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Solar cell back panel

A technology for solar cells and back sheets, applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problems of performance degradation, easy hydrolysis, and increased weather resistance of polyester adhesive layers, and achieve difficult problems in improving production and processing performance. Excellent damp heat aging performance and excellent UV aging resistance

Active Publication Date: 2015-04-01
乐凯胶片股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, the cost of traditional composite materials is high, and the production process is complicated. On the other hand, adhesives are used to bond layers between layers, which is prone to delamination after aging; polyester bonding layer and insulation The PET layer has a good affinity, and the adhesion between the substrate and the substrate is relatively firm, but the polyester adhesive layer itself has a large UV and weather resistance yellowing, and is easily hydrolyzed, and its performance is seriously attenuated after aging.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Hydroxy Acrylic Resin Q 182 200g

[0036]HDI dimer N 100 23g

[0037] Butyl acetate 160g

[0038] Matting Powder HK 460 0.5g

[0039] Titanium dioxide 80g;

[0040] Add 200g of hydroxyacrylic resin Q182 manufactured by Mitsui Chemicals Co., Ltd., Tg=45°C, OH value 45mgKOH / g), 160g of butyl acetate solvent and 0.5g of n-propanol surface-modified HK460 matting powder (manufactured by Degussa, D=7μm), 80g of titanium dioxide, stirred for 20 minutes and filtered, then added 23g of isocyanate HDI dimer N100 (manufactured by Bayer Materialscience, Germany), continued to stir for 20 minutes, filtered, An adhesive layer coating liquid was obtained.

[0041] Apply the above-mentioned adhesive layer coating solution on one side of the cleaned and corona-treated substrate PET film by gravure coating method, and dry at 140°C for 3 minutes to obtain an 8 μm adhesive layer; then on the other side of the substrate The weather-resistant layer is formed by coating or compounding. ...

Embodiment 2

[0043] Hydroxy Acrylic Resin EPA 5860 200g

[0044] IPDI trimer Z 4470BA 22.4g

[0045] Ethyl acetate 160g

[0046] Matting Powder SY 622 6g

[0047] Titanium dioxide 100g;

[0048] Add 200g of hydroxyacrylic resin EPA5860 (manufactured by Daicel Co., Ltd., Japan, Tg=12°C, OH value 27mgKOH / g), 160g of ethyl acetate solvent and 6g of SY622 surface-modified by n-hexanol into a container equipped with a stirring device (manufactured by American Grace Company, D=17μm), 100g of titanium dioxide, stirred for 20 minutes and then filtered, then added 22.4g of IPDI trimer Z 4470BA (manufactured by Bayer Materialscience, Germany), continued to stir for 20 minutes, filtered to obtain a bond layer coating solution.

[0049] Apply the above-mentioned adhesive layer coating solution on one side of the cleaned and corona-treated substrate PET film by gravure coating method, and dry at 90°C for 4 minutes to obtain a 20 μm adhesive layer; then on the other side of the substrate The weathe...

Embodiment 3

[0051] Hydroxy Acrylic Resin AC-1164A 120g

[0052] IPDI trimer Z 4470BA 4g

[0053] Butanone 80g

[0054] Matting Powder ED 5 3g

[0055] Titanium dioxide 50g;

[0056] Add 120g of hydroxyacrylic resin AC-1164A (manufactured by Foshan Gaoming Tongde Chemical Co., Ltd., Tg=15°C, OH value 12mgKOH / g), 80g of methyl ethyl ketone solvent and 3g of n-hexanol surface modified into a container equipped with a stirring device. ED 5 (American Grace Company, D=9μm), 50g of titanium dioxide and 50g of titanium dioxide, stirred for 20 minutes and then filtered, then added 4g of isocyanate IPDI trimer Z 4470BA (manufactured by Bayer Materialscience), and continued to stir for 20 minutes , and filtered to obtain an adhesive layer coating liquid.

[0057] Apply the above-mentioned adhesive layer coating solution on one side of the cleaned and corona-treated substrate PET film by gravure coating method, and dry at 90°C for 3 minutes to obtain a 10 μm adhesive layer; then on the other side...

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Abstract

The invention provides a solar cell back panel with excellent weather resistance. The solar cell back panel comprises a weather resistant layer, an insulating layer and an adhesive layer, wherein the adhesive layer is a coating which is formed through curing of hydroxy acrylic resin and isocyanate and has high weather resistance; the glass-transition temperature of hydroxy acrylic resin is 12-45 DEG C; and the adhesive layer contains inorganic extinction powder subjected to surface treatment with an alcohol ester method. According to the solar cell back panel, the production and processing performance of the coating is improved, and the back panel has good weather resistance and EVA (ethylene vinyl acetate copolymer) adhesion and can effectively protect cell components in a solar cell module.

Description

technical field [0001] The invention relates to the technical field of solar battery backplanes, in particular to a solar battery backplane with excellent weather resistance. Background technique [0002] In recent years, as a representative of green energy, solar power generation has attracted more and more attention. At present, the application of solar energy is mainly to use solar power generation components to convert solar energy into electrical energy for utilization. Solar power generation components are mainly composed of front plates, packaging materials, crystalline silicon cells, and back plates. The solar backsheet is located on the back of the solar panel and protects and supports the solar cells. Therefore, it must have reliable electrical insulation, good mechanical properties, moisture barrier properties, and weather resistance. [0003] At present, the general-purpose solar backsheet generally has a three-layer structure. The weather-resistant layer is a f...

Claims

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Application Information

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IPC IPC(8): H01L31/049
CPCY02E10/50
Inventor 王莉李亚钊杨辉梁宏陆刘芳
Owner 乐凯胶片股份有限公司
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