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Preparing method of high reflectance rate ethylene-vinyl-acetate copolymer composition

A technology of vinyl acetate copolymerization and compound composition, which is applied in the direction of non-polymer adhesive additives, photovoltaic power generation, adhesive additives, etc., can solve the problems of short service life of EVA film, increase the reuse rate, improve Utilization rate, effect of improving long-term service life and photoelectric conversion efficiency

Inactive Publication Date: 2012-07-04
GUANGZHOU LUSHAN NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the service life of the EVA film is not long

Method used

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  • Preparing method of high reflectance rate ethylene-vinyl-acetate copolymer composition
  • Preparing method of high reflectance rate ethylene-vinyl-acetate copolymer composition
  • Preparing method of high reflectance rate ethylene-vinyl-acetate copolymer composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026]Take 100 parts by mass of ethylene-vinyl acetate copolymer (EVA), wherein the weight content of vinyl acetate (VA) is 9%, and the melt index is 5g / 10min. Add 0.5 mass parts of crosslinking agent dicumyl peroxide, 0.05 mass parts of antioxidant tris (2,4-di-tert-butylphenyl) phosphite, 0.05 mass parts of light stabilizer 2,4- Dichloro-6-(4-morpholino)-1,3,5-triazine, 1.0 parts of tackifier vinyltrimethoxysilane, 0.01 parts by mass of fluorescent whitening agent 2,5-bis(5 -tert-butyl-2-benzoxazolyl)thiophene and 0.5 parts by mass of titanium dioxide are evenly mixed, put into a single-screw casting machine, the processing temperature is 80°C, and melt extrusion, stretching, traction, and collection Rolled into an EVA film with a thickness of 0.5mm.

Embodiment 2

[0028] Take 100 parts by mass of EVA resin, wherein the VA weight content is 33%, and the melt index is 40g / 10min. Add 1.5 mass parts of crosslinking agent dicumyl peroxide, 0.3 mass parts of antioxidant tris (2,4-di-tert-butylphenyl) phosphite, 0.3 mass parts of light stabilizer 2,4- Dichloro-6-(4-morpholinyl)-1,3,5-triazine, the tackifier vinyltrimethoxysilane of 0.1 mass part, the optical brightener 2 of 0.8 mass part, the 5-bis( 5-tert-butyl-2-benzoxazolyl) thiophene and 7 parts by mass of titanium dioxide were uniformly mixed, put into a single-screw casting machine, and the processing temperature was 80°C, after melt extrusion, stretching, traction, Winding is made into an EVA film with a thickness of 0.5mm.

Embodiment 3

[0030] Take 100 parts by mass of EVA resin, wherein the VA weight content is 28%, and the melt index is 20g / 10min. Add 2 mass parts of crosslinking agent dicumyl peroxide, 1 mass part of antioxidant tris (2,4-di-tert-butylphenyl) phosphite, 0.1 mass part of light stabilizer 2,4- Dichloro-6-(4-morpholinyl)-1,3,5-triazine, 1.5 parts by mass of tackifier vinyltrimethoxysilane, 3 parts by mass of optical brightener 2,5-bis( 5-tert-butyl-2-benzoxazolyl) thiophene and 15 parts by mass of titanium dioxide were uniformly mixed and put into a single-screw casting machine at a processing temperature of 80°C. After melt extrusion, stretching, traction, Winding is made into an EVA film with a thickness of 0.5mm.

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Abstract

The invention discloses a preparing method of high reflectance rate ethylene-vinyl-acetate copolymer composition, which is characterized by containing the following components by weight proportion: 100 parts of ethylene-vinyl-acetate copolymer, 0.5-2 parts of cross-linking agent, 0.05-1 part of antioxidant, 0.05-0.5 part of light stabilizer, 0.1-1.5 parts of tackifier, 0.01-3 parts of fluorescent whitening agent and 0.5-15 parts of additive with a high reflection function. The ethylene-vinyl-acetate copolymer and the other functional additives are performed with premixing, fusing extruding and tape casting or calendaring for film forming, and finally are wound up to manufacture a high reflection rate ethylene vinyl acetate copolymer (EVA) packaging glue film. The preparing method of high reflectance rate ethylene-vinyl-acetate copolymer composition does not add organic ultraviolet absorber, thereby reducing yellowing effect on the glue film caused by the ultraviolet absorber. In addition, the preparing method of high reflectance rate ethylene-vinyl-acetate copolymer composition improves yellowing resistance and ultraviolet radiation resistance of the glue film by adding fluorescent whitening agent and high reflection additive. Simultaneously, reused ratio of light rays is increased, and finally long period service life of a photovoltaic assembly can be prolonged and photoelectric conversion efficiency of the photovoltaic assembly can be improved.

Description

technical field [0001] The invention relates to an EVA encapsulation adhesive film, in particular to a preparation method of an ethylene-vinyl acetate copolymer composition with high reflectivity. Background technique [0002] With the rising price of crude oil and the impact of Japanese nuclear radiation, the widespread use of clean energy represented by solar energy has become an inevitable trend. It is estimated that the total installed capacity of photovoltaics in the world will reach 18GW in 2011, and in the next five years, domestic photovoltaic module production will continue to maintain a high growth rate of more than 30%, so the photovoltaic market has a very bright prospect. However, due to the good prospects of the photovoltaic market, a large number of photovoltaic enterprises have large-scale production expansion plans in 2011, and some new enterprises have begun to set foot in this industry, making the competition very fierce, and even began to have overcapacit...

Claims

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Application Information

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IPC IPC(8): C09J123/08C09J11/06C09J11/04C09J7/00H01L31/048
CPCY02E10/50
Inventor 余鹏李伟博石俊杰唐舫成汪加胜
Owner GUANGZHOU LUSHAN NEW MATERIALS
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