CN106299163A - Lithium ion battery flexible package internal layer co-extrusion film and preparation method thereof - Google Patents

Lithium ion battery flexible package internal layer co-extrusion film and preparation method thereof Download PDF

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Publication number
CN106299163A
CN106299163A CN201610695216.3A CN201610695216A CN106299163A CN 106299163 A CN106299163 A CN 106299163A CN 201610695216 A CN201610695216 A CN 201610695216A CN 106299163 A CN106299163 A CN 106299163A
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mass parts
screw extruder
ion battery
internal layer
lithium ion
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Inventor
邱晓琳
吴宇涛
陈春阳
唐有凯
陈臻杰
富坚定
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Wuxi Huaying Lithium New Material Co Ltd
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Wuxi Huaying Lithium New Material Co Ltd
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Priority to CN201610695216.3A priority Critical patent/CN106299163A/en
Publication of CN106299163A publication Critical patent/CN106299163A/en
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    • 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
    • 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
    • B32B27/32—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
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • 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
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
    • B32B37/15—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer being manufactured and immediately laminated before reaching its stable state, e.g. in which a layer is extruded and laminated while in semi-molten state
    • B32B37/153—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer being manufactured and immediately laminated before reaching its stable state, e.g. in which a layer is extruded and laminated while in semi-molten state at least one layer is extruded and immediately laminated while in semi-molten state
    • 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
    • B32B7/14—Interconnection of layers using interposed adhesives or interposed materials with bonding properties applied in spaced arrangements, e.g. in stripes
    • 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
    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/08—Copolymers of ethene
    • C08L23/0807—Copolymers of ethene with unsaturated hydrocarbons only containing more than three carbon atoms
    • C08L23/0815—Copolymers of ethene with aliphatic 1-olefins
    • 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
    • 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
    • C08L23/14—Copolymers of propene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
    • 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
    • B32B2250/00—Layers arrangement
    • B32B2250/24—All layers being polymeric
    • 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
    • B32B2270/00—Resin or rubber layer containing a blend of at least two different polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/304—Insulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/558—Impact strength, toughness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/582—Tearability
    • B32B2307/5825—Tear resistant
    • 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
    • B32B2553/00—Packaging equipment or accessories not otherwise provided for
    • 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
    • C08K2201/00—Specific properties of additives
    • C08K2201/011—Nanostructured additives
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2207/00—Properties characterising the ingredient of the composition
    • C08L2207/06—Properties of polyethylene
    • C08L2207/062—HDPE
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Sealing Battery Cases Or Jackets (AREA)
  • Laminated Bodies (AREA)

Abstract

The open a kind of lithium ion battery flexible package internal layer co-extrusion film of the present invention.Specifically, it is the internal layer copolymer membrane that contacts with electrostrictive polymer matter solution of polymer Li-ion battery internal layer.Described lithium ion battery flexible package internal layer co-extrusion film has aluminium foil composite bed, mechanical support layer and Low Temperature Thermal sealing the most successively.The present invention solidifies glue without solvent-borne type, will not be to environment in production process.Use this internal layer copolymer membrane, the service life of polymer Li-ion battery can be extended.

Description

Lithium ion battery flexible package internal layer co-extrusion film and preparation method thereof
Technical field
The present invention relates to a kind of battery flexible packing material and preparation method thereof.Specifically, in being polymer Li-ion battery Internal layer copolymer membrane that layer contacts with electrostrictive polymer matter solution and preparation method thereof.
Background technology
Both knowing about in field of battery production, polymer Li-ion battery has the advantages such as specific energy is high, charge/discharge rates is fast, Therefore, the energy of mobile phone it has been widely used as.But the electrolyte of lithium ion battery is mostly the strongest by corrosivity, permeability Organic solvent is constituted with the lithium salts easily hydrolyzed, can be by the inner layer film oxidation stratification of lithium ion battery.At present, polymer Li-ion The inner layer film of battery flexible packaging film mostly is monolayer-modified film, owing to the barrier property of monolayer-modified film is very poor, it is impossible to effectively stop Corrode the surface of aluminium foil layer because of electrolyte permeability, easily cause aluminium foil layer swelling, and gathering in dry type composite membrane can be dissolved Ammoniacum glue or other binding agent, cause glue-line to be As time goes on gradually reduced with the adhesive strength of aluminium foil interlayer.Cause This, use the polymer Li-ion battery of this lithium ion battery flexible package internal layer co-extrusion film, and service life is short.
It addition, the dry type combined producing tech that the inner layer film of polymer Li-ion battery flexible packaging film mostly uses at present, Owing to this technique uses phenolic resin, epoxy resin, polyurethane adhesive equal solvent type solidification glue, and solvent-borne type solidification glue contains The harmful substances such as machine solvent toluene, ethyl acetate, can be to environment in production process.
Summary of the invention
The problem to be solved in the present invention is to provide a kind of lithium ion battery flexible package internal layer co-extrusion film.This lithium-ion electric Pond flexible package internal layer co-extrusion film, solidifies glue without solvent-borne type, will not be to environment in production process.Use this interior Layer copolymer membrane, can extend the service life of polymer Li-ion battery.
Another problem that the invention solves the problems that is to provide a kind of lithium ion battery flexible package internal layer co-extrusion film prepared Method.
The problems referred to above that the invention solves the problems that are realized by below scheme:
The lithium ion battery flexible package internal layer co-extrusion film feature of the present invention is to be propped up by aluminium foil composite bed, mechanics the most successively Support layer and Low Temperature Thermal sealing are constituted.
Described aluminium foil composite bed contains the raw material of following mass parts:
Atactic copolymerized polypropene 80 ~ 90 mass parts
Polyolefin elastomer or EP rubbers 10 ~ 18 mass parts
Polrvinyl chloride 1 ~ 5 mass parts
Low Density Polyethylene (LDPE) 0 ~ 3 mass parts
Nano grade silica particles 0 ~ 0.3 mass parts
Described mechanical support layer contains the raw material of following mass fraction:
HOPP 80 ~ 85 mass parts
Polyolefin elastomer or ethylene-butene copolymer 15 ~ 20 mass parts
Nano grade silica particles 0.1 ~ 0.5 mass parts
Novel sorbose alcohols transparent agent 0 ~ 3 mass
Dehydroabietic acid 0.1 ~ 0.3 mass parts
Calcium stearate 0.05-0.075 mass parts
Described Low Temperature Thermal sealing contains the raw material of following mass fraction；
Atactic copolymerized polypropene 80 ~ 90 mass parts
Polyolefin elastomer or ethylene-butene copolymer 10 ~ 15 mass parts
Nano grade silica particles 0 ~ 0.5 mass parts.
The feature of the method preparing described lithium ion battery flexible package internal layer co-extrusion film is to comprise the following steps successively:
First by raw materials used for mechanical support layer HOPP, polyolefin elastomer or ethylene-butene copolymer, nanometer titanium dioxide Si powder, novel sorbose alcohols transparent agent, dehydroabietic acid and calcium stearate put in high-speed stirred pot, stir；Afterwards, It is blended at a temperature of 200 ~ 210 DEG C by double screw extruder, obtains the first compound；
Again by raw materials used for aluminium foil composite bed atactic copolymerized polypropene, polyolefin elastomer or EP rubbers, polrvinyl chloride (PVC), Low Density Polyethylene and nano grade silica particles put in another high-speed stirred pot, stir；Afterwards, by double Screw extruder is blended at a temperature of 220 ~ 230 DEG C, obtains the second compound；
Then, by raw materials used for Low Temperature Thermal sealing atactic copolymerized polypropene, polyolefin elastomer or ethylene-butene copolymer with receive Rice SiO 2 powder puts in the 3rd high speed agitated kettle, stirs；Afterwards, by double screw extruder at 180 ~ 190 DEG C At a temperature of be blended, obtain the 3rd compound；
Afterwards, the second compound, the first compound and the 3rd compound are utilized respectively the second screw extruder, the first screw rod squeezes While going out machine and three-screw extruder extrusion, coextrusion casting machine curtain coating co-extrusion become semi-finished product film；Wherein, the second screw rod squeezes Go out the runner temperature of machine, the first screw extruder and three-screw extruder be respectively 200 ~ 210 DEG C, 220 ~ 230 DEG C, 190 ~ 200 DEG C, film mouth temperature is 210 ~ 220 DEG C, the second screw extruder, the first screw extruder and the screw rod of three-screw extruder Rotating speed is respectively 13 ~ 18 revs/min, 40 ~ 50 revs/min and 10 ~ 14 revs/min；
Finally, double finished film carries out high-voltage corona process, forms polar surfaces at aluminium foil composite bed outer surface, and obtaining thickness is The barrier layer of 25 ~ 80 m m；
As can be seen from the above scheme, have the most successively due to the lithium ion battery flexible package internal layer co-extrusion film of the present invention Aluminium foil composite bed, mechanical support layer and Low Temperature Thermal sealing.It is not required to use phenolic resin, epoxy resin, polyurethane adhesive equal solvent type Solidification glue, without harmful substances such as machine solvent toluene, ethyl acetate, thus avoids the dirt in production process brought environment Dye.
It is made up of aluminium foil composite bed, mechanical support layer and Low Temperature Thermal sealing due to the present invention again.By each Rotating fields is set Meter and the modification of formula, improve corrosion resistance, insulating properties, enhance the electrolyte resistance performance of composite membrane, thus extend whole The service life of individual lithium ion battery flexible package aluminum-plastic composite membrane.
Accompanying drawing explanation
Fig. 1 is the lithium ion battery flexible package internal layer co-extrusion membrane structure schematic diagram of the present invention.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is described in further detail.
Embodiment one
As it is shown in figure 1, the lithium ion battery flexible package of the present invention with internal layer co-extrusion film the most successively by aluminium foil composite bed 1, Mechanical support layer 2 and Low Temperature Thermal sealing 3 are constituted.Wherein:
Described aluminium foil composite bed 1 is containing the atactic copolymerized polypropene of 80 mass parts, the polyolefin elastomer of 10 mass parts, 1 mass The polrvinyl chloride of part；
Described mechanical support layer 2 is containing the HOPP of 80 mass parts, the polyolefin elastomer of 15 mass parts, 0.1 mass parts Nano grade silica particles, the dehydroabietic acid of 0.2 mass parts, 0.05 mass parts calcium stearate；
Described Low Temperature Thermal sealing 3 contains atactic copolymerized polypropene and the polyolefin elastomer of 10 mass parts of 80 mass parts.
The method preparing described lithium ion battery flexible package internal layer co-extrusion film comprises the following steps successively:
First by raw materials used for mechanical support layer 2 HOPP, polyolefin elastomer, nano grade silica particles, dehydroabietic acid, Calcium stearate puts in high-speed stirred pot, stirs 4 minutes, mix homogeneously.Afterwards, by double screw extruder the temperature of 200 DEG C Degree is lower to be blended, and obtains the first compound；
Raw materials used for aluminium foil composite bed 1 atactic copolymerized polypropene, polyolefin elastomer and polrvinyl chloride are put into another again at a high speed In agitated kettle, stir 4 minutes, mix homogeneously.Afterwards, it is blended at a temperature of 220 DEG C by double screw extruder, obtains second Compound；
Then, raw materials used for Low Temperature Thermal sealing 3 atactic copolymerized polypropene, polyolefin elastomer are put into the 3rd high speed agitated kettle In, stir 4 minutes, mix homogeneously.Afterwards, it is blended at a temperature of 180 DEG C by double screw extruder, obtains the 3rd mixing Material；
Afterwards, the second compound, the first compound and the 3rd compound are utilized respectively the second screw extruder, the first screw rod squeezes While going out machine and three-screw extruder extrusion, coextrusion casting machine curtain coating co-extrusion become semi-finished product film.Wherein, the second screw rod squeezes The runner temperature going out machine, the first screw extruder and three-screw extruder is respectively 200 DEG C, 210 DEG C, 220 DEG C, film mouth temperature Being 190 DEG C, the screw speed of the second screw extruder, the first screw extruder and three-screw extruder is respectively 13 revs/min Clock, 40 revs/min and 10 revs/min；
Afterwards, double finished film carries out air-cooled cooling at normal temperatures so that it is rapid crystallization, prepares lithium ion battery flexible package with interior Layer co-extrusion film.
Embodiment two
As it is shown in figure 1, the lithium ion battery flexible package of the present invention with aluminum-plastic composite membrane the most successively by aluminium foil composite bed 1, Mechanical support layer 2 and Low Temperature Thermal sealing 3 are constituted.
Wherein: described aluminium foil composite bed 1 containing the atactic copolymerized polypropene of 85 mass parts, the EP rubbers of 15 mass parts, 3 The polrvinyl chloride of mass parts, the Low Density Polyethylene (LDPE) of 2 mass parts, the nano grade silica particles of 0.3 mass parts；
Described mechanical support layer 2 is containing the HOPP of 83 mass parts, the ethylene-butene copolymer of 17 mass parts, 0.3 mass The nano grade silica particles of part, the novel sorbose alcohols transparent agent of 1 mass parts, the dehydroabietic acid of 0.1 mass parts, 0.06 matter The calcium stearate of amount part；
Described Low Temperature Thermal sealing 3 containing the atactic copolymerized polypropene of 85 mass parts, the ethylene-butene copolymer of 13 mass parts, 0.3 The nano grade silica particles of mass parts.
The method preparing described lithium ion battery flexible package internal layer co-extrusion film comprises the following steps successively:
First by raw materials used for mechanical support layer 2 HOPP, polyethylene-butene copolymer, nano grade silica particles, novel Sorbose alcohols transparent agent, dehydroabietic acid, calcium stearate put in high-speed stirred pot, stir 5 minutes, mix homogeneously.Afterwards, logical Cross double screw extruder to be blended at a temperature of 205 DEG C, obtain the first compound；
Again by raw materials used for aluminium foil composite bed 1 atactic copolymerized polypropene, EP rubbers, polrvinyl chloride (PVC), Low Density Polyethylene Put in another high-speed stirred pot with nano grade silica particles, stir 5 minutes, mix homogeneously.Afterwards, twin-screw extrusion is passed through Machine is blended at a temperature of 225 DEG C, obtains the second compound；
Then, by raw materials used for Low Temperature Thermal sealing 3 atactic copolymerized polypropene, ethylene-butene copolymer and nano-silica powder End puts in the 3rd high speed agitated kettle, stirs 5 minutes, mix homogeneously.Afterwards, by double screw extruder the temperature of 185 DEG C Lower blended, obtain the 3rd compound；
Afterwards, the second compound, the first compound and the 3rd compound are utilized respectively the second screw extruder, the first screw rod squeezes While going out machine and three-screw extruder extrusion, coextrusion casting machine curtain coating co-extrusion become semi-finished product film.Wherein, the second screw rod squeezes The runner temperature going out machine, the first screw extruder and three-screw extruder is respectively 200 DEG C, 225 DEG C, 195 DEG C, film mouth temperature Being 215 DEG C, the screw speed of the second screw extruder, the first screw extruder and three-screw extruder is respectively 16 revs/min Clock, 45 revs/min and 12 revs/min；
Afterwards, use double finished film of room temperature wind to carry out air-cooled cooling so that it is rapid crystallization, prepare lithium ion battery flexible package and use Internal layer co-extrusion film.
Embodiment three
As it is shown in figure 1, the lithium ion battery flexible package of the present invention with internal layer co-extrusion film the most successively by aluminium foil composite bed 1, Mechanical support layer 2 and Low Temperature Thermal sealing 3 are constituted.
Wherein: the described aluminium foil composite bed 1 polypropylene containing the atactic copolymerized polypropene of 90 mass parts, 18 mass parts is elastic Body, the polrvinyl chloride of 5 mass parts, the Low Density Polyethylene (LDPE) of 3 mass parts, the nano grade silica particles of 0.2 mass parts；
Described mechanical support layer 2 is containing the HOPP of 85 mass parts, the polyolefin elastomer of 20 mass parts, 0.5 mass parts Nano grade silica particles, the novel sorbose alcohols transparent agent of 3 mass parts, the dehydroabietic acid of 0.3 mass parts, 0.075 matter The calcium stearate of amount part；
Described Low Temperature Thermal sealing 3 is containing the atactic copolymerized polypropene of 90 mass parts, the polyolefin elastomer of 15 mass parts, 0.5 matter The nano grade silica particles of amount part.
The method preparing described lithium ion battery flexible package internal layer co-extrusion film comprises the following steps successively:
First by raw materials used for mechanical support layer 2 HOPP, polyethylene-butene copolymer, nano grade silica particles, novel Sorbose alcohols transparent agent, dehydroabietic acid and calcium stearate put in high-speed stirred pot, stir 6 minutes, mix homogeneously.Afterwards, It is blended at a temperature of 210 DEG C by double screw extruder, obtains the first compound；
Again raw materials used for aluminium foil composite bed 1 atactic copolymerized polypropene, polyolefin elastomer, polrvinyl chloride (PVC), low-density are gathered Ethylene and nano grade silica particles put in another high-speed stirred pot, stir 6 minutes, mix homogeneously.Afterwards, twin screw is passed through Extruder is blended at a temperature of 230 DEG C, obtains the second compound；
Then, raw materials used for Low Temperature Thermal sealing 3 atactic copolymerized polypropene, polyolefin elastomer and nano grade silica particles are thrown Enter in the 3rd high speed agitated kettle, stir 6 minutes, mix homogeneously.Afterwards, it is total at a temperature of 190 DEG C by double screw extruder Mixed, obtain the 3rd compound；
Afterwards, the second compound, the first compound and the 3rd compound are utilized respectively the second screw extruder, the first screw rod squeezes While going out machine and three-screw extruder extrusion, coextrusion casting machine curtain coating co-extrusion become semi-finished product film.Wherein, the second screw rod squeezes The runner temperature going out machine, the first screw extruder and three-screw extruder is respectively 210 DEG C, 230 DEG C, 200 DEG C, film mouth temperature Being 220 DEG C, the screw speed of the second screw extruder, the first screw extruder and three-screw extruder is respectively 18 revs/min Clock, 50 revs/min and 14 revs/min；
Afterwards, use double finished film of room temperature wind to carry out air-cooled cooling so that it is rapid crystallization, prepare lithium ion battery flexible package and use Internal layer co-extrusion film.

Claims (5)

1. lithium ion battery flexible package internal layer co-extrusion film, it is characterised in that the most successively by aluminium foil composite bed (1), mechanics Supporting layer (2) and Low Temperature Thermal sealing (3) are constituted.
Lithium ion battery flexible package internal layer co-extrusion film the most according to claim 1, it is characterised in that described aluminium foil is combined The layer (1) raw material containing following mass parts:
Atactic copolymerized polypropene 80 ~ 90 mass parts
Polyolefin elastomer or EP rubbers 10 ~ 18 mass parts
Polrvinyl chloride 1 ~ 5 mass parts
Low Density Polyethylene (LDPE) 0 ~ 3 mass parts
Nano grade silica particles 0 ~ 0.3 mass parts.
Lithium ion battery flexible package internal layer co-extrusion film the most according to claim 1, it is characterised in that described mechanical support The layer (2) raw material containing following mass fraction:
HOPP 80 ~ 85 mass parts
Polyolefin elastomer or ethylene-butene copolymer 15 ~ 20 mass parts
Nano grade silica particles 0.1 ~ 0.5 mass parts
Novel sorbose alcohols transparent agent 0 ~ 3 mass
Dehydroabietic acid 0.1 ~ 0.3 mass parts
Calcium stearate 0.05-0.075 mass parts.
Lithium ion battery flexible package internal layer co-extrusion film the most according to claim 1, it is characterised in that described low-temperature heat-sealing The layer (3) raw material containing following mass fraction；
Atactic copolymerized polypropene 80 ~ 90 mass parts
Polyolefin elastomer or ethylene-butene copolymer 10 ~ 15 mass parts
Nano grade silica particles 0 ~ 0.5 mass parts.
5. the lithium ion battery flexible package method of internal layer co-extrusion film described in preparation claim 1, it is characterised in that include successively Following steps:
First by mechanical support layer (2) raw materials used HOPP, polyolefin elastomer or ethylene-butene copolymer, nanometer two Silicon oxide powder, novel sorbose alcohols transparent agent, dehydroabietic acid and calcium stearate put in high-speed stirred pot, stir； Afterwards, it is blended at a temperature of 200 ~ 210 DEG C by double screw extruder, obtains the first compound；
Again by aluminium foil composite bed (1) raw materials used atactic copolymerized polypropene, polyolefin elastomer or EP rubbers, polrvinyl chloride (PVC), Low Density Polyethylene and nano grade silica particles put in another high-speed stirred pot, stir；Afterwards, by double Screw extruder is blended at a temperature of 220 ~ 230 DEG C, obtains the second compound；
Then, by Low Temperature Thermal sealing (3) raw materials used atactic copolymerized polypropene, polyolefin elastomer or ethylene-butene copolymer Put in the 3rd high speed agitated kettle with nano grade silica particles, stir；Afterwards, by double screw extruder 180 ~ It is blended at a temperature of 190 DEG C, obtains the 3rd compound；
Afterwards, the second compound, the first compound and the 3rd compound are utilized respectively the second screw extruder, the first screw rod squeezes While going out machine and three-screw extruder extrusion, coextrusion casting machine curtain coating co-extrusion become semi-finished product film；Wherein, the second screw rod squeezes Go out the runner temperature of machine, the first screw extruder and three-screw extruder be respectively 200 ~ 210 DEG C, 220 ~ 230 DEG C, 190 ~ 200 DEG C, film mouth temperature is 210 ~ 220 DEG C, the second screw extruder, the first screw extruder and the screw rod of three-screw extruder Rotating speed is respectively 13 ~ 18 revs/min, 40 ~ 50 revs/min and 10 ~ 14 revs/min；
Finally, double finished film carries out high-voltage corona process, forms polar surfaces at aluminium foil composite bed outer surface, and obtaining thickness is The barrier layer of 25 ~ 80 m m.
CN201610695216.3A 2016-08-22 2016-08-22 Lithium ion battery flexible package internal layer co-extrusion film and preparation method thereof Pending CN106299163A (en)

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CN111152520A (en) * 2019-12-26 2020-05-15 东莞维科电池有限公司 Lithium ion battery packaging film and preparation method thereof
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