If the stirring rate is too fast, it will cause more bubbles in the system, which is not conducive to the subsequent defoaming, which will affect the quality of the modified polyolefin adhesive, and ultimately affect the quality of the aluminum-plastic film. If it is low, it is not conducive to the diffusion between the defoamer and the mixed system, and it is not conducive to the defoaming treatment of the modified polyolefin adhesive finally prepared.
  • the present invention also provides a method for preparing the aluminum plastic film for lithium battery packaging, which includes the following steps:
  • step 4) Then increase the temperature of the oven in step 3) to 80-90°C for high-temperature curing and molding for 71-73h;
  • step 4) Then the temperature of the oven in step 4) is lowered to 60-70°C for low-temperature molding for 64-66 hours to obtain the finished aluminum-plastic film.
  • the aluminum plastic film in the present invention is prepared by the above method, and the aluminum plastic film prepared by the above method has excellent barrier properties, heat sealing properties, ductility and corrosion resistance; the method uses a high and low temperature curing process to make The obtained aluminum-plastic film overcomes the problems of poor white lines, poor sol properties and low peeling force after the aluminum-plastic film is punched with a low temperature of 40 °C and constant temperature curing molding in the past; and the above method requires the maintenance control step 3), The heating temperature in step 4) and step 5) makes it a high and low temperature curing process.
  • the aluminum plastic film of the present invention has excellent barrier properties, heat sealing properties, ductility and corrosion resistance.
  • the modified polyolefin adhesive is coated on the surface of the polypropylene heat seal layer to form an inner modified polyolefin adhesive layer, and then the polypropylene heat seal layer with the inner modified polyolefin adhesive layer and the aluminum foil layer are dried Compound, increase the electrolyte resistance of aluminum plastic film.
  • the polyurethane fiber layer used can effectively prevent the penetration of air, especially oxygen, and maintain the internal environment of the battery.
  • the packaging aluminum foil has good deformability; the setting of the aluminum foil layer can effectively prevent the penetration of moisture in the air and maintain the internal battery
  • the structure has a certain thickness and strength, which can prevent external force from damaging the cell; and the polypropylene heat-seal layer will not be dissolved, corroded and swelled by the organic solvent in the cell. It is the most direct packaging for the internal environment of the cell Protect, insulate, effectively prevent the internal electrolyte from contacting the aluminum foil layer, and avoid the aluminum foil layer from being corroded.
  • the preparation method of the aluminum plastic film for lithium battery packaging of the present invention is simple and efficient, has convenient operation and control, and the produced product has high quality, which is beneficial to industrialized production.
  • the aluminum-plastic film comprises a polyurethane fiber layer, an aluminum foil layer and a polypropylene heat-sealing layer from top to bottom, and the aluminum foil layer is attached to the upper surface of the polypropylene heat-sealing layer,
  • the polyurethane fiber is attached to the upper surface of the aluminum foil layer, the polyurethane fiber layer and the aluminum foil layer are attached through a modified polyolefin adhesive, and the aluminum foil layer and the polypropylene heat-sealing layer are attached through a polyurethane adhesive.
  • the polyurethane adhesive is the German Weiss group corner glue COSMOPUR 818C German Weiss polyurethane adhesive
  • the modified polyolefin adhesive includes the following raw materials by weight:
  • the polyolefin is POE 8180 Dow Polyolefin.
  • Each part of the modified epoxy resin includes the following parts by weight of raw materials:
  • the polyurethane prepolymer is a polyurethane prepolymer HC-8799AB produced by Shanghai Crane City Polymer Technology Co., Ltd.; the model of the epoxy resin is epoxy resin E44.
  • the modified epoxy resin is prepared by the following method:
  • step S2 Add polyurethane prepolymer and silica to the mixture A obtained in step S1, heat to 80°C and stir for 20min, then add N,N-dimethylformamide and continue to stir at 300r/min for 1h , After cooling, a modified epoxy resin is obtained.
  • Each part of the curing agent is a mixture composed of p-hydroxybenzenesulfonic acid, n-butyl ester, methylhexahydrophthalic anhydride and tin laurate in a weight ratio of 0.4:0.6:0.1:0.8.
  • Each portion of the antioxidant is a mixture composed of antioxidant 1010, antioxidant 168, antioxidant 2112 and antioxidant 703 in a weight ratio of 0.4:0.8:0.6:0.1.
  • Each part of the defoamer is a mixture composed of polydimethylsiloxane, tributyl phosphate and paraffin in a weight ratio of 0.6:0.8:0.1.
  • Each part of the crosslinking agent is a mixture composed of melamine, polymethylhydrogensiloxane and vinyl triethoxysilane in a weight ratio of 0.6:0.1:0.8.
  • Each portion of the solvent is a mixture composed of acetone, butyl acetate, ethylene oxide and isoamyl acetate in a weight ratio of 0.4:0.6:0.1:0.8.
  • the modified polyolefin adhesive is prepared by the following method:
  • step E3 Add the mixture B and defoamer obtained in step E2 to the mixture A obtained in step E1, mix and heat to 80°C, stir at 250r/min for 60 minutes, add the curing agent, and continue to stir for 40 minutes, and then cool to The filtrate obtained by filtration at room temperature is the modified polyolefin adhesive.
  • the aluminum plastic film for lithium battery packaging is prepared through the following steps:
  • step 4) Then increase the temperature of the oven in step 3) to 80°C for high-temperature curing and molding for 71 hours;
  • step 4) Then the temperature of the oven in step 4) is reduced to 60°C for low-temperature molding for 64 hours to obtain the finished aluminum-plastic film.
  • the aluminum-plastic film comprises a polyurethane fiber layer, an aluminum foil layer and a polypropylene heat-sealing layer from top to bottom, and the aluminum foil layer is attached to the upper surface of the polypropylene heat-sealing layer,
  • the polyurethane fiber is attached to the upper surface of the aluminum foil layer, the polyurethane fiber layer and the aluminum foil layer are attached through a modified polyolefin adhesive, and the aluminum foil layer and the polypropylene heat-sealing layer are attached through a polyurethane adhesive.
  • the polyurethane adhesive is the German Weiss group corner glue COSMOPUR 818C German Weiss polyurethane adhesive
  • the modified polyolefin adhesive includes the following raw materials by weight:
  • the polyolefin is POE 8180 Dow Polyolefin.
  • Each part of the modified epoxy resin includes the following parts by weight of raw materials:
  • the polyurethane prepolymer is a polyurethane prepolymer HC-8799AB produced by Shanghai Crane City Polymer Technology Co., Ltd.; the model of the epoxy resin is epoxy resin E44.
  • the modified epoxy resin is prepared by the following method:
  • step S2 Add polyurethane prepolymer and silica to the mixture A obtained in step S1, heat to 90°C and stir for 25min, then add N,N-dimethylformamide and continue to stir at a rate of 332r/min for 1.5 h. After cooling, a modified epoxy resin is obtained.
  • Each part of the curing agent is a mixture composed of p-hydroxybenzenesulfonic acid, n-butyl ester, methylhexahydrophthalic anhydride and tin laurate in a weight ratio of 0.5:0.7:0.2:0.9.
  • Each portion of the antioxidant is a mixture composed of antioxidant 1010, antioxidant 168, antioxidant 2112 and antioxidant 703 in a weight ratio of 0.5:0.9:0.7:0.2.
  • Each portion of the defoamer is a mixture composed of polydimethylsiloxane, tributyl phosphate and paraffin in a weight ratio of 0.7:0.9:0.2.
  • Each part of the crosslinking agent is a mixture of melamine, polymethylhydrogensiloxane and vinyl triethoxysilane in a weight ratio of 0.7:0.2:0.9.
  • Each portion of the solvent is a mixture composed of acetone, butyl acetate, ethylene oxide and isoamyl acetate in a weight ratio of 0.5:0.7:0.2:0.9.
  • the modified polyolefin adhesive is prepared by the following method:
  • step E3 Add the mixture B and defoamer obtained in step E2 to the mixture A obtained in step E1, mix and heat to 85°C, stir at 275r/min for 68 minutes, add the curing agent, and continue to stir for 45 minutes, and then cool to
  • the filtrate obtained by filtration at room temperature is the modified polyolefin adhesive.
  • the aluminum plastic film for lithium battery packaging is prepared through the following steps:
  • step 4) Then increase the temperature of the oven in step 3) to 83°C for high-temperature curing and molding for 71.5 hours;
  • step 4) Then the temperature of the oven in step 4) is reduced to 63°C for low-temperature molding for 64.5 hours to obtain the finished aluminum-plastic film.
  • the aluminum-plastic film comprises a polyurethane fiber layer, an aluminum foil layer and a polypropylene heat-sealing layer from top to bottom, and the aluminum foil layer is attached to the upper surface of the polypropylene heat-sealing layer,
  • the polyurethane fiber is attached to the upper surface of the aluminum foil layer, the polyurethane fiber layer and the aluminum foil layer are attached through a modified polyolefin adhesive, and the aluminum foil layer and the polypropylene heat-sealing layer are attached through a polyurethane adhesive.
  • the polyurethane adhesive is the German Weiss group corner glue COSMOPUR 818C German Weiss polyurethane adhesive
  • the modified polyolefin adhesive includes the following raw materials by weight:
  • the polyolefin is POE 8180 Dow Polyolefin.
  • Each part of the modified epoxy resin includes the following parts by weight of raw materials:
  • the polyurethane prepolymer is a polyurethane prepolymer HC-8799AB produced by Shanghai Crane City Polymer Technology Co., Ltd.; the model of the epoxy resin is epoxy resin E44.
  • the modified epoxy resin is prepared by the following method:
  • step S2 Add polyurethane prepolymer and silica to the mixture A obtained in step S1, heat to 100°C and stir for 30min, then add N,N-dimethylformamide and continue stirring at a rate of 375r/min for 2h , After cooling, a modified epoxy resin is obtained.
  • Each part of the curing agent is a mixture composed of p-hydroxybenzenesulfonic acid, n-butyl ester, methylhexahydrophthalic anhydride and tin laurate in a weight ratio of 0.6:0.8:0.3:1.0.
  • Each portion of the antioxidant is a mixture composed of antioxidant 1010, antioxidant 168, antioxidant 2112 and antioxidant 703 in a weight ratio of 0.6:1.0:0.8:0.3.
  • Each portion of the defoamer is a mixture composed of polydimethylsiloxane, tributyl phosphate and paraffin in a weight ratio of 0.8:1.0:0.3.
  • Each portion of the crosslinking agent is a mixture composed of melamine, polymethylhydrogensiloxane and vinyl triethoxysilane in a weight ratio of 0.8:0.3:1.0.
  • Each portion of the solvent is a mixture composed of acetone, butyl acetate, ethylene oxide and isoamyl acetate in a weight ratio of 0.6:0.8:0.3:1.0.
  • the modified polyolefin adhesive is prepared by the following method:
  • step E3 Add the mixture B and defoamer obtained in step E2 to the mixture A obtained in step E1, mix and heat to 90°C, stir at 300r/min for 75min, add the curing agent, and continue to stir for 50min, and then cool to The filtrate obtained by filtration at room temperature is the modified polyolefin adhesive.
  • the aluminum plastic film for lithium battery packaging is prepared through the following steps:
  • step 4) Then increase the temperature of the oven in step 3) to 85°C for high-temperature curing and molding for 72 hours;
  • step 5) Then the temperature of the oven in step 4) is lowered to 65° C. and low-temperature forming is performed for 65 hours to obtain the finished aluminum-plastic film.
  • the aluminum-plastic film comprises a polyurethane fiber layer, an aluminum foil layer and a polypropylene heat-sealing layer from top to bottom, and the aluminum foil layer is attached to the upper surface of the polypropylene heat-sealing layer,
  • the polyurethane fiber is attached to the upper surface of the aluminum foil layer, the polyurethane fiber layer and the aluminum foil layer are attached through a modified polyolefin adhesive, and the aluminum foil layer and the polypropylene heat-sealing layer are attached through a polyurethane adhesive.
  • the polyurethane adhesive is the German Weiss group corner glue COSMOPUR 818C German Weiss polyurethane adhesive
  • the modified polyolefin adhesive includes the following raw materials by weight:
  • the polyolefin is POE 8180 Dow Polyolefin.
  • Each part of the modified epoxy resin includes the following parts by weight of raw materials:
  • the polyurethane prepolymer is a polyurethane prepolymer HC-8799AB produced by Shanghai Crane City Polymer Technology Co., Ltd.; the model of the epoxy resin is epoxy resin E44.
  • the modified epoxy resin is prepared by the following method:
  • step S2 Add the polyurethane prepolymer and silica to the mixture A obtained in step S1, heat to 110°C and stir for 35 minutes, then add N,N-dimethylformamide and continue to stir at a rate of 407r/min for 2.5 h. After cooling, a modified epoxy resin is obtained.
  • Each part of the curing agent is a mixture composed of p-hydroxybenzene sulfonic acid, n-butyl ester, methylhexahydrophthalic anhydride and tin laurate in a weight ratio of 0.7:0.9:0.4:1.1.
  • Each portion of the antioxidant is a mixture composed of antioxidant 1010, antioxidant 168, antioxidant 2112 and antioxidant 703 in a weight ratio of 0.7:1.1:0.9:0.4.
  • Each portion of the defoamer is a mixture composed of polydimethylsiloxane, tributyl phosphate and paraffin in a weight ratio of 0.9:1.1:0.4.
  • Each part of the crosslinking agent is a mixture composed of melamine, polymethylhydrogensiloxane and vinyl triethoxysilane in a weight ratio of 0.9:0.4:1.1.
  • Each portion of the solvent is a mixture composed of acetone, butyl acetate, ethylene oxide and isoamyl acetate in a weight ratio of 0.7:0.9:0.4:1.1.
  • the modified polyolefin adhesive is prepared by the following method:
  • step E3 Add the mixture B and defoamer obtained in step E2 to the mixture A obtained in step E1, mix and heat to 95°C, stir at 275r/min for 82 minutes, add the curing agent, and continue to stir for 55 minutes, and then cool to
  • the filtrate obtained by filtration at room temperature is the modified polyolefin adhesive.
  • the aluminum plastic film for lithium battery packaging is prepared through the following steps:
  • step 4) Then increase the temperature of the oven in step 3) to 88°C for high-temperature curing and molding for 72.5 hours;
  • step 4) Then the temperature of the oven in step 4) is lowered to 68°C for low-temperature molding for 65.5 hours to obtain the finished aluminum-plastic film.
  • the aluminum-plastic film comprises a polyurethane fiber layer, an aluminum foil layer and a polypropylene heat-sealing layer from top to bottom, and the aluminum foil layer is attached to the upper surface of the polypropylene heat-sealing layer,
  • the polyurethane fiber is attached to the upper surface of the aluminum foil layer, the polyurethane fiber layer and the aluminum foil layer are attached through a modified polyolefin adhesive, and the aluminum foil layer and the polypropylene heat-sealing layer are attached through a polyurethane adhesive.
  • the polyurethane adhesive is the German Weiss group corner glue COSMOPUR 818C German Weiss polyurethane adhesive
  • the modified polyolefin adhesive includes the following raw materials by weight:
  • the polyolefin is POE 8180 Dow Polyolefin.
  • Each part of the modified epoxy resin includes the following parts by weight of raw materials:
  • the polyurethane prepolymer is a polyurethane prepolymer HC-8799AB produced by Shanghai Crane City Polymer Technology Co., Ltd.; the model of the epoxy resin is epoxy resin E44.
  • the modified epoxy resin is prepared by the following method:
  • step S2 Add polyurethane prepolymer and silica to the mixture A obtained in step S1, heat to 120°C and stir for 40 minutes, then add N,N-dimethylformamide and continue to stir at 450r/min for 3h , After cooling, a modified epoxy resin is obtained.
  • Each part of the curing agent is a mixture composed of p-hydroxybenzenesulfonic acid, n-butyl ester, methylhexahydrophthalic anhydride and tin laurate in a weight ratio of 0.8:1.0:0.5:1.2.
  • Each portion of the antioxidant is a mixture composed of antioxidant 1010, antioxidant 168, antioxidant 2112 and antioxidant 703 in a weight ratio of 0.8:1.2:1.0:0.5.
  • Each portion of the defoamer is a mixture composed of polydimethylsiloxane, tributyl phosphate and paraffin in a weight ratio of 1.0:1.2:0.5.
  • Each portion of the crosslinking agent is a mixture composed of melamine, polymethylhydrogensiloxane and vinyl triethoxysilane in a weight ratio of 1.0:0.5:1.2.
  • Each portion of the solvent is a mixture composed of acetone, butyl acetate, ethylene oxide and isoamyl acetate in a weight ratio of 0.8:1.0:0.5:1.2.
  • the modified polyolefin adhesive is prepared by the following method:
  • step E3 Add the mixture B and defoamer obtained in step E2 to the mixture A obtained in step E1, mix and heat to 100°C, stir at 350r/min for 90 minutes, add the curing agent, and continue to stir for 60 minutes, and then cool to The filtrate obtained by filtration at room temperature is the modified polyolefin adhesive.
  • the aluminum plastic film for lithium battery packaging is prepared through the following steps:
  • step 4) Then increase the temperature of the oven in step 3) to 90°C for high-temperature curing and molding for 73 hours;
  • step 4) Then the temperature of the oven in step 4) is lowered to 70°C for low-temperature molding for 66 hours to obtain the finished aluminum-plastic film.
  • the aluminum-plastic film for lithium battery packaging.
  • the aluminum-plastic film includes a modified polypropylene layer, an aluminum foil layer, and a polypropylene heat-sealing layer from top to bottom.
  • the aluminum foil layer is attached to the polypropylene heat-sealing layer.
  • the modified polypropylene layer is attached to the upper surface of the aluminum foil layer, the modified polypropylene layer and the aluminum foil layer are attached through a modified polyolefin adhesive, and the aluminum foil layer and the polypropylene are heat-sealed
  • the layers are bonded together by a polyurethane adhesive
  • the polyurethane adhesive is the German Weiss group corner glue COSMOPUR 818C German Weiss polyurethane adhesive
  • the modified polyolefin adhesive includes the following raw materials by weight:
  • the polyolefin is POE 8180 Dow Polyolefin.
  • Each part of the modified epoxy resin includes the following parts by weight of raw materials:
  • the polyurethane prepolymer is a polyurethane prepolymer HC-8799AB produced by Shanghai Crane City Polymer Technology Co., Ltd.; the model of the epoxy resin is epoxy resin E44.
  • the modified epoxy resin is prepared by the following method:
  • step S2 Add polyurethane prepolymer and silica to the mixture A obtained in step S1, heat to 80°C and stir for 20min, then add N,N-dimethylformamide and continue to stir at 300r/min for 1h , After cooling, a modified epoxy resin is obtained.
  • Each part of the curing agent is a mixture composed of p-hydroxybenzenesulfonic acid, n-butyl ester, methylhexahydrophthalic anhydride and tin laurate in a weight ratio of 0.4:0.6:0.1:0.8.
  • Each portion of the antioxidant is a mixture composed of antioxidant 1010, antioxidant 168, antioxidant 2112 and antioxidant 703 in a weight ratio of 0.4:0.8:0.6:0.1.
  • Each part of the defoamer is a mixture composed of polydimethylsiloxane, tributyl phosphate and paraffin in a weight ratio of 0.6:0.8:0.1.
  • Each part of the crosslinking agent is a mixture composed of melamine, polymethylhydrogensiloxane and vinyl triethoxysilane in a weight ratio of 0.6:0.1:0.8.
  • Each portion of the solvent is a mixture composed of acetone, butyl acetate, ethylene oxide and isoamyl acetate in a weight ratio of 0.4:0.6:0.1:0.8.
  • the modified polyolefin adhesive is prepared by the following method:
  • step E3 Add the mixture B and defoamer obtained in step E2 to the mixture A obtained in step E1, mix and heat to 80°C, stir at 250r/min for 60 minutes, add the curing agent, and continue to stir for 40 minutes, and then cool to The filtrate obtained by filtration at room temperature is the modified polyolefin adhesive.
  • the aluminum plastic film for lithium battery packaging is prepared through the following steps:
  • step 4) Then increase the temperature of the oven in step 3) to 80°C for high-temperature curing and molding for 71 hours;
  • step 4) Then the temperature of the oven in step 4) is reduced to 60°C for low-temperature molding for 64 hours to obtain the finished aluminum-plastic film.
  • the aluminum-plastic film comprises a polyurethane fiber layer, an aluminum foil layer and a polypropylene heat-sealing layer from top to bottom, and the aluminum foil layer is attached to the upper surface of the polypropylene heat-sealing layer,
  • the polyurethane fiber is attached to the upper surface of the aluminum foil layer, the polyurethane fiber layer and the aluminum foil layer are attached through a modified polyolefin adhesive, and the aluminum foil layer and the polypropylene heat-sealing layer are attached through a polyurethane adhesive.
  • the polyurethane adhesive is the German Weiss group corner glue COSMOPUR 818C German Weiss polyurethane adhesive
  • the modified polyolefin adhesive includes the following raw materials by weight:
  • the polyolefin is POE 8180 Dow Polyolefin.
  • Each part of the curing agent is a mixture composed of p-hydroxybenzenesulfonic acid, n-butyl ester, methylhexahydrophthalic anhydride and tin laurate in a weight ratio of 0.6:0.8:0.3:1.0.
  • Each portion of the antioxidant is a mixture composed of antioxidant 1010, antioxidant 168, antioxidant 2112 and antioxidant 703 in a weight ratio of 0.6:1.0:0.8:0.3.
  • Each portion of the defoamer is a mixture composed of polydimethylsiloxane, tributyl phosphate and paraffin in a weight ratio of 0.8:1.0:0.3.
  • Each portion of the crosslinking agent is a mixture composed of melamine, polymethylhydrogensiloxane and vinyl triethoxysilane in a weight ratio of 0.8:0.3:1.0.
  • Each portion of the solvent is a mixture composed of acetone, butyl acetate, ethylene oxide and isoamyl acetate in a weight ratio of 0.6:0.8:0.3:1.0.
  • the modified polyolefin adhesive is prepared by the following method:
  • step E3 Add the mixture B and defoamer obtained in step E2 to the mixture A obtained in step E1, mix and heat to 90°C, stir at 300r/min for 75min, add the curing agent, and continue to stir for 50min, and then cool to The filtrate obtained by filtration at room temperature is the modified polyolefin adhesive.
  • the aluminum plastic film for lithium battery packaging is prepared through the following steps:
  • step 4) Then increase the temperature of the oven in step 3) to 85°C for high-temperature curing and molding for 72 hours;
  • step 5) Then the temperature of the oven in step 4) is lowered to 65° C. and low-temperature forming is performed for 65 hours to obtain the finished aluminum-plastic film.
  • the aluminum-plastic film comprises a polyurethane fiber layer, an aluminum foil layer and a polypropylene heat-sealing layer from top to bottom, and the aluminum foil layer is attached to the upper surface of the polypropylene heat-sealing layer,
  • the polyurethane fiber is attached to the upper surface of the aluminum foil layer, the polyurethane fiber layer and the aluminum foil layer are attached through a modified polyolefin adhesive, and the aluminum foil layer and the polypropylene heat-sealing layer are attached through a polyurethane adhesive.
  • the polyurethane adhesive is the German Weiss group corner glue COSMOPUR 818C German Weiss polyurethane adhesive
  • the modified polyolefin adhesive includes the following raw materials by weight:
  • the polyolefin is POE 8180 Dow Polyolefin.
  • Each part of the modified epoxy resin includes the following parts by weight of raw materials:
  • the polyurethane prepolymer is a polyurethane prepolymer HC-8799AB produced by Shanghai Crane City Polymer Technology Co., Ltd.; the model of the epoxy resin is epoxy resin E44.
  • the modified epoxy resin is prepared by the following method:
  • step S2 Add polyurethane prepolymer and silica to the mixture A obtained in step S1, heat to 120°C and stir for 40 minutes, then add N,N-dimethylformamide and continue to stir at 450r/min for 3h , After cooling, a modified epoxy resin is obtained.
  • Each part of the curing agent is a mixture composed of p-hydroxybenzenesulfonic acid, n-butyl ester, methylhexahydrophthalic anhydride and tin laurate in a weight ratio of 0.8:1.0:0.5:1.2.
  • Each portion of the antioxidant is a mixture composed of antioxidant 1010, antioxidant 168, antioxidant 2112 and antioxidant 703 in a weight ratio of 0.8:1.2:1.0:0.5.
  • Each portion of the defoamer is a mixture composed of polydimethylsiloxane, tributyl phosphate and paraffin in a weight ratio of 1.0:1.2:0.5.
  • Each portion of the crosslinking agent is a mixture composed of melamine, polymethylhydrogensiloxane and vinyl triethoxysilane in a weight ratio of 1.0:0.5:1.2.
  • Each portion of the solvent is a mixture composed of acetone, butyl acetate, ethylene oxide and isoamyl acetate in a weight ratio of 0.8:1.0:0.5:1.2.
  • the modified polyolefin adhesive is prepared by the following method:
  • step E3 Add the mixture B and defoamer obtained in step E2 to the mixture A obtained in step E1, mix and heat to 100°C, stir at 350r/min for 90 minutes, add the curing agent, and continue to stir for 60 minutes, and then cool to The filtrate obtained by filtration at room temperature is the modified polyolefin adhesive.
  • the aluminum plastic film for lithium battery packaging is prepared through the following steps:
  • step 4) Then increase the temperature of the oven in step 3) to 90°C for high-temperature curing and molding for 73 hours;
  • step 4) Then the temperature of the oven in step 4) is lowered to 70°C for low-temperature molding for 66 hours to obtain the finished aluminum-plastic film.
  • the aluminum-plastic film comprises a polyurethane fiber layer, an aluminum foil layer and a polypropylene heat-sealing layer from top to bottom, and the aluminum foil layer is attached to the upper surface of the polypropylene heat-sealing layer,
  • the polyurethane fiber is attached to the upper surface of the aluminum foil layer, the polyurethane fiber layer and the aluminum foil layer are attached through a modified polyolefin adhesive, and the aluminum foil layer and the polypropylene heat-sealing layer are attached through a polyurethane adhesive.
  • the polyurethane adhesive is the German Weiss group corner glue COSMOPUR 818C German Weiss polyurethane adhesive
  • the modified polyolefin adhesive includes the following raw materials by weight:
  • the polyolefin is POE 8180 Dow Polyolefin.
  • Each part of the modified epoxy resin includes the following parts by weight of raw materials:
  • the polyurethane prepolymer is the polyurethane prepolymer HC-8799AB produced by Shanghai Crane City Polymer Technology Co., Ltd.
  • the modified epoxy resin is prepared by the following method:
  • step S2 Add polyurethane prepolymer and silica to the mixture A obtained in step S1, heat to 120°C and stir for 40 minutes, then add N,N-dimethylformamide and continue to stir at 450r/min for 3h , After cooling, a modified epoxy resin is obtained.
  • Each part of the curing agent is a mixture composed of p-hydroxybenzenesulfonic acid, n-butyl ester, methylhexahydrophthalic anhydride and tin laurate in a weight ratio of 0.8:1.0:0.5:1.2.
  • Each portion of the antioxidant is a mixture composed of antioxidant 1010, antioxidant 168, antioxidant 2112 and antioxidant 703 in a weight ratio of 0.8:1.2:1.0:0.5.
  • Each portion of the defoamer is a mixture composed of polydimethylsiloxane, tributyl phosphate and paraffin in a weight ratio of 1.0:1.2:0.5.
  • Each portion of the crosslinking agent is a mixture composed of melamine, polymethylhydrogensiloxane and vinyl triethoxysilane in a weight ratio of 1.0:0.5:1.2.
  • Each portion of the solvent is a mixture composed of acetone, butyl acetate, ethylene oxide and isoamyl acetate in a weight ratio of 0.8:1.0:0.5:1.2.
  • the modified polyolefin adhesive is prepared by the following method:
  • step E3 Add the mixture B and defoamer obtained in step E2 to the mixture A obtained in step E1, mix and heat to 100°C, stir at 350r/min for 90 minutes, add the curing agent, and continue to stir for 60 minutes, and then cool to The filtrate obtained by filtration at room temperature is the modified polyolefin adhesive.
  • the aluminum plastic film for lithium battery packaging is prepared through the following steps:
  • Example 1 Compared with Example 1, in Comparative Example 1, the modified polypropylene layer was used to replace the polyurethane fiber layer in the preparation of aluminum-plastic film.
  • Various physical properties of the aluminum-plastic film prepared from the above raw materials were tested. The analysis found that the aluminum-plastic film The peeling force, elongation at break, and corrosion resistance of the film are relatively reduced, and the white line and the heat-sealing sol-proof aluminum effect are relatively weakened after the shell is punched; it shows that the polyurethane fiber layer is used in the preparation of the aluminum plastic film, which can make the preparation of the aluminum plastic film.
  • the aluminum-plastic film has good peeling force, elongation at break, and corrosion resistance efficiency.
  • the prepared aluminum-plastic film has a very good Good barrier performance, ductility and internal corrosion.
  • it also has the advantages of good white line after shell flushing and heat-sealing sol-proof aluminum leakage, long service life and low production cost.
  • Example 3 Compared with Example 3, in Comparative Example 2, epoxy resin was used instead of modified epoxy resin when preparing the modified polyolefin adhesive used in the aluminum-plastic film, and various physical properties of the aluminum-plastic film prepared from the above-mentioned raw materials were tested.
  • the analysis found that the peeling force, elongation at break, and corrosion resistance efficiency of the aluminum-plastic film were significantly reduced, and the white line and the heat-sealing sol-proof aluminum effect were relatively weakened after the shell was flushed; it shows that the present invention is used in the preparation of the aluminum-plastic film.
  • Modified epoxy resin is used for polyolefin adhesive, which can make the aluminum plastic film have good peeling force, elongation at break, and corrosion resistance efficiency.
  • the prepared aluminum plastic film has good barrier properties, ductility and internal corrosion.
  • it also has a good white line after the shell is flushed and the heat-sealable aluminum leakage prevention effect. The advantages of long life and low production cost.
  • the anti-leakage effect of aluminum is significantly improved, so that the aluminum-plastic film has good barrier properties, ductility and internal corrosion. In addition, it also has good white line after shell flushing and heat-sealing sol-proof aluminum leakage. And the advantages of long service life and low production cost.
  • Example 5 Compared with Example 5, in Comparative Example 4, the prior art low-temperature 40°C constant-temperature curing molding was used in the process of preparing aluminum-plastic film, and various physical property tests were performed on the aluminum-plastic film prepared by the above process, and the analysis found this
  • the peeling force, elongation at break, and corrosion resistance efficiency of the aluminum-plastic film are relatively reduced, and the white line and the heat-sealing sol-proof aluminum leak-proof effect are significantly weakened after the shell is punched; it shows that the present invention adopts the existing high Low-temperature aging and molding can make the prepared aluminum plastic film have good peeling force, elongation at break, and corrosion resistance efficiency.
  • the prepared aluminum-plastic film has good barrier properties, ductility and internal corrosion.
  • it also has good white line after shell flushing and heat-sealing sol-proof aluminum leakage, as well as long service life and low production cost. advantage.

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Abstract

一种锂电池封装用铝塑膜及其制备方法，从上到下包括聚氨酯纤维层、铝箔层和聚丙烯热封层，铝箔层贴合于聚丙烯热封层上，聚氨酯纤维贴合于铝箔层上，聚氨酯纤维层与铝箔层之间通过改性聚烯烃胶粘剂贴合，铝箔层与聚丙烯热封层之间通过聚氨酯胶粘剂贴合，改性聚烯烃胶粘剂包括如下重量份的原料：α-甲基苯乙烯二聚体1-5份、过氧化二苯甲酰1-3份、改性环氧树脂15-25份、聚烯烃20-30份、固化剂1-5份、抗氧剂0.5-3份、消泡剂1-3份、交联剂1-5份和溶剂20-40份。该铝塑膜具有优异的阻隔性能、延展性能及耐腐蚀性能，同时还具有良好的热封溶胶性防漏铝作用。

Description

一种锂电池封装用铝塑膜及其制备方法 技术领域
本发明涉及锂电池封装软包材料技术领域，具体涉及一种锂电池封装用铝塑膜及其制备方法。
背景技术
近年来，新能源行业的迅猛发展，使得软包锂电池的应用量急剧增长。使用铝塑膜包装的软包锂电池具有形状灵活、安全性能好、能量密度高的特点，大大提高了电池设计的灵活性和应用性，从而可以配合产品需求，做成多种形状与容量的电池，为开发商在电源解决方案上提供了较高的设计灵活性和适应性。目前，主流数码产品和电动车辆主要使用软包锂电池，但是，普通的铝塑膜并不能满足聚合物锂电池包装材料性能的要求，在聚合物锂离子电池中通常要求其包装材料具有极高的阻隔性、良好的冷冲压成型性、耐穿刺性、耐电解液稳定性及绝缘热封性能等，另外，目前采用的低温40℃恒温熟化成型工艺制得的铝塑膜存在着铝塑膜冲壳后白线不良、溶胶性不良以及剥离力偏低的问题。
发明内容
为了克服现有技术中存在的缺点和不足，本发明的目的在于提供一种锂电池封装用铝塑膜，该铝塑膜具有优异的阻隔性能、延展性能及耐腐蚀性能，同时还具有良好的热封溶胶性防漏铝作用。
本发明的另一目的在于提供一种锂电池封装用铝塑膜的制备方法，该方法采用高低温熟化工艺使制得的铝塑膜克服了以往采用低温40℃恒温熟化成型制得铝塑膜冲壳后白线不良、溶胶性不良以及剥离力偏低的问题。
本发明的目的通过下述技术方案实现：一种锂电池封装用铝塑膜，该铝塑膜从上到下包括聚氨酯纤维层、铝箔层和聚丙烯热封层，所述铝箔层贴合于所述聚丙烯热封层的上表面，所述聚氨酯纤维贴合于所述铝箔层的上表面，所述聚氨酯纤维层与铝箔层之间通过改性聚烯烃胶粘剂贴合，所述铝箔层与聚丙烯热封层之间通过聚氨酯胶粘剂贴合，所述聚氨酯胶粘剂为德国卫仕组角胶COSMOPUR 818C德国卫士聚氨酯胶粘剂；所述改性聚烯烃胶粘剂包括如下重量份的原料：
Figure PCTCN2020131551-appb-000001
所述聚烯烃为POE 8180美国陶氏聚烯烃。
本发明中的铝塑膜是由从上到下依次贴合的聚氨酯纤维层、铝箔层和聚丙烯热封层制得，并限定聚氨酯纤维层与铝箔层之间通过改性聚烯烃胶粘剂贴合，铝箔层与聚丙烯热封层之间通过聚氨酯胶粘剂贴合，使制得的铝塑膜具有优异的阻隔性能、延展性能及耐腐蚀性能，同时还具有良好的热封溶胶性防漏铝作用，以及放置冲壳后白线情况。而采用的聚氨酯纤维层可以有效防止空气尤其是氧的渗透，维持电池内部的环境，同时可以保证包装铝箔具备良好的形变能力；铝箔层的设置可以有效阻止空气中水分的渗透，维持电池内部的结构，具有一定的厚度及强度，能够防止外力对电芯的损伤；而设置的聚丙烯热封层不会被电芯内有机溶剂溶解、腐蚀及溶胀等，是电芯内部环境最直接的包装保护、绝缘、有效阻止内部电解质与铝箔层接触，避免铝箔层被腐蚀。另外，改性聚烯烃胶粘剂中采用的α-甲基苯乙烯二聚体以线性二聚体作分子链转移剂，可以使得到的改性聚烯烃胶粘剂具有良好的粘接性、抗起泡性、光洁度、表面强度和易印刷性；而过氧化二苯甲酰作为胶粘剂的引发剂是利用氧化剂和还原剂之间的电子转移所生成的自由基引发聚合反应，可以提高制备改性聚烯烃胶粘剂的反应速率，降低能耗；而聚烯烃表面能低、结晶度高、极性弱和粘度差的特点，因而需要采用上述原料和工艺进行改性来提升其粘结性能。
优选的，每份所述改性环氧树脂包括如下重量份的原料：
Figure PCTCN2020131551-appb-000002
所述改性环氧树脂通过如下方法制得：
S1、按照重量份，将环氧树脂、三聚氰胺和石墨烯加入搅拌装置中加热至60-80℃，以200-300r/min的速率搅拌30-60min，得到混合物A，备用；
S2、将聚氨酯预聚体和二氧化硅加入步骤S1中得到的混合物A中，加热至80-120℃搅拌20-40min，再将N，N-二甲基甲酰胺加入并继续以300-450r/min的速率搅拌1-3h，冷却后得到改性环氧树脂。
本发明中采用上述原料和工艺改性后改性环氧树脂具有很好的耐磨性能、抗划伤性能和抗拉伸性能。N，N二甲基甲酰胺作为有机溶剂可以很好与三聚氰胺一起将二氧化硅和石墨烯溶分散到环氧树脂对环氧树脂进行填充改性；而聚氨酯预聚体可作为改性环氧树脂中具有胶粘功能的主体成分，在改性聚烯烃胶粘剂的制备过程中辅助提升了改性聚烯烃胶粘剂的粘接性能、延展性和阻隔性能；另外，在制备改性环氧树脂的过程中需要严格控制步骤S1中的搅拌速率为200-300r/min，若搅拌速率过快则会导致石墨烯由于离心力过大与环氧树脂、三聚氰胺之间的分散效果不佳，若搅拌速率过低则同样不利于石墨烯与环氧树脂、三聚氰胺之间的分散，进而不利于石墨烯对环氧树脂的改性。
优选的，每份所述固化剂为对羟基苯磺酸、正丁酯、甲基六氢苯酐和月桂酸锡中的至少一种；更为优选的，所述固化剂是由对羟基苯磺酸、正丁酯、甲基六氢苯酐和月桂酸锡按照重量比为0.4-0.8:0.6-1.0:0.1-0.5:0.8-1.2组成的混合物。每份所述抗氧剂为抗氧剂1010、抗氧剂168、抗氧剂619、抗氧剂703、抗氧剂BHT、抗氧剂2112和抗氧剂703中的至少一种；优选的，所述抗氧剂是由抗氧剂1010、抗氧剂168、抗氧剂2112和抗氧剂703按照重量比为0.4-0.8:0.8-1.2:0.6-1.0:0.1-0.5组成的混合物。
本发明中所述固化剂采用的对羟基苯磺酸用于改性聚烯烃胶粘剂固化的同时也具有乳化的作用，通过协同对羟基苯磺酸、正丁酯、甲基六氢苯酐和月桂酸锡四者各自的优势进一步提升了固化剂在制备改性聚烯烃胶粘剂过程中的固化作用，进而使制得的改性聚烯烃胶粘剂具有很好的涂敷效果。而所采用的抗氧剂1010对改性环氧树脂和聚烯烃有卓越的抗氧化性能，抗氧剂1010能有效地防止改性聚烯烃胶粘剂在长期老化过程中的热氧化降解，进而延长本发明中铝塑膜的使用期限，另外可以与抗氧剂168并用有协同效应；抗氧剂168、抗氧剂2112和抗氧剂703为抗氧剂1010的辅助抗氧剂，与主抗氧剂1010复配，有很好的协同效应，可有效地防止改性环氧树脂和聚烯烃在基础注塑中的热降解，给改性聚烯烃胶粘剂额外的长效保护。
优选的，每份所述消泡剂为聚二甲基硅氧烷、磷酸三丁酯和石蜡中的至少一种；更为优选的，所述消泡剂是由聚二甲基硅氧烷、磷酸三丁酯和石蜡按照重量比为0.6-1.0:0.8-1.2:0.1-0.5组成的混合物。每份所述交联剂为三聚氰胺、聚甲基氢硅氧烷和乙烯基三乙氧硅烷按照重量比为0.6-1.0:0.1-0.5:0.8-1.2组成的混合物。每份所述溶剂为丙酮、乙酸丁酯、环氧乙烷和乙酸异戊酯中的至少一种；更为优选的，所述溶剂是由丙酮、乙酸丁酯、环氧乙烷和乙酸异戊酯按照重量比为0.4-0.8:0.6-1.0:0.1-0.5:0.8-1.2组成的混合物。
本发明中所述消泡剂可以去除改性聚烯烃胶粘剂制备过程中夹带入空气形成气泡或者因为反应产生气泡，避免影响改性聚烯烃胶粘剂在聚氨酯纤维层与铝箔层之间的粘合效果，进而影响铝塑膜产品质量；所述交联剂采用的聚甲基氢硅氧烷分子中直接与硅原子相连接的活性氢原子与改性环氧树脂、改性环氧树脂—聚烯烃中的乙烯基进行加成反应 使生胶硫化，通常一个分子中至少有3个以上的Si-H基团，方可使硫化胶网状结构的柔顺性和物理机械性能得到明显提高；而所采用的溶剂对上述各原料具有很好的溶解作用，便于各原料之间的融合扩散，可以很好的提升制备改性聚烯烃胶粘剂的效率。
优选的，所述改性聚烯烃胶粘剂通过如下方法制得：
E1、按照重量份，将改性环氧树脂、聚烯烃和过氧化二苯甲酰分散到溶剂中并加入反应装置中，加热至80-100℃，并以350-450r/min搅拌20-40min，得到混合物A，备用；
E2、将α-甲基苯乙烯二聚体、交联剂和抗氧剂混合，加热至40-60℃并搅拌均匀，得到混合物B，备用；
E3、将步骤E2中得到的混合物B和消泡剂加入步骤E1中得到的混合物A中混合加热至80-100℃，以250-350r/min搅拌60-90min，再将固化剂加入，并继续搅拌40-60min，之后冷却至常温过滤得到的滤液即为该改性聚烯烃胶粘剂。
本发明中所述改性聚烯烃胶粘剂通过采用上述方法制得，利用上述方法制得的改性聚烯烃胶粘剂具有很好的粘接性、光洁度、表面强度、耐溶剂和耐酸的特性，通过将本发明提供的改性聚烯烃胶粘剂涂布在聚丙烯热封层表面上，形成内层改性聚烯烃胶粘剂层，再将带有内层改性聚烯烃胶粘剂层聚丙烯热封层与铝箔层进行干式复合，增加了铝塑膜的耐电解液性能。而在制备改性聚烯烃胶粘剂时需要严格控制步骤E1的加热温度为80-100℃，若温度过高则会导致过氧化二苯甲酰的引发作用受限，不利于后续改性环氧树脂和烯烃与其他助剂之间的反应，若温度过低则会导致体系的布朗运动下降，不利于各原料之间的分散复合；另外还需要控制步骤E3中的搅拌速率为250-350r/min，若搅拌速率过快则会导致体系内部夹杂更多气泡，不利于后续消泡，进而影响制得改性聚烯烃胶粘剂的品质，最终影响到制得的铝塑膜的品质，若搅拌速率过低则不利于消泡剂与混合体系之间的扩散，进而不利于对最终制得改性聚烯烃胶粘剂进行消泡处理。
本发明还提供了一种锂电池封装用铝塑膜的制备方法，包括如下步骤：
1)取聚丙烯热封层，在聚丙烯热封层的上表面贴敷一层聚氨酯胶粘剂再将铝箔层贴合于聚氨酯胶粘剂层上；
2)在铝箔层上表面贴敷一层改性聚烯烃胶粘剂再将聚氨酯纤维层贴合于改性聚烯烃胶粘剂层上，得到铝塑膜初品；
3)将铝塑膜初品放置在烘箱内加热至60-70℃进行熟化成型4.5-5.5h；
4)再将步骤3)中烘箱的温度加至80-90℃进行高温熟化成型71-73h；
5)再将步骤4)中烘箱的温度降至60-70℃进行低温成型64-66h后得到铝塑膜成品。
本发明中的所述铝塑膜通过上述方法制得，利用上述方法制得的铝塑膜具有优异的阻隔性能、热封性能、延展性能及耐腐蚀性能；该方法采用高低温熟化工艺使制得的铝塑膜克服了以往采用低温40℃恒温熟化成型制得铝塑膜冲壳后白线不良、溶胶性不良以及剥离力偏低的问题；而在上述方法中需要养控制步骤3)、步骤4)和步骤5)中的加热温度，使其形成高低温熟化工艺。
本发明的有益效果在于：本发明的铝塑膜具有优异的阻隔性能、热封性能、延展性能及耐腐蚀性能。通过改性聚烯烃胶粘剂涂布在聚丙烯热封层表面上，形成内层改性聚烯烃胶粘剂层，再将带有内层改性聚烯烃胶粘剂层聚丙烯热封层与铝箔层进行干式复合，增 加了铝塑膜的耐电解液性能。而采用的聚氨酯纤维层可以有效防止空气尤其是氧的渗透，维持电池内部的环境，同时可以保证包装铝箔具备良好的形变能力；铝箔层的设置可以有效阻止空气中水分的渗透，维持电池内部的结构，具有一定的厚度及强度，能够防止外力对电芯的损伤；而设置的聚丙烯热封层不会被电芯内有机溶剂溶解、腐蚀及溶胀等，是电芯内部环境最直接的包装保护、绝缘、有效阻止内部电解质与铝箔层接触，避免铝箔层被腐蚀。
本发明一种锂电池封装用铝塑膜的制备方法简单高效，操作控制方便，生产的产品质量高，利于工业化生产。
具体实施方式
为了便于本领域技术人员的理解，下面结合实施例对本发明作进一步的说明，实施方式提及的内容并非对本发明的限定。
实施例1
一种锂电池封装用铝塑膜，该铝塑膜从上到下包括聚氨酯纤维层、铝箔层和聚丙烯热封层，所述铝箔层贴合于所述聚丙烯热封层的上表面，所述聚氨酯纤维贴合于所述铝箔层的上表面，所述聚氨酯纤维层与铝箔层之间通过改性聚烯烃胶粘剂贴合，所述铝箔层与聚丙烯热封层之间通过聚氨酯胶粘剂贴合，所述聚氨酯胶粘剂为德国卫仕组角胶COSMOPUR 818C德国卫士聚氨酯胶粘剂；所述改性聚烯烃胶粘剂包括如下重量份的原料：
Figure PCTCN2020131551-appb-000003
所述聚烯烃为POE 8180美国陶氏聚烯烃。
每份所述改性环氧树脂包括如下重量份的原料：
Figure PCTCN2020131551-appb-000004
所述聚氨酯预聚体为上海鹤城高分子科技有限公司生产的聚氨酯预聚体HC-8799AB；所述环氧树脂的型号为环氧树脂E44。
所述改性环氧树脂通过如下方法制得：
S1、按照重量份，将环氧树脂、三聚氰胺和石墨烯加入搅拌装置中加热至60℃，以200r/min的速率搅拌30min，得到混合物A，备用；
S2、将聚氨酯预聚体和二氧化硅加入步骤S1中得到的混合物A中，加热至80℃搅拌20min，再将N，N-二甲基甲酰胺加入并继续以300r/min的速率搅拌1h，冷却后得到改性环氧树脂。
每份所述固化剂是由对羟基苯磺酸、正丁酯、甲基六氢苯酐和月桂酸锡按照重量比为0.4:0.6:0.1:0.8组成的混合物。
每份所述抗氧剂是由抗氧剂1010、抗氧剂168、抗氧剂2112和抗氧剂703按照重量比为0.4:0.8:0.6:0.1组成的混合物。
每份所述消泡剂是由聚二甲基硅氧烷、磷酸三丁酯和石蜡按照重量比为0.6:0.8:0.1组成的混合物。
每份所述交联剂为三聚氰胺、聚甲基氢硅氧烷和乙烯基三乙氧硅烷按照重量比为0.6:0.1:0.8组成的混合物。
每份所述溶剂是由丙酮、乙酸丁酯、环氧乙烷和乙酸异戊酯按照重量比为0.4:0.6:0.1:0.8组成的混合物。
所述改性聚烯烃胶粘剂通过如下方法制得：
E1、按照重量份，将改性环氧树脂、聚烯烃和过氧化二苯甲酰分散到溶剂中并加入反应装置中，加热至80℃，并以350r/min搅拌20min，得到混合物A，备用；
E2、将α-甲基苯乙烯二聚体、交联剂和抗氧剂混合，加热至40℃并搅拌均匀，得到混合物B，备用；
E3、将步骤E2中得到的混合物B和消泡剂加入步骤E1中得到的混合物A中混合加热至80℃，以250r/min搅拌60min，再将固化剂加入，并继续搅拌40min，之后冷却至常温过滤得到的滤液即为该改性聚烯烃胶粘剂。
所述锂电池封装用铝塑膜通过如下步骤制得：
1)取聚丙烯热封层，在聚丙烯热封层的上表面贴敷一层聚氨酯胶粘剂再将铝箔层贴合于聚氨酯胶粘剂层上；
2)在铝箔层上表面贴敷一层改性聚烯烃胶粘剂再将聚氨酯纤维层贴合于改性聚 烯烃胶粘剂层上，得到铝塑膜初品；
3)将铝塑膜初品放置在烘箱内加热至60℃进行熟化成型4.5h；
4)再将步骤3)中烘箱的温度加至80℃进行高温熟化成型71h；
5)再将步骤4)中烘箱的温度降至60℃进行低温成型64h后得到铝塑膜成品。
实施例2
一种锂电池封装用铝塑膜，该铝塑膜从上到下包括聚氨酯纤维层、铝箔层和聚丙烯热封层，所述铝箔层贴合于所述聚丙烯热封层的上表面，所述聚氨酯纤维贴合于所述铝箔层的上表面，所述聚氨酯纤维层与铝箔层之间通过改性聚烯烃胶粘剂贴合，所述铝箔层与聚丙烯热封层之间通过聚氨酯胶粘剂贴合，所述聚氨酯胶粘剂为德国卫仕组角胶COSMOPUR 818C德国卫士聚氨酯胶粘剂；所述改性聚烯烃胶粘剂包括如下重量份的原料：
Figure PCTCN2020131551-appb-000005
所述聚烯烃为POE 8180美国陶氏聚烯烃。
每份所述改性环氧树脂包括如下重量份的原料：
Figure PCTCN2020131551-appb-000006
所述聚氨酯预聚体为上海鹤城高分子科技有限公司生产的聚氨酯预聚体HC-8799AB；所述环氧树脂的型号为环氧树脂E44。
所述改性环氧树脂通过如下方法制得：
S1、按照重量份，将环氧树脂、三聚氰胺和石墨烯加入搅拌装置中加热至65℃，以 225r/min的速率搅拌38min，得到混合物A，备用；
S2、将聚氨酯预聚体和二氧化硅加入步骤S1中得到的混合物A中，加热至90℃搅拌25min，再将N，N-二甲基甲酰胺加入并继续以332r/min的速率搅拌1.5h，冷却后得到改性环氧树脂。
每份所述固化剂是由对羟基苯磺酸、正丁酯、甲基六氢苯酐和月桂酸锡按照重量比为0.5:0.7:0.2:0.9组成的混合物。
每份所述抗氧剂是由抗氧剂1010、抗氧剂168、抗氧剂2112和抗氧剂703按照重量比为0.5:0.9:0.7:0.2组成的混合物。
每份所述消泡剂是由聚二甲基硅氧烷、磷酸三丁酯和石蜡按照重量比为0.7:0.9:0.2组成的混合物。
每份所述交联剂为三聚氰胺、聚甲基氢硅氧烷和乙烯基三乙氧硅烷按照重量比为0.7:0.2:0.9组成的混合物。
每份所述溶剂是由丙酮、乙酸丁酯、环氧乙烷和乙酸异戊酯按照重量比为0.5:0.7:0.2:0.9组成的混合物。
所述改性聚烯烃胶粘剂通过如下方法制得：
E1、按照重量份，将改性环氧树脂、聚烯烃和过氧化二苯甲酰分散到溶剂中并加入反应装置中，加热至85℃，并以375r/min搅拌25min，得到混合物A，备用；
E2、将α-甲基苯乙烯二聚体、交联剂和抗氧剂混合，加热至45℃并搅拌均匀，得到混合物B，备用；
E3、将步骤E2中得到的混合物B和消泡剂加入步骤E1中得到的混合物A中混合加热至85℃，以275r/min搅拌68min，再将固化剂加入，并继续搅拌45min，之后冷却至常温过滤得到的滤液即为该改性聚烯烃胶粘剂。
所述锂电池封装用铝塑膜通过如下步骤制得：
1)取聚丙烯热封层，在聚丙烯热封层的上表面贴敷一层聚氨酯胶粘剂再将铝箔层贴合于聚氨酯胶粘剂层上；
2)在铝箔层上表面贴敷一层改性聚烯烃胶粘剂再将聚氨酯纤维层贴合于改性聚烯烃胶粘剂层上，得到铝塑膜初品；
3)将铝塑膜初品放置在烘箱内加热至63℃进行熟化成型4.75h；
4)再将步骤3)中烘箱的温度加至83℃进行高温熟化成型71.5h；
5)再将步骤4)中烘箱的温度降至63℃进行低温成型64.5h后得到铝塑膜成品。
实施例3
一种锂电池封装用铝塑膜，该铝塑膜从上到下包括聚氨酯纤维层、铝箔层和聚丙烯热封层，所述铝箔层贴合于所述聚丙烯热封层的上表面，所述聚氨酯纤维贴合于所述铝箔层的上表面，所述聚氨酯纤维层与铝箔层之间通过改性聚烯烃胶粘剂贴合，所述铝箔层与聚丙烯热封层之间通过聚氨酯胶粘剂贴合，所述聚氨酯胶粘剂为德国卫仕组角胶COSMOPUR 818C德国卫士聚氨酯胶粘剂；所述改性聚烯烃胶粘剂包括如下重量份的原料：
Figure PCTCN2020131551-appb-000007
所述聚烯烃为POE 8180美国陶氏聚烯烃。
每份所述改性环氧树脂包括如下重量份的原料：
Figure PCTCN2020131551-appb-000008
所述聚氨酯预聚体为上海鹤城高分子科技有限公司生产的聚氨酯预聚体HC-8799AB；所述环氧树脂的型号为环氧树脂E44。
所述改性环氧树脂通过如下方法制得：
S1、按照重量份，将环氧树脂、三聚氰胺和石墨烯加入搅拌装置中加热至70℃，以250r/min的速率搅拌45min，得到混合物A，备用；
S2、将聚氨酯预聚体和二氧化硅加入步骤S1中得到的混合物A中，加热至100℃搅拌30min，再将N，N-二甲基甲酰胺加入并继续以375r/min的速率搅拌2h，冷却后得到改性环氧树脂。
每份所述固化剂是由对羟基苯磺酸、正丁酯、甲基六氢苯酐和月桂酸锡按照重量比为0.6:0.8:0.3:1.0组成的混合物。
每份所述抗氧剂是由抗氧剂1010、抗氧剂168、抗氧剂2112和抗氧剂703按照重量比为0.6:1.0:0.8:0.3组成的混合物。
每份所述消泡剂是由聚二甲基硅氧烷、磷酸三丁酯和石蜡按照重量比为0.8:1.0:0.3组成的混合物。
每份所述交联剂为三聚氰胺、聚甲基氢硅氧烷和乙烯基三乙氧硅烷按照重量比为 0.8:0.3:1.0组成的混合物。
每份所述溶剂是由丙酮、乙酸丁酯、环氧乙烷和乙酸异戊酯按照重量比为0.6:0.8:0.3:1.0组成的混合物。
所述改性聚烯烃胶粘剂通过如下方法制得：
E1、按照重量份，将改性环氧树脂、聚烯烃和过氧化二苯甲酰分散到溶剂中并加入反应装置中，加热至90℃，并以400r/min搅拌30min，得到混合物A，备用；
E2、将α-甲基苯乙烯二聚体、交联剂和抗氧剂混合，加热至50℃并搅拌均匀，得到混合物B，备用；
E3、将步骤E2中得到的混合物B和消泡剂加入步骤E1中得到的混合物A中混合加热至90℃，以300r/min搅拌75min，再将固化剂加入，并继续搅拌50min，之后冷却至常温过滤得到的滤液即为该改性聚烯烃胶粘剂。
所述锂电池封装用铝塑膜通过如下步骤制得：
1)取聚丙烯热封层，在聚丙烯热封层的上表面贴敷一层聚氨酯胶粘剂再将铝箔层贴合于聚氨酯胶粘剂层上；
2)在铝箔层上表面贴敷一层改性聚烯烃胶粘剂再将聚氨酯纤维层贴合于改性聚烯烃胶粘剂层上，得到铝塑膜初品；
3)将铝塑膜初品放置在烘箱内加热至65℃进行熟化成型5.0h；
4)再将步骤3)中烘箱的温度加至85℃进行高温熟化成型72h；
5)再将步骤4)中烘箱的温度降至65℃进行低温成型65h后得到铝塑膜成品。
实施例4
一种锂电池封装用铝塑膜，该铝塑膜从上到下包括聚氨酯纤维层、铝箔层和聚丙烯热封层，所述铝箔层贴合于所述聚丙烯热封层的上表面，所述聚氨酯纤维贴合于所述铝箔层的上表面，所述聚氨酯纤维层与铝箔层之间通过改性聚烯烃胶粘剂贴合，所述铝箔层与聚丙烯热封层之间通过聚氨酯胶粘剂贴合，所述聚氨酯胶粘剂为德国卫仕组角胶COSMOPUR 818C德国卫士聚氨酯胶粘剂；所述改性聚烯烃胶粘剂包括如下重量份的原料：
Figure PCTCN2020131551-appb-000009
所述聚烯烃为POE 8180美国陶氏聚烯烃。
每份所述改性环氧树脂包括如下重量份的原料：
Figure PCTCN2020131551-appb-000010
所述聚氨酯预聚体为上海鹤城高分子科技有限公司生产的聚氨酯预聚体HC-8799AB；所述环氧树脂的型号为环氧树脂E44。
所述改性环氧树脂通过如下方法制得：
S1、按照重量份，将环氧树脂、三聚氰胺和石墨烯加入搅拌装置中加热至75℃，以275r/min的速率搅拌52min，得到混合物A，备用；
S2、将聚氨酯预聚体和二氧化硅加入步骤S1中得到的混合物A中，加热至110℃搅拌35min，再将N，N-二甲基甲酰胺加入并继续以407r/min的速率搅拌2.5h，冷却后得到改性环氧树脂。
每份所述固化剂是由对羟基苯磺酸、正丁酯、甲基六氢苯酐和月桂酸锡按照重量比为0.7:0.9:0.4:1.1组成的混合物。
每份所述抗氧剂是由抗氧剂1010、抗氧剂168、抗氧剂2112和抗氧剂703按照重量比为0.7:1.1:0.9:0.4组成的混合物。
每份所述消泡剂是由聚二甲基硅氧烷、磷酸三丁酯和石蜡按照重量比为0.9:1.1:0.4组成的混合物。
每份所述交联剂为三聚氰胺、聚甲基氢硅氧烷和乙烯基三乙氧硅烷按照重量比为0.9:0.4:1.1组成的混合物。
每份所述溶剂是由丙酮、乙酸丁酯、环氧乙烷和乙酸异戊酯按照重量比为0.7:0.9:0.4:1.1组成的混合物。
所述改性聚烯烃胶粘剂通过如下方法制得：
E1、按照重量份，将改性环氧树脂、聚烯烃和过氧化二苯甲酰分散到溶剂中并加入反应装置中，加热至95℃，并以425r/min搅拌35min，得到混合物A，备用；
E2、将α-甲基苯乙烯二聚体、交联剂和抗氧剂混合，加热至55℃并搅拌均匀，得到混合物B，备用；
E3、将步骤E2中得到的混合物B和消泡剂加入步骤E1中得到的混合物A中混合加热至95℃，以275r/min搅拌82min，再将固化剂加入，并继续搅拌55min，之后冷却至常温过滤得到的滤液即为该改性聚烯烃胶粘剂。
所述锂电池封装用铝塑膜通过如下步骤制得：
1)取聚丙烯热封层，在聚丙烯热封层的上表面贴敷一层聚氨酯胶粘剂再将铝箔层贴合于聚氨酯胶粘剂层上；
2)在铝箔层上表面贴敷一层改性聚烯烃胶粘剂再将聚氨酯纤维层贴合于改性聚烯烃胶粘剂层上，得到铝塑膜初品；
3)将铝塑膜初品放置在烘箱内加热至68℃进行熟化成型5.25h；
4)再将步骤3)中烘箱的温度加至88℃进行高温熟化成型72.5h；
5)再将步骤4)中烘箱的温度降至68℃进行低温成型65.5h后得到铝塑膜成品。
实施例5
一种锂电池封装用铝塑膜，该铝塑膜从上到下包括聚氨酯纤维层、铝箔层和聚丙烯热封层，所述铝箔层贴合于所述聚丙烯热封层的上表面，所述聚氨酯纤维贴合于所述铝箔层的上表面，所述聚氨酯纤维层与铝箔层之间通过改性聚烯烃胶粘剂贴合，所述铝箔层与聚丙烯热封层之间通过聚氨酯胶粘剂贴合，所述聚氨酯胶粘剂为德国卫仕组角胶COSMOPUR 818C德国卫士聚氨酯胶粘剂；所述改性聚烯烃胶粘剂包括如下重量份的原料：
Figure PCTCN2020131551-appb-000011
所述聚烯烃为POE 8180美国陶氏聚烯烃。
每份所述改性环氧树脂包括如下重量份的原料：
Figure PCTCN2020131551-appb-000012
所述聚氨酯预聚体为上海鹤城高分子科技有限公司生产的聚氨酯预聚体HC-8799AB；所述环氧树脂的型号为环氧树脂E44。
所述改性环氧树脂通过如下方法制得：
S1、按照重量份，将环氧树脂、三聚氰胺和石墨烯加入搅拌装置中加热至80℃，以 300r/min的速率搅拌60min，得到混合物A，备用；
S2、将聚氨酯预聚体和二氧化硅加入步骤S1中得到的混合物A中，加热至120℃搅拌40min，再将N，N-二甲基甲酰胺加入并继续以450r/min的速率搅拌3h，冷却后得到改性环氧树脂。
每份所述固化剂是由对羟基苯磺酸、正丁酯、甲基六氢苯酐和月桂酸锡按照重量比为0.8:1.0:0.5:1.2组成的混合物。
每份所述抗氧剂是由抗氧剂1010、抗氧剂168、抗氧剂2112和抗氧剂703按照重量比为0.8:1.2:1.0:0.5组成的混合物。
每份所述消泡剂是由聚二甲基硅氧烷、磷酸三丁酯和石蜡按照重量比为1.0:1.2:0.5组成的混合物。
每份所述交联剂为三聚氰胺、聚甲基氢硅氧烷和乙烯基三乙氧硅烷按照重量比为1.0:0.5:1.2组成的混合物。
每份所述溶剂是由丙酮、乙酸丁酯、环氧乙烷和乙酸异戊酯按照重量比为0.8:1.0:0.5:1.2组成的混合物。
所述改性聚烯烃胶粘剂通过如下方法制得：
E1、按照重量份，将改性环氧树脂、聚烯烃和过氧化二苯甲酰分散到溶剂中并加入反应装置中，加热至100℃，并以450r/min搅拌40min，得到混合物A，备用；
E2、将α-甲基苯乙烯二聚体、交联剂和抗氧剂混合，加热至60℃并搅拌均匀，得到混合物B，备用；
E3、将步骤E2中得到的混合物B和消泡剂加入步骤E1中得到的混合物A中混合加热至100℃，以350r/min搅拌90min，再将固化剂加入，并继续搅拌60min，之后冷却至常温过滤得到的滤液即为该改性聚烯烃胶粘剂。
所述锂电池封装用铝塑膜通过如下步骤制得：
1)取聚丙烯热封层，在聚丙烯热封层的上表面贴敷一层聚氨酯胶粘剂再将铝箔层贴合于聚氨酯胶粘剂层上；
2)在铝箔层上表面贴敷一层改性聚烯烃胶粘剂再将聚氨酯纤维层贴合于改性聚烯烃胶粘剂层上，得到铝塑膜初品；
3)将铝塑膜初品放置在烘箱内加热至70℃进行熟化成型5.5h；
4)再将步骤3)中烘箱的温度加至90℃进行高温熟化成型73h；
5)再将步骤4)中烘箱的温度降至70℃进行低温成型66h后得到铝塑膜成品。
对比例1
一种锂电池封装用铝塑膜，该铝塑膜从上到下包括改性聚丙烯层、铝箔层和聚丙烯热封层，所述铝箔层贴合于所述聚丙烯热封层的上表面，所述改性聚丙烯层贴合于所述铝箔层的上表面，所述改性聚丙烯层与铝箔层之间通过改性聚烯烃胶粘剂贴合，所述铝箔层与聚丙烯热封层之间通过聚氨酯胶粘剂贴合，所述聚氨酯胶粘剂为德国卫仕组角胶COSMOPUR 818C德国卫士聚氨酯胶粘剂；所述改性聚烯烃胶粘剂包括如下重量份的原料：
Figure PCTCN2020131551-appb-000013
所述聚烯烃为POE 8180美国陶氏聚烯烃。
每份所述改性环氧树脂包括如下重量份的原料：
Figure PCTCN2020131551-appb-000014
所述聚氨酯预聚体为上海鹤城高分子科技有限公司生产的聚氨酯预聚体HC-8799AB；所述环氧树脂的型号为环氧树脂E44。
所述改性环氧树脂通过如下方法制得：
S1、按照重量份，将环氧树脂、三聚氰胺和石墨烯加入搅拌装置中加热至60℃，以200r/min的速率搅拌30min，得到混合物A，备用；
S2、将聚氨酯预聚体和二氧化硅加入步骤S1中得到的混合物A中，加热至80℃搅拌20min，再将N，N-二甲基甲酰胺加入并继续以300r/min的速率搅拌1h，冷却后得到改性环氧树脂。
每份所述固化剂是由对羟基苯磺酸、正丁酯、甲基六氢苯酐和月桂酸锡按照重量比为0.4:0.6:0.1:0.8组成的混合物。
每份所述抗氧剂是由抗氧剂1010、抗氧剂168、抗氧剂2112和抗氧剂703按照重量比为0.4:0.8:0.6:0.1组成的混合物。
每份所述消泡剂是由聚二甲基硅氧烷、磷酸三丁酯和石蜡按照重量比为0.6:0.8:0.1组成的混合物。
每份所述交联剂为三聚氰胺、聚甲基氢硅氧烷和乙烯基三乙氧硅烷按照重量比为 0.6:0.1:0.8组成的混合物。
每份所述溶剂是由丙酮、乙酸丁酯、环氧乙烷和乙酸异戊酯按照重量比为0.4:0.6:0.1:0.8组成的混合物。
所述改性聚烯烃胶粘剂通过如下方法制得：
E1、按照重量份，将改性环氧树脂、聚烯烃和过氧化二苯甲酰分散到溶剂中并加入反应装置中，加热至80℃，并以350r/min搅拌20min，得到混合物A，备用；
E2、将α-甲基苯乙烯二聚体、交联剂和抗氧剂混合，加热至40℃并搅拌均匀，得到混合物B，备用；
E3、将步骤E2中得到的混合物B和消泡剂加入步骤E1中得到的混合物A中混合加热至80℃，以250r/min搅拌60min，再将固化剂加入，并继续搅拌40min，之后冷却至常温过滤得到的滤液即为该改性聚烯烃胶粘剂。
所述锂电池封装用铝塑膜通过如下步骤制得：
1)取聚丙烯热封层，在聚丙烯热封层的上表面贴敷一层聚氨酯胶粘剂再将铝箔层贴合于聚氨酯胶粘剂层上；
2)在铝箔层上表面贴敷一层改性聚烯烃胶粘剂再将改性聚丙烯层贴合于改性聚烯烃胶粘剂层上，得到铝塑膜初品；
3)将铝塑膜初品放置在烘箱内加热至60℃进行熟化成型4.5h；
4)再将步骤3)中烘箱的温度加至80℃进行高温熟化成型71h；
5)再将步骤4)中烘箱的温度降至60℃进行低温成型64h后得到铝塑膜成品。
对比例2
一种锂电池封装用铝塑膜，该铝塑膜从上到下包括聚氨酯纤维层、铝箔层和聚丙烯热封层，所述铝箔层贴合于所述聚丙烯热封层的上表面，所述聚氨酯纤维贴合于所述铝箔层的上表面，所述聚氨酯纤维层与铝箔层之间通过改性聚烯烃胶粘剂贴合，所述铝箔层与聚丙烯热封层之间通过聚氨酯胶粘剂贴合，所述聚氨酯胶粘剂为德国卫仕组角胶COSMOPUR 818C德国卫士聚氨酯胶粘剂；所述改性聚烯烃胶粘剂包括如下重量份的原料：
Figure PCTCN2020131551-appb-000015
所述聚烯烃为POE 8180美国陶氏聚烯烃。
每份所述固化剂是由对羟基苯磺酸、正丁酯、甲基六氢苯酐和月桂酸锡按照重量比为0.6:0.8:0.3:1.0组成的混合物。
每份所述抗氧剂是由抗氧剂1010、抗氧剂168、抗氧剂2112和抗氧剂703按照重量比为0.6:1.0:0.8:0.3组成的混合物。
每份所述消泡剂是由聚二甲基硅氧烷、磷酸三丁酯和石蜡按照重量比为0.8:1.0:0.3组成的混合物。
每份所述交联剂为三聚氰胺、聚甲基氢硅氧烷和乙烯基三乙氧硅烷按照重量比为0.8:0.3:1.0组成的混合物。
每份所述溶剂是由丙酮、乙酸丁酯、环氧乙烷和乙酸异戊酯按照重量比为0.6:0.8:0.3:1.0组成的混合物。
所述改性聚烯烃胶粘剂通过如下方法制得：
E1、按照重量份，将环氧树脂、聚烯烃和过氧化二苯甲酰分散到溶剂中并加入反应装置中，加热至90℃，并以400r/min搅拌30min，得到混合物A，备用；
E2、将α-甲基苯乙烯二聚体、交联剂和抗氧剂混合，加热至50℃并搅拌均匀，得到混合物B，备用；
E3、将步骤E2中得到的混合物B和消泡剂加入步骤E1中得到的混合物A中混合加热至90℃，以300r/min搅拌75min，再将固化剂加入，并继续搅拌50min，之后冷却至常温过滤得到的滤液即为该改性聚烯烃胶粘剂。
所述锂电池封装用铝塑膜通过如下步骤制得：
1)取聚丙烯热封层，在聚丙烯热封层的上表面贴敷一层聚氨酯胶粘剂再将铝箔层贴合于聚氨酯胶粘剂层上；
2)在铝箔层上表面贴敷一层改性聚烯烃胶粘剂再将聚氨酯纤维层贴合于改性聚烯烃胶粘剂层上，得到铝塑膜初品；
3)将铝塑膜初品放置在烘箱内加热至65℃进行熟化成型5.0h；
4)再将步骤3)中烘箱的温度加至85℃进行高温熟化成型72h；
5)再将步骤4)中烘箱的温度降至65℃进行低温成型65h后得到铝塑膜成品。
对比例3
一种锂电池封装用铝塑膜，该铝塑膜从上到下包括聚氨酯纤维层、铝箔层和聚丙烯热封层，所述铝箔层贴合于所述聚丙烯热封层的上表面，所述聚氨酯纤维贴合于所述铝箔层的上表面，所述聚氨酯纤维层与铝箔层之间通过改性聚烯烃胶粘剂贴合，所述铝箔层与聚丙烯热封层之间通过聚氨酯胶粘剂贴合，所述聚氨酯胶粘剂为德国卫仕组角胶COSMOPUR 818C德国卫士聚氨酯胶粘剂；所述改性聚烯烃胶粘剂包括如下重量份的原料：
Figure PCTCN2020131551-appb-000016
Figure PCTCN2020131551-appb-000017
所述聚烯烃为POE 8180美国陶氏聚烯烃。
每份所述改性环氧树脂包括如下重量份的原料：
Figure PCTCN2020131551-appb-000018
所述聚氨酯预聚体为上海鹤城高分子科技有限公司生产的聚氨酯预聚体HC-8799AB；所述环氧树脂的型号为环氧树脂E44。
所述改性环氧树脂通过如下方法制得：
S1、按照重量份，将环氧树脂、三聚氰胺加入搅拌装置中加热至80℃，以300r/min的速率搅拌60min，得到混合物A，备用；
S2、将聚氨酯预聚体和二氧化硅加入步骤S1中得到的混合物A中，加热至120℃搅拌40min，再将N，N-二甲基甲酰胺加入并继续以450r/min的速率搅拌3h，冷却后得到改性环氧树脂。
每份所述固化剂是由对羟基苯磺酸、正丁酯、甲基六氢苯酐和月桂酸锡按照重量比为0.8:1.0:0.5:1.2组成的混合物。
每份所述抗氧剂是由抗氧剂1010、抗氧剂168、抗氧剂2112和抗氧剂703按照重量比为0.8:1.2:1.0:0.5组成的混合物。
每份所述消泡剂是由聚二甲基硅氧烷、磷酸三丁酯和石蜡按照重量比为1.0:1.2:0.5组成的混合物。
每份所述交联剂为三聚氰胺、聚甲基氢硅氧烷和乙烯基三乙氧硅烷按照重量比为1.0:0.5:1.2组成的混合物。
每份所述溶剂是由丙酮、乙酸丁酯、环氧乙烷和乙酸异戊酯按照重量比为0.8:1.0:0.5:1.2组成的混合物。
所述改性聚烯烃胶粘剂通过如下方法制得：
E1、按照重量份，将改性环氧树脂、聚烯烃和过氧化二苯甲酰分散到溶剂中并加入反应装置中，加热至100℃，并以450r/min搅拌40min，得到混合物A，备用；
E2、将α-甲基苯乙烯二聚体、交联剂和抗氧剂混合，加热至60℃并搅拌均匀，得到混合物B，备用；
E3、将步骤E2中得到的混合物B和消泡剂加入步骤E1中得到的混合物A中混合加热至100℃，以350r/min搅拌90min，再将固化剂加入，并继续搅拌60min，之后冷却至常温过滤得到的滤液即为该改性聚烯烃胶粘剂。
所述锂电池封装用铝塑膜通过如下步骤制得：
1)取聚丙烯热封层，在聚丙烯热封层的上表面贴敷一层聚氨酯胶粘剂再将铝箔层贴合于聚氨酯胶粘剂层上；
2)在铝箔层上表面贴敷一层改性聚烯烃胶粘剂再将聚氨酯纤维层贴合于改性聚烯烃胶粘剂层上，得到铝塑膜初品；
3)将铝塑膜初品放置在烘箱内加热至70℃进行熟化成型5.5h；
4)再将步骤3)中烘箱的温度加至90℃进行高温熟化成型73h；
5)再将步骤4)中烘箱的温度降至70℃进行低温成型66h后得到铝塑膜成品。
对比例4
一种锂电池封装用铝塑膜，该铝塑膜从上到下包括聚氨酯纤维层、铝箔层和聚丙烯热封层，所述铝箔层贴合于所述聚丙烯热封层的上表面，所述聚氨酯纤维贴合于所述铝箔层的上表面，所述聚氨酯纤维层与铝箔层之间通过改性聚烯烃胶粘剂贴合，所述铝箔层与聚丙烯热封层之间通过聚氨酯胶粘剂贴合，所述聚氨酯胶粘剂为德国卫仕组角胶COSMOPUR 818C德国卫士聚氨酯胶粘剂；所述改性聚烯烃胶粘剂包括如下重量份的原料：
Figure PCTCN2020131551-appb-000019
所述聚烯烃为POE 8180美国陶氏聚烯烃。
每份所述改性环氧树脂包括如下重量份的原料：
Figure PCTCN2020131551-appb-000020
所述聚氨酯预聚体为上海鹤城高分子科技有限公司生产的聚氨酯预聚体HC-8799AB。
所述改性环氧树脂通过如下方法制得：
S1、按照重量份，将环氧树脂、三聚氰胺和石墨烯加入搅拌装置中加热至80℃，以300r/min的速率搅拌60min，得到混合物A，备用；
S2、将聚氨酯预聚体和二氧化硅加入步骤S1中得到的混合物A中，加热至120℃搅拌40min，再将N，N-二甲基甲酰胺加入并继续以450r/min的速率搅拌3h，冷却后得到改性环氧树脂。
每份所述固化剂是由对羟基苯磺酸、正丁酯、甲基六氢苯酐和月桂酸锡按照重量比为0.8:1.0:0.5:1.2组成的混合物。
每份所述抗氧剂是由抗氧剂1010、抗氧剂168、抗氧剂2112和抗氧剂703按照重量比为0.8:1.2:1.0:0.5组成的混合物。
每份所述消泡剂是由聚二甲基硅氧烷、磷酸三丁酯和石蜡按照重量比为1.0:1.2:0.5组成的混合物。
每份所述交联剂为三聚氰胺、聚甲基氢硅氧烷和乙烯基三乙氧硅烷按照重量比为1.0:0.5:1.2组成的混合物。
每份所述溶剂是由丙酮、乙酸丁酯、环氧乙烷和乙酸异戊酯按照重量比为0.8:1.0:0.5:1.2组成的混合物。
所述改性聚烯烃胶粘剂通过如下方法制得：
E1、按照重量份，将改性环氧树脂、聚烯烃和过氧化二苯甲酰分散到溶剂中并加入反应装置中，加热至100℃，并以450r/min搅拌40min，得到混合物A，备用；
E2、将α-甲基苯乙烯二聚体、交联剂和抗氧剂混合，加热至60℃并搅拌均匀，得到混合物B，备用；
E3、将步骤E2中得到的混合物B和消泡剂加入步骤E1中得到的混合物A中混合加热至100℃，以350r/min搅拌90min，再将固化剂加入，并继续搅拌60min，之后冷却至常温过滤得到的滤液即为该改性聚烯烃胶粘剂。
所述锂电池封装用铝塑膜通过如下步骤制得：
1)取聚丙烯热封层，在聚丙烯热封层的上表面贴敷一层聚氨酯胶粘剂再将铝箔层贴合于聚氨酯胶粘剂层上；
2)在铝箔层上表面贴敷一层改性聚烯烃胶粘剂再将聚氨酯纤维层贴合于改性聚 烯烃胶粘剂层上，得到铝塑膜初品；
3)将铝塑膜初品放置在烘箱内加热至40℃进行熟化成型144h后得到铝塑膜成品。
对实施例1-5和对比例1-4制得的铝塑膜的剥离力(GB/T15254-94)、断裂伸长率(GB/T1701-2001)、耐腐蚀效率(CGSB 31-GP-0A METH 38.2-1957)、冲壳后白线、热封溶胶性是否漏铝表进行测试，结果如下表所示：
Figure PCTCN2020131551-appb-000021
由上表可知，本发明实施例1-5中制得的铝塑膜的剥离力、断裂伸长率、耐腐蚀效率显著提升，同时，冲壳后白线和热封溶胶性是否漏铝显著改善，使制得的铝塑膜具有很好的阻隔性能、延展性和内腐蚀性，另外，还具有良好的冲壳后白线和热封溶胶性防漏铝作用，以及使用寿命长，生产成本低的优点。
与实施例1相比，对比例1中在制备铝塑膜用改性聚丙烯层代替了聚氨酯纤维层，对利用上述原料制得的铝塑膜进行各项物性测试，分析发现此铝塑膜的剥离力、断裂伸长率、耐腐蚀效率相对下降，冲壳后白线和热封溶胶性防漏铝作用相对减弱；说明本发明在制备铝塑膜时用聚氨酯纤维层，能使制得的铝塑膜具有很好的剥离力、断裂伸长率、耐腐蚀效率，同时，还具有冲壳后白线和热封溶胶性防漏铝作用显著改善，使制得的铝塑膜具有很好的阻隔性能、延展性和内腐蚀性，另外，还具有良好的冲壳后白线和热封溶胶性防漏铝作用，以及使用寿命长，生产成本低的优点。
与实施例3相比，对比例2中在制备铝塑膜所用改性聚烯烃胶粘剂时用环氧树脂代替了改性环氧树脂，对利用上述原料制得的铝塑膜进行各项物性测试，分析发现此铝塑膜的剥离力、断裂伸长率、耐腐蚀效率显著下降，冲壳后白线和热封溶胶性防漏铝作用相对减弱；说明本发明在制备铝塑膜所用改性聚烯烃胶粘剂时采用改性环氧树脂，能使制得的铝塑膜具有很好的剥离力、断裂伸长率、耐腐蚀效率，同时，还具有冲壳后白线和热封溶胶性防漏铝作用显著改善，使制得的铝塑膜具有很好的阻隔性能、延展性和内腐蚀性，另外，还具有良好的冲壳后白线和热封溶胶性防漏铝作用，以及使用寿命长，生产成本低的优点。
与实施例5相比，对比例3中在制备铝塑膜所用改性聚烯烃胶粘剂中改性环氧树脂时没有添加石墨烯，对利用上述原料制得的铝塑膜进行各项物性测试，分析发现此铝塑膜 的剥离力、断裂伸长率、耐腐蚀效率相对下降，冲壳后白线和热封溶胶性防漏铝作用相对减弱；说明本发明在制备铝塑膜所用改性聚烯烃胶粘剂中改性环氧树脂时添加石墨烯，能使制得的铝塑膜具有很好的剥离力、断裂伸长率、耐腐蚀效率，同时，还具有冲壳后白线和热封溶胶性防漏铝作用显著改善，使制得的铝塑膜具有很好的阻隔性能、延展性和内腐蚀性，另外，还具有良好的冲壳后白线和热封溶胶性防漏铝作用，以及使用寿命长，生产成本低的优点。
与实施例5相比，对比例4中在制备铝塑膜的工艺中采用现有技术的低温40℃恒温熟化成型，对利用上述工艺制得的铝塑膜进行各项物性测试，分析发现此铝塑膜的剥离力、断裂伸长率、耐腐蚀效率相对下降，冲壳后白线和热封溶胶性防漏铝作用显著减弱；说明本发明在制备铝塑膜的工艺中采用现有高低温熟化成型，能使制得的铝塑膜具有很好的剥离力、断裂伸长率、耐腐蚀效率，同时，还能显著改善冲壳后白线和热封溶胶性防漏铝作用，使制得的铝塑膜具有很好的阻隔性能、延展性和内腐蚀性，另外，还具有良好的冲壳后白线和热封溶胶性防漏铝作用，以及使用寿命长，生产成本低的优点。
上述实施例为本发明较佳的实现方案，除此之外，本发明还可以其它方式实现，在不脱离本发明构思的前提下任何显而易见的替换均在本发明的保护范围之内。

Claims (10)

  1. 一种锂电池封装用铝塑膜，其特征在于：该铝塑膜从上到下包括聚氨酯纤维层、铝箔层和聚丙烯热封层，所述铝箔层贴合于所述聚丙烯热封层的上表面，所述聚氨酯纤维贴合于所述铝箔层的上表面，所述聚氨酯纤维层与铝箔层之间通过改性聚烯烃胶粘剂贴合，所述铝箔层与聚丙烯热封层之间通过聚氨酯胶粘剂贴合，所述改性聚烯烃胶粘剂包括如下重量份的原料：
    Figure PCTCN2020131551-appb-100001
  2. 根据权利要求1所述的一种锂电池封装用铝塑膜，其特征在于：每份所述改性环氧树脂包括如下重量份的原料：
    Figure PCTCN2020131551-appb-100002
  3. 根据权利要求2所述的一种锂电池封装用铝塑膜，其特征在于：所述改性环氧树脂通过如下方法制得：
    S1、按照重量份，将环氧树脂、三聚氰胺和石墨烯加入搅拌装置中加热至60-80℃，以200-300r/min的速率搅拌30-60min，得到混合物A，备用；
    S2、将聚氨酯预聚体和二氧化硅加入步骤S1中得到的混合物A中，加热至80-120℃搅拌20-40min，再将N，N-二甲基甲酰胺加入并继续以300-450r/min的速率搅拌1-3h，冷却后得到改性环氧树脂。
  4. 根据权利要求1所述的一种锂电池封装用铝塑膜，其特征在于：每份所述固化剂为对羟基苯磺酸、正丁酯、甲基六氢苯酐和月桂酸锡中的至少一种。
  5. 根据权利要求1所述的一种锂电池封装用铝塑膜，其特征在于：每份所述抗氧剂为抗氧剂1010、抗氧剂168、抗氧剂619、抗氧剂703、抗氧剂BHT、抗氧剂2112和抗氧剂703中的至少一种。
  6. 根据权利要求1所述的一种锂电池封装用铝塑膜，其特征在于：每份所述消泡剂为聚二甲基硅氧烷、磷酸三丁酯和石蜡中的至少一种。
  7. 根据权利要求1所述的一种锂电池封装用铝塑膜，其特征在于：每份所述交联剂为三聚氰胺、聚甲基氢硅氧烷和乙烯基三乙氧硅烷按照重量比为0.6-1.0:0.1-0.5:0.8-1.2组成的混合物。
  8. 根据权利要求1所述的一种锂电池封装用铝塑膜，其特征在于：每份所述溶剂为丙酮、乙酸丁酯、环氧乙烷和乙酸异戊酯中的至少一种。
  9. 根据权利要求1-8任一项所述的一种锂电池封装用铝塑膜，其特征在于：所述改性聚烯烃胶粘剂通过如下方法制得：
    E1、按照重量份，将改性环氧树脂、聚烯烃和过氧化二苯甲酰分散到溶剂中并加入反应装置中，加热至80-100℃，并以350-450r/min搅拌20-40min，得到混合物A，备用；
    E2、将α-甲基苯乙烯二聚体、交联剂和抗氧剂混合，加热至40-60℃并搅拌均匀，得到混合物B，备用；
    E3、将步骤E2中得到的混合物B和消泡剂加入步骤E1中得到的混合物A中混合加热至80-100℃，以250-350r/min搅拌60-90min，再将固化剂加入，并继续搅拌40-60min，之后冷却至常温过滤得到的滤液即为该改性聚烯烃胶粘剂。
  10. 一种根据权利要求1-8任一项所述的锂电池封装用铝塑膜的制备方法，其特征在于：包括如下步骤：
    1)取聚丙烯热封层，在聚丙烯热封层的上表面贴敷一层聚氨酯胶粘剂再将铝箔层贴合于聚氨酯胶粘剂层上；
    2)在铝箔层上表面贴敷一层改性聚烯烃胶粘剂再将聚氨酯纤维层贴合于改性聚烯烃胶粘剂层上，得到铝塑膜初品；
    3)将铝塑膜初品放置在烘箱内加热至60-70℃进行熟化成型4.5-5.5h；
    4)再将步骤3)中烘箱的温度加至80-90℃进行高温熟化成型71-73h；
    5)再将步骤4)中烘箱的温度降至60-70℃进行低温成型64-66h后得到铝塑膜成品。
PCT/CN2020/131551 2020-04-03 2020-11-25 一种锂电池封装用铝塑膜及其制备方法 WO2021196669A1 (zh)

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