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Bonding attenuation resistant EVA (Ethylene-Vinyl Acetate) packaging film for solar packaging material

A technology of solar energy encapsulation and encapsulation adhesive film, applied in adhesives, polymer adhesive additives, non-polymer adhesive additives, etc., can solve the problems of adhesive performance attenuation, accelerated destruction, etc., and achieve thermal expansion and contraction resistance Strong ability, long-term use, and high cross-linking effect

Inactive Publication Date: 2018-02-13
ZHEJIANG DILONG PHOTOELECTRICITY MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, under the action of water, the high temperature environment will accelerate the destruction of the hydrogen bonds and Si-O-Si bonds on the surface of the EVA film and glass, etc., resulting in rapid attenuation of the bonding performance.

Method used

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  • Bonding attenuation resistant EVA (Ethylene-Vinyl Acetate) packaging film for solar packaging material
  • Bonding attenuation resistant EVA (Ethylene-Vinyl Acetate) packaging film for solar packaging material
  • Bonding attenuation resistant EVA (Ethylene-Vinyl Acetate) packaging film for solar packaging material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A solar cell encapsulation adhesive film, containing EVA, a crosslinking agent, an ultraviolet absorber, a coupling agent, an antioxidant, and an anti-hydrolysis agent; the crosslinking agent in the solar cell encapsulation adhesive film is 2,5-di-tert-butyl Peroxide-2,5-dimethylhexane, its quality is 0.5% of the EVA mass; the content of vinyl acetate in the EVA is 28%; the ultraviolet absorber is 2-hydroxyl-4-n-octyloxy Benzophenone, its quality is 0.2%% of EVA quality; Described antioxidant is three (2,4-di-tert-butylphenyl) phosphite, and its quality is 0.1% of EVA quality; Described coupling The agent is an addition reaction product of isocyanate propyltriethoxysilane, and its mass is 0.3% of the EVA mass; the anti-hydrolysis agent is carbodiimide, and its mass is 0.1% of the EVA mass. All kinds of additives are dissolved in xylene and then sprayed on the surface of EVA resin. After the EVA resin is mixed evenly by the mixer, it is put into the casting machine, and ...

Embodiment 2

[0044] A solar cell encapsulation adhesive film, containing EVA, a crosslinking agent, an ultraviolet absorber, a coupling agent, an antioxidant, and an anti-hydrolysis agent; the crosslinking agent in the solar cell encapsulation adhesive film is dicumyl peroxide, which The quality is 0.8% of the EVA quality; the content of vinyl acetate in the EVA is 32%; the ultraviolet absorber is 2-hydroxyl-4-n-octyloxybenzophenone, and its quality is 0.2% of the EVA quality ; The antioxidant is 3,5-di-t-butyl-4-hydroxyphenylpropionate octadecyl, and its quality is 0.1% of the EVA quality; the coupling agent is polymethylene polyphenylisocyanate trimethoxy The base silane addition reaction product has a mass of 0.4% of the EVA mass, and the anti-hydrolysis agent is carbodiimide, and its mass is 0.1% of the EVA mass. All kinds of additives are dissolved in xylene and sprayed on the surface of EVA resin. The EVA resin is mixed evenly by a mixer and put into a casting machine. After plastici...

Embodiment 3

[0051] A solar cell encapsulation adhesive film, containing EVA, a crosslinking agent, an ultraviolet absorber, a coupling agent, an antioxidant, and an anti-hydrolysis agent; the crosslinking agent in the solar cell encapsulation adhesive film is tert-butyl peroxide cumene , its quality is 0.5% of the EVA quality; the content of vinyl acetate in the EVA is 30%; the ultraviolet absorber is 2-hydroxyl-4-n-octyloxybenzophenone, its quality is 0.2% of the EVA quality %%; the antioxidant is three (2,4-di-tert-butylphenyl) phosphite, and its quality is 0.1% of the EVA quality; the coupling agent is 3-isocyanatopropyl trimethoxy The base silane addition reaction product, its quality is 0.4% of EVA quality; The anti-hydrolysis agent is carbodiimide, its quality is 0.2% of EVA quality. Dissolve various additives in dichloromethane and spray on the surface of the EVA resin. The EVA resin is mixed evenly by a mixer and then put into the casting machine. After plasticizing at 75°C, extru...

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Abstract

The invention relates to a solar cell packaging film and aims to provide a bonding attenuation resistant EVA (Ethylene-Vinyl Acetate) packaging film for a solar packaging material and a preparation method of the EVA packaging film. The EVA packaging film has high anti-pressure ability, resistance to thermal expansion and cold contraction, water resistance and heat resistance and has the characteristic of being long in service life. The preparation method has the characteristics of being simple in process flow and high in production efficiency. According to the technical scheme, the bonding attenuation resistant EVA packaging film for the solar packaging material comprises the following corresponding components in parts by mass: 100 parts of EVA resin with VA content of 20-40%, 0.3-0.8 partof a cross-linking agent, 0.2-0.4 part of a coupling agent, 0.2-0.5 part of an ultraviolet light absorber, 0.1-0.3 part of an antioxidant and 0.1-0.3 part of a hydrolysis resistant agent.

Description

technical field [0001] The invention relates to a solar cell encapsulation adhesive film, in particular to an EVA encapsulation adhesive film resistant to adhesion attenuation Background technique [0002] The solar cell is composed of five layers of tempered glass, encapsulation film, cell sheet, encapsulation film and TPT backplane, stacked in sequence and then pressed together. [0003] The solar cell encapsulation film is mainly made of EVA (ethylene-vinyl acetate copo; ethylene-vinyl acetate copolymer); EVA has the characteristics of transparency, softness, hot-melt adhesiveness, low melting temperature, and good melt fluidity. These features meet the needs of film manufacturing and solar cell packaging, but its heat resistance is poor, and it is easy to be decomposed and aged by water vapor erosion; especially unmodified EVA has poor heat resistance, easy extension and low elasticity. The cohesive strength is low and the creep resistance is poor, and it is easy to cau...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J123/08C09J11/06C09J11/08
CPCC09J123/0853C08L2201/08C08L2203/16C08L2203/204C08L2203/206C09J11/06C09J11/08C08L43/04C08K5/14C08K5/132C08K5/526C08K5/29
Inventor 张传吉陈永明俞一帆
Owner ZHEJIANG DILONG PHOTOELECTRICITY MATERIAL
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