CN110497664A - A kind of aluminium plastic composite packaging film and preparation method thereof - Google Patents

A kind of aluminium plastic composite packaging film and preparation method thereof Download PDF

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Publication number
CN110497664A
CN110497664A CN201810479404.1A CN201810479404A CN110497664A CN 110497664 A CN110497664 A CN 110497664A CN 201810479404 A CN201810479404 A CN 201810479404A CN 110497664 A CN110497664 A CN 110497664A
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China
Prior art keywords
layer
plastic composite
packaging film
composite packaging
aluminium
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CN201810479404.1A
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Chinese (zh)
Inventor
程跃
王小明
鲍晋珍
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Shanghai Energy New Materials Technology Co Ltd
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Shanghai Energy New Materials Technology Co Ltd
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Priority to CN201810479404.1A priority Critical patent/CN110497664A/en
Publication of CN110497664A publication Critical patent/CN110497664A/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
    • B32B15/04—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
    • B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • 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
    • 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
    • B32B37/1284—Application of adhesive
    • 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
    • B32B7/10—Interconnection of layers at least one layer having inter-reactive properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
    • B65D65/38—Packaging materials of special type or form
    • B65D65/40—Applications of laminates for particular packaging purposes
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/08—Macromolecular additives
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J123/00—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers
    • C09J123/26—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers modified by chemical after-treatment
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
    • C09J175/04—Polyurethanes
    • C09J175/06—Polyurethanes from 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/31—Heat sealable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion

Abstract

The present invention provides a kind of aluminium plastic composite packaging film and preparation method thereof, and the aluminium plastic composite packaging film successively includes: polyamide laminate film, surface layer adhesive, aluminium foil layer, internal layer adhesive and three-layer co-extruded cast polypropylene layer from surface layer to internal layer；Wherein, the three-layer co-extruded cast polypropylene layer is the three-layer co-extruded film that preparation is processed using coextrusion curtain coating mode, from outside to inside successively includes aluminium foil adhesive layer, refractory layer and hot sealing layer；The polyamide laminate film and the aluminium foil layer and the aluminium foil layer and the three-layer co-extruded cast polypropylene layer are using dry compound machine progress dry laminating.Aluminium plastic composite packaging film of the invention and preparation method thereof, the heat seal strength that aluminium plastic composite packaging film can be improved, the electrolyte resistance corrosive nature for improving aluminium plastic composite packaging film, cell package equipment and packaging technology are required it is lower, to reduce process costs and improve the battery safety that encapsulation is completed.

Description

A kind of aluminium plastic composite packaging film and preparation method thereof
Technical field
The invention belongs to battery packages field, it is related to a kind of aluminium plastic composite packaging film and preparation method thereof.
Background technique
Aluminium plastic composite packaging film is a kind of important manner of packing of lithium battery, opposite aluminum hull, steel shell and cylinder packaging, plastic-aluminum Composite package film, which has, to be had a safety feature, and energy density is high, and internal resistance is small, the advantages such as flexible design.
Currently, aluminum-plastic composite membrane generallys use nylon film (PA) as surface layer, aluminium foil is as middle layer, cast polypropylene Structure of the film (CPP) as internal layer.In aluminum-plastic composite membrane heat seal process, CPP has part thin film melt, and strand occurs It tangles and two layers of aluminum-plastic composite membrane bonds together, if the CPP film for participating in sealing is than relatively thin, only surface layer is melted, It is lower to may result in heat seal strength；If the CPP film for participating in heat-sealing is thicker, remaining CPP melts than relatively thin or whole It wears, then will lead to electrolytic corrosion aluminium foil, cause battery leakage and bulging；Therefore have to lithium battery encapsulation equipment and packaging technology Relatively high requirement, while encapsulating the lithium battery of completion there is also security risks.
Summary of the invention
In view of the foregoing deficiencies of prior art, the purpose of the present invention is to provide a kind of aluminium plastic composite packaging film and its Preparation method, for solving, aluminum-plastic composite membrane heat seal strength is low in the prior art, electrolyte resistance corrosive nature is poor, to cell package Equipment and packaging technology it is more demanding and encapsulation complete battery there are problems that security risk.
In order to achieve the above objects and other related objects, the present invention provides a kind of aluminium plastic composite packaging film, and the plastic-aluminum is multiple Closing packaging film successively includes: that polyamide laminate film, surface layer adhesive, aluminium foil layer, internal layer adhesive and three layers are total from surface layer to internal layer Squish flow prolongs polypropylene layer；Wherein, the three-layer co-extruded cast polypropylene layer is to process the three of preparation using coextrusion curtain coating mode Layer coextruded film successively includes aluminium foil adhesive layer, refractory layer and hot sealing layer from outside to inside；The polyamide laminate film and the aluminium foil Layer and the aluminium foil layer and the three-layer co-extruded cast polypropylene layer are using dry compound machine progress dry laminating.
Preferably, the polyamide laminate film thickness range is 10 μm~50 μm.
Preferably, the surface layer adhesive thickness range is 1 μm~10 μm.
Preferably, the aluminium foil layer thickness range is 15 μm~80 μm.
Preferably, the internal layer adhesive thickness range is 1 μm~10 μm.
Preferably, the three-layer co-extruded cast polypropylene layer thickness range is 15 μm~80 μm.
Preferably, the material of the bonding foil layer includes copolymer polypropylene and adjuvant, and melting range is 110 DEG C~ 160 DEG C, thickness range is 5 μm~20 μm.
Preferably, the material of the refractory layer include poly(4-methyl-1-pentene), homopolypropylene, propylene-based elastomeric and Adjuvant, melting range are 160 DEG C~240 DEG C, and thickness range is 5 μm~30 μm.
Preferably, the material of the hot sealing layer includes copolymer polypropylene, propylene-based elastomeric and adjuvant, hot sealing layer fusing point Range is 110 DEG C~160 DEG C, and thickness range is 5 μm~20 μm.
Preferably, the adjuvant include PPA fluoropolymer additive, antioxidant, slipping agent, opening agent, at One of core agent and antistatic agent or combination.
The present invention also provides a kind of methods for preparing aluminium plastic composite packaging film, comprising the following steps:
S1: polyamide laminate film, surface layer adhesive, aluminium foil layer, internal layer adhesive, bonding foil layer, refractory layer and heat are provided Sealing；
S2: the bonding foil layer, refractory layer and hot sealing layer are prepared into three-layer co-extruded curtain coating by being coextruded curtain coating mode Polypropylene layer；
S3: the outer surface of the aluminium foil layer and inner surface are passivated processing by inactivating treatment liquid；
S4: the surface layer adhesive carries out dry laminating by dry compound machine will be outside the polyamide laminate film and aluminium foil layer Surface recombination；
S5: the internal layer adhesive is total by the aluminium foil layer inner surface and three layers by dry compound machine progress dry laminating It is compound that squish flow prolongs polypropylene layer.
Preferably, further include step S3 before step S2 or step S5 is formed by one in combination before step S 4 Kind.
Preferably, the inactivating treatment liquid includes phosphoric acid, polyacrylic acid and chromic salt, and the aluminium foil layer is outer after drying The range of the chromium adhesion amount of surface and inner surface is 15mg/m2~30mg/m2。
Preferably, the surface layer adhesive is double component polyester system adhesive, and weight proportion is polyester resin: poly- isocyanide Acid esters: ethyl acetate=100:10:40~100:20:50, the range of coating weight is 2g/m after drying2~8g/m2。
Preferably, the internal layer adhesive is maleic anhydride modified polyolefin adhesive, and weight proportion changes for maleic anhydride Property polyolefin: epoxy resin: butanone: cyclohexane=100:1.4:35:5~100:1.5:36:6, it is dry after coating weight range For 2g/m2~8g/m2。
Preferably, the polyamide laminate film includes two-way stretching polyamide film, and thickness range is 10 μm~50 μm, described Aluminium foil layer includes soft aluminium foil, and thickness range is 15 μm~80 μm, the three-layer co-extruded cast polypropylene layer, thickness range 15 μm~80 μm.
Preferably, the thickness of the bonding foil layer in the three-layer co-extruded cast polypropylene layer, refractory layer and hot sealing layer Degree is than being 1:2:1.
Preferably, the thickness range of the bonding foil layer is 5 μm~20 μm, and raw material and weight proportion are that copolymerization is poly- Propylene: fluoropolymer additive PPA: antioxidant: opening slipping agent=96:1:2:1.
Preferably, the thickness range of the refractory layer is 5 μm~30 μm, and raw material and weight proportion are poly- 4- methyl- 1- amylene: propylene-based elastomeric: homopolypropylene: fluoropolymer additive PPA: antioxidant: opening slipping agent=38: 38:20:1:2:1.
Preferably, the thickness range of the hot sealing layer is 5 μm~20 μm, and raw material and weight proportion are copolymerization poly- third Alkene: propylene-based elastomeric: fluoropolymer additive PPA: antioxidant: opening slipping agent=76:20:1:2:1.
As described above, aluminium plastic composite packaging film and preparation method thereof of the invention, has the advantages that raising plastic-aluminum The heat seal strength of composite package film, the electrolyte resistance corrosive nature for improving aluminium plastic composite packaging film, to cell package equipment and envelope It is lower to fill technique requirement, to reduce process costs and improve the battery safety that encapsulation is completed.
Detailed description of the invention
Fig. 1 is shown as the schematic cross-sectional view of aluminium plastic composite packaging film in the embodiment of the present invention one.
Component label instructions
100 polyamide laminate films
200 surface layer adhesives
300 aluminium foil layers
400 internal layer adhesives
500 three-layer co-extruded cast polypropylene layers
501 aluminium foil adhesive layers
502 refractory layers
503 hot sealing layers
S1~S5 step
Specific embodiment
Embodiments of the present invention are illustrated by particular specific embodiment below, those skilled in the art can be by this explanation Content disclosed by book is understood other advantages and efficacy of the present invention easily.
Please refer to Fig. 1.It should be clear that this specification structure depicted in this specification institute accompanying drawings, ratio, size etc., only to cooperate The revealed content of specification is not intended to limit the invention enforceable so that those skilled in the art understands and reads Qualifications, therefore do not have technical essential meaning, the modification of any structure, the change of proportionate relationship or the adjustment of size, In It does not influence still fall in disclosed technology contents under the effect of present invention can be generated and the purpose that can reach It obtains in the range of capable of covering.Meanwhile cited such as "upper", "lower", "left", "right", " centre " and " one " in this specification Term, be merely convenient to being illustrated for narration, rather than to limit the scope of the invention, the change of relativeness or Adjustment, under the content of no substantial changes in technology, when being also considered as the enforceable scope of the present invention.
Embodiment one
As shown in Figure 1, the present invention provides a kind of aluminium plastic composite packaging film, polyamide laminate film is followed successively by internal layer by surface layer 100, surface layer adhesive 200, aluminium foil layer 300, internal layer adhesive 400 and three-layer co-extruded cast polypropylene layer 500.Wherein, described Three-layer co-extruded cast polypropylene layer 500 is to process the three-layer co-extruded film of preparation using coextrusion curtain coating mode, from outside to inside according to Secondary includes aluminium foil adhesive layer 501, refractory layer 502 and hot sealing layer 503.
As an example, the thickness range of the polyamide laminate film 100 is 10 μm~50 μm；The surface layer adhesive 200 Thickness range is 1 μm~10 μm；The thickness range of the aluminium foil layer 300 is 15 μm~80 μm；The thickness of the internal layer adhesive 400 Spending range is 1 μm~10 μm；The thickness range of the three-layer co-extruded cast polypropylene layer 500 is 15 μm~80 μm, wherein described The thickness range of bonding foil layer 501 is 5 μm~20 μm；The thickness range of the refractory layer 502 is 5 μm~30 μm；The heat The thickness range of sealing 503 is 5 μm~20 μm.
As an example, the material of the bonding foil layer 501 includes copolymer polypropylene and adjuvant, melting range 110 DEG C~160 DEG C；The material of the refractory layer 502 includes poly(4-methyl-1-pentene), homopolypropylene, propylene-based elastomeric and institute Adjuvant is stated, melting range is 160 DEG C~240 DEG C；The material of the hot sealing layer 503 includes copolymer polypropylene, Propylene-based elastomers Body and the adjuvant, melting range are 110 DEG C~160 DEG C.The adjuvant includes fluoropolymer additive PPA, resists One of oxidant, slipping agent, opening agent, nucleating agent and antistatic agent or combination.The aluminium plastic composite packaging film is applicable In lithium ion battery.
Embodiment two
The present invention also provides a kind of methods for preparing aluminium plastic composite packaging film, comprising the following steps:
S1: polyamide laminate film, surface layer adhesive, aluminium foil layer, internal layer adhesive, bonding foil layer, refractory layer and heat are provided Sealing；
S2: the bonding foil layer, refractory layer and hot sealing layer are prepared into three-layer co-extruded curtain coating by being coextruded curtain coating mode Polypropylene layer；
S3: the outer surface of the aluminium foil layer and inner surface are passivated processing by inactivating treatment liquid；
S4: the surface layer adhesive carries out dry laminating by dry compound machine will be outside the polyamide laminate film and aluminium foil layer Surface recombination；
S5: the internal layer adhesive is total by the aluminium foil layer inner surface and three layers by dry compound machine progress dry laminating It is compound that squish flow prolongs polypropylene layer.
As an example, the aluminium plastic composite packaging film is applicable to lithium ion battery.
Specifically, step S3 can also be before step S2 or step S5 can also be before step S 4 in above-mentioned steps One of combination is formed by by it.Those skilled in the art can select according to actual needs, herein with no restrictions.Step It is using dry compound machine that the polyamide laminate film and aluminium foil layer outer surface is compound or by the aluminium foil layer in rapid S4 and step S5 Inner surface and three-layer co-extruded cast polypropylene layer carry out the mode of dry laminating, and heat-sealing can be improved and melt Cheng Kuandu, it is strong to improve heat-sealing Degree and electrolyte resistance performance.
As an example, the inactivating treatment liquid includes phosphoric acid, polyacrylic acid and chromic salt, the aluminium foil layer after drying The range of the chromium adhesion amount of outer surface and inner surface is 15mg/m2~30mg/m2, preferably 20mg/m2。
As an example, the surface layer adhesive is double component polyester system adhesive, weight proportion range is polyester resin: Polyisocyanate: ethyl acetate=100:10:40~100:20:50, the range of coating weight is 2g/m after drying2~8g/m2.Institute Stating internal layer adhesive is maleic anhydride modified polyolefin adhesive, and weight proportion is maleic anhydride modified polyolefin: epoxy resin: Butanone: cyclohexane=100:1.4:35:5~100:1.5:36:6, the range of coating weight is 2g/m after drying2~8g/m2.This reality It applies in example, the weight proportion of double component polyester system adhesive is polyester resin: polyisocyanate: ethyl acetate=100:14: 48, coating weight is 4g/m after drying2；The weight proportion of maleic anhydride modified polyolefin adhesive is maleic anhydride modified polyene Hydrocarbon: epoxy resin: butanone: cyclohexane=100:1.43:35.4:5.7, coating weight is 4g/m after drying2。
As an example, the polyamide laminate film includes two-way stretching polyamide film, thickness range is 10 μm~50 μm, institute Stating aluminium foil layer includes soft aluminium foil, and thickness range is 15 μm~80 μm, the three-layer co-extruded cast polypropylene layer, and thickness range is 15 μm~80 μm.In the present embodiment, the two-way stretching polyamide film is with a thickness of 25 μm；The aluminium foil layer is soft aluminium foil, With a thickness of 40 μm；The three-layer co-extruded cast polypropylene layer, with a thickness of 40 μm, wherein the three-layer co-extruded cast polypropylene layer In the bonding foil layer, refractory layer and hot sealing layer thickness ratio be 1:2:1.
Specifically, the thickness range of the bonding foil layer is 5 μm~20 μm, the thickness range of the refractory layer is 5 μm ~30 μm, the thickness range of the hot sealing layer is 5 μm~20 μm.In the present embodiment, the bonding foil layer with a thickness of 10 μm, Its raw material and weight proportion are copolymer polypropylene: fluoropolymer additive PPA: antioxidant: opening slipping agent=96: 1:2:1；The refractory layer with a thickness of 20 μm, raw material and weight proportion are poly(4-methyl-1-pentene): Propylene-based elastomers Body: homopolypropylene: fluoropolymer additive PPA: antioxidant: opening slipping agent=38:38:20:1:2:1；It is described Hot sealing layer with a thickness of 10 μm, raw material and weight proportion are copolymer polypropylene: propylene-based elastomeric: fluoropolymer processing Auxiliary agent PPA: antioxidant: opening slipping agent=76:20:1:2:1.
Illustrate embodiments of the present invention to further strengthen, so that those skilled in the art can be taken off by this specification The content of dew is understood other advantages and efficacy of the present invention more easily, is exemplified below comparative example and is further illustrated.
Comparative example
This comparative example is only that from the distinctive points in embodiment with different three-layer co-extruded cast polypropylene layers, Qi Tabu The rapid and same embodiment of condition, details are not described herein again.
Specifically, in this comparative example three-layer co-extruded cast polypropylene layer with a thickness of 40um, including bonding foil layer, sandwich layer And hot sealing layer, thickness ratio are 1:2:1.Wherein, the thickness of the bonding foil layer, raw material and the same embodiment of weight proportion Two, i.e., the described bonding foil layer is with a thickness of 10um, and raw material and weight proportion are copolymer polypropylene: fluoropolymer processing helps Agent PPA: antioxidant: opening slipping agent=96:1:2:1.The sandwich layer is with a thickness of 20um, raw material and weight proportion Copolymer polypropylene: propylene-based elastomeric: PPA: antioxidant: opening slipping agent=58:38:1:2:1.The thickness of the hot sealing layer For 10um, raw material and weight proportion are copolymer polypropylene: propylene-based elastomeric: PPA: antioxidant: opening slipping agent= 86:10:1:2:1.
The three-layer co-extruded cast polypropylene layer then prepared to embodiment and comparative example carries out heat-sealing test.Seal work Skill setting are as follows: 180 DEG C of temperature, pressure 0.35MPA, the time is respectively 2 seconds, 3 seconds, 4 seconds, 5 seconds, 6 seconds, 7 seconds.
The test result of above-described embodiment and comparative example is compared and is assessed, wherein comparison project has:
Initial heat seal strength situation: initial heat seal strength whether >=50N/15mm
Three-layer co-extruded cast polypropylene layer thickness variation is than situation: thickness change than whether≤30%
The result is as follows:
It can be seen that embodiment compared with comparative example by upper table, using different three-layer co-extruded cast polypropylenes Layer, the three-layer co-extruded cast polypropylene layer in embodiment has preferably initially by the way that the refractory layer is arranged compared with comparative example Heat seal strength and lower thickness change ratio, to improve the heat seal strength and electrolyte resistance corrosivity of aluminium plastic composite packaging film Energy；The hot sealing process section for improving aluminium plastic composite packaging film, it is lower to cell package equipment and packaging technology requirement, to reduce Process costs and the battery safety for improving encapsulation completion.
In conclusion aluminium plastic composite packaging film and preparation method thereof of the invention, can be improved the heat of aluminium plastic composite packaging film Sealing strength, the electrolyte resistance corrosive nature for improving aluminium plastic composite packaging film, cell package equipment and packaging technology are required it is lower, To reduce process costs and improve the battery safety of encapsulation completion.So the present invention effectively overcomes in the prior art Various shortcoming and have high industrial utilization value.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripe The personage for knowing this technology all without departing from the spirit and scope of the present invention, carries out modifications and changes to above-described embodiment.Cause This, institute is complete without departing from the spirit and technical ideas disclosed in the present invention by those of ordinary skill in the art such as At all equivalent modifications or change, should be covered by the claims of the present invention.

Claims (20)

1. a kind of aluminium plastic composite packaging film, which is characterized in that the aluminium plastic composite packaging film successively includes: from surface layer to internal layer
Polyamide laminate film, surface layer adhesive, aluminium foil layer, internal layer adhesive and three-layer co-extruded cast polypropylene layer；Wherein, described three Layer coextrusion casting polypropylene layer is the three-layer co-extruded film that preparation is processed using coextrusion curtain coating mode, successively includes from outside to inside Aluminium foil adhesive layer, refractory layer and hot sealing layer；The polyamide laminate film and the aluminium foil layer and the aluminium foil layer and described three layers are total Squish flow prolongs polypropylene layer and carries out dry laminating using dry compound machine.
2. aluminium plastic composite packaging film according to claim 1, it is characterised in that: the polyamide laminate film thickness range is 10 μm~50 μm.
3. aluminium plastic composite packaging film according to claim 1, it is characterised in that: the surface layer adhesive thickness range is 1 μ M~10 μm.
4. aluminium plastic composite packaging film according to claim 1, it is characterised in that: the aluminium foil layer thickness range be 15 μm~ 80μm。
5. aluminium plastic composite packaging film according to claim 1, it is characterised in that: the internal layer adhesive thickness range is 1 μ M~10 μm.
6. aluminium plastic composite packaging film according to claim 1, it is characterised in that: the three-layer co-extruded cast polypropylene thickness Spending range is 15 μm~80 μm.
7. aluminium plastic composite packaging film according to claim 1, it is characterised in that: the material of the bonding foil layer includes altogether Poly- polypropylene and adjuvant, melting range are 110 DEG C~160 DEG C, and thickness range is 5 μm~20 μm.
8. aluminium plastic composite packaging film according to claim 1, it is characterised in that: the material of the refractory layer includes poly- 4- first Base -1- amylene, homopolypropylene, propylene-based elastomeric and adjuvant, melting range are 160 DEG C~240 DEG C, and thickness range is 5 μ M~30 μm.
9. aluminium plastic composite packaging film according to claim 1, it is characterised in that: the material of the hot sealing layer includes that copolymerization is poly- Propylene, propylene-based elastomeric and adjuvant, hot sealing layer melting range are 110 DEG C~160 DEG C, and thickness range is 5 μm~20 μm.
10. according to the aluminium plastic composite packaging film any in claim 7~9, it is characterised in that: the adjuvant includes containing One of fluoropolymer process aid PPA, antioxidant, slipping agent, opening agent, nucleating agent and antistatic agent or combination.
11. a kind of method for preparing aluminium plastic composite packaging film, which comprises the following steps:
S1: polyamide laminate film, surface layer adhesive, aluminium foil layer, internal layer adhesive, bonding foil layer, refractory layer and hot sealing layer are provided；
S2: the bonding foil layer, refractory layer and hot sealing layer are prepared into three-layer co-extruded curtain coating poly- third by being coextruded curtain coating mode Alkene layer；
S3: the outer surface of the aluminium foil layer and inner surface are passivated processing by inactivating treatment liquid；
S4: the surface layer adhesive carries out dry laminating for the polyamide laminate film and aluminium foil layer outer surface by dry compound machine It is compound；
S5: the internal layer adhesive carries out dry laminating for the aluminium foil layer inner surface and three-layer co-extruded stream by dry compound machine It is compound to prolong polypropylene layer.
12. the method according to claim 11 for preparing aluminium plastic composite packaging film, it is characterised in that: further include that step S3 exists Before step S2 or step S5 is formed by one of combination before step S 4.
13. the method according to claim 11 for preparing aluminium plastic composite packaging film, it is characterised in that: the inactivating treatment liquid Comprising phosphoric acid, polyacrylic acid and chromic salt, the range of the chromium adhesion amount of the outer surface and inner surface of the aluminium foil layer after drying For 15mg/m2~30mg/m2。
14. the method according to claim 11 for preparing aluminium plastic composite packaging film, it is characterised in that: the surface layer adhesive For double component polyester system adhesive, weight proportion range is polyester resin: polyisocyanate: ethyl acetate=100:10:40 ~100:20:50, the range of coating weight is 2g/m after drying2~8g/m2。
15. the method according to claim 11 for preparing aluminium plastic composite packaging film, it is characterised in that: the internal layer adhesive For maleic anhydride modified polyolefin adhesive, weight proportion is maleic anhydride modified polyolefin: epoxy resin: butanone: cyclohexane =100:1.4:35:5~100:1.5:36:6, the range of coating weight is 2g/m after drying2~8g/m2。
16. the method according to claim 11 for preparing aluminium plastic composite packaging film, it is characterised in that: the polyamide laminate film Including two-way stretching polyamide film, thickness range is 10 μm~50 μm, and the aluminium foil layer includes soft aluminium foil, and thickness range is 15 μm~80 μm, the three-layer co-extruded cast polypropylene layer, thickness range is 15 μm~80 μm.
17. the method according to claim 16 for preparing aluminium plastic composite packaging film, it is characterised in that: the three-layer co-extruded stream The thickness ratio for prolonging the bonding foil layer in polypropylene layer, refractory layer and hot sealing layer is 1:2:1.
18. the method according to claim 17 for preparing aluminium plastic composite packaging film, it is characterised in that: the bonding foil layer Thickness range be 5 μm~20 μm, raw material and weight proportion are copolymer polypropylene: fluoropolymer additive PPA: anti- Oxidant: opening slipping agent=96:1:2:1.
19. the method according to claim 17 for preparing aluminium plastic composite packaging film, it is characterised in that: the thickness of the refractory layer Spending range is 5 μm~30 μm, and raw material and weight proportion are poly(4-methyl-1-pentene): propylene-based elastomeric: homopolymerization poly- third Alkene: fluoropolymer additive PPA: antioxidant: opening slipping agent=38:38:20:1:2:1.
20. the method according to claim 17 for preparing aluminium plastic composite packaging film, it is characterised in that: the thickness of the hot sealing layer Spending range is 5 μm~20 μm, and raw material and weight proportion are copolymer polypropylene: propylene-based elastomeric: fluoropolymer processing Auxiliary agent PPA: antioxidant: opening slipping agent=76:20:1:2:1.
CN201810479404.1A 2018-05-18 2018-05-18 A kind of aluminium plastic composite packaging film and preparation method thereof Pending CN110497664A (en)

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