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CN115302883B - Aluminum-plastic composite film and preparation method thereof - Google Patents

Aluminum-plastic composite film and preparation method thereof Download PDF

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Publication number
CN115302883B
CN115302883B CN202210935160.XA CN202210935160A CN115302883B CN 115302883 B CN115302883 B CN 115302883B CN 202210935160 A CN202210935160 A CN 202210935160A CN 115302883 B CN115302883 B CN 115302883B
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China
Prior art keywords
layer
aluminum
potassium titanate
plastic composite
composite film
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CN202210935160.XA
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CN115302883A (en
Inventor
杨慧慧
戴平翔
袁功道
井光辉
徐秋春
戴晓兵
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Jiangxi Shengwei Material Co ltd
Zhuhai Smoothway Electronic Materials Co Ltd
Original Assignee
Jiangxi Shengwei Material Co ltd
Zhuhai Smoothway Electronic Materials Co Ltd
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Priority to CN202210935160.XA priority Critical patent/CN115302883B/en
Publication of CN115302883A publication Critical patent/CN115302883A/en
Priority to PCT/CN2022/143776 priority patent/WO2024027099A1/en
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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
    • 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
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B32B15/085—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B32B15/088—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising polyamides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B32B15/09—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising polyesters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/34—Layered products comprising a layer of synthetic resin comprising polyamides
    • 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
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • 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
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K7/00—Use of ingredients characterised by shape
    • C08K7/02—Fibres or whiskers
    • C08K7/04—Fibres or whiskers inorganic
    • C08K7/08—Oxygen-containing compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K9/00—Use of pretreated ingredients
    • C08K9/04—Ingredients treated with organic substances
    • C08K9/06—Ingredients treated with organic substances with silicon-containing compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/10—Homopolymers or copolymers of propene
    • C08L23/12—Polypropene
    • 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
    • H01M50/117—Inorganic material
    • H01M50/119—Metals
    • 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
    • H01M50/122—Composite material consisting of a mixture of organic and inorganic materials
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/116—Primary casings; Jackets or wrappings characterised by the material
    • H01M50/124—Primary casings; Jackets or wrappings characterised by the material having a layered structure
    • H01M50/1243—Primary casings; Jackets or wrappings characterised by the material having a layered structure characterised by the internal coating on the casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/116—Primary casings; Jackets or wrappings characterised by the material
    • H01M50/124—Primary casings; Jackets or wrappings characterised by the material having a layered structure
    • H01M50/126—Primary casings; Jackets or wrappings characterised by the material having a layered structure comprising three or more layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2457/00—Electrical equipment
    • B32B2457/10—Batteries
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2203/00—Applications
    • C08L2203/16—Applications used for films
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2203/00—Applications
    • C08L2203/20—Applications use in electrical or conductive gadgets
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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  • Chemical & Material Sciences (AREA)
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  • General Chemical & Material Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Composite Materials (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)

Abstract

The invention discloses an aluminum-plastic composite film and a preparation method thereof, the aluminum-plastic composite film comprises an aluminum foil layer, a protective layer and a sealing layer, the sealing layer comprises a middle layer, a heat sealing layer and an adhesive layer, the adhesive layer is bonded with the aluminum foil layer, the raw material for preparing the adhesive layer comprises 5-15% of modified potassium titanate whiskers by mass percent, and the potassium titanate whiskers are treated by a methyl acetyl silane coupling agent and/or an epoxy functional group silane coupling agent to prepare the modified potassium titanate whiskers. The aluminum-plastic composite film is characterized in that 5-15% of modified potassium titanate whiskers are introduced into an adhesive layer bonded with an aluminum foil layer, and the potassium titanate whiskers are subjected to silanization treatment by a methyl acetyl silane coupling agent and/or an epoxy functional group silane coupling agent, so that the electrolyte resistance can be improved by introducing the modified potassium titanate whiskers with specific content, and after the potassium titanate whiskers are subjected to silanization treatment, the compatibility with the adhesive layer is improved, the adhesive effect with the aluminum foil layer cannot be weakened, and the better electrolyte resistance can be realized.

Description

Aluminum-plastic composite film and preparation method thereof
Technical Field
The invention relates to the technical field of lithium battery packaging, in particular to an aluminum-plastic composite film and a preparation method thereof.
Background
Lithium ion batteries are widely applied to new energy systems in the aspects of digital code, vehicles, military affairs and energy storage, and at present, the lithium ion battery flexible packaging film is mainly applied to an aluminum-plastic composite film which is composed of an outer nylon protective layer, a middle aluminum layer and an inner CPP (polypropylene) layer. The electrolyte of the lithium ion battery consists of an organic solvent with extremely strong permeability, lithium hexafluorophosphate, lithium hexafluoroborate and the like which are very easy to hydrolyze, when the electrolyte is contacted with the inner layer of the aluminum plastic film, the inner layer of the film is easy to swell and corrode by the electrolyte, and the electrolyte resistance of the aluminum plastic film, particularly the electrolyte resistance, is an important index for determining the performance of the lithium battery. The polypropylene film generally comprises a heat sealing layer, a core layer and an adhesive layer, wherein the adhesive layer is bonded with the aluminum foil, so that the requirement on the electrolyte resistance of the adhesive layer is relatively strict, and the problem to be solved at present is also solved.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide an aluminum-plastic composite film and a preparation method thereof, wherein the aluminum-plastic composite film can realize better adhesive force and electrolyte resistance.
In order to achieve the purpose, the invention discloses an aluminum-plastic composite film, which comprises an aluminum foil layer, a protective layer arranged on one side of the aluminum foil layer, and a sealing layer arranged on the other side of the aluminum foil layer,
the sealing layer comprises a middle layer, a heat sealing layer arranged on one side of the middle layer and an adhesive layer arranged on the other side of the middle layer, the adhesive layer is bonded with the aluminum foil layer,
the preparation raw material of the bonding layer comprises 5-15% of modified potassium titanate whisker by mass percent, and the potassium titanate whisker is processed by a methylacetyl silane coupling agent and/or an epoxy functional group silane coupling agent to prepare the modified potassium titanate whisker.
Compared with the prior art, the aluminum-plastic composite film has the advantages that 5-15% of modified potassium titanate whiskers are introduced into the bonding layer bonded with the aluminum foil layer, the modified potassium titanate whiskers are obtained by silanizing the potassium titanate whiskers through the methyl acetyl silane coupling agent and/or the epoxy functional group silane coupling agent, the electrolyte resistance can be improved by introducing the modified potassium titanate whiskers with specific content, the compatibility with the bonding layer is improved after silanization treatment of the potassium titanate whiskers, the bonding effect with the aluminum foil layer cannot be weakened, and the better electrolyte resistance can be realized.
It is understood that the modified potassium titanate whisker accounts for 5-15% of the mass of the bonding layer, and the content of the modified potassium hexatitanate whisker is higher, which can cause the content of maleic anhydride grafted modified polypropylene to be lower, further reduce the composite strength between the modified polypropylene and an aluminum foil, facilitate the permeation of electrolyte and have poor electrolyte resistance; if the content of the modified potassium hexatitanate whisker is low, the effect of the resistance to the electrolyte solution is not obtained, and it is needless to say that the variation within the above range is within the scope of the present invention.
Preferably, the potassium titanate whisker is at least one selected from potassium tetratitanate whisker or potassium hexatitanate whisker, in one embodiment, the potassium titanate crystal is potassium tetratitanate whisker or potassium hexatitanate whisker; in another embodiment, the potassium titanate crystals are a mixture of potassium tetratitanate whiskers and potassium hexatitanate whiskers.
Preferably, the raw materials for preparing the bonding layer comprise, by mass, 5-15% of modified potassium titanate whiskers, 80-94% of polypropylene and 1-5% of nucleating agents. Preferably, the content of the modified potassium titanate whisker can be, but is not limited to, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%; the polypropylene content may be, but is not limited to, 80%, 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%; the content of the nucleating agent can be, but is not limited to, 1%, 2%, 3%, 4%, 5%.
Preferably, the polypropylene is selected from maleic anhydride graft modified polypropylene, and the electrolyte resistance can be further improved due to the introduction of maleic anhydride groups.
Preferably, the preparation material of the middle layer comprises homopolymerized polypropylene and propylene-ethylene copolymer elastomer. The defect of insufficient toughness of the homo-polypropylene can be overcome by adding the propylene-ethylene copolymer elastomer, and the impact resistance of the sealing layer is improved. Further, the mass ratio of the homopolypropylene to the elastomer is 90.
Preferably, the preparation material of the heat sealing layer comprises random copolymer polypropylene and anti-blocking master batch. Further, the mass ratio of the random copolymer polypropylene and the antiblocking master batch is 98, but not limited to this ratio.
Preferably, the protective layer is selected from a nylon film and/or a PET film, and when the protective layer includes both the nylon film and the PET film, the compressive strength thereof is more excellent.
Correspondingly, the invention also provides a preparation method of the aluminum-plastic composite film, which comprises the following steps:
(1) Performing silanization treatment on potassium titanate crystals by adopting a methyl acetyl silane coupling agent and/or an epoxy functional group silane coupling agent to obtain modified potassium titanate whiskers;
(2) Preparing a bonding layer preparation material, a middle layer preparation material and a heat sealing layer preparation material containing the modified potassium titanate whisker by extrusion to prepare a sealing layer;
(3) Compounding a protective layer on the dumb surface of the aluminum foil;
(4) And (4) compounding a sealing layer on the bright surface of the aluminum foil to obtain the aluminum-plastic packaging film.
Preferably, before the step (3), a passivation solution is used for performing double-sided passivation on the aluminum foil, wherein the passivation solution comprises chromium nitrate, water-based epoxy resin and phosphoric acid. Further, the chromium nitrate, the aqueous epoxy resin and the water were mixed in a ratio of 2:5:93, then regulating the pH value to 3 by using phosphoric acid, and greatly improving the corrosion resistance of the aluminum foil treated by the passivation solution.
Preferably, the preparation of the modified potassium titanate whisker comprises the following steps:
(1.1) mixing a methyl acetyl silane coupling agent and/or an epoxy functional group silane coupling agent with water and ethanol according to a certain proportion, then adjusting the pH value to 4.0, and standing for a period of time to obtain a silanization mixed solution;
and (1.2) dissolving the potassium titanate whisker in water, adding the silanized mixed solution, stirring, heating to 60-80 ℃, and then carrying out suction filtration, washing and baking to obtain the modified potassium hexatitanate whisker.
Detailed Description
In order to explain technical contents, structural features, and objects and effects of the present invention in detail, the following description is given in detail with reference to the embodiments.
Example 1
A preparation method of an aluminum-plastic composite film comprises the following steps:
(1) Diluting a methyl acetyl silane coupling agent KH-570 with water and ethanol according to the mass ratio of 5;
dissolving potassium hexatitanate whiskers in distilled water according to the mass concentration of 50%, then adding a silanization mixed solution, heating to about 70 ℃, stirring at a high speed for 2 hours, carrying out suction filtration, washing with ethanol, and baking at 80 ℃ for 4 hours to obtain modified potassium hexatitanate whiskers;
(2) The preparation raw materials of the bonding layer are modified potassium hexatitanate whisker, maleic anhydride graft modified polypropylene (Mitsui chemical QF 551) and a nucleating agent (Japanese Adeca NA-21), wherein the maleic anhydride graft modified polypropylene, the modified potassium hexatitanate whisker and the nucleating agent are uniformly mixed according to the mass ratio of 94;
the preparation raw materials of the heat-sealing layer are atactic polypropylene copolymer (PPQF 673K on a Saudi basis) and anti-adhesion master batch (SAB-7203S), wherein the atactic polypropylene copolymer and the anti-adhesion master batch are uniformly mixed according to a mass ratio of 98;
the preparation raw materials of the middle layer are homo-polypropylene (HP 510M of Mediterranean shell) and a propylene and ethylene copolymer elastomer (Exxon Mobil 3000), wherein the homo-polypropylene and the propylene and ethylene copolymer elastomer are uniformly mixed according to a mass ratio of 90;
respectively mixing the preparation raw materials of the adhesive layer, the preparation raw materials of the middle layer and the preparation raw materials of the heat-sealing layer, sucking the mixture into corresponding hoppers, wherein the thicknesses of the three layers are respectively 7, 26 and 7 mu m, quantitatively conveying the mixture through a three-screw, extruding and filtering the mixture through an extruder, casting the mixture from a T-shaped die head, cooling the mixture through a cooling roller, cutting edges, rolling and cutting the mixture again to prepare a polypropylene film, namely a sealing layer, with the thickness of 40 mu m;
(3) Passivating the matte surface and the bright surface of an aluminum foil (Henan Ming Tai, the thickness of which is 40 mu m) by using a passivation solution, specifically, passivating the two surfaces of the aluminum foil by using a passivation solution containing chromium nitrate, aqueous epoxy resin and phosphoric acid, and drying at 150 ℃ for later use, wherein the chromium nitrate, the aqueous epoxy resin and water are in a proportion of 2:5:93, and then regulating the pH value to 3 by using phosphoric acid to obtain passivation solution;
(4) Dry-compounding the passivated aluminum foil matte surface with a protective layer (long plastic nylon film with the thickness of 25 mu m), and curing at 60 ℃ for 3 days to obtain a semi-finished product;
(5) And (4) thermally compounding the bright surface of the aluminum foil in the semi-finished product with the sealing layer to obtain the aluminum-plastic composite film.
Example 2
A preparation method of an aluminum-plastic composite film comprises the following steps:
(1) Diluting a methyl acetyl silane coupling agent KH-570 with water and ethanol according to the mass ratio of 5;
dissolving potassium tetratitanate whisker in distilled water according to the mass concentration of 50%, then adding a silanization mixed solution, heating to about 70 ℃, stirring at a high speed for 2 hours, filtering, washing with ethanol, and baking at 80 ℃ for 4 hours to obtain modified potassium tetratitanate whisker;
(2) The preparation raw materials of the bonding layer are modified potassium tetratitanate whisker, maleic anhydride graft modified polypropylene (Mitsui chemical QF 551) and a nucleating agent (Japanese Adeca NA-21), wherein the maleic anhydride graft modified polypropylene, the modified potassium tetratitanate whisker and the nucleating agent are uniformly mixed according to the mass ratio of 88;
the rest is the same as the embodiment 1, and is not explained again.
Example 3
A preparation method of an aluminum-plastic composite film comprises the following steps:
(1) Diluting a methyl acetyl silane coupling agent KH-570 with water and ethanol according to the mass ratio of 5;
dissolving potassium hexatitanate whiskers in distilled water according to the mass concentration of 50%, then adding a silanization mixed solution, heating to about 70 ℃, stirring at a high speed for 2 hours, carrying out suction filtration, washing with ethanol, and baking at 80 ℃ for 4 hours to obtain modified potassium hexatitanate whiskers;
(2) The preparation raw materials of the bonding layer are modified potassium hexatitanate whisker, maleic anhydride graft modified polypropylene (Mitsui chemical QF 551) and a nucleating agent (Japanese Adeca NA-21), wherein the maleic anhydride graft modified polypropylene, the modified potassium hexatitanate whisker and the nucleating agent are uniformly mixed according to the mass ratio of 83;
the rest is the same as the embodiment 1, and is not explained again.
Example 4
This example 4 is essentially the same as example 1, except that: the coupling agent in example 4 used an epoxy functional silane coupling agent KH-560, while the coupling agent in example 1 used a methyl acetyl silane coupling agent KH-570.
The rest is the same as the embodiment 1, and is not explained again.
Comparative example 1
A preparation method of an aluminum-plastic composite film comprises the following steps:
(1) The preparation raw materials of the bonding layer are potassium hexatitanate whisker, maleic anhydride graft modified polypropylene (Mitsui chemical QF 551) and a nucleating agent (Japanese Addic NA-21), wherein the maleic anhydride graft modified polypropylene, the potassium hexatitanate whisker and the nucleating agent are uniformly mixed according to the mass ratio of 94;
the heat-sealing layer is prepared from the raw materials of atactic polypropylene copolymer (Sauter base PPQF 673K) and anti-blocking master batch (SAB-7203S), wherein the atactic polypropylene copolymer and the anti-blocking master batch are uniformly mixed according to the mass ratio of 98;
the preparation raw materials of the middle layer are homo-polypropylene (HP 510M of Mediterranean shell) and a propylene and ethylene copolymer elastomer (Exxon Mobil 3000), wherein the homo-polypropylene and the propylene and ethylene copolymer elastomer are uniformly mixed according to a mass ratio of 90;
respectively mixing the preparation raw materials of the adhesive layer, the preparation raw materials of the middle layer and the preparation raw materials of the heat-sealing layer, sucking the mixture into corresponding hoppers, wherein the thicknesses of the three layers are respectively 7, 26 and 7 mu m, quantitatively conveying the mixture through a three-screw, extruding and filtering the mixture through an extruder, casting the mixture from a T-shaped die head, cooling the mixture through a cooling roller, cutting edges, rolling and cutting the mixture again to prepare a polypropylene film, namely a sealing layer, with the thickness of 40 mu m;
(3) Passivating both the matte surface and the bright surface of an aluminum foil (Henan Ming Tai, the thickness of which is 40 mu m), specifically, passivating both surfaces of the aluminum foil by adopting a passivating solution containing chromium nitrate, water-based epoxy resin and phosphoric acid, and drying at 150 ℃ for later use, wherein the chromium nitrate, the water-based epoxy resin and water are mixed according to a ratio of 2:5:93, and then regulating the pH value to 3 by using phosphoric acid to obtain passivation solution;
(4) Dry-compounding the passivated aluminum foil matte surface with a protective layer (long plastic nylon film with the thickness of 25 mu m), and curing at 60 ℃ for 3 days to obtain a semi-finished product;
(5) And (4) compounding the bright surface of the aluminum foil in the semi-finished product with the sealing layer by a thermal method to obtain the aluminum-plastic composite film.
Comparative example 2
This comparative example 2 is essentially the same as example 1, except that: in the comparative example 2, maleic anhydride grafted modified polypropylene, modified potassium hexatitanate whisker and nucleating agent are uniformly mixed according to the mass ratio of 79; in example 1, maleic anhydride grafted modified polypropylene, modified potassium hexatitanate whisker and nucleating agent are uniformly mixed according to the mass ratio of 94.
The rest is the same as the embodiment 1, and is not explained again.
Comparative example 3
This comparative example 3 is essentially the same as example 1, except that: the coupling agent in comparative example 3 used aminosilane coupling agent KH550, while the coupling agent in example 1 used methylacetylsilane coupling agent KH-570.
The rest is the same as the embodiment 1, and is not explained again.
The performance test was performed on the aluminum-plastic composite films of examples 1 to 4 and comparative examples 1 to 3:
the sample bar was cut into a width of 15mm and a length of 150mm, and the initial peeling force of CPP/Al was measured, and then placed in a lithium hexafluorophosphate electrolyte solution of 1mol/L and added with 1% water, and then placed in an oven of 85 ℃ and baked for 24 hours, and then the final peeling force (i.e., the electrolyte resistance was measured) of CPP and aluminum foil was measured, and the results are shown in Table 1.
Table 1 results of performance testing
Figure BDA0003782279150000071
Figure BDA0003782279150000081
As can be seen from the data in Table 1, the products obtained in examples 1 to 4 have more excellent electrolyte resistance than the products obtained in comparative examples 1 to 3. The reason is that 5-15% of modified potassium titanate whiskers are introduced into an adhesive layer bonded with an aluminum foil layer in the aluminum-plastic composite film, the modified potassium titanate whiskers are obtained by silanizing the potassium titanate whiskers through a methyl acetyl silane coupling agent and/or an epoxy functional group silane coupling agent, the compatibility of the adhesive layer can be improved by introducing the modified potassium titanate whiskers with specific content, the adhesive layer has a stronger bonding effect with the aluminum foil layer, and electrolyte is difficult to permeate, so that the electrolyte resistance is better.
In comparative example 1, potassium titanate whiskers were not silanized, but the untreated potassium titanate whiskers had poor compatibility with polypropylene, resulting in poor recombination with aluminum foil, and electrolyte was easily permeated, so that electrolyte resistance was poor.
In comparative example 2, 20% of modified potassium hexatitanate whiskers are added, and the content of the modified potassium hexatitanate whiskers is higher, so that the content of maleic anhydride grafted modified polypropylene is lower, the composite strength between the modified polypropylene and an aluminum foil is reduced, and electrolyte is easy to permeate, so that the electrolyte resistance is poor.
In comparative example 3, aminosilane coupling agent is used for silanizing potassium hexatitanate whisker, but experimental results show that the electrolyte resistance is poor, the type of aminosilane coupling agent is not suitable, the surface treatment effect on the potassium hexatitanate whisker is poor, the compatibility with polypropylene is poor, the composite effect with aluminum foil is poor, and the electrolyte is easy to permeate, so the electrolyte resistance is poor.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, therefore, the present invention is not limited by the appended claims.

Claims (10)

1. The aluminum-plastic composite film is characterized by comprising an aluminum foil layer, a protective layer arranged on one side of the aluminum foil layer, a sealing layer arranged on the other side of the aluminum foil layer,
the sealing layer comprises a middle layer, a heat sealing layer arranged on one side of the middle layer and an adhesive layer arranged on the other side of the middle layer, the adhesive layer is bonded with the aluminum foil layer,
the preparation raw material of the bonding layer comprises 5-15% of modified potassium titanate whisker by mass percent, and the potassium titanate whisker is processed by a methylacetyl silane coupling agent and/or an epoxy functional group silane coupling agent to prepare the modified potassium titanate whisker.
2. The aluminum-plastic composite film according to claim 1, wherein the potassium titanate whiskers are at least one selected from potassium tetratitanate whiskers or potassium hexatitanate whiskers.
3. The aluminum-plastic composite film according to claim 1, wherein the raw material for preparing the adhesive layer comprises, by mass, 5-15% of modified potassium titanate whiskers, 80-94% of polypropylene, and 1% -5% of a nucleating agent.
4. The aluminum-plastic composite film according to claim 3, wherein the polypropylene is selected from maleic anhydride graft-modified polypropylene.
5. The aluminum-plastic composite film according to claim 1, wherein the intermediate layer is made of a material comprising homo-polypropylene and propylene-ethylene copolymer elastomer.
6. The aluminum-plastic composite film according to claim 1, wherein the heat seal layer is prepared from materials comprising random copolymer polypropylene and anti-blocking master batch.
7. The aluminum-plastic composite film according to claim 1, wherein the protective layer is selected from a nylon film and/or a PET film.
8. The method for preparing the aluminum-plastic composite film according to any one of claims 1 to 7, comprising the steps of:
(1) Performing silanization treatment on potassium titanate crystals by adopting a methyl acetyl silane coupling agent and/or an epoxy functional group silane coupling agent to obtain modified potassium titanate whiskers;
(2) Preparing a bonding layer preparation material, a middle layer preparation material and a heat sealing layer preparation material containing the modified potassium titanate whiskers by extrusion to prepare a sealing layer;
(3) Compounding a protective layer on the dumb surface of the aluminum foil;
(4) And (4) compounding a sealing layer on the bright surface of the aluminum foil to obtain the aluminum-plastic packaging film.
9. The method for preparing the aluminum-plastic composite film according to claim 8, wherein the preparation of the modified potassium titanate whisker comprises the following steps:
(1.1) mixing a methyl acetyl silane coupling agent and/or an epoxy functional group silane coupling agent with water and ethanol according to a certain proportion, then adjusting the pH value to 4.0, and standing for a period of time to obtain a silanization mixed solution;
and (1.2) dissolving the potassium titanate whiskers in water, adding the silanization mixed solution, stirring, heating to 60-80 ℃, and then carrying out suction filtration, washing and baking to obtain the modified potassium hexatitanate whiskers.
10. The method for preparing the aluminum-plastic composite film according to claim 8, wherein the aluminum foil is subjected to double-sided passivation by using a passivation solution before the step (3), wherein the passivation solution comprises chromium nitrate, water-based epoxy resin and phosphoric acid.
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CN115302883B (en) * 2022-08-04 2023-04-11 江西省盛纬材料有限公司 Aluminum-plastic composite film and preparation method thereof
CN115742489B (en) * 2022-12-15 2023-10-03 江西省盛纬材料有限公司 Thermal aluminum-plastic composite film and preparation method thereof
CN115816954A (en) * 2022-12-19 2023-03-21 江西省盛纬材料有限公司 Smooth aluminum-plastic composite film and preparation method thereof
CN118789903B (en) * 2024-09-11 2025-01-10 宁波时代铝箔科技股份有限公司 Antibacterial composite aluminum foil material and preparation method thereof

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0346149A2 (en) * 1988-06-09 1989-12-13 Tonen Chemical Corporation Thermoplastic resin composition incorporated with whisker and process for producing the same
JPH05214117A (en) * 1992-02-06 1993-08-24 Titan Kogyo Kk Composite material
US5407754A (en) * 1991-06-20 1995-04-18 Titan Kogyo Kabushiki Kaisha Potassium hexatitanate fibers for use as reinforcement
JP2012160279A (en) * 2011-01-31 2012-08-23 Mitsubishi Paper Mills Ltd Separator for lithium secondary battery
CN105504763A (en) * 2014-09-23 2016-04-20 株洲时代新材料科技股份有限公司 Crystal whisker reinforced poly(ether-ether-ketone) composite material and preparation method thereof
CN109494317A (en) * 2018-09-17 2019-03-19 上海恩捷新材料科技有限公司 A kind of aluminum plastic film of electrolyte resistance and preparation method thereof
CN111518479A (en) * 2020-06-28 2020-08-11 胡剑安 Water-resistant high-strength inorganic silicate adhesive and preparation method thereof
CN112701390A (en) * 2021-01-05 2021-04-23 成都新柯力化工科技有限公司 Corrosion-resistant aluminum-plastic film for lithium battery flexible package and preparation method thereof
CN113878963A (en) * 2021-09-26 2022-01-04 珠海市赛纬电子材料股份有限公司 Aluminum-plastic composite film and preparation method thereof
CN114771066A (en) * 2022-05-10 2022-07-22 珠海市赛纬电子材料股份有限公司 Composite layer and preparation method thereof, polypropylene film and lithium battery soft aluminum plastic packaging film

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115302883B (en) * 2022-08-04 2023-04-11 江西省盛纬材料有限公司 Aluminum-plastic composite film and preparation method thereof

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0346149A2 (en) * 1988-06-09 1989-12-13 Tonen Chemical Corporation Thermoplastic resin composition incorporated with whisker and process for producing the same
US5407754A (en) * 1991-06-20 1995-04-18 Titan Kogyo Kabushiki Kaisha Potassium hexatitanate fibers for use as reinforcement
JPH05214117A (en) * 1992-02-06 1993-08-24 Titan Kogyo Kk Composite material
JP2012160279A (en) * 2011-01-31 2012-08-23 Mitsubishi Paper Mills Ltd Separator for lithium secondary battery
CN105504763A (en) * 2014-09-23 2016-04-20 株洲时代新材料科技股份有限公司 Crystal whisker reinforced poly(ether-ether-ketone) composite material and preparation method thereof
CN109494317A (en) * 2018-09-17 2019-03-19 上海恩捷新材料科技有限公司 A kind of aluminum plastic film of electrolyte resistance and preparation method thereof
CN111518479A (en) * 2020-06-28 2020-08-11 胡剑安 Water-resistant high-strength inorganic silicate adhesive and preparation method thereof
CN112701390A (en) * 2021-01-05 2021-04-23 成都新柯力化工科技有限公司 Corrosion-resistant aluminum-plastic film for lithium battery flexible package and preparation method thereof
CN113878963A (en) * 2021-09-26 2022-01-04 珠海市赛纬电子材料股份有限公司 Aluminum-plastic composite film and preparation method thereof
CN114771066A (en) * 2022-05-10 2022-07-22 珠海市赛纬电子材料股份有限公司 Composite layer and preparation method thereof, polypropylene film and lithium battery soft aluminum plastic packaging film

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