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Low-melt-index white EVA photovoltaic rubber film

A melting index, white technology, applied in the field of low melting index white EVA photovoltaic film, can solve the problems of easily overflowing white cells and busbars, white EVA film wrinkles, affecting the appearance of photovoltaic modules, etc., to eliminate air bubbles and hidden problems. effect of cracking, overcoming heavy loads, reducing the risk of wrinkling and whitening

Inactive Publication Date: 2018-01-19
CHANGZHOU SVECK PHOTOVOLTAIC NEW MATERIAL
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the deepening of research, the problems of wrinkles and whitening gradually emerged
Photovoltaic modules require high-temperature lamination to be cured and formed, and in order to solve the generation of air bubbles in the lamination process, vacuuming is required. Under the dual effects of air pressure and internal stress, the white EVA film appears wrinkled, and it is easy to spill white onto the battery sheet and bus bars, which not only affects the appearance of photovoltaic modules, but also reduces the power

Method used

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with specific embodiments.

[0020] The materials used are:

[0021] Main material: ethylene-vinyl acetate copolymer (EVA), VA content is 33%, melt flow rate is 1.0g / 10min~10g / 10min.

[0022] Titanium dioxide: particles of titanium dioxide, white carbon black or barium sulfate, the surface of which is coated with organic matter, processed into 30-70% EVA white masterbatch for use.

[0023] 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.

[0024] 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) ethyl butyrate; the auxiliary cross-linking agent is triallyl Compounds of isocyanurate, triallyl cyanurate and trimethylolpropane trimethac...

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Abstract

The invention relates to the technical field of photovoltaic film, in particular to low-melt-index white EVA photovoltaic rubber film. The low-melt-index white EVA photovoltaic rubber film is preparedfrom, by mass, 80-95% of low-melt-index ethylene-vinyl acetate copolymer resin, 0.05-5% of an antioxidant, 0.25-2% of a crosslinking agent, 0.1-4% of a silane coupling agent and 5-20% of white filler. Thelow-melt-index white EVA photovoltaic rubber film has the advantages that 1, through the adoption of low-melt-index EVA rubber particles, the hot-melting viscosity of the EVA rubber film can be increased greatly, the hot-melting fluidity of the EVA rubber film is reduced, and the risks of wrinkling and bleeding white in the process of lamination and vacuum pumping on the EVA rubber film are reduced; 2, through the preparation of the low-melt-index EVA white film by using a calendaring method, the defects that a tap casting method is large in loading and difficult in processing are overcome, not only processing is easy, but also the efficiency is greatly improved.

Description

technical field [0001] The invention relates to the technical field of photovoltaic adhesive films, in particular to a low melting point white EVA 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 these losses ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J123/08C09J11/04C09J11/06H01L31/048
CPCY02E10/50
Inventor 曾金栋何胡送
Owner CHANGZHOU SVECK PHOTOVOLTAIC NEW MATERIAL
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