CN107739583A - Li-ion cell protection film and preparation method thereof - Google Patents
Li-ion cell protection film and preparation method thereof Download PDFInfo
- Publication number
- CN107739583A CN107739583A CN201710978366.XA CN201710978366A CN107739583A CN 107739583 A CN107739583 A CN 107739583A CN 201710978366 A CN201710978366 A CN 201710978366A CN 107739583 A CN107739583 A CN 107739583A
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- China
- Prior art keywords
- ion cell
- protection film
- cell protection
- isocyanates
- acrylic
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Classifications
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- 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
- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
- C09J133/04—Homopolymers or copolymers of esters
Abstract
The invention discloses a kind of li-ion cell protection film and preparation method thereof, the li-ion cell protection film includes PET basement membranes, acrylic layer, PET mould release membrances from the bottom to top, and the acrylic layer includes the following component calculated by mass percentage：Acrylic acid adhesive 64%~75%；Isocyanates 0.1%~1%；Nano environmental protection Halogen mill base 0.1%~1%；Solvent 24%~35%；The acrylic acid adhesive is the two-component solvent-type acrylic ester pressure-sensitive SAA2450 of the fertile production of Xi'an space flight three, and the isocyanates is the isocyanates 3100 of Bayer Bitterfeld GmbH production.Diaphragm and aluminum plastic film stickiness prepared by the present invention is good; after being bonded with aluminum plastic film after high temperature high pressure process peel off without cull, it is unshadowed, do not pollute printing coding; peeling force growth rate can be maintained within 200% after HTHP, and protection membrane structure is simpler, and cost is cheap.
Description
Technical field
The present invention relates to li-ion cell protection Material Field, in particular it relates to a kind of li-ion cell protection film and its system
Preparation Method.
Background technology
To solve the energy and environmental problem of getting worse, energy-saving and emission-reduction are increasingly paid attention to by whole world various countries, right
In the problem of environmental pollution caused by automobile, solution best at present is exactly to greatly develop new-energy automobile, especially electric
Electrical automobile.Thus, a critical component as new-energy automobile, lithium battery group are just wide with the popularization of new-energy automobile
General application, its power supply performance, stability and security are one of the further development and marketing that determine new-energy automobile
Key factor.During the processing procedure of lithium battery, finish after battery core, it is necessary to use aluminum plastic film to do outsourcing material, and finish outer
The easily peelable special protection film of a suitable aluminum plastic film fitting and protection is just needed during processing procedure after bag, in plastotype and chemical conversion
HTHP (85 DEG C, 100kg) during protect aluminum plastic film not scratched and protected coding not to be contaminated, while in process
It is unshadowed without cull when completion is torn off.Patent 103333628 discloses a kind of poly-lithium battery privacy protection film, the guarantor
Cuticula includes polyacrylic adhesive layer and basic unit, however, the diaphragm component species is more, including two class adhesives, two
Class curing agent, component allocation process is increasingly complex, and is difficult to bear lithium battery plastotype and the high temperature and high pressure environment of chemical conversion, is avoided that
The intrinsic peeling force of acrylic compounds adhesive layer increases the problem of too fast.
The content of the invention
Based on this, the defects of the invention reside in prior art is overcome, there is provided a kind of li-ion cell protection film, the diaphragm with
Aluminum plastic film stickiness is good, after being bonded with aluminum plastic film after high temperature high pressure process peel off without cull, it is unshadowed, do not pollute printing spray
Code, moreover it is possible to avoid the intrinsic peeling force of acrylic compounds adhesive layer from increasing the problem of too fast, peeling force growth rate can be in high temperature height
Maintained after pressure within 200%, easy sticker is easily torn, and protects membrane structure simpler, prepares simplicity, cost is cheap.
Another object of the present invention is to provide the preparation method of the li-ion cell protection film, the preparation method is simply easy
OK.
Its technical scheme is as follows：
A kind of li-ion cell protection film, from the bottom to top including PET basement membranes, acrylic layer, PET mould release membrances, the acrylic layer
Including the component calculated by mass percentage as follows：
Acrylic acid adhesive 64%~75%；
Isocyanates 0.1%~1%；
Nano environmental protection Halogen mill base 0.1%~1%；
Solvent 24%~35%；
The acrylic acid adhesive is the two-component solvent-type acrylic ester pressure-sensitive of the fertile production of Xi'an space flight three
SAA2450, the isocyanates are the isocyanates 3100 of Bayer Bitterfeld GmbH production.
Matched for the aluminum plastic film with low-surface-energy, the acrylic layer in li-ion cell protection film should accomplish in process
Easily peelable, not cull, unshadowed, while meet to match with the stickiness of aluminum plastic film again.The present invention is suitable by selecting
Adhesive contains multiple hydroxyls so that peeled off after subsequent high temperature high pressure so that aluminum plastic film preferably allows glue-line to moisten in adhesive
Power will not increase excessive, be easy to peel off, and after peeling off without cull, shadow phenomena such as；By screen isocyanates species and
NCO- content, further increase the performance of diaphragm.The present invention is by selecting suitable acrylic acid adhesive, isocyanic acid
Ester, nano environmental protection Halogen mill base etc., and its composition and ratio is adjusted, prepare the diaphragm suitable for lithium battery, the protection
Film be bonded with aluminum plastic film after after high temperature high pressure process peel off without cull, it is unshadowed, do not pollute printing coding, peeling force growth rate
It can be maintained after HTHP within 200%.
In one of the embodiments, the acrylic layer includes the following component calculated by mass percentage：
Acrylic acid adhesive 66%~72%；
Isocyanates 0.4%~0.6%；
Nano environmental protection Halogen mill base 0.4%~0.6%；
Solvent 26%~32%.
In one of the embodiments, the nano environmental protection Halogen mill base includes the ethereal blue mill base of the prosperous production in Shenzhen
82310。
In one of the embodiments, the solvent is ethyl acetate and/or toluene.
In one of the embodiments, the acrylic layer thickness is 8~10 μm.Preferentially, the acrylic layer thickness
For 10 μm.
In one of the embodiments, the release film thickness is 40~60 μm.Preferentially, the release film thickness is 50
μm。
In one of the embodiments, the PET basement membrane thicknesses are 40~60 μm.Preferentially, the PET basement membrane thicknesses are
50μm。
The preparation method of the li-ion cell protection film, comprises the following steps：
S1, acrylic acid adhesive, isocyanates, nano environmental protection Halogen mill base, solvent be well mixed, obtain acrylic layer
Formula；
S2, acrylic layer formula is coated on the PET basement membrane corona surfaces that corona value is 38 dynes/more than cm；
S3, by precision coating machine oven for drying, with PET mould release membrances it is compound after, be wound into big parent roll.
In one of the embodiments, the preparation method of the li-ion cell protection film also includes step：S4, according to client will
Ask cut or cross cutting processing, be finally made diaphragm finished product.
The beneficial effects of the present invention are：The present invention is by selecting suitable acrylic acid adhesive, isocyanates, nano-rings
Halogen mill base etc. is protected, and adjusts its composition and ratio, has prepared the diaphragm suitable for lithium battery, the diaphragm and aluminum plastic film
After fitting after high temperature high pressure process peel off without cull, it is unshadowed, do not pollute printing coding, peeling force growth rate can be in high temperature height
Maintained after pressure within 200%；The method that the present invention prepares the li-ion cell protection film is simple and easy, and cost is cheap.
Embodiment
For the objects, technical solutions and advantages of the present invention are more clearly understood, below in conjunction with embodiment, to this
Invention is described in further detail.It should be appreciated that embodiment described herein is only explaining this hair
It is bright, do not limit protection scope of the present invention.
Brief description of the drawings
Fig. 1 is the li-ion cell protection membrane structure schematic diagram of embodiment 1.
Embodiment 1
As shown in figure 1, a kind of li-ion cell protection film, from the bottom to top including PET basement membranes, acrylic layer, PET mould release membrances, institute
The specific component for stating acrylic layer is as follows：
Acrylic acid adhesive (Xi'an space flight two-component solvent-type acrylic ester pressure-sensitive SAA2450) 70%；
Isocyanates (Bayer Bitterfeld GmbH isocyanates 3100) 0.56%；
Nano environmental protection Halogen mill base (Shenzhen prosperity 82310) 0.42%；
Solvent (toluene) 29.02%.
The li-ion cell protection film is prepared as follows：
S1, solvent, acrylic acid adhesive, nano environmental protection Halogen mill base, isocyanates be added sequentially in container fully
It is uniformly mixed, to acrylic layer formula；
S2, acrylic layer formula is coated on to the PET basement membranes electricity that corona value is 38 dynes/cm in accurate comma coating machine
On dizzy face, the thickness of the acrylic layer is 10 μm, and the thickness of the PET basement membranes is 50 μm；
S3, drying, with thickness be 50 μm PET mould release membrances it is compound after, be wound into big parent roll.
Embodiment 2
A kind of li-ion cell protection film, from the bottom to top including PET basement membranes, acrylic layer, PET mould release membrances, the acrylic layer
Specific component it is as follows：
Acrylic acid adhesive (Xi'an space flight two-component solvent-type acrylic ester pressure-sensitive SAA2450) 72%；
Isocyanates (Bayer Bitterfeld GmbH isocyanates 3100) 0.6%；
Nano environmental protection Halogen mill base (Shenzhen prosperity 82310) 0.4%；
Solvent (toluene) 27%.
The li-ion cell protection membrane preparation method is same as Example 1.
Embodiment 3
A kind of li-ion cell protection film, from the bottom to top including PET basement membranes, acrylic layer, PET mould release membrances, the acrylic layer
Specific component it is as follows：
Acrylic acid adhesive (Xi'an space flight two-component solvent-type acrylic ester pressure-sensitive SAA2450) 66%；
Isocyanates (Bayer Bitterfeld GmbH isocyanates 3100) 0.4%；
Nano environmental protection Halogen mill base (Shenzhen prosperity 82310) 0.6%；
Solvent (toluene) 33%.
The li-ion cell protection membrane preparation method is same as Example 1.
Embodiment 4
A kind of li-ion cell protection film, from the bottom to top including PET basement membranes, acrylic layer, PET mould release membrances, the acrylic layer
Specific component it is as follows：
Acrylic acid adhesive (Xi'an space flight two-component solvent-type acrylic ester pressure-sensitive SAA2450) 75%；
Isocyanates (Bayer Bitterfeld GmbH isocyanates 3100) 0.58%；
Nano environmental protection Halogen mill base (Shenzhen prosperity 82310) 0.42%；
Solvent (toluene) 24%.
The li-ion cell protection membrane preparation method is same as Example 1.
Embodiment 5
A kind of li-ion cell protection film, from the bottom to top including PET basement membranes, acrylic layer, PET mould release membrances, the acrylic layer
Specific component it is as follows：
Acrylic acid adhesive (Xi'an space flight two-component solvent-type acrylic ester pressure-sensitive SAA2450) 64%；
Isocyanates (Bayer Bitterfeld GmbH isocyanates 3100) 0.4%；
Nano environmental protection Halogen mill base (Shenzhen prosperity 82310) 0.6%；
Solvent (toluene) 35%.
The li-ion cell protection membrane preparation method is substantially the same manner as Example 1, and difference is, the PET basement membranes corona surface
Corona value be 45 dynes/cm.
Comparative example 1
A kind of li-ion cell protection film, its structure, composition, preparation method are substantially the same manner as Example 1, and difference is, this is right
The isocyanates that ratio 1 uses is the diisocyanate-sac21 of the fertile production of Xi'an space flight three.
Comparative example 2
A kind of li-ion cell protection film, its structure, composition, preparation method are substantially the same manner as Example 1, and difference is, this is right
The acrylic acid adhesive that ratio 2 uses is the two-component acrylicester adhesive 3412 of the production of Fanyu profit hundred million, and isocyanates is kind
Diisocyanate-the 3c38 of the production of Yu profit hundred million.
Comparative example 3
A kind of li-ion cell protection film, its structure, composition, preparation method are substantially the same manner as Example 1, and difference is, this is right
The two-component acrylicester adhesive 7712 that the acrylic acid adhesive that ratio 3 uses produces for Changxing chemical industry, isocyanates
For the diisocyanate EC-92 of Changxing chemical industry production.
Performance test is carried out to the li-ion cell protection film prepared by embodiment 1-5 and comparative example 1-3, technical indicator is shown in Table 1.
Test result is shown in Table 2, table 3.
Table 1
Table 2
Table 3
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope that this specification is recorded all is considered to be.
Embodiment described above only expresses the several embodiments of the present invention, and its description is more specific and detailed, but simultaneously
Can not therefore it be construed as limiting the scope of the patent.It should be pointed out that come for one of ordinary skill in the art
Say, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention
Scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (9)
1. a kind of li-ion cell protection film, it is characterised in that described from the bottom to top including PET basement membranes, acrylic layer, PET mould release membrances
Acrylic layer includes the following component calculated by mass percentage：
Acrylic acid adhesive 64%~75%；
Isocyanates 0.1%~1%；
Nano environmental protection Halogen mill base 0.1%~1%；
Solvent 24%~35%；
The acrylic acid adhesive is that the two-component solvent-type acrylic ester pressure-sensitive SAA2450 produced, institute are irrigated in Xi'an space flight three
State the isocyanates 3100 that isocyanates is Bayer Bitterfeld GmbH production.
2. li-ion cell protection film according to claim 1, it is characterised in that the acrylic layer includes pressing quality percentage as follows
Than the component of calculating：
Acrylic acid adhesive 66%~72%；
Isocyanates 0.4%~0.6%；
Nano environmental protection Halogen mill base 0.4%~0.6%；
Solvent 26%~32%.
3. li-ion cell protection film according to claim 1, it is characterised in that the nano environmental protection Halogen mill base is that Shenzhen is prosperous
The ethereal blue mill base 82310 of production.
4. li-ion cell protection film according to claim 1, it is characterised in that the solvent ethyl acetate and/or toluene.
5. li-ion cell protection film according to claim 1, it is characterised in that the acrylic layer thickness is 8~10 μm.
6. li-ion cell protection film according to claim 1, it is characterised in that the release film thickness is 40~60 μm.
7. li-ion cell protection film according to claim 1, it is characterised in that the PET basement membrane thicknesses are 40~60 μm.
8. the preparation method of li-ion cell protection film described in claim 1-7 any claims, it is characterised in that including following step
Suddenly：
S1, acrylic acid adhesive, isocyanates, nano environmental protection Halogen mill base, solvent be well mixed, obtain acrylic layer and match somebody with somebody
Side；
S2, acrylic layer formula is coated on the PET basement membrane corona surfaces that corona value is 38 dynes/more than cm；
S3, drying, with PET mould release membrances it is compound after, be wound into big parent roll.
9. the preparation method of li-ion cell protection film according to claim 8, it is characterised in that also including step：S4, according to visitor
Family requires to be cut or cross cutting processing, is finally made diaphragm finished product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710978366.XA CN107739583B (en) | 2017-10-18 | 2017-10-18 | Lithium battery protective film and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710978366.XA CN107739583B (en) | 2017-10-18 | 2017-10-18 | Lithium battery protective film and preparation method thereof |
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| CN107739583A true CN107739583A (en) | 2018-02-27 |
| CN107739583B CN107739583B (en) | 2021-04-02 |
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|---|---|---|---|
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108659728A (en) * | 2018-05-21 | 2018-10-16 | 佛山市顺德区永创翔亿电子材料有限公司 | Dumb light coating aluminum plastic film poly-lithium battery protective film and preparation method thereof |
| CN112140657A (en) * | 2020-10-02 | 2020-12-29 | 高冠胶粘制品(昆山)有限公司 | Black protective film applied to fixing flexible flat cable and manufacturing method thereof |
| CN112525464A (en) * | 2020-11-20 | 2021-03-19 | 汕尾天贸新能源科技有限公司 | Test method for maintaining constant dyne value of surface of aluminum plastic film after battery processing |
| CN112574683A (en) * | 2020-11-25 | 2021-03-30 | 苏州赛伍应用技术股份有限公司 | Acrylic protective film for aluminum plastic film manufacturing process and preparation method thereof |
| CN112852323A (en) * | 2019-11-28 | 2021-05-28 | 湖南尚鑫新材料科技有限公司 | PET (polyethylene terephthalate) anti-static acrylic protective film and preparation method thereof |
| CN112980342A (en) * | 2019-12-14 | 2021-06-18 | 中国科学院大连化学物理研究所 | Protective back membrane for proton exchange membrane and preparation method thereof |
| CN113968058A (en) * | 2021-10-30 | 2022-01-25 | 芜湖徽氏新材料科技有限公司 | Protective film for lithium ion battery |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108659728A (en) * | 2018-05-21 | 2018-10-16 | 佛山市顺德区永创翔亿电子材料有限公司 | Dumb light coating aluminum plastic film poly-lithium battery protective film and preparation method thereof |
| CN112852323A (en) * | 2019-11-28 | 2021-05-28 | 湖南尚鑫新材料科技有限公司 | PET (polyethylene terephthalate) anti-static acrylic protective film and preparation method thereof |
| CN112980342A (en) * | 2019-12-14 | 2021-06-18 | 中国科学院大连化学物理研究所 | Protective back membrane for proton exchange membrane and preparation method thereof |
| CN112140657A (en) * | 2020-10-02 | 2020-12-29 | 高冠胶粘制品(昆山)有限公司 | Black protective film applied to fixing flexible flat cable and manufacturing method thereof |
| CN112525464A (en) * | 2020-11-20 | 2021-03-19 | 汕尾天贸新能源科技有限公司 | Test method for maintaining constant dyne value of surface of aluminum plastic film after battery processing |
| CN112525464B (en) * | 2020-11-20 | 2024-02-20 | 汕尾天贸新能源科技有限公司 | Test method for maintaining unchanged surface dyne value of aluminum-plastic film after battery processing |
| CN112574683A (en) * | 2020-11-25 | 2021-03-30 | 苏州赛伍应用技术股份有限公司 | Acrylic protective film for aluminum plastic film manufacturing process and preparation method thereof |
| CN113968058A (en) * | 2021-10-30 | 2022-01-25 | 芜湖徽氏新材料科技有限公司 | Protective film for lithium ion battery |
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