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Ethylene vinyl acetate (EVA) adhesive film for solar cell and preparation method thereof

A technology of solar cells and adhesive films, applied in circuits, adhesives, photovoltaic power generation, etc., can solve problems such as backward quality and immature EVA film formula, and achieve improved adhesion, improved UV aging resistance, and improved humidity and heat aging. Effect

Inactive Publication Date: 2012-05-02
宁波威克丽特功能塑料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The immature formula of domestic EVA film has caused the quality of domestic film products to lag behind foreign products. It is necessary to conduct in-depth analysis of the cross-linking and additive action mechanism of EVA film and develop new formulas.

Method used

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  • Ethylene vinyl acetate (EVA) adhesive film for solar cell and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] In parts by mass, 1.0 parts of 1,1-bis(tert-butylperoxy)-3,3,5-trimethylcyclohexane, 0.2 parts of triallyl isocyanurate, 0.2 Parts of β(3,5-di-tert-butyl-4-hydroxyphenyl) octadecyl propionate, 0.2 parts of tris(2,4-di-tert-butylphenol) phosphite, 0.3 parts of ethyl- 2,2,6,6-Tetramethyl-4-hydroxypiperidine succinate, 0.2 parts of 2-(2'-hydroxy-3'-tert-butyl-5'-octyl propionate)-benzotri Azole, 0.2 part of γ-methacryloxypropyl trimethoxysilane, 0.5 part of maleic anhydride grafted EVA pellets (MAH≥1%) are mixed uniformly; Rock in the feed at 50°C for 4h. The mixture is sucked into the upper hopper of the extruder, the temperature of the extruder is controlled between 45-65°C, the temperature of the die is controlled between 70-90°C, and the mixture is cast, cooled, drawn and coiled to obtain the thickness 0.5mm EVA film C1.

Embodiment 2

[0037] In parts by mass, 1.5 parts of 1,1-bis(tert-butylperoxy)-3,3,5-trimethylcyclohexane, 0.2 part of triallyl isocyanurate, 0.2 Parts of β (3,5-di-tert-butyl-4-hydroxyphenyl) octadecyl propionate, 0.2 parts of three (2,4-di-tert-butylphenol) phosphite, 0.2 parts of poly{[ 6-[(1,1,3,3-tetramethylbutyl)-amino]1,3,5-triazine-2,4-diyl][(2,2,6,6-tetramethyl Piperidinyl)-imino]-1,6-hexanediyl-[(,2,6,6-tetramethylpiperidinyl)-imino}, 0.1 parts of 2-(2′- Hydroxy-3'-tert-butyl-5'-propionate octyl)-benzotriazole, 0.1 part of γ-methacryloxypropyl trimethoxysilane, 1.0 part of maleic anhydride grafted EVA pellets ( MAH≥1%) and mix well; add to 100 parts of EVA pellets with VA content of 33% and rock at 55°C for 4h. The mixture is sucked into the upper hopper of the extruder, the temperature of the extruder is controlled between 50-75°C, the temperature of the die is controlled between 85-100°C, and the mixture is cast, cooled, drawn and coiled to obtain the thickness 0.5mm EVA film C2...

Embodiment 3

[0039] In terms of parts by mass, 1.0 parts of o-tert-butyl-o-(2-ethylhexyl) monoperoxycarbonate, 0.2 parts of triallyl cyanurate, 0.2 parts of β(3,5- Di-tert-butyl-4-hydroxyphenyl) propionic acid, 0.2 parts of tris(2,4-di-tert-butylphenol) phosphite, 0.2 parts of ethyl-2,2,6,6-tetramethyl-4 -Hydroxypiperidine succinate, 0.1 part of 2-(2'-hydroxy-3'-tert-butyl-5'-octyl propionate)-benzotriazole, 0.2 part of γ-methacryloxypropyl Base trimethoxysilane, 0.5 parts of maleic anhydride grafted EVA pellets (MAH ≥ 1%) and mix well; add to 100 parts of EVA pellets with VA content of 33% and rock at 50°C for 4h. The mixture is sucked into the upper hopper of the extruder, the temperature of the extruder is controlled between 45-70°C, the temperature of the die is controlled between 85-100°C, and the mixture is cast, cooled, drawn and coiled to obtain the thickness 0.5mm EVA film C3.

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Abstract

The invention relates to an EVA adhesive film for a solar cell and a preparation method thereof. The EVA adhesive film comprises the following components in part by mass: 100 parts of ethylene-vinyl acetate copolymer, 0.1 to 5 parts of peroxide crosslinking curing agent, 0.1 to 5 parts of auxiliary crosslinking agent, 0.01 to 5 parts of composite antioxygen, 0.01 to 5 parts of hindered amine light stabilizer, 0.01 to 5 parts of ultraviolet absorber, 0.01 to 5 parts of silane coupling agent and 0.1 to 5 parts of graft modified EVA adhesive particles. The preparation method comprises: (1) mixing the raw materials, rocking under a heating condition, cooling and obtaining EVA master batch; and (2) subjecting the EVA master batch to melting, heating, casting, cooling drawing and winding, and obtaining the EVA adhesive film. In the invention, the lamination time of the EVA adhesive film is within 10 minutes, the adhesion force is big, the damp and heat resistance and ultraviolet aging resistance are high, and the service life of the EVA adhesive film is more than 25 years. The preparation method disclosed by the invention is easy to operate and has a bright application prospect.

Description

technical field [0001] The invention belongs to the field of preparation of EVA adhesive films, in particular to a preparation method of EVA adhesive films for solar cells. Background technique [0002] Solar cells use the quantum effect of semiconductor materials such as silicon to generate electricity, directly converting visible light in sunlight into electrical energy. However, the photoelectric conversion efficiency of silicon wafers directly exposed to the atmosphere will be attenuated. Therefore, it is necessary to use a transparent, aging-resistant, good adhesive film, which can withstand atmospheric changes and has elasticity to encapsulate the silicon wafer. The protective material glass and the lower protective material TPT are bonded together to ensure the service performance and life of the solar cell. [0003] In the 1980s, Czanderna et al. used Elvax150 resin (33% VA content) produced by DuPont as raw material to develop EVA solar encapsulation film. Soon, J...

Claims

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Application Information

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IPC IPC(8): C09J7/00C09J123/08C09J151/06C09J11/06H01L31/048B29C47/92B29C48/92
CPCY02E10/50B29C48/08B29C48/92B29C2948/92704B29C2948/92895B29C2948/92904
Inventor 张发饶周玉波
Owner 宁波威克丽特功能塑料有限公司
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