CN107611199B - A kind of overlay film type solar cell backboard - Google Patents
A kind of overlay film type solar cell backboard Download PDFInfo
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- CN107611199B CN107611199B CN201710655893.7A CN201710655893A CN107611199B CN 107611199 B CN107611199 B CN 107611199B CN 201710655893 A CN201710655893 A CN 201710655893A CN 107611199 B CN107611199 B CN 107611199B
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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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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Abstract
The invention discloses a kind of overlay film type solar cell backboards, it is successively made of from bottom to top fluorine film layer, glue layer, PET base membrane layer, coat, the glue of glue layer is mixed by modified host crystal D and glue curing agent 10~25:1 in mass ratio, modified host crystal D's the preparation method comprises the following steps: methyl iso-butyl ketone (MIBK), propylene glycol methyl ether acetate, butyl acetate, in mass ratio 3~4:0.5~1.5:1 ratio are mixed and made into mixed solution A；Polyvinylidene fluoride resin powder and mixed solution A are mixed in the ratio of solid content 35~50%, and heating stirring mixes, and emulsion B is made；Emulsion B is added in the original host agent C of glue, is mixed by weight 1:4~6, is stirred evenly, modified host crystal D is made.The present invention by glue layer carry out PVDF it is micronization modified, improve the cohesive force of glue.Especially after long-time aging, modified glue shows preferable ageing-resistant performance, keeps preferable bonding force, improves the ageing-resistant ability of backboard.
Description
Technical field
The present invention relates to a kind of overlay film type solar cell backboards.
Background technique
Solar energy backboard is a kind of functional material, for the encapsulation of photovoltaic module, plays the cell piece in protection component
Effect, be one of the critical material in component.Its one side is air surface, is directly exposed in air, it is desirable that the face has excellent
Different weather-resistant performance；Another side is that battery is unilateral, becomes component by EVA adhesive film and cell piece lamination, encapsulation,
The face is asked to have good and EVA bond properties.Overlay film type solar energy backboard refers to that the single or double setting of backboard is fluorine-containing thin
Film, fluorine-contained film and PET become whole composite membrane after being bonded with glue, and the stability of fluorine-contained film can protect the property of PET
Can, the stability of backboard in turn ensures performance of the solar components after use in 25 years, so fluorine-contained film and PET
Bond properties is the key performance of backboard, and the adhesiveness of backboard interlayer is mainly to be determined by the performance of glue.Make for a long time
With in the process, due to glue layer hydrolysis, aging, it may cause fluorine film and PET basement membrane removed, back board structure is destroyed.
Summary of the invention
The application technical problems to be solved are, in the backboard of the prior art, the bonding force of fluorine-contained film and PET are low, lead
The problem for causing backboard entirety weatherability bad.
The technical solution adopted by the present invention is that:
A kind of overlay film type solar cell backboard, the overlay film type solar cell backboard is from bottom to top successively by fluorine film
Layer, glue layer, PET base membrane layer, coat composition, it is characterised in that the glue of the glue layer is consolidated by modified host crystal D and glue
Agent 10~25:1 in mass ratio is mixed (preferably 18~22:1), and the modified host crystal D is made by the following method:
(a) methyl iso-butyl ketone (MIBK) (MIBK), propylene glycol methyl ether acetate (PMA), butyl acetate, in mass ratio 3~4:0.5
~1.5:1 (preferred mass ratio 3:1:1) ratio is mixed and made into mixed solution A；
(b) Kynoar (PVDF) toner and mixed solution A, by 35~50% (preferably solid content of solid content
40%) ratio mixing, heating stirring mix, and emulsion B is made；
(c) emulsion B is added in the original host agent C of glue, emulsion B and original host agent C by weight 1:4~6 (preferably
It 1:5) mixes, stirs evenly, modified host crystal D is made；The master that two-component polyurethane adhesive sticks agent can be used in the original host agent of glue
Agent, ingredient are general are as follows: polyester polyol 40~50%；Polyether polyol 10~20%；Stabilizer 0.5~5%；Ethyl acetate
(as solvent) 30~40%.
The glue curing agent is preferably polyisocyanate curing agent.
In the step (b), preferably 0.5~20 micron of the partial size of Kynoar (PVDF) toner.
In the step (b), heating temperature is generally 55~65 DEG C, preferably 60 DEG C, and the high-speed stirred time is 10~20 points
Clock.
Further, the fluorine film layer is the air surface weathering layer of backboard, using coating technique, by fluorine film by glue layer with
PET base membrane layer combines；The coat is that the battery of backboard is unilateral, is incorporated into PET base by coating processes with fluorine-containing slurry
Film layer, heating, drying film-forming；
Further, the fluorine film layer with a thickness of 15~40 μm.Commercially available PVDF thin film can be used in fluorine film layer,
5~15 μm of the thickness of the glue layer.
The thickness of PET base membrane layer is generally 100~350 μm.
Heating, drying film-forming is made after the coat is coated by fluorine-containing slurry, described to contain with a thickness of 15~30 μm
The common fluorine-containing coat raw material in market can be used in fluorine slurry, prepares see also Chinese patent CN201310229302.1, formula
Are as follows: polyester PET powder 6~10%；Fluorine resin 30~55%；Solvent 10~20%；Crosslinking agent 2~6%；Filler 10~
30%；Ethylene glycol 5~8%.
Overlay film type solar cell backboard provided by the invention can be made by with laxative remedy technique:
(1) PET film matrix is pre-processed；
(2) sanded treatment is carried out after being uniformly mixed according to a ratio each raw material component of the fluorine-containing slurry, forms levelability
Good, fineness is applied directly to less than 25 microns, the mixed emulsion of modest viscosity by heating on pretreated PET film matrix
It is toasted to 80~200 DEG C, 15~30 μm of coat is obtained after being heating and curing, the backboard semi-finished product for having been coated with single side are made
A；
(3) ratio of glue modified host crystal D and glue curing agent 10~25:1 in mass ratio (preferably 18~22:1) is mixed
Glue is synthesized, coating process is then used, glue-coating is not coated with clad can in backboard semi-finished product A, passes through heating, drying, system
It obtains with a thickness of 5~15 μm of glue layers；
(4) fluorine film and the glue face pressure of backboard semi-finished product A is laminating, platen pressure is 40~60N, and laminating temperature is 85
~90 DEG C, backboard semi-finished product B is made；
(5) it cures:
Backboard semi-finished product B is placed 48 hours under 40 DEG C of environment, so that glue layer sufficiently cures, the overlay film type sun is made
It can battery back-sheet finished product.
In the step (1), before preparing backboard, first PET film matrix is pre-processed, pretreatment may include
It deoils and destatics processing: surface degreasing processing being carried out to PET film matrix with surfactant first, then uses deionized water
The activating agent of matrix surface is cleaned up.Matrix after oil removal treatment is carried out to destatic processing.Destaticing can adopt
With the method for static bruss.In general, those skilled in the art can be according to the surface appearance and actual process needs of matrix, certainly
Row selection pretreatment mode and step, or pre-treatment step is simplified or omitted.
In the step (2), coating method has silk-screen printing, spraying, roller coating, blade coating, showering etc..
The present invention also provides a kind of glue for overlay film type solar cell backboard, the glue by modified host crystal D and
Glue curing agent 10~25:1 in mass ratio is mixed, and the modified host crystal D is made by the following method:
(a) methyl iso-butyl ketone (MIBK), propylene glycol methyl ether acetate, butyl acetate, in mass ratio 3~4:0.5~1.5:1 are (excellent
Select mass ratio 3:1:1) ratio is mixed and made into mixed solution A；
(b) polyvinylidene fluoride resin powder and mixed solution A, by the ratio of solid content 35~50% (preferably solid content 40%)
Example mixing, heating stirring mix, and emulsion B is made；
(c) emulsion B is added in the original host agent C of glue, emulsion B and original host agent C by weight 1:4~6 (preferably
It 1:5) mixes, stirs evenly, modified host crystal D is made；The original host agent C of glue is the host agent that two-component polyurethane adhesive sticks agent；
The glue curing agent is polyisocyanate curing agent.
The present invention by glue layer carry out PVDF it is micronization modified, the cohesive force of glue is improved, to improve backboard
Whole weatherability.Especially after long-time aging, modified glue shows preferable ageing-resistant performance, keeps preferable
Bonding force improves the ageing-resistant ability of backboard.
Specific embodiment
With specific embodiment, technical scheme is described further below, but protection scope of the present invention is not
It is limited to this.
Embodiment 1
The weather-proof layer material of air surface: PVDF thin film, commercially available, manufacturer: Foshan FSPG Hi-Tech. Shares Co., Ltd.,
Model: JFS, thickness: 20 μm.
It is handled with surfactant with a thickness of 150 μm of PET film surface, is then cleaned with deionized water, with
The greasy dirt of film surface is removed, it is spare after drying.
PET slice is precipitated after phenol-carbon tetrachloride dissolution, it is micro- less than 25 that sediment is crushed to partial size in pulverizer
The powdered PET of rice.
The formula of fluorine-containing slurry are as follows: fluorine resin uses polyvinyl fluoride；Solvent is propylene glycol monomethyl ether；Crosslinking agent is γ-fourth
Lactone.
By fluorine resin, PET powder, solvent, crosslinking agent, titanium dioxide (TiO2) and ethylene glycol press 49: 10: 10: 6: 20: 5
Weight ratio cooperation, uniformly mix, be sanded 0.5 hour in bead sand mill, it is micro- less than 25 to form good leveling property, fineness
The mixed solution of rice, modest viscosity, is then heated to 180 degrees Celsius, is contained for one layer of coating in PET film using the method for roller coating
Fluoropolymer coating.180 degrees Celsius at a temperature of by 10 minutes baking be swollen, the thickness of the film is about 20 μm, system
The backboard semi-finished product A of single side must be had been coated with.
Two-component glue (manufacturer: favour Science and Technology Ltd., Wuhan Dell, model D5908A) is bought in market, and host agent is
D5908A, curing agent are the curing agent of D5908A.
It takes 300g methyl iso-butyl ketone (MIBK) (MIBK), 100g propylene glycol methyl ether acetate (PMA), 100g butyl acetate mixing system
At mixed solution A；Kynoar (PVDF) toner is added in 500g mixed solution A, and (0.5~20 micron of partial size, produce
Producer: Solvay SA, Belgium (Belgian Suo Weier limited liability company), model: Solef 1015), it is made into solid content
40% mixed liquor is heated to 60 DEG C, high-speed stirred 20 minutes, emulsion B is made, the original host agent C of glue is added in emulsion B
(D5908A) in, ratio by mass ratio 1:5, mixing stirs evenly, modified host crystal D is made.
Modified additive D and curing agent are mixed into glue according to mass ratio 18:1, then use coating process, glue is applied
Be distributed in backboard semi-finished product A is not coated with clad can, by heating, drying, is made with a thickness of 10 μm of glue layers；
By the glue face of PVDF thin film and backboard semi-finished product A laminating, the platen pressure 50N of pressure, laminating temperature is 85 DEG C,
Backboard semi-finished product B is made；
Backboard semi-finished product B is placed 48 hours under 40 DEG C of environment, so that glue layer sufficiently cures, the overlay film type sun is made
It can battery back-sheet finished product.
Comparative example 1
The step of with embodiment 1, is identical, is not both, the two-component glue (factory that glue uses embodiment 1 to buy
Family: favour Science and Technology Ltd., Wuhan Dell, model D5908A), host agent D5908A, without it is modified directly and curing agent according to
Mass ratio 18:1 is used in mixed way, and according to the same step bonding fluorine film of embodiment 1 and PET basement membrane, overlay film type solar-electricity is made
Pond backboard finished product.
Test: the initial bonding strength of the composite back plate of detection embodiment 1 and comparative example 1, and in 85% humidity, 85 degree
Peel strength after being placed 1000 hours under temperature environment.The examination criteria of peel strength is GB/T2790-1995.Acquired results
It is as shown in table 1:
Table 1
After the application increases a certain amount of PVDF in glue, the entirety that the stability of PVDF improves host agent is ageing-resistant
Performance, so cohesive force decline is relatively slow after aging 1000 hours, in addition, because there is the presence of PVDF in glue, multiple
During conjunction, there is the substance of same structure to have better combination under certain condition by PVDF and PVDF thin film in glue
Power, so initial adhesive force increases.
Embodiment 2
The step of with embodiment 1, is identical, is not both, and glue uses the two-component glue (manufacturer: moral of market purchase
State's Henkel (Henkel AG&Co.KGaA), model: LOCTITE LIOFOL, host agent are LIOFOL LA 2525, and curing agent is
LIOFOL LA 7396。
The modification procedure of glue is mixed into glue according to mass ratio 22:1 and makes with embodiment 1, modified additive D and curing agent
With then according to the same step bonding fluorine film of embodiment 1 and PET basement membrane, obtained overlay film type solar cell backboard finished product.
Comparative example 2
The step of with embodiment 2, is identical, the difference is that the two-component glue that glue uses embodiment 2 to buy, without
Modification is directly used in mixed way with curing agent according to mass ratio 22:1, according to the same step bonding fluorine film of embodiment 2 and PET base
Overlay film type solar cell backboard finished product is made in film.
Test: the initial bonding strength of the composite back plate of detection embodiment 2 and comparative example 2, and in 85% humidity, 85 degree
Peel strength after being placed 1000 hours under temperature environment.The examination criteria of peel strength is GB/T2790-1995.Acquired results
It is as shown in table 2:
Table 2
Claims (10)
1. a kind of overlay film type solar cell backboard, the overlay film type solar cell backboard from bottom to top successively by fluorine film layer,
Glue layer, PET base membrane layer, coat composition, it is characterised in that the glue of the glue layer is by modified host crystal D and glue curing agent
10~25:1 is mixed in mass ratio, and the modified host crystal D is made by the following method:
(a) methyl iso-butyl ketone (MIBK), propylene glycol methyl ether acetate, butyl acetate, in mass ratio 3~4:0.5~1.5:1 ratio mixing
Mixed solution A is made；
(b) polyvinylidene fluoride resin powder and mixed solution A are mixed in the ratio of solid content 35~50%, and heating stirring mixes,
Emulsion B is made；
(c) emulsion B is added in the original host agent C of glue, emulsion B and original host agent C are mixed by weight 1:4~6, stirring
Uniformly, modified host crystal D is made；The original host agent C of glue is the host agent that two-component polyurethane adhesive sticks agent.
2. overlay film type solar cell backboard as described in claim 1, it is characterised in that the ingredient of the original host agent C of glue
Are as follows: polyester polyol 40~50%；Polyether polyol 10~20%；Stabilizer 0.5~5%；Ethyl acetate 30~40%.
3. overlay film type solar cell backboard as described in claim 1, it is characterised in that the glue curing agent is polyisocyanate cyanogen
Acid esters curing agent.
4. overlay film type solar cell backboard as described in claim 1, it is characterised in that in the step (b), polyvinylidene fluoride
The partial size of olefine resin powder is 0.5~20 micron.
5. overlay film type solar cell backboard as described in claim 1, it is characterised in that in the step (a), methyl tert-butyl
Base ketone, propylene glycol methyl ether acetate, butyl acetate mass ratio be 3:1:1.
6. overlay film type solar cell backboard as described in claim 1, it is characterised in that in the step (b), polyvinylidene fluoride
Olefine resin powder and mixed solution A are mixed in the ratio of solid content 40%.
7. overlay film type solar cell backboard as described in claim 1, it is characterised in that in the step (c), emulsion B and
Original host agent C is mixed by weight 1:5.
8. overlay film type solar cell backboard as described in claim 1, it is characterised in that the fluorine film layer is the air of backboard
Face weathering layer is combined fluorine film by glue layer using coating technique with PET base membrane layer；The coat is the electricity of backboard
Pond is unilateral, is incorporated into PET base membrane layer by coating processes with fluorine-containing slurry, heating, drying film-forming is made.
9. the preparation method of overlay film type solar cell backboard as described in claim 1, it is characterised in that the method are as follows:
(1) PET film matrix is pre-processed；
(2) sanded treatment is carried out after being uniformly mixed according to a ratio each raw material component of fluorine-containing slurry, and it is small to form good leveling property, fineness
In 25 microns, the mixed emulsion of modest viscosity, it is applied directly to by being heated to 80~200 on pretreated PET film matrix
DEG C baking, obtains 15~30 μm of coat, is made and has been coated with the backboard semi-finished product A of single side after being heating and curing；
(3) glue modified host crystal D and glue curing the agent ratio of 10~25:1 in mass ratio are mixed into glue, then used
Glue-coating is not coated with clad can in backboard semi-finished product A by coating process, by heating, drying, is made with a thickness of 5~15 μm of glue
Layer；
(4) fluorine film and the glue face pressure of backboard semi-finished product A is laminating, platen pressure is 40~60N, and laminating temperature is 85~90
DEG C, backboard semi-finished product B is made；
(5) it cures:
Backboard semi-finished product B is placed 48 hours under 40 DEG C of environment, so that glue layer sufficiently cures, overlay film type solar-electricity is made
Pond backboard finished product.
10. a kind of glue for overlay film type solar cell backboard, it is characterised in that the glue is by modified host crystal D and glue
Curing agent 10~25:1 in mass ratio is mixed, and the modified host crystal D is made by the following method:
(a) methyl iso-butyl ketone (MIBK), propylene glycol methyl ether acetate, butyl acetate, in mass ratio 3~4:0.5~1.5:1 ratio mixing
Mixed solution A is made；
(b) polyvinylidene fluoride resin powder and mixed solution A are mixed in the ratio of solid content 35~50%, and heating stirring mixes,
Emulsion B is made；
(c) emulsion B is added in the original host agent C of glue, emulsion B and original host agent C are mixed by weight 1:4~6, stirring
Uniformly, modified host crystal D is made；The original host agent C of glue is the host agent that two-component polyurethane adhesive sticks agent；
The glue curing agent is polyisocyanate curing agent.
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| CN108831940A (en) * | 2018-06-13 | 2018-11-16 | 晶科能源科技（海宁）有限公司 | Improve the photovoltaic module and preparation method thereof of Reflecting backboard |
| CN109550770A (en) * | 2018-11-23 | 2019-04-02 | 浙江晶科能源有限公司 | A kind of method and apparatus for scrapping photovoltaic back harmless treatment |
| CN109585588B (en) * | 2018-12-03 | 2021-02-26 | 江苏中宇光伏科技有限公司 | Solar cell back plate |
| CN109786506B (en) * | 2019-01-08 | 2020-12-08 | 苏州福斯特光伏材料有限公司 | Online treatment method for composite backboard production waste |
| CN110126408B (en) * | 2019-05-16 | 2022-03-08 | 苏州赛伍应用技术股份有限公司 | Hardening method of transparent back plate |
| CN115519867A (en) * | 2021-12-29 | 2022-12-27 | 嘉兴高正新材料科技股份有限公司 | Polytetrafluoroethylene film-coated plate and preparation method thereof |
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| CN103730527A (en) * | 2012-10-11 | 2014-04-16 | 江苏凯圣新材料科技有限公司 | Solar cell backboard with excellent weather-resistant performance and manufacturing method thereof |
| CN103224770B (en) * | 2013-03-27 | 2014-12-03 | 巨化集团技术中心 | Adhesive for solar cell backboard and preparation method thereof |
| CN104479619B (en) * | 2014-12-11 | 2017-07-14 | 乐凯胶片股份有限公司 | A kind of Adhesive composition and solar cell backboard |
| CN106010414A (en) * | 2016-06-30 | 2016-10-12 | 杭州福斯特光伏材料股份有限公司 | High-cohesiveness fluorocarbon coating and application |
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