CN109817851A - A kind of composite plastic film - Google Patents
A kind of composite plastic film Download PDFInfo
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- CN109817851A CN109817851A CN201811628136.1A CN201811628136A CN109817851A CN 109817851 A CN109817851 A CN 109817851A CN 201811628136 A CN201811628136 A CN 201811628136A CN 109817851 A CN109817851 A CN 109817851A
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- 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
Abstract
The invention discloses a kind of composite plastic films.The composite plastic film includes the outer layer plastic layer for being successively bonded setting, outer adhesive layer, intermediate plastic layer, intermediate adhesive layer and internal layer polyolefin layer；The raw material of the outer layer plastic layer includes nylon material and/or polyester material；Alternatively, the raw material of the outer layer plastic layer is thermoplastic polyurethane elastomer rubber；The material of the intermediate plastic layer includes the combination of one or more of polyimides, poly-vinegar fiber, two vinegar fiber of poly terephthalic acid fourth, poly terephthalic acid propylene glycol vinegar, polyphenylene oxide, polytetrafluoroethylene (PTFE), fluorinated ethylene propylene copolymer, soluble poly tetrafluoroethene, ethylene-tetrafluoroethylene copolymer, Kynoar and polyvinyl fluoride.A kind of composite plastic film of the invention, can be used in the lithium ion battery of aqueous electrolyte, and improve the mouldability and tensile property of battery packaging film.
Description
Technical field
The present invention relates to the plastic-aluminum combined technical field of membrane of power battery Soft Roll more particularly to a kind of composite plastic films.
Background technique
As China's consumption electronic product market tends to be mature, while new electronic consumer products constantly expand downstream and need
It asks, the application market of soft-package battery will remain in the steady growth rate of 12%-15% in consumer market scale, and market very may be used
It sees.
In terms of power battery, China over the next several years new-energy automobile total output be expected to keep average annual 40% or so growth
Rate, meanwhile, with the extensive use of ternary Soft Roll power battery, the soft-package battery of high-energy density will occupy bigger power
Battery Market share and permeability.
Terminal enterprise favors soft-package battery due to following three aspect:
First point, safety.Soft-package battery risk of explosion under upper state is essentially 0, and soft-package battery is in precarious position
Lower can air-blowing cracking.Vehicle crew's sufficient departure time and safe clearance are given.
Second point, high-energy density.Due to the battery of same capacity, Soft Roll is lighter than steel shell by 40% or so, lighter than aluminum hull
20% or so (volume and mass ratio that aluminum plastic film itself occupies in single battery core are greatly lowered)；Lead to battery cell energy
Density and battery system energy density promote 35%-40%.
Thirdly, group efficiency is high.The performance of battery pack follows " short plank law ".It, can under conditions of single battery is done greatly
To greatly reduce the number of battery core in battery pack, to improve the efficiency of integral battery group.
Currently, the encapsulating material that existing flexible-packed battery uses is aluminum-plastic composite membrane, mainstream structure is generally interior
Layer PP+ aluminium layer+outer layer nylon layer.Wherein aluminium layer two sides is coated with adhesive, glues outer layer nylon respectively and internal layer PP, PP play heat-sealing
Effect, effect of the aluminium foil layer as encapsulation isolation air and steam, nylon play surfacecti proteon scratch resistance.
But with the development of battery industry, the battery of more and more types is had already appeared, the biography of battery before starting to overturn
System.For example, allowing use of the water based electrolyte in lithium ion battery to become can under conditions of positive/negative plate does specially treated
Energy.On September 6th, 2017, Univ Maryland-Coll Park USA according to the report, its aqueous electrolyte battery for developing 4.0v for the first time.This allows
Outer packaging material replaces aluminum-plastic composite membrane to become possibility with composite plastic film in flexible package.
But the composite plastic film of lithium ion battery is had not been used in the prior art.
Summary of the invention
In view of above-mentioned defect existing in the prior art, the purpose of the present invention is to propose to a kind of composite plastic film, Neng Gouyong
In the lithium ion battery of aqueous electrolyte, and improve the mouldability and tensile property of battery packaging film.
To achieve the goals above, present invention employs following technical solutions:
A kind of composite plastic film, the composite plastic film include the outer layer plastic layer for being successively bonded setting, outer adhesive layer, in
Between plastic layer, intermediate adhesive layer and internal layer polyolefin layer；
The raw material of the outer layer plastic layer includes nylon material and/or polyester material；Alternatively, the original of the outer layer plastic layer
Material is thermoplastic polyurethane elastomer rubber；
The material of the intermediate plastic layer includes polyimides (PI), poly-vinegar fiber (PET), two vinegar of poly terephthalic acid fourth
Fiber (PBT), poly terephthalic acid propylene glycol vinegar (PTT), polyphenylene oxide, polytetrafluoroethylene (PTFE) (PTFE), fluorinated ethylene propylene copolymerization
Object (FEP), soluble poly tetrafluoroethene (PFA plastics), ethylene-tetrafluoroethylene copolymer (ETFE), Kynoar (PVDF)
With the combination of one or more of polyvinyl fluoride (PVF).
In above-mentioned composite plastic film, outer layer plastic layer plays the role of scratch resistance and protection as protective layer；Centre modeling
The bed of material is that support and barrier layer, internal layer polyolefin layer are used as sealant.
In above-mentioned composite plastic film, when the raw material of outer layer plastic layer is nylon material, outer layer plastic layer can be using double
It is prepared to any one of synchro-draw nylon, bi-directional distributed stretching, curtain coating nylon, the method for blow-molding nylon.It is preferred that double
Outer layer plastic layer is prepared to step drawing nylon method and blow-molding nylon method.It is more preferably prepared by blow-molding nylon method outer
Layer plastic layer.
When the raw material of outer layer plastic layer is polyester material, then it can be prepared using bi-directional synchronization stretched polyester material outer
Layer plastic layer
When the raw material of outer layer plastic layer is that nylon material and polyester material are used in conjunction with, outer layer plastic layer is double-layer structure,
Outer layer is polyester material, and internal layer is nylon material layer, and the two combines either nylon and polyester are compound by adhesive,
It can be double drawings together after slab superposition, finally obtain outer layer plastic layer.
When the raw material of outer layer plastic layer is thermoplastic polyurethane elastomer rubber (TPU), preferably it is thin to make TPU for casting technique
Film is outer layer plastic layer.
In above-mentioned composite plastic film, intermediate plastic layer can be multi-layer co-extruded preparation, be also possible to biaxial tension
Or the method for curtain coating is prepared, this processing method can make scouring depth more preferable.
In above-mentioned composite plastic film, it is preferred that the nylon material includes nylon-6 and/or modification of nylon -6；
The polyester material include polybutylene terephthalate (PBT) (PBT), polyethylene terephthalate (PET),
The combination of one or more of polypropylene terephthalate (PTT) kind polyester and thermoplastic polyurethane.
In above-mentioned composite plastic film, it is preferred that the polyester material is polybutylene terephthalate (PBT) (PBT) and gathers
The blend of ethylene glycol terephthalate (PET)；The usage ratio of both can be adjusted according to the actual situation.
In above-mentioned composite plastic film, it is preferred that when the raw material of the outer layer plastic layer is nylon material and polyester material,
The outer layer plastic layer is double-layer structure, and outer layer is polyester material, and internal layer is nylon material layer.
In above-mentioned composite plastic film, it is preferred that the outer layer plastic layer with a thickness of 10-60 μm；It is preferred that 12-40 μm；
More preferably 15-30 μm.
In above-mentioned composite plastic film, it is preferred that the medial surface of the outer layer plastic layer carries out primary coat or sided corona treatment.
In above-mentioned composite plastic film, it is preferred that the outer adhesive layer is dry type composite layer or hot melt adhesive layer；It is described dry
Glue used in formula composite layer includes one or more of dual-component polyurethane, monocomponent polyurethane and moisture cure urethanes group
It closes.
In above-mentioned composite plastic film, dual-component polyurethane, monocomponent polyurethane and moisture cure urethanes are that this field is normal
Polyurethane can according to need and be selected, preferably polyester-based polyurethane.
Dry type composite layer is that the medial surface after drying glue application with intermediate plastic layer or outer layer plastic layer fits, i.e.,
It can be and glue is coated in intermediate plastic layer or on the medial surface of outer layer plastic layer；Hot melt adhesive layer be in outer layer plastic layer and
Extruding and hot melting glue carries out sandwich compound among intermediate plastic layer.
In the present invention, ecto-entad is set as by the direction of outer layer plastic layer inner layer polyolefin layer.
In above-mentioned composite plastic film, it is preferred that the gluing solid content of glue be 5%-25%, preferably 8%-18%,
More preferably 10%-16%.Here the restriction of the gluing solid content of the raw material glue or hot melt adhesive of external adhesive layer, can
Be conducive to carry out high-speed coating on coating machine.
In above-mentioned composite plastic film, it is preferred that the dry type composite layer with a thickness of 1-10 μm, preferably 2-5 μm, more
Preferably 2.5-3.5 μm.
In above-mentioned composite plastic film, it is preferred that hot melt adhesive used in the hot melt adhesive layer include anhydride modified polyolefin,
The combination of one or more of ethylene propylene diene rubber, SIS, SBR, SBS, SEBS, EVA and TPU particle.
In above-mentioned composite plastic film, it is preferred that the hot melt adhesive layer with a thickness of 2-18 μm, preferably 3-12 μm, more
Preferably 3.5-5 μm.
In above-mentioned composite plastic film, it is preferred that two sides of the intermediate plastic layer carry out primary coat or sided corona treatment；
Here processing mode can make intermediate plastic layer and outer layer plastic layer and internal layer polyolefin layer by outer adhesive layer and in
Between the cohesive force that is bonded of adhesive layer it is stronger.
In above-mentioned composite plastic film, it is preferred that the intermediate plastic layer with a thickness of 10-120 μm, preferably 20-80 μm,
More preferably 25-60 μm.
In above-mentioned composite plastic film, it is preferred that the raw material of the intermediate adhesive layer is polyester adhesive, polyurethane adhesive
Glutinous agent or polyolefin adhesive.
Above-mentioned polyester adhesive, adhesive for polyurethane or polyolefin adhesive can birds of the same feather flock together ammonia for phthalic anhydride kind polyester, polyester
Ester, polypropylene or modified class polypropylene.
In above-mentioned composite plastic film, it is preferred that the raw material of the intermediate adhesive layer is adhesive for polyurethane or polyene
Hydrocarbon adhesive.
In above-mentioned composite plastic film, it is preferred that the raw material of the intermediate adhesive layer is polyolefin adhesive.
In above-mentioned composite plastic film, it is preferred that the intermediate adhesive layer with a thickness of 1-10 μm, preferably 2-5 μm,
More preferably 2.5-3.5 μm.
In above-mentioned composite plastic film, it is preferred that the gluing solid content of the raw material adhesive of the intermediate adhesive layer is
5%-25%；Preferably 8%-18%, more preferably 10%-16%.
In above-mentioned composite plastic film, raw material adhesive can be used roller coating by the way that dry type is compound by intermediate adhesive layer
Mode, preferably net roll coating method, more preferably dimple coating method are coated on intermediate plastic layer or internal layer polyolefin layer；It applies
The temperature of cloth is 60-120 DEG C, preferably 70-100 DEG C, more preferably 80-90 DEG C.
In above-mentioned composite plastic film, internal layer polyolefin layer can directly hot-melt extruded in intermediate plastic layer, extrusion
Thickness can be 20-120 μm, preferably 25-80 μm.
In above-mentioned composite plastic film, according to the thickness and specification of product, it can choose in the painting of the surface of finished composite film
Cloth slipping agent, it is preferred that the outer surface of the outer layer plastic layer of the composite plastic film is further coated with smooth oxidant layer, the smooth oxidant layer
Raw material slipping agent include erucyl amide, oleamide, long-chain fatty acid ester, ethylene bis stearamide (EBS), compound silicone oil,
The combination of one or more of single silicone oil.
The present invention also provides above-mentioned composite plastic films as electrolyte or electrolyte be solid-state or liquid lithium-ion electric
The application of the housing material in pond；
When for liquid, electrolyte is water base-inorganic salt system or without lithium hexafluoro phosphate system.Water base-inorganic salt system or
No lithium hexafluoro phosphate system is the routine of the prior art.
Above-mentioned composite plastic film of the invention is a kind of novel housing material, for water base-inorganic salt electrolyte, is coagulated
The outer packing of the new type lithium ion batteries such as glue solid-state electrolytic solution.There is no the condition of lithium hexafluoro phosphate in electrolyte or electrolyte
Under (lithium hexafluoro phosphate, which meets water, can generate hydrofluoric acid, have strong corrosive, can destroy the structure of battery itself), water vapor rejection is wanted
It asks and substantially reduces, so as to intermediate aluminium layer be replaced with that barrier property is relatively poor but plastic film that elongation percentage is high.In this way
The mouldability of flexible packaging film, draftability can be greatly improved.
The problem of composite plastic film of the invention can solve the following aspects:
First point, due to no longer needing high water vapor barrier property, the aluminium foil in that aluminum plastic film can be substituted for plastic foil,
It there will be no the generation of pinhole (pin hole).Reduce the check cost expended in production process.
Second point does not need the work cleaned, be surface-treated to aluminium foil etc. then due to no longer aluminium foil being needed to support
Make.Reduce a step process, saves production cost.
Thirdly, after replacing aluminium layer using plastics, since the elongation modulability of plastic foil is far longer than metal.Same
Under conditions of thickness (40 μm).The ratio aluminium foil that the elongation percentage of plastic film can much be done is high.Its formative nature (scouring depth performance)
Very big raising is arrived.
, reduce the hardness of film itself at 4th point, the heat-sealing compactness in tab part can be more preferable, prevents the hair of leakage
It is raw.
5th point, it is therefore prevented that aluminium foil uses and " hydrogen embrittlement " phenomenon caused by steam invasion in process in long-time.
Protrusion effect of the invention are as follows:
A kind of composite plastic film of the invention, can be used in the lithium ion battery of aqueous electrolyte, and improve battery packages
The mouldability and tensile property of film.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the composite plastic film of the embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.
Embodiment 1
The present embodiment provides a kind of outsourcings for as the lithium ion battery that electrolyte or electrolyte are solid-state or liquid
The composite plastic film of package material.When for liquid, electrolyte is water base-inorganic salt system or without lithium hexafluoro phosphate system.
The composite plastic film, as shown in Figure 1, including the outer layer plastic layer 1 for being successively bonded setting, outer adhesive layer 2, centre
Plastic layer 3, intermediate adhesive layer 4 and internal layer polyolefin layer 5.
The raw material of the outer layer plastic layer 1 is nylon material, is made into using asynchronous biaxial tension nylon -6.Outer layer plastic
For layer with a thickness of 15 μm, medial surface carries out sided corona treatment.
The material of intermediate plastic layer 3 is polyimides (PI), is prepared by the method for curtain coating.Intermediate plastic layer
With a thickness of 25 μm.Two sides of intermediate plastic layer carry out sided corona treatment and aging maturation.
Conventional two-component polyurethane and conventional moisture cure urethanes are mixed to form solvent glue according to mass ratio 2 to 1, benefit
Gluing is carried out in the corona surface of outer layer plastic layer 1 with anilox roll, the gluing solid content of glue is 25%, and dry glue amount is ensured after drying
In 3-3.5g/ ㎡, 3.5 μm of thickness, drying tunnel obtains outer adhesive layer 2 out, carries out afterwards with intermediate plastic layer 3 compound.
It is glued in the way of net roll roller coating on the face of the intermediate plastic layer 3 of the product after compound, glue is poly-
(maleic anhydride modified polyethylene, is diluted alkene adhesive using gasoline and toluene.Solid content is controlled in 8%-10%),
Dry glue amount is ensured after drying in 3.5-4g/ ㎡, 3.5 μm of thickness, drying obtains intermediate adhesive layer 4, afterwards with internal layer polyolefin layer 5
Carry out it is compound, wherein internal layer polyolefin layer 5 carry out single side corona.
The outer surface of the outer layer plastic layer of the composite plastic film is further coated with smooth oxidant layer, and the raw material of the smooth oxidant layer is refreshing
Lubrication prescription is erucyl amide.
Composite plastic film is obtained after winding, maturation.
Embodiment 2
The present embodiment provides a kind of outsourcings for as the lithium ion battery that electrolyte or electrolyte are solid-state or liquid
The composite plastic film of package material.When for liquid, electrolyte is water base-inorganic salt system or without lithium hexafluoro phosphate system.
The composite plastic film includes the outer layer plastic layer, outer adhesive layer, intermediate plastic layer, intermediate rubber for being successively bonded setting
Adhensive layer and internal layer polyolefin layer.
The raw material of the outer layer plastic layer is polyester material, using asynchronous biaxial tension polybutylene terephthalate (PBT)
(PBT) it is made into the blend of polyethylene terephthalate (PET).With a thickness of 30 μm, medial surface carries out outer layer plastic layer
Sided corona treatment.
The material of intermediate plastic layer includes two vinegar fiber (PBT) of polyimides poly terephthalic acid fourth and poly terephthalic acid
Propylene glycol vinegar (PTT), material proportion are to wait mass ratioes, and intermediate plastic layer is prepared by the method for being overlapped biaxial tension.In
Between plastic layer with a thickness of 60 μm.Two sides of intermediate plastic layer carry out primary coat processing and aging maturation.
Conventional monocomponent polyurethane and conventional moisture cure urethanes are mixed to form solvent glue according to mass ratio 2 to 1, benefit
Gluing is carried out in the corona surface of outer layer plastic layer with anilox roll, the gluing solid content of glue is 16%, and dry glue amount is ensured after drying
In 3-3.5g/ ㎡, 2.5 μm of thickness, carried out after drying tunnel with intermediate plastic layer out compound.
It is glued on the face of the intermediate plastic layer of the product after compound using dimple coating method, glue is polyurethane
Adhesive (solid content is controlled in 10%-16%) ensures dry glue amount in 3.5-4g/ ㎡ after drying, 2.5 μm of thickness, drying obtains
Intermediate adhesive layer carries out compound, wherein internal layer polyolefin layer progress single side primary coat with internal layer polyolefin layer afterwards.
Composite plastic film is obtained after winding, maturation.
Embodiment 3
The present embodiment provides a kind of outsourcings for as the lithium ion battery that electrolyte or electrolyte are solid-state or liquid
The composite plastic film of package material.When for liquid, electrolyte is water base-inorganic salt system or without lithium hexafluoro phosphate system.
The composite plastic film includes the outer layer plastic layer, outer adhesive layer, intermediate plastic layer, intermediate rubber for being successively bonded setting
Adhensive layer and internal layer polyolefin layer.
The raw material of the outer layer plastic layer is and polyester material is used in conjunction with, and outer layer plastic layer is double-layer structure, and outer layer is
Polyester material, internal layer are nylon material layer, and the two combines either nylon and polyester are compound by adhesive, are also possible to
Slab superposition after double drawings together, the present embodiment be superimposed using slab after together it is double drawing be made into.Here nylon is modification of nylon-
6, the polyester material is polybutylene terephthalate (PBT) (PBT) and thermoplastic polyurethane, and dosage is to wait mass ratioes, here
Dosage, which can according to need, to be adjusted.For outer layer plastic layer with a thickness of 12 μm, medial surface carries out primary coat processing.
The material of intermediate plastic layer is polytetrafluoroethylene (PTFE) (PTFE), fluorinated ethylene propylene copolymer (FEP) and soluble poly
Tetrafluoroethene (PFA plastics), material proportion are to wait mass ratioes, and intermediate plastic layer is prepared by multi-layer co-extruded method.In
Between plastic layer with a thickness of 80 μm.Two sides of intermediate plastic layer carry out primary coat processing.
By anhydride modified polyolefin, ethylene propylene diene rubber, SIS, SBR, SBS, SEBS and EVA coextrusion, thickness is squeezed out
3.5-5 μm, outer layer plastic layer and intermediate plastic layer is set to be combined with each other by sandwich compound mode.
It is glued on the face of the intermediate plastic layer of the product after compound using dimple coating method, glue is polyurethane
Adhesive (solid content is controlled in 10%-25%) ensures that dry glue amount in 3.5-4g/ ㎡, 5 μm of thickness, is dried in obtaining after drying
Between adhesive layer, afterwards with internal layer polyolefin layer carry out it is compound, wherein internal layer polyolefin layer carry out single side corona.
The outer surface of the outer layer plastic layer of the composite plastic film is further coated with smooth oxidant layer, and the raw material of the smooth oxidant layer is refreshing
Lubrication prescription is ethylene bis stearamide.
Composite plastic film is obtained after winding, maturation.
Embodiment 4
The present embodiment provides a kind of outsourcings for as the lithium ion battery that electrolyte or electrolyte are solid-state or liquid
The composite plastic film of package material.When for liquid, electrolyte is water base-inorganic salt system or without lithium hexafluoro phosphate system.
The composite plastic film, as shown in Figure 1, including the outer layer plastic layer 1 for being successively bonded setting, outer adhesive layer 2, centre
Plastic layer 3, intermediate adhesive layer 4 and internal layer polyolefin layer 5.
The raw material of the outer layer plastic layer 1 is thermoplastic polyurethane elastomer rubber (TPU).It is made by casting technique
TPU film is outer layer plastic layer 1.For outer layer plastic layer 1 with a thickness of 60 μm, medial surface carries out primary coat processing.
The material of intermediate plastic layer 3 is poly-vinegar fiber (PET), and intermediate plastic layer 3 is prepared by the method for curtain coating.In
Between plastic layer 3 with a thickness of 30 μm.Two sides of intermediate plastic layer 3 carry out primary coat processing.
EVA hot-melt extruded is obtained into outer adhesive layer 2,2-2.5 μm of thickness is squeezed out, outer layer is made by sandwich compound mode
Plastic layer 1 and intermediate plastic layer 3 are combined with each other.
Internal layer polyolefin layer 5, thickness 60-80 μ is prepared in the polyolefin hot-melt extruded that ethylene and propylene graft are copolymerized
M, single side corona；By maleic anhydride modified polyethylene hot-melt extruded, 3-4 μm of thickness is squeezed out, intermediate adhesive layer 4 is obtained, led to
Crossing sandwich compound mode makes internal layer polyolefin layer 5 and intermediate plastic layer 3 be combined with each other.
Composite plastic film is obtained after winding, maturation.
The composite plastic film that 1-4 of the embodiment of the present invention is obtained is compared with conventional aluminum plastic film in the prior art, with
For mold size is 50 × 69mm, the scouring depth depth of general metallo-plastic composite membrane (i.e. conventional aluminum plastic film) 10mm with
Under, and the scouring depth depth of embodiment 1-4 any one composite plastic film can increase by 100% or more, that is, mouldability, draftability
100% or more can be promoted than prior art products
Moreover, novel composite plastic film of the invention, for outside the lithium ion battery of electrolyte of new generation or electrolyte
Packaging, compared to existing aluminum plastic film:
One, aluminium foil is no longer needed to carry out water vapor rejection, to reduce the aluminium foil treatment process in processing procedure.Save processing procedure
Cost.
Two, making technology is enriched, three-layer plastic is compound either compound using dry type, and can be multiple using thermal method
It closes, increases the diversity of composite membrane processing procedure, it is big not as aluminum plastic film before requires to site requirements.
Three, its scouring depth performance is enhanced.Since intermediate aluminium foil is substituted by plastics, its plasticity is greatly strengthened, that is, is rushed
Deep performance.Allow being shaped in order to may of large-scale cylinder or Special-shaped battery.
Four, in the processing procedure of entire composite plastic film, defect is more readily detected out, since the plastic film of use is most
All be it is transparent, the defects of recombination process can more diversified detection and detection, quality is easier to control.
Five, because using plastic film, therefore there is no the influences of pin hole.
Six, the mouldability and tensile property of battery packaging film are improved.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (10)
1. a kind of composite plastic film, it is characterised in that: the composite plastic film includes the outer layer plastic layer for being successively bonded setting, outer glue
Adhensive layer, intermediate plastic layer, intermediate adhesive layer and internal layer polyolefin layer；
The raw material of the outer layer plastic layer includes nylon material and/or polyester material；Alternatively, the raw material of the outer layer plastic layer is
Thermoplastic polyurethane elastomer rubber；
The material of the intermediate plastic layer includes polyimides, poly-vinegar fiber, two vinegar fiber of poly terephthalic acid fourth, gathers to benzene two
Formic acid propylene glycol vinegar, polyphenylene oxide, polytetrafluoroethylene (PTFE), fluorinated ethylene propylene copolymer, soluble poly tetrafluoroethene, ethylene-tetrafluoro
The combination of one or more of ethylene copolymer, Kynoar and polyvinyl fluoride.
2. composite plastic film according to claim 1, it is characterised in that: the nylon material includes nylon-6 and/or changes
Property nylon-6；
The polyester material includes polybutylene terephthalate (PBT), polyethylene terephthalate, poly terephthalic acid third
The combination of one or more of diol-lipid polyester and thermoplastic polyurethane.
3. composite plastic film according to claim 2, it is characterised in that: the polyester material is poly terephthalic acid fourth two
The blend of alcohol ester and polyethylene terephthalate；
Preferably, when the raw material of the outer layer plastic layer is nylon material and polyester material, the outer layer plastic layer is the double-deck knot
Structure, outer layer are polyester material, and internal layer is nylon material layer.
4. composite plastic film according to claim 1, it is characterised in that: the outer layer plastic layer with a thickness of 10-60 μm；
It is preferred that 12-40 μm；More preferably 15-30 μm；
Preferably, the medial surface of the outer layer plastic layer carries out primary coat or sided corona treatment.
5. composite plastic film according to claim 1, it is characterised in that: the outer adhesive layer is dry type composite layer or heat
Melt layer；Glue used in the dry type composite layer includes in dual-component polyurethane, monocomponent polyurethane and moisture cure urethanes
One or more combination；
Preferably, the gluing solid content of glue is 5%-25%, preferably 8%-18%, more preferably 10%-16%.
6. composite plastic film according to claim 5, it is characterised in that: the dry type composite layer with a thickness of 1-10 μm,
Preferably 2-5 μm, more preferably 2.5-3.5 μm；
Preferably, hot melt adhesive used in the hot melt adhesive layer include anhydride modified polyolefin, ethylene propylene diene rubber, SIS, SBR,
The combination of one or more of SBS, SEBS, EVA and TPU particle；
Preferably, the hot melt adhesive layer with a thickness of 2-18 μm, preferably 3-12 μm, more preferably 3.5-5 μm.
7. composite plastic film according to claim 1, it is characterised in that: two sides of the intermediate plastic layer carry out bottom
Painting or sided corona treatment；
Preferably, the intermediate plastic layer with a thickness of 10-120 μm, preferably 20-80 μm, more preferably 25-60 μm.
8. composite plastic film according to claim 1, it is characterised in that: the raw material of the intermediate adhesive layer is polyester adhesive
Glutinous agent, adhesive for polyurethane or polyolefin adhesive；Preferably adhesive for polyurethane or polyolefin adhesive；More preferably polyene
Hydrocarbon adhesive；
Preferably, the intermediate adhesive layer with a thickness of 1-10 μm, preferably 2-5 μm, more preferably 2.5-3.5 μm；
Preferably, the gluing solid content of the raw material adhesive of the intermediate adhesive layer is 5%-25%；Preferably 8%-18%,
More preferably 10%-16%.
9. composite plastic film according to claim 1, it is characterised in that: the appearance of the outer layer plastic layer of the composite plastic film
Face is further coated with smooth oxidant layer, and the raw material slipping agent of the smooth oxidant layer includes erucyl amide, oleamide, long chain fatty acids
The combination of one or more of ester, ethylene bis stearamide, compound silicone oil, single silicone oil.
10. the described in any item composite plastic films of claim 1-9 as the lithium that electrolyte or electrolyte are solid-state or liquid from
The application of the housing material of sub- battery；
When for liquid, electrolyte is water base-inorganic salt system or without lithium hexafluoro phosphate system.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN111761913A (en) * | 2020-06-30 | 2020-10-13 | 常州斯威克光伏新材料有限公司 | Preparation method of colored aluminum-plastic composite film |
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