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Low-melt-flow-index EVA three-layer composite white photovoltaic adhesive film

A photovoltaic film and layer composite technology, applied in the direction of adhesives, adhesive additives, films/sheets without carriers, etc. The effect of thickness

Inactive Publication Date: 2018-01-09
CHANGZHOU SVECK PHOTOVOLTAIC NEW MATERIAL
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved in the present invention is a low-melt EVA three-layer composite white photovoltaic adhesive film with low hot-melt fluidity and no risk of wrinkles and whitening

Method used

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  • Low-melt-flow-index EVA three-layer composite white photovoltaic adhesive film

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Embodiment Construction

[0021] Such as figure 1 As shown, the low-melt EVA three-layer composite white photovoltaic adhesive film of the present invention includes a middle white EVA layer 1 and an upper transparent EVA layer 2 and a lower transparent EVA layer 3 arranged on the middle white EVA layer. Contains white filler.

[0022] The materials used are:

[0023] Main material: Ethylene-vinyl acetate copolymer (EVA). The VA content is 33%, and the melt index is 7.5g / 10min.

[0024] Titanium dioxide: the surface is coated with organic matter, processed into 30-70% concentration of EVA white masterbatch before use.

[0025] Antioxidant: the main antioxidant is β-(3,5-di-tert-butyl-4-hydroxyphenyl) octadecyl propionate; the secondary antioxidant is tris(4-nonylphenol) phosphorous acid A complex of esters and tris(2,4-di-tert-butylphenyl)phosphite.

[0026] Cross-linking agent: the cross-linking curing agent is a compound of tert-butyl peroxide 2-ethylhexyl carbonate and 3,3-bis(tert-butyl peroxy...

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Abstract

The invention relates to the technical field of photovoltaic adhesive films, in particular to a low-melt-flow-index EVA three-layer composite white photovoltaic adhesive film, which comprises a middlewhite EVA layer, an upper transparent EVA layer and a lower transparent EVA layer, wherein the upper transparent EVA layer is arranged above the middle white EVA layer; the lower transparent EVA layer is arranged under the middle white EVA layer; the white EVA layer is prepared from the following ingredients in percentage by mass: 80 to 95 percent of low-melt-flow-index ethylene-vinyl acetate copolymer resin, 5 to 20 percent of white filling materials, 0.05 to 5 percent of antioxidants, 0.25 to 2 percent of cross linking agents and 0.1 to 4 percent of silane coupling agents. After the use ofthe structure, a manufactured product has a wide application range; the reflection rate reaches 90 percent or higher; the photoelectric conversion efficiency of a photovoltaic assembly can be improved; phenomena of bubbles, invisible cracks, drapes and whitening can be eliminated at the same time.

Description

technical field [0001] The invention relates to the technical field of photovoltaic adhesive films, in particular to a low-melt EVA three-layer composite white photovoltaic adhesive film. Background technique [0002] In the past ten years, due to technological progress and low cost, my country's photovoltaic industry has developed very rapidly. Since 2008, its output and output value have surpassed Germany, Japan and other photovoltaic powerhouses to rank first in the world. However, at present, the photoelectric conversion effect of solar cells is difficult to improve, and has been maintained between 18% and 19%. How to improve the photoelectric conversion efficiency of photovoltaic cells has become the focus of the world's photovoltaic industry and an important reference for the government's new energy industry layout. The current photoelectric conversion efficiency is still far from the theoretically calculated power generation efficiency of 26.8% to 30%. The sources of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/10C09J123/08C09J11/04C09J11/06H01L31/048B29C47/06
Inventor 曾金栋何胡送
Owner CHANGZHOU SVECK PHOTOVOLTAIC NEW MATERIAL
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