[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

CN111572135A - Aluminum-plastic film for lithium battery packaging and preparation method thereof - Google Patents

Aluminum-plastic film for lithium battery packaging and preparation method thereof Download PDF

Info

Publication number
CN111572135A
CN111572135A CN202010261344.3A CN202010261344A CN111572135A CN 111572135 A CN111572135 A CN 111572135A CN 202010261344 A CN202010261344 A CN 202010261344A CN 111572135 A CN111572135 A CN 111572135A
Authority
CN
China
Prior art keywords
aluminum
plastic film
layer
mixture
antioxidant
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202010261344.3A
Other languages
Chinese (zh)
Other versions
CN111572135B (en
Inventor
周新平
刘礼
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jiangxi Mingguan Lithium Film Technology Co ltd
Original Assignee
Jiangxi Mingguan Lithium Film Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jiangxi Mingguan Lithium Film Technology Co ltd filed Critical Jiangxi Mingguan Lithium Film Technology Co ltd
Priority to CN202010261344.3A priority Critical patent/CN111572135B/en
Publication of CN111572135A publication Critical patent/CN111572135A/en
Priority to PCT/CN2020/131551 priority patent/WO2021196669A1/en
Application granted granted Critical
Publication of CN111572135B publication Critical patent/CN111572135B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00Layered 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
    • B32B5/02Layered 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00Layered products comprising a layer of metal
    • B32B15/14Layered products comprising a layer of metal next to a fibrous or filamentary layer
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00Layered products comprising a layer of metal
    • B32B15/20Layered products comprising a layer of metal comprising aluminium or copper
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • B32B27/06Layered 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00Layered products comprising a layer of synthetic resin
    • B32B27/32Layered products comprising a layer of synthetic resin comprising polyolefins
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B33/00Layered 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00Layered 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
    • B32B7/04Interconnection of layers
    • B32B7/12Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09JADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/02Non-macromolecular additives
    • C09J11/04Non-macromolecular additives inorganic
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09JADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/02Non-macromolecular additives
    • C09J11/06Non-macromolecular additives organic
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09JADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/08Macromolecular additives
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09JADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J123/00Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers
    • C09J123/02Adhesives 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
    • C09J123/04Homopolymers or copolymers of ethene
    • C09J123/08Copolymers of ethene
    • C09J123/0807Copolymers of ethene with unsaturated hydrocarbons only containing more than three carbon atoms
    • C09J123/0815Copolymers of ethene with aliphatic 1-olefins
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10Primary casings; Jackets or wrappings
    • H01M50/116Primary casings; Jackets or wrappings characterised by the material
    • H01M50/124Primary casings; Jackets or wrappings characterised by the material having a layered structure
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02Synthetic macromolecular fibres
    • B32B2262/0292Polyurethane fibres
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00Properties of the layers or laminate
    • B32B2307/70Other properties
    • B32B2307/724Permeability to gases, adsorption
    • B32B2307/7242Non-permeable
    • B32B2307/7244Oxygen barrier
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00Properties of the layers or laminate
    • B32B2307/70Other properties
    • B32B2307/724Permeability to gases, adsorption
    • B32B2307/7242Non-permeable
    • B32B2307/7246Water vapor barrier
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00Properties of the layers or laminate
    • B32B2307/70Other properties
    • B32B2307/752Corrosion inhibitor
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00Polymer mixtures characterised by other features
    • C08L2205/03Polymer mixtures characterised by other features containing three or more polymers in a blend
    • C08L2205/035Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
  • Laminated Bodies (AREA)

Abstract

The invention relates to the technical field of lithium battery packaging soft packaging materials, in particular to an aluminum plastic film for lithium battery packaging and a preparation method thereof, the aluminum plastic film comprises a polyurethane fiber 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, polyurethane fibers are attached to the aluminum foil layer, the polyurethane fiber layer and the aluminum foil layer are attached through a modified polyolefin adhesive, the aluminum foil layer and the polypropylene heat sealing layer are attached through a polyurethane adhesive, and the modified polyolefin adhesive comprises the following raw materials in parts by weight: 1-5 parts of alpha-methyl styrene dimer, 1-3 parts of dibenzoyl peroxide, 15-25 parts of modified epoxy resin, 20-30 parts of polyolefin, 1-5 parts of curing agent, 0.5-3 parts of antioxidant, 1-3 parts of defoaming agent, 1-5 parts of crosslinking agent and 20-40 parts of solvent. The aluminum-plastic film disclosed by the invention has excellent barrier property, extensibility and corrosion resistance, and also has a good heat-sealing collosol aluminum leakage prevention effect.

Description

Aluminum-plastic film for lithium battery packaging and preparation method thereof
Technical Field
The invention relates to the technical field of lithium battery packaging soft packaging materials, in particular to an aluminum plastic film for lithium battery packaging and a preparation method thereof.
Background
In recent years, the application amount of the soft package lithium battery is increased rapidly due to the rapid development of new energy industries. The soft package lithium battery packaged by the aluminum plastic film has the characteristics of flexible shape, good safety performance and high energy density, and greatly improves the flexibility and the applicability of battery design, thereby being capable of matching with the product requirements to be made into batteries with various shapes and capacities and providing higher design flexibility and adaptability for developers on power supply solutions. At present, soft package lithium batteries are mainly used for mainstream digital products and electric vehicles, but a common aluminum plastic film cannot meet the performance requirement of a polymer lithium battery packaging material, and the packaging material of the polymer lithium battery is generally required to have extremely high barrier property, good cold stamping formability, puncture resistance, electrolyte resistance stability, insulating heat sealing performance and the like.
Disclosure of Invention
In order to overcome the defects and shortcomings in the prior art, the invention aims to provide the aluminum-plastic film for lithium battery packaging, which has excellent barrier property, extensibility and corrosion resistance, and also has good heat-sealing sol-phase aluminum leakage prevention effect.
The invention also aims to provide a preparation method of the aluminum-plastic film for lithium battery packaging, which adopts a high-low temperature curing process to make the prepared aluminum-plastic film overcome the problems of poor white line, poor sol property and low peeling force after the aluminum-plastic film is subjected to shell punching and prepared by constant-temperature curing and molding at the low temperature of 40 ℃.
The purpose of the invention is realized by the following technical scheme: an aluminum-plastic film for packaging a lithium battery comprises a polyurethane fiber layer, an aluminum foil layer and a polypropylene heat-sealing layer from top to bottom, wherein the aluminum foil layer is attached to the upper surface of the polypropylene heat-sealing layer, polyurethane fibers are attached to the upper surface of the aluminum foil layer, the polyurethane fiber layer is attached to the aluminum foil layer through a modified polyolefin adhesive, the aluminum foil layer is attached to the polypropylene heat-sealing layer through a polyurethane adhesive, and the polyurethane adhesive is a German Weishi corner-group adhesive COSMOPUR 818C German Weishi polyurethane adhesive; the modified polyolefin adhesive comprises the following raw materials in parts by weight:
Figure BDA0002439409730000021
the polyolefin is POE 8180 American Dow polyolefin.
The aluminum-plastic film is prepared from a polyurethane fiber layer, an aluminum foil layer and a polypropylene heat-sealing layer which are sequentially laminated from top to bottom, the polyurethane fiber layer and the aluminum foil layer are limited to be laminated through a modified polyolefin adhesive, and the aluminum foil layer and the polypropylene heat-sealing layer are laminated through a polyurethane adhesive, so that the prepared aluminum-plastic film has excellent barrier property, extensibility and corrosion resistance, and simultaneously has good heat-sealing collosol-property aluminum leakage prevention function and white line condition after being placed and stamped. The adopted polyurethane fiber layer can effectively prevent air, particularly oxygen, from permeating, maintain the internal environment of the battery, and simultaneously ensure that the packaging aluminum foil has good deformation capacity; the aluminum foil layer can effectively prevent moisture in the air from permeating, maintain the internal structure of the battery, have certain thickness and strength, and can prevent the electric core from being damaged by external force; the polypropylene heat-sealing layer cannot be dissolved, corroded, swelled and the like by an organic solvent in the battery cell, is the most direct package protection, insulation and effective prevention of the contact between the internal electrolyte and the aluminum foil layer in the internal environment of the battery cell, and avoids the corrosion of the aluminum foil layer. In addition, the alpha-methyl styrene dimer adopted in the modified polyolefin adhesive takes a linear dimer as a molecular chain transfer agent, so that the obtained modified polyolefin adhesive has good adhesion, bubbling resistance, smoothness, surface strength and printability; the dibenzoyl peroxide is used as the initiator of the adhesive, and free radicals generated by electron transfer between an oxidant and a reducing agent are used for initiating polymerization reaction, so that the reaction rate for preparing the modified polyolefin adhesive can be increased, and the energy consumption is reduced; the polyolefin has the characteristics of low surface energy, high crystallinity, weak polarity and poor viscosity, so that the raw materials and the process are required to be modified to improve the adhesive property of the polyolefin.
Preferably, each part of the modified epoxy resin comprises the following raw materials in parts by weight:
Figure BDA0002439409730000031
the modified epoxy resin is prepared by the following method:
s1, adding epoxy resin, melamine and graphene in parts by weight into a stirring device, heating to 60-80 ℃, and stirring at the speed of 200-300r/min for 30-60min to obtain a mixture A for later use;
s2, adding the polyurethane prepolymer and silicon dioxide into the mixture A obtained in the step S1, heating to 80-120 ℃, stirring for 20-40min, adding N, N-dimethylformamide, continuously stirring for 1-3h at the speed of 300-450r/min, and cooling to obtain the modified epoxy resin.
The modified epoxy resin modified by the raw materials and the process has good wear resistance, scratch resistance and tensile resistance. N, N dimethyl formamide as an organic solvent can well dissolve and disperse silicon dioxide and graphene into epoxy resin together with melamine to carry out filling modification on the epoxy resin; the polyurethane prepolymer can be used as a main component with an adhesive function in the modified epoxy resin, and the adhesive property, the ductility and the barrier property of the modified polyolefin adhesive are improved in an auxiliary manner in the preparation process of the modified polyolefin adhesive; in addition, the stirring speed in the step S1 needs to be strictly controlled to 200-300r/min in the process of preparing the modified epoxy resin, if the stirring speed is too fast, the dispersion effect between the graphene and the epoxy resin and the melamine due to too large centrifugal force is not good, and if the stirring speed is too low, the dispersion between the graphene and the epoxy resin and the melamine is not good, and further the modification of the epoxy resin by the graphene is not good.
Preferably, each part of the curing agent is at least one of p-hydroxybenzene sulfonic acid, n-butyl ester, methyl hexahydrophthalic anhydride and tin laurate; more preferably, the curing agent is a mixture of p-hydroxybenzene sulfonic acid, n-butyl ester, methyl hexahydrophthalic anhydride and tin laurate according to the weight ratio of 0.4-0.8:0.6-1.0:0.1-0.5: 0.8-1.2. Each part of the antioxidant 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 of 0.4-0.8:0.8-1.2:0.6-1.0:0.1-0.5 by weight of antioxidant 1010, antioxidant 168, antioxidant 2112 and antioxidant 703.
The p-hydroxybenzene sulfonic acid adopted by the curing agent is used for curing the modified polyolefin adhesive and has an emulsifying effect, and the curing effect of the curing agent in the process of preparing the modified polyolefin adhesive is further improved by coordinating the respective advantages of the p-hydroxybenzene sulfonic acid, the n-butyl ester, the methyl hexahydrophthalic anhydride and the tin laurate, so that the prepared modified polyolefin adhesive has a good coating effect. The antioxidant 1010 has excellent oxidation resistance on the modified epoxy resin and the polyolefin, and the antioxidant 1010 can effectively prevent the thermal oxidation degradation of the modified polyolefin adhesive in the long-term aging process, so that the service life of the aluminum-plastic film is prolonged, and in addition, the antioxidant 1010 can be used together with the antioxidant 168 to have a synergistic effect; the antioxidant 168, the antioxidant 2112 and the antioxidant 703 are auxiliary antioxidants of the antioxidant 1010, are compounded with the main antioxidant 1010, have good synergistic effect, can effectively prevent the thermal degradation of the modified epoxy resin and the polyolefin in the basic injection molding, and provide extra long-term protection for the modified polyolefin adhesive.
Preferably, each part of the defoaming agent is at least one of polydimethylsiloxane, tributyl phosphate and paraffin; more preferably, the defoaming agent is a mixture of polydimethylsiloxane, tributyl phosphate and paraffin wax according to the weight ratio of 0.6-1.0:0.8-1.2: 0.1-0.5. Each part of the cross-linking agent is a mixture of melamine, polymethylhydrosiloxane and vinyl triethoxysilane according to the weight ratio of 0.6-1.0:0.1-0.5: 0.8-1.2. Each part of the solvent is at least one of acetone, butyl acetate, ethylene oxide and isoamyl acetate; more preferably, the solvent is a mixture of acetone, butyl acetate, ethylene oxide and isoamyl acetate in a weight ratio of 0.4-0.8:0.6-1.0:0.1-0.5: 0.8-1.2.
The defoaming agent can remove air entrained in the preparation process of the modified polyolefin adhesive to form bubbles or generate bubbles due to reaction, so that the influence on the bonding effect of the modified polyolefin adhesive between the polyurethane fiber layer and the aluminum foil layer is avoided, and the quality of an aluminum-plastic film product is further influenced; the crosslinking agent adopts polymethyl hydrogen siloxane molecules, active hydrogen atoms directly connected with silicon atoms in the polymethyl hydrogen siloxane molecules and vinyl in modified epoxy resin and modified epoxy resin-polyolefin to carry out addition reaction so as to vulcanize raw rubber, and generally, more than 3 Si-H groups are arranged in one molecule, so that the flexibility and the physical and mechanical properties of a vulcanized rubber network structure can be obviously improved; the adopted solvent has good dissolving effect on the raw materials, so that the raw materials are convenient to fuse and diffuse, and the efficiency of preparing the modified polyolefin adhesive can be well improved.
Preferably, the modified polyolefin adhesive is prepared by the following method:
e1, dispersing the modified epoxy resin, the polyolefin and the dibenzoyl peroxide into a solvent according to the parts by weight, adding the solvent into a reaction device, heating to 80-100 ℃, and stirring at 450r/min for 20-40min to obtain a mixture A for later use;
e2, mixing the alpha-methyl styrene dimer, the cross-linking agent and the antioxidant, heating to 40-60 ℃, and uniformly stirring to obtain a mixture B for later use;
e3, adding the mixture B obtained in the step E2 and the defoaming agent into the mixture A obtained in the step E1, mixing and heating to 80-100 ℃, stirring for 60-90min at the speed of 250-350r/min, adding the curing agent, continuing stirring for 40-60min, cooling to normal temperature, and filtering to obtain a filtrate, namely the modified polyolefin adhesive.
The modified polyolefin adhesive prepared by the method has the characteristics of good adhesion, smoothness, surface strength, solvent resistance and acid resistance, an inner layer modified polyolefin adhesive layer is formed by coating the modified polyolefin adhesive on the surface of a polypropylene heat-sealing layer, and the polypropylene heat-sealing layer with the inner layer modified polyolefin adhesive layer is compounded with an aluminum foil layer in a dry mode, so that the electrolyte resistance of the aluminum plastic film is improved. When the modified polyolefin adhesive is prepared, the heating temperature of the step E1 needs to be strictly controlled to be 80-100 ℃, if the temperature is too high, the initiation effect of dibenzoyl peroxide is limited, the subsequent reaction between the modified epoxy resin and olefin and other auxiliaries is not facilitated, and if the temperature is too low, the Brownian motion of a system is reduced, and the dispersion and the compounding among the raw materials are not facilitated; in addition, the stirring speed in the step E3 needs to be controlled to be 250-350r/min, if the stirring speed is too high, more bubbles are mixed in the system, which is not favorable for subsequent defoaming, and further influences the quality of the prepared modified polyolefin adhesive, and finally influences the quality of the prepared aluminum-plastic film, and if the stirring speed is too low, the diffusion between the defoaming agent and the mixing system is not favorable, and further is not favorable for defoaming the finally prepared modified polyolefin adhesive.
The invention also provides a preparation method of the aluminum-plastic film for lithium battery packaging, which comprises the following steps:
1) taking a polypropylene heat-sealing layer, pasting a polyurethane adhesive layer on the upper surface of the polypropylene heat-sealing layer, and pasting an aluminum foil layer on the polyurethane adhesive layer;
2) pasting a layer of modified polyolefin adhesive on the upper surface of the aluminum foil layer, and pasting a polyurethane fiber layer on the modified polyolefin adhesive layer to obtain an aluminum-plastic film primary product;
3) placing the primary aluminum-plastic film in an oven, heating to 60-70 ℃, and curing and molding for 4.5-5.5 h;
4) then, the temperature of the oven in the step 3) is increased to 80-90 ℃ for high-temperature curing molding for 71-73 h;
5) and then, reducing the temperature of the oven in the step 4) to 60-70 ℃ for low-temperature forming for 64-66h to obtain the finished product of the aluminum-plastic film.
The aluminum-plastic film is prepared by the method, and the aluminum-plastic film prepared by the method has excellent barrier property, heat sealing property, extensibility and corrosion resistance; the method adopts a high-low temperature curing process to make the prepared aluminum-plastic film overcome the problems of poor white line, poor sol property and low peeling force after the shell of the aluminum-plastic film prepared by constant-temperature curing molding at low temperature of 40 ℃ in the prior art is punched; in the method, the heating temperature in the step 3), the step 4) and the step 5) needs to be controlled, so that a high-temperature and low-temperature curing process is formed.
The invention has the beneficial effects that: the aluminum plastic film disclosed by the invention has excellent barrier property, heat sealing property, extensibility and corrosion resistance. The inner layer modified polyolefin adhesive layer is formed by coating the modified polyolefin adhesive on the surface of the polypropylene heat-sealing layer, and then the polypropylene heat-sealing layer with the inner layer modified polyolefin adhesive layer is compounded with the aluminum foil layer in a dry manner, so that the electrolyte resistance of the aluminum plastic film is improved. The adopted polyurethane fiber layer can effectively prevent air, particularly oxygen, from permeating, maintain the internal environment of the battery, and simultaneously ensure that the packaging aluminum foil has good deformation capacity; the aluminum foil layer can effectively prevent moisture in the air from permeating, maintain the internal structure of the battery, have certain thickness and strength, and can prevent the electric core from being damaged by external force; the polypropylene heat-sealing layer cannot be dissolved, corroded, swelled and the like by an organic solvent in the battery cell, is the most direct package protection, insulation and effective prevention of the contact between the internal electrolyte and the aluminum foil layer in the internal environment of the battery cell, and avoids the corrosion of the aluminum foil layer.
The preparation method of the aluminum plastic film for lithium battery packaging is simple and efficient, convenient to operate and control, high in quality of produced products and beneficial to industrial production.
Detailed Description
The present invention will be further described with reference to the following examples for facilitating understanding of those skilled in the art, and the description of the embodiments is not intended to limit the present invention.
Example 1
An aluminum-plastic film for packaging a lithium battery comprises a polyurethane fiber layer, an aluminum foil layer and a polypropylene heat-sealing layer from top to bottom, wherein the aluminum foil layer is attached to the upper surface of the polypropylene heat-sealing layer, polyurethane fibers are attached to the upper surface of the aluminum foil layer, the polyurethane fiber layer is attached to the aluminum foil layer through a modified polyolefin adhesive, the aluminum foil layer is attached to the polypropylene heat-sealing layer through a polyurethane adhesive, and the polyurethane adhesive is a German Weishi corner-group adhesive COSMOPUR 818C German Weishi polyurethane adhesive; the modified polyolefin adhesive comprises the following raw materials in parts by weight:
Figure BDA0002439409730000071
Figure BDA0002439409730000081
the polyolefin is POE 8180 American Dow polyolefin.
Each part of the modified epoxy resin comprises the following raw materials in parts by weight:
Figure BDA0002439409730000082
the polyurethane prepolymer is a polyurethane prepolymer HC-8799AB produced by Shanghai Hecheng Polymer technology Co., Ltd; the type of the epoxy resin is epoxy resin E44.
The modified epoxy resin is prepared by the following method:
s1, adding epoxy resin, melamine and graphene in parts by weight into a stirring device, heating to 60 ℃, and stirring at a speed of 200r/min for 30min to obtain a mixture A for later use;
s2, adding the polyurethane prepolymer and silicon dioxide into the mixture A obtained in the step S1, heating to 80 ℃, stirring for 20min, adding N, N-dimethylformamide, continuously stirring for 1h at the speed of 300r/min, and cooling to obtain the modified epoxy resin.
Each part of the curing agent is a mixture of p-hydroxybenzene sulfonic acid, n-butyl ester, methyl hexahydrophthalic anhydride and tin laurate according to the weight ratio of 0.4:0.6:0.1: 0.8.
Each part of the antioxidant is a mixture of an antioxidant 1010, an antioxidant 168, an antioxidant 2112 and an antioxidant 703 in a weight ratio of 0.4:0.8:0.6: 0.1.
Each part of the defoaming agent is a mixture of polydimethylsiloxane, tributyl phosphate and paraffin according to the weight ratio of 0.6:0.8: 0.1.
Each part of the cross-linking agent is a mixture of melamine, polymethylhydrosiloxane and vinyl triethoxysilane according to the weight ratio of 0.6:0.1: 0.8.
Each part of the solvent is a mixture of acetone, butyl acetate, ethylene oxide and isoamyl acetate according to the weight ratio of 0.4:0.6:0.1: 0.8.
The modified polyolefin adhesive is prepared by the following method:
e1, dispersing the modified epoxy resin, the polyolefin and the dibenzoyl peroxide into a solvent according to the parts by weight, adding the solvent into a reaction device, heating to 80 ℃, and stirring at 350r/min for 20min to obtain a mixture A for later use;
e2, mixing the alpha-methyl styrene dimer, the cross-linking agent and the antioxidant, heating to 40 ℃, and uniformly stirring to obtain a mixture B for later use;
e3, adding the mixture B obtained in the step E2 and a defoaming agent into the mixture A obtained in the step E1, mixing and heating to 80 ℃, stirring at 250r/min for 60min, adding a curing agent, continuing stirring for 40min, cooling to normal temperature, and filtering to obtain a filtrate, namely the modified polyolefin adhesive.
The aluminum-plastic film for lithium battery packaging is prepared by the following steps:
1) taking a polypropylene heat-sealing layer, pasting a polyurethane adhesive layer on the upper surface of the polypropylene heat-sealing layer, and pasting an aluminum foil layer on the polyurethane adhesive layer;
2) pasting a layer of modified polyolefin adhesive on the upper surface of the aluminum foil layer, and pasting a polyurethane fiber layer on the modified polyolefin adhesive layer to obtain an aluminum-plastic film primary product;
3) placing the primary aluminum-plastic film in an oven, heating to 60 ℃, and curing and molding for 4.5 hours;
4) then, the temperature of the oven in the step 3) is increased to 80 ℃ for high-temperature curing molding for 71 h;
5) and then, reducing the temperature of the oven in the step 4) to 60 ℃ for low-temperature forming for 64h to obtain the finished product of the aluminum-plastic film.
Example 2
An aluminum-plastic film for packaging a lithium battery comprises a polyurethane fiber layer, an aluminum foil layer and a polypropylene heat-sealing layer from top to bottom, wherein the aluminum foil layer is attached to the upper surface of the polypropylene heat-sealing layer, polyurethane fibers are attached to the upper surface of the aluminum foil layer, the polyurethane fiber layer is attached to the aluminum foil layer through a modified polyolefin adhesive, the aluminum foil layer is attached to the polypropylene heat-sealing layer through a polyurethane adhesive, and the polyurethane adhesive is a German Weishi corner-group adhesive COSMOPUR 818C German Weishi polyurethane adhesive; the modified polyolefin adhesive comprises the following raw materials in parts by weight:
Figure BDA0002439409730000101
the polyolefin is POE 8180 American Dow polyolefin.
Each part of the modified epoxy resin comprises the following raw materials in parts by weight:
Figure BDA0002439409730000102
the polyurethane prepolymer is a polyurethane prepolymer HC-8799AB produced by Shanghai Hecheng Polymer technology Co., Ltd; the type of the epoxy resin is epoxy resin E44.
The modified epoxy resin is prepared by the following method:
s1, adding epoxy resin, melamine and graphene in parts by weight into a stirring device, heating to 65 ℃, and stirring at a speed of 225r/min for 38min to obtain a mixture A for later use;
s2, adding the polyurethane prepolymer and silicon dioxide into the mixture A obtained in the step S1, heating to 90 ℃, stirring for 25min, adding N, N-dimethylformamide, continuously stirring for 1.5h at the speed of 332r/min, and cooling to obtain the modified epoxy resin.
Each part of the curing agent is a mixture of p-hydroxybenzene sulfonic acid, n-butyl ester, methyl hexahydrophthalic anhydride and tin laurate according to the weight ratio of 0.5:0.7:0.2: 0.9.
Each part of the antioxidant is a mixture of an antioxidant 1010, an antioxidant 168, an antioxidant 2112 and an antioxidant 703 in a weight ratio of 0.5:0.9:0.7: 0.2.
Each part of the defoaming agent is a mixture of polydimethylsiloxane, tributyl phosphate and paraffin according to the weight ratio of 0.7:0.9: 0.2.
Each part of the cross-linking agent is a mixture of melamine, polymethylhydrosiloxane and vinyl triethoxysilane according to the weight ratio of 0.7:0.2: 0.9.
Each part of the solvent is a mixture of acetone, butyl acetate, ethylene oxide and isoamyl acetate according to the weight ratio of 0.5:0.7:0.2: 0.9.
The modified polyolefin adhesive is prepared by the following method:
e1, dispersing the modified epoxy resin, the polyolefin and the dibenzoyl peroxide into a solvent according to the parts by weight, adding the solvent into a reaction device, heating to 85 ℃, and stirring at 375r/min for 25min to obtain a mixture A for later use;
e2, mixing the alpha-methyl styrene dimer, the cross-linking agent and the antioxidant, heating to 45 ℃, and uniformly stirring to obtain a mixture B for later use;
e3, adding the mixture B obtained in the step E2 and a defoaming agent into the mixture A obtained in the step E1, mixing and heating to 85 ℃, stirring at 275r/min for 68min, adding a curing agent, continuing stirring for 45min, cooling to normal temperature, and filtering to obtain a filtrate, namely the modified polyolefin adhesive.
The aluminum-plastic film for lithium battery packaging is prepared by the following steps:
1) taking a polypropylene heat-sealing layer, pasting a polyurethane adhesive layer on the upper surface of the polypropylene heat-sealing layer, and pasting an aluminum foil layer on the polyurethane adhesive layer;
2) pasting a layer of modified polyolefin adhesive on the upper surface of the aluminum foil layer, and pasting a polyurethane fiber layer on the modified polyolefin adhesive layer to obtain an aluminum-plastic film primary product;
3) placing the primary aluminum-plastic film in an oven, heating to 63 ℃, and curing and molding for 4.75 hours;
4) then, the temperature of the oven in the step 3) is increased to 83 ℃ for high-temperature curing molding for 71.5 h;
5) and then, reducing the temperature of the oven in the step 4) to 63 ℃ for low-temperature forming for 64.5 hours to obtain the finished product of the aluminum-plastic film.
Example 3
An aluminum-plastic film for packaging a lithium battery comprises a polyurethane fiber layer, an aluminum foil layer and a polypropylene heat-sealing layer from top to bottom, wherein the aluminum foil layer is attached to the upper surface of the polypropylene heat-sealing layer, polyurethane fibers are attached to the upper surface of the aluminum foil layer, the polyurethane fiber layer is attached to the aluminum foil layer through a modified polyolefin adhesive, the aluminum foil layer is attached to the polypropylene heat-sealing layer through a polyurethane adhesive, and the polyurethane adhesive is a German Weishi corner-group adhesive COSMOPUR 818C German Weishi polyurethane adhesive; the modified polyolefin adhesive comprises the following raw materials in parts by weight:
Figure BDA0002439409730000121
the polyolefin is POE 8180 American Dow polyolefin.
Each part of the modified epoxy resin comprises the following raw materials in parts by weight:
Figure BDA0002439409730000122
Figure BDA0002439409730000131
the polyurethane prepolymer is a polyurethane prepolymer HC-8799AB produced by Shanghai Hecheng Polymer technology Co., Ltd; the type of the epoxy resin is epoxy resin E44.
The modified epoxy resin is prepared by the following method:
s1, adding epoxy resin, melamine and graphene in parts by weight into a stirring device, heating to 70 ℃, and stirring at a speed of 250r/min for 45min to obtain a mixture A for later use;
s2, adding the polyurethane prepolymer and silicon dioxide into the mixture A obtained in the step S1, heating to 100 ℃, stirring for 30min, adding N, N-dimethylformamide, continuously stirring for 2h at the speed of 375r/min, and cooling to obtain the modified epoxy resin.
Each part of the curing agent is a mixture of p-hydroxybenzene sulfonic acid, n-butyl ester, methyl hexahydrophthalic anhydride and tin laurate according to the weight ratio of 0.6:0.8:0.3: 1.0.
Each part of the antioxidant is a mixture of an antioxidant 1010, an antioxidant 168, an antioxidant 2112 and an antioxidant 703 in a weight ratio of 0.6:1.0:0.8: 0.3.
Each part of the defoaming agent is a mixture of polydimethylsiloxane, tributyl phosphate and paraffin according to the weight ratio of 0.8:1.0: 0.3.
Each part of the cross-linking agent is a mixture of melamine, polymethylhydrosiloxane and vinyl triethoxysilane according to the weight ratio of 0.8:0.3: 1.0.
Each part of the solvent is a mixture of acetone, butyl acetate, ethylene oxide and isoamyl acetate according to the weight ratio of 0.6:0.8:0.3: 1.0.
The modified polyolefin adhesive is prepared by the following method:
e1, dispersing the modified epoxy resin, the polyolefin and the dibenzoyl peroxide into a solvent according to the parts by weight, adding the solvent into a reaction device, heating to 90 ℃, and stirring for 30min at the speed of 400r/min to obtain a mixture A for later use;
e2, mixing the alpha-methyl styrene dimer, the cross-linking agent and the antioxidant, heating to 50 ℃, and uniformly stirring to obtain a mixture B for later use;
e3, adding the mixture B obtained in the step E2 and a defoaming agent into the mixture A obtained in the step E1, mixing and heating to 90 ℃, stirring at 300r/min for 75min, adding a curing agent, continuing stirring for 50min, cooling to normal temperature, and filtering to obtain a filtrate, namely the modified polyolefin adhesive.
The aluminum-plastic film for lithium battery packaging is prepared by the following steps:
1) taking a polypropylene heat-sealing layer, pasting a polyurethane adhesive layer on the upper surface of the polypropylene heat-sealing layer, and pasting an aluminum foil layer on the polyurethane adhesive layer;
2) pasting a layer of modified polyolefin adhesive on the upper surface of the aluminum foil layer, and pasting a polyurethane fiber layer on the modified polyolefin adhesive layer to obtain an aluminum-plastic film primary product;
3) placing the primary aluminum-plastic film in an oven, heating to 65 ℃, and curing and molding for 5.0 h;
4) then, the temperature of the oven in the step 3) is increased to 85 ℃ for high-temperature curing molding for 72 hours;
5) and then, reducing the temperature of the oven in the step 4) to 65 ℃ for low-temperature molding for 65 hours to obtain the finished product of the aluminum-plastic film.
Example 4
An aluminum-plastic film for packaging a lithium battery comprises a polyurethane fiber layer, an aluminum foil layer and a polypropylene heat-sealing layer from top to bottom, wherein the aluminum foil layer is attached to the upper surface of the polypropylene heat-sealing layer, polyurethane fibers are attached to the upper surface of the aluminum foil layer, the polyurethane fiber layer is attached to the aluminum foil layer through a modified polyolefin adhesive, the aluminum foil layer is attached to the polypropylene heat-sealing layer through a polyurethane adhesive, and the polyurethane adhesive is a German Weishi corner-group adhesive COSMOPUR 818C German Weishi polyurethane adhesive; the modified polyolefin adhesive comprises the following raw materials in parts by weight:
Figure BDA0002439409730000141
Figure BDA0002439409730000151
the polyolefin is POE 8180 American Dow polyolefin.
Each part of the modified epoxy resin comprises the following raw materials in parts by weight:
Figure BDA0002439409730000152
the polyurethane prepolymer is a polyurethane prepolymer HC-8799AB produced by Shanghai Hecheng Polymer technology Co., Ltd; the type of the epoxy resin is epoxy resin E44.
The modified epoxy resin is prepared by the following method:
s1, adding epoxy resin, melamine and graphene in parts by weight into a stirring device, heating to 75 ℃, and stirring at 275r/min for 52min to obtain a mixture A for later use;
s2, adding the polyurethane prepolymer and silicon dioxide into the mixture A obtained in the step S1, heating to 110 ℃, stirring for 35min, adding N, N-dimethylformamide, continuously stirring for 2.5h at the speed of 407r/min, and cooling to obtain the modified epoxy resin.
Each part of the curing agent is a mixture of p-hydroxybenzene sulfonic acid, n-butyl ester, methyl hexahydrophthalic anhydride and tin laurate according to the weight ratio of 0.7:0.9:0.4: 1.1.
Each part of the antioxidant is a mixture of an antioxidant 1010, an antioxidant 168, an antioxidant 2112 and an antioxidant 703 in a weight ratio of 0.7:1.1:0.9: 0.4.
Each part of the defoaming agent is a mixture of polydimethylsiloxane, tributyl phosphate and paraffin according to the weight ratio of 0.9:1.1: 0.4.
Each part of the cross-linking agent is a mixture of melamine, polymethylhydrosiloxane and vinyl triethoxysilane according to the weight ratio of 0.9:0.4: 1.1.
Each part of the solvent is a mixture of acetone, butyl acetate, ethylene oxide and isoamyl acetate according to the weight ratio of 0.7:0.9:0.4: 1.1.
The modified polyolefin adhesive is prepared by the following method:
e1, dispersing the modified epoxy resin, the polyolefin and the dibenzoyl peroxide into a solvent according to the parts by weight, adding the solvent into a reaction device, heating to 95 ℃, and stirring at 425r/min for 35min to obtain a mixture A for later use;
e2, mixing the alpha-methyl styrene dimer, the cross-linking agent and the antioxidant, heating to 55 ℃, and uniformly stirring to obtain a mixture B for later use;
e3, adding the mixture B obtained in the step E2 and a defoaming agent into the mixture A obtained in the step E1, mixing and heating to 95 ℃, stirring at 275r/min for 82min, adding a curing agent, continuing stirring for 55min, cooling to normal temperature, and filtering to obtain a filtrate, namely the modified polyolefin adhesive.
The aluminum-plastic film for lithium battery packaging is prepared by the following steps:
1) taking a polypropylene heat-sealing layer, pasting a polyurethane adhesive layer on the upper surface of the polypropylene heat-sealing layer, and pasting an aluminum foil layer on the polyurethane adhesive layer;
2) pasting a layer of modified polyolefin adhesive on the upper surface of the aluminum foil layer, and pasting a polyurethane fiber layer on the modified polyolefin adhesive layer to obtain an aluminum-plastic film primary product;
3) placing the primary aluminum-plastic film in an oven, heating to 68 ℃, and curing and molding for 5.25 hours;
4) then, the temperature of the oven in the step 3) is increased to 88 ℃ for high-temperature curing molding for 72.5 h;
5) and then, reducing the temperature of the oven in the step 4) to 68 ℃ for low-temperature forming for 65.5 hours to obtain the finished product of the aluminum-plastic film.
Example 5
An aluminum-plastic film for packaging a lithium battery comprises a polyurethane fiber layer, an aluminum foil layer and a polypropylene heat-sealing layer from top to bottom, wherein the aluminum foil layer is attached to the upper surface of the polypropylene heat-sealing layer, polyurethane fibers are attached to the upper surface of the aluminum foil layer, the polyurethane fiber layer is attached to the aluminum foil layer through a modified polyolefin adhesive, the aluminum foil layer is attached to the polypropylene heat-sealing layer through a polyurethane adhesive, and the polyurethane adhesive is a German Weishi corner-group adhesive COSMOPUR 818C German Weishi polyurethane adhesive; the modified polyolefin adhesive comprises the following raw materials in parts by weight:
Figure BDA0002439409730000171
the polyolefin is POE 8180 American Dow polyolefin.
Each part of the modified epoxy resin comprises the following raw materials in parts by weight:
Figure BDA0002439409730000172
Figure BDA0002439409730000181
the polyurethane prepolymer is a polyurethane prepolymer HC-8799AB produced by Shanghai Hecheng Polymer technology Co., Ltd; the type of the epoxy resin is epoxy resin E44.
The modified epoxy resin is prepared by the following method:
s1, adding epoxy resin, melamine and graphene in parts by weight into a stirring device, heating to 80 ℃, and stirring at the speed of 300r/min for 60min to obtain a mixture A for later use;
s2, adding the polyurethane prepolymer and silicon dioxide into the mixture A obtained in the step S1, heating to 120 ℃, stirring for 40min, adding N, N-dimethylformamide, continuously stirring for 3h at the speed of 450r/min, and cooling to obtain the modified epoxy resin.
Each part of the curing agent is a mixture of p-hydroxybenzene sulfonic acid, n-butyl ester, methyl hexahydrophthalic anhydride and tin laurate according to the weight ratio of 0.8:1.0:0.5: 1.2.
Each part of the antioxidant is a mixture of an antioxidant 1010, an antioxidant 168, an antioxidant 2112 and an antioxidant 703 in a weight ratio of 0.8:1.2:1.0: 0.5.
Each part of the defoaming agent is a mixture of polydimethylsiloxane, tributyl phosphate and paraffin according to the weight ratio of 1.0:1.2: 0.5.
Each part of the cross-linking agent is a mixture of melamine, polymethylhydrosiloxane and vinyl triethoxysilane according to the weight ratio of 1.0:0.5: 1.2.
Each part of the solvent is a mixture of acetone, butyl acetate, ethylene oxide and isoamyl acetate according to the weight ratio of 0.8:1.0:0.5: 1.2.
The modified polyolefin adhesive is prepared by the following method:
e1, dispersing the modified epoxy resin, the polyolefin and the dibenzoyl peroxide into a solvent according to the parts by weight, adding the solvent into a reaction device, heating to 100 ℃, and stirring at 450r/min for 40min to obtain a mixture A for later use;
e2, mixing the alpha-methyl styrene dimer, the cross-linking agent and the antioxidant, heating to 60 ℃, and uniformly stirring to obtain a mixture B for later use;
e3, adding the mixture B obtained in the step E2 and a defoaming agent into the mixture A obtained in the step E1, mixing and heating to 100 ℃, stirring at 350r/min for 90min, adding a curing agent, continuing stirring for 60min, cooling to normal temperature, and filtering to obtain a filtrate, namely the modified polyolefin adhesive.
The aluminum-plastic film for lithium battery packaging is prepared by the following steps:
1) taking a polypropylene heat-sealing layer, pasting a polyurethane adhesive layer on the upper surface of the polypropylene heat-sealing layer, and pasting an aluminum foil layer on the polyurethane adhesive layer;
2) pasting a layer of modified polyolefin adhesive on the upper surface of the aluminum foil layer, and pasting a polyurethane fiber layer on the modified polyolefin adhesive layer to obtain an aluminum-plastic film primary product;
3) placing the primary aluminum-plastic film in an oven, heating to 70 ℃, and curing and molding for 5.5 hours;
4) then, the temperature of the oven in the step 3) is increased to 90 ℃ for high-temperature curing molding for 73 h;
5) and then, reducing the temperature of the oven in the step 4) to 70 ℃ for low-temperature forming for 66 hours to obtain the finished product of the aluminum-plastic film.
Comparative example 1
An aluminum-plastic film for packaging a lithium battery comprises a modified polypropylene layer, an aluminum foil layer and a polypropylene heat-sealing layer from top to bottom, wherein the aluminum foil layer is attached to the upper surface of the polypropylene heat-sealing layer, the modified polypropylene layer is attached to the upper surface of the aluminum foil layer, the modified polypropylene layer is attached to the aluminum foil layer through a modified polyolefin adhesive, the aluminum foil layer is attached to the polypropylene heat-sealing layer through a polyurethane adhesive, and the polyurethane adhesive is a German Weishi angle adhesive COSMOPUR 818C German Weishi polyurethane adhesive; the modified polyolefin adhesive comprises the following raw materials in parts by weight:
Figure BDA0002439409730000191
Figure BDA0002439409730000201
the polyolefin is POE 8180 American Dow polyolefin.
Each part of the modified epoxy resin comprises the following raw materials in parts by weight:
Figure BDA0002439409730000202
the polyurethane prepolymer is a polyurethane prepolymer HC-8799AB produced by Shanghai Hecheng Polymer technology Co., Ltd; the type of the epoxy resin is epoxy resin E44.
The modified epoxy resin is prepared by the following method:
s1, adding epoxy resin, melamine and graphene in parts by weight into a stirring device, heating to 60 ℃, and stirring at a speed of 200r/min for 30min to obtain a mixture A for later use;
s2, adding the polyurethane prepolymer and silicon dioxide into the mixture A obtained in the step S1, heating to 80 ℃, stirring for 20min, adding N, N-dimethylformamide, continuously stirring for 1h at the speed of 300r/min, and cooling to obtain the modified epoxy resin.
Each part of the curing agent is a mixture of p-hydroxybenzene sulfonic acid, n-butyl ester, methyl hexahydrophthalic anhydride and tin laurate according to the weight ratio of 0.4:0.6:0.1: 0.8.
Each part of the antioxidant is a mixture of an antioxidant 1010, an antioxidant 168, an antioxidant 2112 and an antioxidant 703 in a weight ratio of 0.4:0.8:0.6: 0.1.
Each part of the defoaming agent is a mixture of polydimethylsiloxane, tributyl phosphate and paraffin according to the weight ratio of 0.6:0.8: 0.1.
Each part of the cross-linking agent is a mixture of melamine, polymethylhydrosiloxane and vinyl triethoxysilane according to the weight ratio of 0.6:0.1: 0.8.
Each part of the solvent is a mixture of acetone, butyl acetate, ethylene oxide and isoamyl acetate according to the weight ratio of 0.4:0.6:0.1: 0.8.
The modified polyolefin adhesive is prepared by the following method:
e1, dispersing the modified epoxy resin, the polyolefin and the dibenzoyl peroxide into a solvent according to the parts by weight, adding the solvent into a reaction device, heating to 80 ℃, and stirring at 350r/min for 20min to obtain a mixture A for later use;
e2, mixing the alpha-methyl styrene dimer, the cross-linking agent and the antioxidant, heating to 40 ℃, and uniformly stirring to obtain a mixture B for later use;
e3, adding the mixture B obtained in the step E2 and a defoaming agent into the mixture A obtained in the step E1, mixing and heating to 80 ℃, stirring at 250r/min for 60min, adding a curing agent, continuing stirring for 40min, cooling to normal temperature, and filtering to obtain a filtrate, namely the modified polyolefin adhesive.
The aluminum-plastic film for lithium battery packaging is prepared by the following steps:
1) taking a polypropylene heat-sealing layer, pasting a polyurethane adhesive layer on the upper surface of the polypropylene heat-sealing layer, and pasting an aluminum foil layer on the polyurethane adhesive layer;
2) pasting a layer of modified polyolefin adhesive on the upper surface of the aluminum foil layer, and then pasting a modified polypropylene layer on the modified polyolefin adhesive layer to obtain an aluminum-plastic film primary product;
3) placing the primary aluminum-plastic film in an oven, heating to 60 ℃, and curing and molding for 4.5 hours;
4) then, the temperature of the oven in the step 3) is increased to 80 ℃ for high-temperature curing molding for 71 h;
5) and then, reducing the temperature of the oven in the step 4) to 60 ℃ for low-temperature forming for 64h to obtain the finished product of the aluminum-plastic film.
Comparative example 2
An aluminum-plastic film for packaging a lithium battery comprises a polyurethane fiber layer, an aluminum foil layer and a polypropylene heat-sealing layer from top to bottom, wherein the aluminum foil layer is attached to the upper surface of the polypropylene heat-sealing layer, polyurethane fibers are attached to the upper surface of the aluminum foil layer, the polyurethane fiber layer is attached to the aluminum foil layer through a modified polyolefin adhesive, the aluminum foil layer is attached to the polypropylene heat-sealing layer through a polyurethane adhesive, and the polyurethane adhesive is a German Weishi corner-group adhesive COSMOPUR 818C German Weishi polyurethane adhesive; the modified polyolefin adhesive comprises the following raw materials in parts by weight:
Figure BDA0002439409730000221
the polyolefin is POE 8180 American Dow polyolefin.
Each part of the curing agent is a mixture of p-hydroxybenzene sulfonic acid, n-butyl ester, methyl hexahydrophthalic anhydride and tin laurate according to the weight ratio of 0.6:0.8:0.3: 1.0.
Each part of the antioxidant is a mixture of an antioxidant 1010, an antioxidant 168, an antioxidant 2112 and an antioxidant 703 in a weight ratio of 0.6:1.0:0.8: 0.3.
Each part of the defoaming agent is a mixture of polydimethylsiloxane, tributyl phosphate and paraffin according to the weight ratio of 0.8:1.0: 0.3.
Each part of the cross-linking agent is a mixture of melamine, polymethylhydrosiloxane and vinyl triethoxysilane according to the weight ratio of 0.8:0.3: 1.0.
Each part of the solvent is a mixture of acetone, butyl acetate, ethylene oxide and isoamyl acetate according to the weight ratio of 0.6:0.8:0.3: 1.0.
The modified polyolefin adhesive is prepared by the following method:
e1, dispersing epoxy resin, polyolefin and dibenzoyl peroxide into a solvent according to parts by weight, adding the mixture into a reaction device, heating to 90 ℃, and stirring for 30min at a speed of 400r/min to obtain a mixture A for later use;
e2, mixing the alpha-methyl styrene dimer, the cross-linking agent and the antioxidant, heating to 50 ℃, and uniformly stirring to obtain a mixture B for later use;
e3, adding the mixture B obtained in the step E2 and a defoaming agent into the mixture A obtained in the step E1, mixing and heating to 90 ℃, stirring at 300r/min for 75min, adding a curing agent, continuing stirring for 50min, cooling to normal temperature, and filtering to obtain a filtrate, namely the modified polyolefin adhesive.
The aluminum-plastic film for lithium battery packaging is prepared by the following steps:
1) taking a polypropylene heat-sealing layer, pasting a polyurethane adhesive layer on the upper surface of the polypropylene heat-sealing layer, and pasting an aluminum foil layer on the polyurethane adhesive layer;
2) pasting a layer of modified polyolefin adhesive on the upper surface of the aluminum foil layer, and pasting a polyurethane fiber layer on the modified polyolefin adhesive layer to obtain an aluminum-plastic film primary product;
3) placing the primary aluminum-plastic film in an oven, heating to 65 ℃, and curing and molding for 5.0 h;
4) then, the temperature of the oven in the step 3) is increased to 85 ℃ for high-temperature curing molding for 72 hours;
5) and then, reducing the temperature of the oven in the step 4) to 65 ℃ for low-temperature molding for 65 hours to obtain the finished product of the aluminum-plastic film.
Comparative example 3
An aluminum-plastic film for packaging a lithium battery comprises a polyurethane fiber layer, an aluminum foil layer and a polypropylene heat-sealing layer from top to bottom, wherein the aluminum foil layer is attached to the upper surface of the polypropylene heat-sealing layer, polyurethane fibers are attached to the upper surface of the aluminum foil layer, the polyurethane fiber layer is attached to the aluminum foil layer through a modified polyolefin adhesive, the aluminum foil layer is attached to the polypropylene heat-sealing layer through a polyurethane adhesive, and the polyurethane adhesive is a German Weishi corner-group adhesive COSMOPUR 818C German Weishi polyurethane adhesive; the modified polyolefin adhesive comprises the following raw materials in parts by weight:
Figure BDA0002439409730000231
Figure BDA0002439409730000241
the polyolefin is POE 8180 American Dow polyolefin.
Each part of the modified epoxy resin comprises the following raw materials in parts by weight:
Figure BDA0002439409730000242
the polyurethane prepolymer is a polyurethane prepolymer HC-8799AB produced by Shanghai Hecheng Polymer technology Co., Ltd; the type of the epoxy resin is epoxy resin E44.
The modified epoxy resin is prepared by the following method:
s1, adding epoxy resin and melamine into a stirring device according to parts by weight, heating to 80 ℃, and stirring at the speed of 300r/min for 60min to obtain a mixture A for later use;
s2, adding the polyurethane prepolymer and silicon dioxide into the mixture A obtained in the step S1, heating to 120 ℃, stirring for 40min, adding N, N-dimethylformamide, continuously stirring for 3h at the speed of 450r/min, and cooling to obtain the modified epoxy resin.
Each part of the curing agent is a mixture of p-hydroxybenzene sulfonic acid, n-butyl ester, methyl hexahydrophthalic anhydride and tin laurate according to the weight ratio of 0.8:1.0:0.5: 1.2.
Each part of the antioxidant is a mixture of an antioxidant 1010, an antioxidant 168, an antioxidant 2112 and an antioxidant 703 in a weight ratio of 0.8:1.2:1.0: 0.5.
Each part of the defoaming agent is a mixture of polydimethylsiloxane, tributyl phosphate and paraffin according to the weight ratio of 1.0:1.2: 0.5.
Each part of the cross-linking agent is a mixture of melamine, polymethylhydrosiloxane and vinyl triethoxysilane according to the weight ratio of 1.0:0.5: 1.2.
Each part of the solvent is a mixture of acetone, butyl acetate, ethylene oxide and isoamyl acetate according to the weight ratio of 0.8:1.0:0.5: 1.2.
The modified polyolefin adhesive is prepared by the following method:
e1, dispersing the modified epoxy resin, the polyolefin and the dibenzoyl peroxide into a solvent according to the parts by weight, adding the solvent into a reaction device, heating to 100 ℃, and stirring at 450r/min for 40min to obtain a mixture A for later use;
e2, mixing the alpha-methyl styrene dimer, the cross-linking agent and the antioxidant, heating to 60 ℃, and uniformly stirring to obtain a mixture B for later use;
e3, adding the mixture B obtained in the step E2 and a defoaming agent into the mixture A obtained in the step E1, mixing and heating to 100 ℃, stirring at 350r/min for 90min, adding a curing agent, continuing stirring for 60min, cooling to normal temperature, and filtering to obtain a filtrate, namely the modified polyolefin adhesive.
The aluminum-plastic film for lithium battery packaging is prepared by the following steps:
1) taking a polypropylene heat-sealing layer, pasting a polyurethane adhesive layer on the upper surface of the polypropylene heat-sealing layer, and pasting an aluminum foil layer on the polyurethane adhesive layer;
2) pasting a layer of modified polyolefin adhesive on the upper surface of the aluminum foil layer, and pasting a polyurethane fiber layer on the modified polyolefin adhesive layer to obtain an aluminum-plastic film primary product;
3) placing the primary aluminum-plastic film in an oven, heating to 70 ℃, and curing and molding for 5.5 hours;
4) then, the temperature of the oven in the step 3) is increased to 90 ℃ for high-temperature curing molding for 73 h;
5) and then, reducing the temperature of the oven in the step 4) to 70 ℃ for low-temperature forming for 66 hours to obtain the finished product of the aluminum-plastic film.
Comparative example 4
An aluminum-plastic film for packaging a lithium battery comprises a polyurethane fiber layer, an aluminum foil layer and a polypropylene heat-sealing layer from top to bottom, wherein the aluminum foil layer is attached to the upper surface of the polypropylene heat-sealing layer, polyurethane fibers are attached to the upper surface of the aluminum foil layer, the polyurethane fiber layer is attached to the aluminum foil layer through a modified polyolefin adhesive, the aluminum foil layer is attached to the polypropylene heat-sealing layer through a polyurethane adhesive, and the polyurethane adhesive is a German Weishi corner-group adhesive COSMOPUR 818C German Weishi polyurethane adhesive; the modified polyolefin adhesive comprises the following raw materials in parts by weight:
Figure BDA0002439409730000261
the polyolefin is POE 8180 American Dow polyolefin.
Each part of the modified epoxy resin comprises the following raw materials in parts by weight:
Figure BDA0002439409730000262
Figure BDA0002439409730000271
the polyurethane prepolymer is HC-8799AB produced by Shanghai Hecheng polymer technology Co.
The modified epoxy resin is prepared by the following method:
s1, adding epoxy resin, melamine and graphene in parts by weight into a stirring device, heating to 80 ℃, and stirring at the speed of 300r/min for 60min to obtain a mixture A for later use;
s2, adding the polyurethane prepolymer and silicon dioxide into the mixture A obtained in the step S1, heating to 120 ℃, stirring for 40min, adding N, N-dimethylformamide, continuously stirring for 3h at the speed of 450r/min, and cooling to obtain the modified epoxy resin.
Each part of the curing agent is a mixture of p-hydroxybenzene sulfonic acid, n-butyl ester, methyl hexahydrophthalic anhydride and tin laurate according to the weight ratio of 0.8:1.0:0.5: 1.2.
Each part of the antioxidant is a mixture of an antioxidant 1010, an antioxidant 168, an antioxidant 2112 and an antioxidant 703 in a weight ratio of 0.8:1.2:1.0: 0.5.
Each part of the defoaming agent is a mixture of polydimethylsiloxane, tributyl phosphate and paraffin according to the weight ratio of 1.0:1.2: 0.5.
Each part of the cross-linking agent is a mixture of melamine, polymethylhydrosiloxane and vinyl triethoxysilane according to the weight ratio of 1.0:0.5: 1.2.
Each part of the solvent is a mixture of acetone, butyl acetate, ethylene oxide and isoamyl acetate according to the weight ratio of 0.8:1.0:0.5: 1.2.
The modified polyolefin adhesive is prepared by the following method:
e1, dispersing the modified epoxy resin, the polyolefin and the dibenzoyl peroxide into a solvent according to the parts by weight, adding the solvent into a reaction device, heating to 100 ℃, and stirring at 450r/min for 40min to obtain a mixture A for later use;
e2, mixing the alpha-methyl styrene dimer, the cross-linking agent and the antioxidant, heating to 60 ℃, and uniformly stirring to obtain a mixture B for later use;
e3, adding the mixture B obtained in the step E2 and a defoaming agent into the mixture A obtained in the step E1, mixing and heating to 100 ℃, stirring at 350r/min for 90min, adding a curing agent, continuing stirring for 60min, cooling to normal temperature, and filtering to obtain a filtrate, namely the modified polyolefin adhesive.
The aluminum-plastic film for lithium battery packaging is prepared by the following steps:
1) taking a polypropylene heat-sealing layer, pasting a polyurethane adhesive layer on the upper surface of the polypropylene heat-sealing layer, and pasting an aluminum foil layer on the polyurethane adhesive layer;
2) pasting a layer of modified polyolefin adhesive on the upper surface of the aluminum foil layer, and pasting a polyurethane fiber layer on the modified polyolefin adhesive layer to obtain an aluminum-plastic film primary product;
3) and placing the primary aluminum-plastic film product in an oven, heating to 40 ℃, and curing and molding for 144h to obtain a finished aluminum-plastic film product.
The peeling force (GB/T15254-94), elongation at break (GB/T1701-2001), corrosion resistance efficiency (CGSB 31-GP-0A METH 38.2-1957), white line after punching, and whether the heat sealing sol leaks the aluminum surface or not of the aluminum plastic films prepared in examples 1-5 and comparative examples 1-4 were tested, and the results are shown in the following table:
Figure BDA0002439409730000281
as can be seen from the above table, the peeling force, the elongation at break, and the corrosion resistance efficiency of the aluminum-plastic film prepared in the embodiments 1 to 5 of the present invention are significantly improved, and meanwhile, whether the white line and the heat-seal sol leak aluminum after the shell punching is significantly improved, so that the prepared aluminum-plastic film has good barrier property, ductility, and internal corrosion, and in addition, the aluminum-plastic film has the advantages of good aluminum leakage prevention effect of the white line and the heat-seal sol after the shell punching, long service life, and low production cost.
Compared with the example 1, in the comparative example 1, the modified polypropylene layer is used for replacing the polyurethane fiber layer in the preparation of the aluminum-plastic film, and various physical property tests are carried out on the aluminum-plastic film prepared by using the raw materials, so that the analysis shows that the peeling force, the elongation at break and the corrosion resistance efficiency of the aluminum-plastic film are relatively reduced, and the white line and the heat-sealing sol leakage prevention effect after shell punching are relatively weakened; the polyurethane fiber layer is used in the preparation of the aluminum-plastic film, so that the prepared aluminum-plastic film has good stripping force, elongation at break and corrosion resistance efficiency, and meanwhile, the white line and heat-seal sol leakage prevention effect after shell punching are obviously improved, so that the prepared aluminum-plastic film has good barrier property, ductility and internal corrosion, and in addition, the polyurethane fiber layer has the advantages of good white line and heat-seal sol leakage prevention effect after shell punching, long service life and low production cost.
Compared with the example 3, in the comparative example 2, the modified epoxy resin is replaced by the epoxy resin when the modified polyolefin adhesive used for preparing the aluminum-plastic film is prepared, and the aluminum-plastic film prepared by using the raw materials is subjected to various physical property tests, and the analysis shows that the peeling force, the elongation at break and the corrosion resistance efficiency of the aluminum-plastic film are remarkably reduced, and the white line and the heat-sealing sol leakage prevention effect after shell punching are relatively weakened; the modified epoxy resin is adopted when the modified polyolefin adhesive used for preparing the aluminum-plastic film is prepared, so that the prepared aluminum-plastic film has good stripping force, elongation at break and corrosion resistance efficiency, and simultaneously, the white line and the heat-seal sol leakage prevention effect after shell punching are obviously improved, so that the prepared aluminum-plastic film has good barrier property, ductility and internal corrosion, and in addition, the modified polyolefin adhesive also has the advantages of good white line and heat-seal sol leakage prevention effect after shell punching, long service life and low production cost.
Compared with the embodiment 5, in the comparative example 3, the graphene is not added when the modified epoxy resin is added into the modified polyolefin adhesive used for preparing the aluminum-plastic film, and various physical property tests are carried out on the aluminum-plastic film prepared by using the raw materials, so that the analysis shows that the peeling force, the elongation at break and the corrosion resistance efficiency of the aluminum-plastic film are relatively reduced, and the white line and the heat-seal sol leakage prevention effect after shell punching are relatively weakened; the graphene is added when the epoxy resin is modified in the modified polyolefin adhesive used for preparing the aluminum-plastic film, so that the prepared aluminum-plastic film has good stripping force, elongation at break and corrosion resistance efficiency, and meanwhile, the white line after shell punching and the heat-seal collosol aluminum leakage prevention effect are obviously improved, so that the prepared aluminum-plastic film has good barrier property, ductility and internal corrosivity, and in addition, the graphene-based aluminum-plastic film has the good white line after shell punching and heat-seal collosol aluminum leakage prevention effect, and has the advantages of long service life and low production cost.
Compared with the embodiment 5, in the comparative example 4, the aluminum-plastic film prepared by the prior art is cured and formed at the constant temperature of 40 ℃ in the process for preparing the aluminum-plastic film, and various physical property tests are carried out on the aluminum-plastic film prepared by the process, and analysis shows that the peeling force, the elongation at break and the corrosion resistance efficiency of the aluminum-plastic film are relatively reduced, and the white line and the heat-seal sol leakage prevention effect are obviously weakened after shell punching; the invention shows that the existing high-low temperature curing molding is adopted in the process for preparing the aluminum-plastic film, so that the prepared aluminum-plastic film has good stripping force, elongation at break and corrosion resistance efficiency, and simultaneously, the white line and the heat-seal collosol aluminum leakage prevention effect after shell punching can be obviously improved, so that the prepared aluminum-plastic film has good barrier property, ductility and internal corrosion, and in addition, the invention also has the advantages of good white line and heat-seal collosol aluminum leakage prevention effect after shell punching, long service life and low production cost.
The above-described embodiments are preferred implementations of the present invention, and the present invention may be implemented in other ways without departing from the spirit of the present invention.

Claims (10)

1. The utility model provides a lithium cell encapsulation is with plastic-aluminum membrane which characterized in that: the aluminum plastic film comprises a polyurethane fiber layer, an aluminum foil layer and a polypropylene heat sealing layer from top to bottom, wherein the aluminum foil layer is attached to the upper surface of the polypropylene heat sealing layer, polyurethane fibers are attached to the upper surface of the aluminum foil layer, the polyurethane fiber layer is attached to the aluminum foil layer through a modified polyolefin adhesive, the aluminum foil layer is attached to the polypropylene heat sealing layer through a polyurethane adhesive, and the modified polyolefin adhesive comprises the following raw materials in parts by weight:
Figure FDA0002439409720000011
2. the aluminum-plastic film for lithium battery encapsulation according to claim 1, wherein: each part of the modified epoxy resin comprises the following raw materials in parts by weight:
Figure FDA0002439409720000012
3. the aluminum-plastic film for lithium battery encapsulation according to claim 2, wherein: the modified epoxy resin is prepared by the following method:
s1, adding epoxy resin, melamine and graphene in parts by weight into a stirring device, heating to 60-80 ℃, and stirring at the speed of 200-300r/min for 30-60min to obtain a mixture A for later use;
s2, adding the polyurethane prepolymer and silicon dioxide into the mixture A obtained in the step S1, heating to 80-120 ℃, stirring for 20-40min, adding N, N-dimethylformamide, continuously stirring for 1-3h at the speed of 300-450r/min, and cooling to obtain the modified epoxy resin.
4. The aluminum-plastic film for lithium battery encapsulation according to claim 1, wherein: each part of the curing agent is at least one of p-hydroxybenzene sulfonic acid, n-butyl ester, methyl hexahydrophthalic anhydride and tin laurate.
5. The aluminum-plastic film for lithium battery encapsulation according to claim 1, wherein: each part of the antioxidant is at least one of antioxidant 1010, antioxidant 168, antioxidant 619, antioxidant 703, antioxidant BHT, antioxidant 2112 and antioxidant 703.
6. The aluminum-plastic film for lithium battery encapsulation according to claim 1, wherein: each part of the defoaming agent is at least one of polydimethylsiloxane, tributyl phosphate and paraffin.
7. The aluminum-plastic film for lithium battery encapsulation according to claim 1, wherein: each part of the cross-linking agent is a mixture of melamine, polymethylhydrosiloxane and vinyl triethoxysilane according to the weight ratio of 0.6-1.0:0.1-0.5: 0.8-1.2.
8. The aluminum-plastic film for lithium battery encapsulation according to claim 1, wherein: each part of the solvent is at least one of acetone, butyl acetate, ethylene oxide and isoamyl acetate.
9. The aluminum-plastic film for lithium battery pack according to any one of claims 1 to 8, wherein: the modified polyolefin adhesive is prepared by the following method:
e1, dispersing the modified epoxy resin, the polyolefin and the dibenzoyl peroxide into a solvent according to the parts by weight, adding the solvent into a reaction device, heating to 80-100 ℃, and stirring at 450r/min for 20-40min to obtain a mixture A for later use;
e2, mixing the alpha-methyl styrene dimer, the cross-linking agent and the antioxidant, heating to 40-60 ℃, and uniformly stirring to obtain a mixture B for later use;
e3, adding the mixture B obtained in the step E2 and the defoaming agent into the mixture A obtained in the step E1, mixing and heating to 80-100 ℃, stirring for 60-90min at the speed of 250-350r/min, adding the curing agent, continuing stirring for 40-60min, cooling to normal temperature, and filtering to obtain a filtrate, namely the modified polyolefin adhesive.
10. A method for preparing the aluminum plastic film for lithium battery encapsulation according to any one of claims 1 to 8, wherein: the method comprises the following steps:
1) taking a polypropylene heat-sealing layer, pasting a polyurethane adhesive layer on the upper surface of the polypropylene heat-sealing layer, and pasting an aluminum foil layer on the polyurethane adhesive layer;
2) pasting a layer of modified polyolefin adhesive on the upper surface of the aluminum foil layer, and pasting a polyurethane fiber layer on the modified polyolefin adhesive layer to obtain an aluminum-plastic film primary product;
3) placing the primary aluminum-plastic film in an oven, heating to 60-70 ℃, and curing and molding for 4.5-5.5 h;
4) then, the temperature of the oven in the step 3) is increased to 80-90 ℃ for high-temperature curing molding for 71-73 h;
5) and then, reducing the temperature of the oven in the step 4) to 60-70 ℃ for low-temperature forming for 64-66h to obtain the finished product of the aluminum-plastic film.
CN202010261344.3A 2020-04-03 2020-04-03 Aluminum-plastic film for lithium battery packaging and preparation method thereof Active CN111572135B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202010261344.3A CN111572135B (en) 2020-04-03 2020-04-03 Aluminum-plastic film for lithium battery packaging and preparation method thereof
PCT/CN2020/131551 WO2021196669A1 (en) 2020-04-03 2020-11-25 Aluminum plastic film for encapsulating lithium battery and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010261344.3A CN111572135B (en) 2020-04-03 2020-04-03 Aluminum-plastic film for lithium battery packaging and preparation method thereof

Publications (2)

Publication Number Publication Date
CN111572135A true CN111572135A (en) 2020-08-25
CN111572135B CN111572135B (en) 2021-06-08

Family

ID=72122584

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010261344.3A Active CN111572135B (en) 2020-04-03 2020-04-03 Aluminum-plastic film for lithium battery packaging and preparation method thereof

Country Status (2)

Country Link
CN (1) CN111572135B (en)
WO (1) WO2021196669A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021196669A1 (en) * 2020-04-03 2021-10-07 江西明冠锂膜技术有限公司 Aluminum plastic film for encapsulating lithium battery and preparation method thereof
CN115000604A (en) * 2022-06-24 2022-09-02 江西永德立新能源有限公司 Preparation process of aluminum plastic film for lithium battery outer package

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116082996A (en) * 2023-02-03 2023-05-09 厦门大学 Adhesive for aluminum plastic film

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1380626A1 (en) * 2002-07-08 2004-01-14 The Boeing Company Silane triol capped epoxy-adhesion promotor for adhesive-bonded metal substrates
CN103603178A (en) * 2013-11-21 2014-02-26 中国海诚工程科技股份有限公司 Coating for flexible lithium-ion battery membrane, membrane containing same and preparation method thereof
WO2016178117A1 (en) * 2015-05-06 2016-11-10 Semiconductor Energy Laboratory Co., Ltd. Secondary battery and electronic device
CN106346904A (en) * 2016-08-16 2017-01-25 南通樱川薄膜科技有限公司 Aluminum-plastic composite film for lithium ion battery soft package and manufacturing method of aluminum-plastic composite film
CN109337620A (en) * 2018-08-29 2019-02-15 上海恩捷新材料科技有限公司 A kind of aluminum-plastic membrane used for packaging lithium battery adhesive, aluminum plastic film and preparation method thereof
CN210139681U (en) * 2019-05-17 2020-03-13 佛山陀普电子科技有限公司 Aluminum-plastic film structure for anti-corrosion soft package battery

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102019359B1 (en) * 2018-05-02 2019-09-06 주식회사 비티엘첨단소재 Aluminium pouch film for the secondary battery and the manufacturing method thereof
JP6722739B2 (en) * 2018-10-10 2020-07-15 藤森工業株式会社 Method for manufacturing laminated body for battery exterior
CN110744904A (en) * 2019-10-11 2020-02-04 成都新柯力化工科技有限公司 Elastic aluminum plastic film for lithium battery flexible package and preparation method
CN111572135B (en) * 2020-04-03 2021-06-08 江西明冠锂膜技术有限公司 Aluminum-plastic film for lithium battery packaging and preparation method thereof

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1380626A1 (en) * 2002-07-08 2004-01-14 The Boeing Company Silane triol capped epoxy-adhesion promotor for adhesive-bonded metal substrates
CN103603178A (en) * 2013-11-21 2014-02-26 中国海诚工程科技股份有限公司 Coating for flexible lithium-ion battery membrane, membrane containing same and preparation method thereof
WO2016178117A1 (en) * 2015-05-06 2016-11-10 Semiconductor Energy Laboratory Co., Ltd. Secondary battery and electronic device
CN106346904A (en) * 2016-08-16 2017-01-25 南通樱川薄膜科技有限公司 Aluminum-plastic composite film for lithium ion battery soft package and manufacturing method of aluminum-plastic composite film
CN109337620A (en) * 2018-08-29 2019-02-15 上海恩捷新材料科技有限公司 A kind of aluminum-plastic membrane used for packaging lithium battery adhesive, aluminum plastic film and preparation method thereof
CN210139681U (en) * 2019-05-17 2020-03-13 佛山陀普电子科技有限公司 Aluminum-plastic film structure for anti-corrosion soft package battery

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021196669A1 (en) * 2020-04-03 2021-10-07 江西明冠锂膜技术有限公司 Aluminum plastic film for encapsulating lithium battery and preparation method thereof
CN115000604A (en) * 2022-06-24 2022-09-02 江西永德立新能源有限公司 Preparation process of aluminum plastic film for lithium battery outer package
CN115000604B (en) * 2022-06-24 2023-09-15 江西永德立新能源有限公司 Preparation process for lithium battery outer package aluminum plastic film

Also Published As

Publication number Publication date
CN111572135B (en) 2021-06-08
WO2021196669A1 (en) 2021-10-07

Similar Documents

Publication Publication Date Title
CN111572135B (en) Aluminum-plastic film for lithium battery packaging and preparation method thereof
JP3735150B2 (en) Battery separator and battery using the same
CN101914259B (en) Material special for preparing lithium ion battery diaphragm and preparation method thereof
CN103897265B (en) Resin combination and preparation method for solar energy backboard base material
CN108822750A (en) A kind of polyolefin packaging adhesive film with self-repair function
CN113594632A (en) Low-moisture solvent type PVDF coating diaphragm
CN109278384B (en) Heat-conducting sealing material for new energy battery pack and preparation method of heat-conducting sealing material
CN109295512B (en) A kind of preparation method of the polycarbonate of fluorine-containing closed-end structure/polyimide composite fiber film
CN103392238B (en) The solar cell of sealing films for solar cell and use diaphragm seal
CN115353819B (en) Pressure-sensitive adhesive tape for rubber type lithium battery
CN112208167A (en) Aluminum-plastic film for lithium battery packaging
CN104332641A (en) Preparation method of composite bipolar plate
CN110071328B (en) Cross-linked modified polyethyleneimine solid electrolyte and application thereof
CN109370481B (en) Adhesive resin for polymer lithium battery flexible packaging film and preparation method thereof
CN109337612B (en) Enhancement mode POE photovoltaic encapsulation glued membrane
CN115368681B (en) Tear-resistant ethylene propylene diene monomer rubber molding plate and preparation method thereof
CN112952295B (en) Polyolefin-cellulose composite diaphragm and preparation method thereof
CN113140867A (en) Lithium battery diaphragm based on biomass furan-based polymer and preparation method thereof
CN114864989B (en) Membrane electrode frame and preparation method thereof and membrane electrode
CN112646300B (en) Battery cell buffer material, preparation method and application thereof
CN113635578A (en) Preparation method of fuel cell protective film
CN115612429A (en) Adhesive for packaging soft package lithium battery and preparation method thereof
CN116111129B (en) Packaging adhesive film for integrating electrode frame and diaphragm, and preparation method and application thereof
CN115785833B (en) Sealing material for hydrogen fuel cell and preparation method thereof
CN203398172U (en) Special flexible package film for motive power energy storage lithium battery

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant