CN107611199A - 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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- CN107611199A CN107611199A CN201710655893.7A CN201710655893A CN107611199A CN 107611199 A CN107611199 A CN 107611199A CN 201710655893 A CN201710655893 A CN 201710655893A CN 107611199 A CN107611199 A CN 107611199A
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- glue
- backboard
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- solar cell
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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 backboard, is made up of successively fluorine film layer, glue layer, PET base membrane layers, coat from bottom to top, and the glue of glue layer is by modified host crystal D and glue curing agent in mass ratio 10~25:1 is mixed, and modified host crystal D preparation method is：Methyl iso-butyl ketone (MIBK), propylene glycol methyl ether acetate, butyl acetate, in mass ratio 3~4:0.5~1.5：1 ratio is mixed and made into mixed solution A；Polyvinylidene fluoride resin powder and mixed solution A, mixed in the ratio of solid content 35~50%, heating stirring mixes, and emulsion B is made；Emulsion B is added in the original host C of glue, by weight 1：4~6 mixing, stir, modified host crystal D are made.The present invention is micronization modified by carrying out PVDF to glue layer, improves the cohesive force of glue.Particularly 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 backboard.
Background technology
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 critical material in component.Its one side is air surface, is directly exposed in air, it is desirable to which the face possesses excellent
Different weather-resistant performance；Another side is that battery is unilateral, is laminated, is encapsulated to turn into component by EVA adhesive film and cell piece,
The face is asked to possess good with EVA bond properties.It is fluorine-containing thin that overlay film type solar energy backboard refers to that the single or double of backboard is set
The composite membrane that film, fluorine-contained film and PET are integrally formed after being bonded with glue, the stability of fluorine-contained film can protect PET property
Can, the stability of backboard in turn ensure that 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 cohesive of backboard interlayer is mainly what is determined by the performance of glue.Make for a long time
During, due to glue layer hydrolysis, aging, fluorine film may be caused to be peeled off with PET basement membranes, back board structure is destroyed.
The content of the invention
The application technical problems to be solved are, in the backboard of prior art, fluorine-contained film and PET bonding force are low, lead
The problem of causing backboard entirety weatherability bad.
The technical solution adopted by the present invention is：
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 layers, coat composition, it is characterised in that the glue of the glue layer is consolidated by modified host crystal D and glue
Agent in mass ratio 10~25:1 is mixed and made into (preferably 18~22:1), 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 is than 3：1：1) ratio is mixed and made into mixed solution A；
(b) Kynoar (PVDF) toner and mixed solution A, by (the preferably solid content of solid content 35~50%
40%) ratio mixing, heating stirring mix, and emulsion B is made；
(c) emulsion B is added in the original host C of glue, emulsion B and original host C are by weight 1:4~6 (preferably
1：5) mix, stir, modified host crystal D is made；The original host of glue can use the master of the glutinous agent of two-component polyurethane adhesive
Agent, its composition are generally：PEPA 40~50%；PPG 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 particle diameter of Kynoar (PVDF) toner.
In the step (b), heating-up 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 layers are combined；The coat is unilateral for the battery of backboard, and PET bases are incorporated into by coating processes with fluorine-containing slurry
Film layer, heating, drying film-forming；
Further, the thickness of the fluorine film layer is 15~40 μm.Fluorine film layer can use commercially available PVDF thin film,
5~15 μm of the thickness of the glue layer.
The thickness of PET base membrane layers is generally 100~350 μm.
Heating, drying film-forming is made after the coat is coated by fluorine-containing slurry, and thickness is 15~30 μm, described to contain
Fluorine slurry can use the fluorine-containing coat raw material that market is commonly used, and also refer to Chinese patent CN201310229302.1 preparations, formula
For：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 each raw material components of the fluorine-containing slurry are uniformly mixed according to a ratio, forms levelability
Good, fineness is less than 25 microns, the mixed emulsion of modest viscosity, is applied directly on the PET film matrix by pretreatment, heats
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 one side are made
A；
(3) by glue modified host crystal D and glue curing agent in mass ratio 10~25:1 (preferably 18~22:1) ratio is mixed
Glue is synthesized, then using coating process, glue-coating is not coated with clad can in backboard semi-finished product A, passes through heating, drying, system
It is 5~15 μm of glue layers to obtain thickness；
(4) fluorine film and backboard semi-finished product A glue face pressure is laminating, platen pressure is 40~60N, and laminating temperature is 85
~90 DEG C, backboard semi-finished product B is made；
(5) cure：
Backboard semi-finished product B is placed 48 hours under 40 DEG C of environment so that glue layer fully cures, and the overlay film type sun is made
Can battery back-sheet finished product.
In the step (1), before backboard is prepared, first PET film matrix is pre-processed, pretreatment may include
Deoil and destatic processing：Surface degreasing processing is 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 to 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), painting 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 with
Glue curing agent in mass ratio 10~25:1 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 is (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 C of glue, emulsion B and original host C are by weight 1：4~6 (preferably
1：5) mix, stir, modified host crystal D is made；The original host C of glue is the host that two-component polyurethane adhesive sticks agent；
The glue curing agent is polyisocyanate curing agent.
The present invention is micronization modified by carrying out PVDF to glue layer, the cohesive force of glue is improved, so as to improve backboard
Overall weatherability.Particularly after long-time aging, modified glue shows preferable ageing-resistant performance, keeps preferable
Bonding force, improve the ageing-resistant ability of backboard.
Embodiment
Technical scheme is described further with specific embodiment 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：20μm.
The PET film surface that thickness is 150 μm is handled with surfactant, then cleaned with deionized water, with
The greasy dirt of film surface is removed, it is standby after drying.
PET sections are precipitated after phenol-carbon tetrachloride dissolving, it is micro- less than 25 that sediment is crushed to particle diameter in pulverizer
The powdered PET of rice.
The formula of fluorine-containing slurry is：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 than coordinating, uniformly mix, be sanded 0.5 hour in bead sand mill, form good leveling property, fineness be less than it is 25 micro-
Rice, the mixed solution of modest viscosity, are then heated to 180 degrees Celsius, one layer of application contains in PET film using the method for roller coating
Fluoropolymer coating.It is swelled at a temperature of 180 degrees Celsius by the baking of 10 minutes, the thickness of the film is about 20 μm, system
The backboard semi-finished product A of one side must be had been coated with.
Market purchase two-component glue (manufacturer：Favour Science and Technology Ltd. of Wuhan Dell, model D5908A), host is
D5908A, curing agent are D5908A curing agent.
Take 300g methyl iso-butyl ketone (MIBK)s (MIBK), 100g propylene glycol methyl ether acetates (PMA), 100g butyl acetates mixing system
Into mixed solution A；Kynoar (PVDF) toner (0.5~20 micron of particle diameter, production are added in 500g mixed solution As
Producer：Solvay SA, Belgium (Belgian Suo Weier limited companies), 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, and emulsion B is added the original host C of glue
(D5908A) in, ratio by mass is than 1：5, mixing, stir, modified host crystal D is made.
Modified additive D is with curing agent according to mass ratio 18:1 is mixed into glue, and then using coating process, glue is applied
Be distributed in backboard semi-finished product A is not coated with clad can, and by heating, drying, it is 10 μm of glue layers that thickness, which is made,；
By PVDF thin film and backboard semi-finished product A glue face 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 fully cures, and the overlay film type sun is made
Can battery back-sheet finished product.
Comparative example 1
The step of with embodiment 1, is identical, is not both, and glue uses the two-component glue (factory that embodiment 1 is bought
Family：Favour Science and Technology Ltd. of Wuhan Dell, model D5908A), host D5908A, without it is modified directly with curing agent according to
Mass ratio 18:1 is used in mixed way, and bonds fluorine film and PET basement membranes according to the same step of embodiment 1, overlay film type solar-electricity is made
Pond backboard finished product.
Test：Detect the initial bonding strength of the composite back plate of 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
As shown in table 1：
Table 1
After the application increases a certain amount of PVDF in glue, the entirety that PVDF stability improves host is ageing-resistant
Performance, so after aging 1000 hours, cohesive force decline is relatively slow, in addition, because there is PVDF presence in glue, multiple
During conjunction, the material of PVDF and PVDF thin film with same structure in glue combines with more preferable under certain condition
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 of market purchase：Moral
State's Henkel (Henkel AG＆Co.KGaA), model：LOCTITE LIOFOL, host are LIOFOL LA 2525, and curing agent is
LIOFOL LA 7396。
The modification procedure of glue is with embodiment 1, and modified additive D is with curing agent according to mass ratio 22:1, which is mixed into glue, makes
With then according to the same step bonding fluorine film of embodiment 1 and PET basement membranes, obtained overlay film type solar cell backboard finished product.
Comparative example 2
The step of with embodiment 2, is identical, except that, glue uses the two-component glue that embodiment 2 is bought, without
It is modified directly with curing agent according to mass ratio 22:1 is used in mixed way, and fluorine film and PET bases are bonded according to the same step of embodiment 2
Film, overlay film type solar cell backboard finished product is made.
Test：Detect the initial bonding strength of the composite back plate of 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
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 layers, coat composition, it is characterised in that the glue of the glue layer is by modified host crystal D and glue curing agent
In mass ratio 10~25:1 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 mixes
Mixed solution A is made；
(b) polyvinylidene fluoride resin powder and mixed solution A, being mixed in the ratio of solid content 35~50%, heating stirring mixes,
Emulsion B is made；
(c) emulsion B is added in the original host C of glue, emulsion B and original host C are by weight 1：4~6 mixing, stirring
Uniformly, modified host crystal D is made；The original host C of glue is the host that two-component polyurethane adhesive sticks agent.
2. overlay film type solar cell backboard as claimed in claim 1, it is characterised in that the composition of the original host C of glue
For：PEPA 40~50%；PPG 10~20%；Stabilizer 0.5~5%；Ethyl acetate 30~40%.
3. overlay film type solar cell backboard as claimed in claim 1, it is characterised in that the glue curing agent is more isocyanides
Acid esters curing agent.
4. overlay film type solar cell backboard as claimed in claim 1, it is characterised in that in the step (b), polyvinylidene fluoride
The particle diameter of olefine resin powder is 0.5~20 micron.
5. overlay film type solar cell backboard as claimed in claim 1, it is characterised in that in the step (a), methyl tert-butyl
Base ketone, propylene glycol methyl ether acetate, the mass ratio of butyl acetate are 3：1：1.
6. overlay film type solar cell backboard as claimed in claim 1, it is characterised in that in the step (b), polyvinylidene fluoride
Olefine resin powder and mixed solution A, mixed in the ratio of solid content 40%.
7. overlay film type solar cell backboard as claimed in claim 1, it is characterised in that in the step (c), emulsion B and
Original host C is by weight 1：5 mixing.
8. overlay film type solar cell backboard as claimed in claim 1, it is characterised in that the fluorine film layer is the air of backboard
Face weathering layer, using coating technique, fluorine film is combined by glue layer with PET base membrane layers；The coat is the electricity of backboard
Pond is unilateral, is incorporated into PET base membrane layers 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 claimed in claim 1, it is characterised in that methods described is：
(1) PET film matrix is pre-processed；
(2) sanded treatment is carried out after each raw material components of fluorine-containing slurry are uniformly mixed according to a ratio, it is small to form good leveling property, fineness
In 25 microns, the mixed emulsion of modest viscosity, it is applied directly on the PET film matrix by pretreatment, is heated to 80~200
DEG C baking, obtains 15~30 μm of coat, the backboard semi-finished product A for having been coated with one side is made after being heating and curing；
(3) by glue modified host crystal D and glue curing agent in mass ratio 10~25：1 ratio is mixed into glue, then uses
Coating process, glue-coating is not coated with clad can in backboard semi-finished product A, by heating, drying, it is 5~15 μm of glue that thickness, which is made,
Layer；
(4) fluorine film and backboard semi-finished product A glue face pressure is laminating, platen pressure is 40~60N, and laminating temperature is 85~90
DEG C, backboard semi-finished product B is made；
(5) cure：
Backboard semi-finished product B is placed 48 hours under 40 DEG C of environment so that glue layer fully cures, and 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 in mass ratio 10~25:1 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 mixes
Mixed solution A is made；
(b) polyvinylidene fluoride resin powder and mixed solution A, being mixed in the ratio of solid content 35~50%, heating stirring mixes,
Emulsion B is made；
(c) emulsion B is added in the original host C of glue, emulsion B and original host C are by weight 1：4~6 mixing, stirring
Uniformly, modified host crystal D is made；The original host C of glue is the host that two-component polyurethane adhesive sticks agent；
The glue curing agent is polyisocyanate curing agent.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN109585588A (en) * | 2018-12-03 | 2019-04-05 | 江苏中宇光伏科技有限公司 | A kind of solar cell back board production technology |
| CN109786506A (en) * | 2019-01-08 | 2019-05-21 | 苏州福斯特光伏材料有限公司 | A kind of on-line processing method of compound backboard production waste material |
| CN110126408A (en) * | 2019-05-16 | 2019-08-16 | 苏州赛伍应用技术股份有限公司 | A kind of method for curing of transparent back panel |
| 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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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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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 |
| CN109585588A (en) * | 2018-12-03 | 2019-04-05 | 江苏中宇光伏科技有限公司 | A kind of solar cell back board production technology |
| CN109786506A (en) * | 2019-01-08 | 2019-05-21 | 苏州福斯特光伏材料有限公司 | A kind of on-line processing method of compound backboard production waste material |
| CN110126408A (en) * | 2019-05-16 | 2019-08-16 | 苏州赛伍应用技术股份有限公司 | A kind of method for curing of transparent back panel |
| 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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