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Photovoltaic polyolefin encapsulating adhesive film

A technology for encapsulating adhesive films and polyolefins. It is used in applications, adhesives, household appliances, etc. It can solve problems such as differences in glass batch stability, decreased adhesion between polyolefin films and glass, and delamination of polyolefin films. , to reduce the phenomenon of salting out, solve the delamination of polyolefin packaging film, and improve the hydrophobicity

Active Publication Date: 2018-11-13
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

However, the technology related to polyolefin film is not yet mature enough. When making single-glass components to accelerate the aging due to humidity and heat, due to the difference in the stability of glass batches, the problem of serious decline in the adhesion between polyolefin film and glass often occurs. At the same time, the pH value of the interface between the glass and the polyolefin film is as high as 13 or more. Even if a grafted adhesion-enhancing resin is added to the polyolefin encapsulation film formulation system, this problem cannot be solved; During aging, delamination of the polyolefin film often occurs at the four corners of the module

Method used

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  • Photovoltaic polyolefin encapsulating adhesive film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Ethylene-1-octene random copolymer (Dow Chemical ENGAGE 8137) 100g, in which 0.1g tert-butylperoxycarbonate-2-ethylhexyl ester was added as a crosslinking agent, and 0.1g trimethylolpropane trimethyl Base acrylate as a crosslinking agent, 2g of anti-aging agent (containing 0.8g of 2,2'-dihydroxy-4-methoxybenzophenone as a UV absorber, 0.6g of Lowilite-62 and Lowilite- 94 weight ratio 1:1 mixture as light stabilizer, 0.2g of tetra[methyl-β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate]pentaerythritol ester and 0.1g of tri (2,4-Di-tert-butylphenyl) phosphite as an antioxidant, 0.2g of nano-magnesium hydroxide as an acid absorbent, 0.1gMgAl(CO 3 )(OH)·nH 2 O as a metal ion trapping agent), 0.05g γ-(methacryloxy)propyltrimethoxysilane as a silane coupling agent, 4g hydrogenated C5 petroleum resin (Puyang Kairuide Petroleum Resin Co., Ltd. BT100, softening point 90-100°C) as a stabilizer. The uniformly mixed materials are added to the melt-extrusion casting machine for extru...

Embodiment 2

[0046] Propylene-ethylene random copolymer (Dow Chemical VERSIFY 3401) 100g, in which 2.5g of tert-butylperoxycarbonate-2-ethylhexyl ester was added as a crosslinking agent, and 0.5g of pentaerythritol tetramethacrylate was used as a crosslinking aid Coupling agent, 0.05g anti-aging agent (containing 0.05 parts of Lowilite-62 and Lowilite-94 weight ratio 1:1 mixture as light stabilizer), 10g silane grafted POE, 0.05 parts of γ-(methacryloyloxy) ) Propyltrimethoxysilane is used as a silane coupling agent, and 0.7g of n-octyltriethoxysilane is used as a stabilizer. The uniformly mixed materials are added to the melt-extrusion casting machine for extrusion, and the temperature is controlled at 100°C. The extrudate is cast, cooled, drawn, and crimped to obtain a polyolefin encapsulating film with a thickness of 0.45 mm.

Embodiment 3

[0048] Propylene-ethylene random copolymer (ExxonMobil Vistamaxx 6202FL) 100g, in which 2g tetracosyl peroxydicarbonate is added as a crosslinking agent, 3g 1,3,5-triallyl-s-triazine- 2,4,6-triketone is used as a crosslinking agent, 1g of anti-aging agent (0.1g of Lowilite-62 and Lowilite-94 weight ratio 1:1 mixture as light stabilizer, 0.2g of tetra[methyl- A mixture of β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester and 0.1 g of tris(2,4-di-tert-butylphenyl) phosphite as an antioxidant , 0.3g of nano-magnesium hydroxide as acid absorbent, 0.3gMgAl(CO 3 )(OH)·nH 2 O is used as a metal ion trap), 1 g of vinyl ethoxysilane is used as a silane coupling agent, and 0.5 g of paraffin wax (Honeywell AC1702, softening point 90°C) is used as a stabilizer. The uniformly mixed materials are added to the melt-extrusion casting machine for extrusion, and the temperature is controlled at 100°C. The extrudate is cast, cooled, drawn, and crimped to obtain a polyolefin ...

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Abstract

Provided is a photovoltaic polyolefin encapsulating adhesive film. A stabilizer is added to the encapsulating adhesive film. The encapsulating adhesive film comprises, by mass parts, 100 parts of olefin copolymer, 0.1-3 parts of crosslinking agent, 0.1-3 parts of auxiliary crosslinking agent, 0.05-2 parts of anti-aging agent, 0.05-2 parts of silane coupling agent, and 0.05-4 parts of stabilizer. According to the photovoltaic polyolefin encapsulating adhesive film, when an assembly is laminated, a long-chain alkane or a long-chain siloxane protective layer is formed at the interface between glass and the polyolefin encapsulating adhesive film, thereby improving the hydrophobicity of the glass; the chance of direct contact of moisture with the glass is significantly reduced, thereby reducingthe salting out of the glass in the assembly hygrothermal aging process, the pH of the interface between the glass and the polyolefin encapsulating adhesive film is maintained between 7 and 11, and the adhesion between the polyolefin encapsulating adhesive film and the glass is maintained.

Description

Technical field [0001] The invention belongs to the field of photovoltaic new energy materials, and specifically relates to a polyolefin encapsulating film for photovoltaics. Background technique [0002] The packaging material of solar cell modules can provide protection for solar cell modules. Currently, the widely used packaging material is ethylene-vinyl acetate copolymer (EVA). In a long-term high temperature and high humidity environment, the EVA film is easily hydrolyzed and releases acetic acid corrosion. Circuits cause component resistance to increase and power generation to decrease; at the same time, acetic acid is also one of the causes of snail patterns. Solar cell modules have been used in high-voltage environments for a long time. Due to the insufficient insulation of the EVA film, wet leakage current channels are easily generated between the EVA film, the back sheet, the glass and the frame, and a large amount of charge is accumulated on the surface of the cell, m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D4/06C09D4/02C09D11/04C09D11/06C09J7/10C09J7/30
CPCC09D4/06C09D11/04C09D11/06C09J7/10C09J7/30
Inventor 范云峰徐晓龙白玉清孟丹李茜茜李华锋柳青
Owner 乐凯胶片股份有限公司
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