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Ethylene-vinyl acetate copolymer packaging thin film

A vinyl acetate, packaging film technology, applied in photovoltaic power generation, electrical components, circuits, etc., can solve the problems of increasing energy consumption of solar cell modules, reducing production efficiency, slow decomposition speed, etc., to reduce crosslinking agent residues, improve Production efficiency, the effect of reducing energy consumption

Inactive Publication Date: 2012-03-28
DONGFANG TURBINE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent literature discloses a "Sealing Film for Solar Cells and Solar Cells Using It" (publication number: CN101617410, publication date: 2009.12.30), which uses organic peroxides with high activation energy as crosslinking agents, leaving crosslinking The reaction activity of the linking agent is low, which improves the aging resistance of the film. However, due to the high activation energy of the crosslinking agent used, the film has the defects of high decomposition temperature and slow decomposition speed in the application process, which directly increases the performance of solar cells. Energy consumption during component production, which also reduces production efficiency

Method used

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  • Ethylene-vinyl acetate copolymer packaging thin film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The ratio of raw materials of the present invention is calculated in the following parts by weight.

[0031] Ethylene-vinyl acetate copolymer-100 parts, the vinyl acetate content in the ethylene-vinyl acetate copolymer is 25%;

[0032] Crosslinking agent: ortho-tert-butyl-o-(2-ethylhexyl) monoperoxycarbonate-0.1 part;

[0033] Auxiliary cross-linking agent: triallyl isocyanurate-0.1 part, the combination of triallyl isocyanurate and o-tert-butyl-o-(2-ethylhexyl) monoperoxycarbonate The ratio is 1:1;

[0034] Antioxidant: tetrakis (β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate) pentaerythritol ester-0.1 part;

[0035] Ultraviolet light absorber: 2-hydroxy-4-methoxybenzophenone-0.1 part;

[0036] Light stabilizer: bis(2,2,6,6-tetramethyl-4-piperidinyl) sebacate - 0.1 part;

[0037] Tackifier: γ-methacryloxypropyltrimethoxysilane - 0.4 parts.

[0038] Mix the above components evenly, and extrude the mixture through the extruder after blending, the temperature is co...

Embodiment 2

[0040] The ratio of raw materials of the present invention is calculated in the following parts by weight.

[0041] Ethylene-vinyl acetate copolymer-100 parts, the vinyl acetate content in the ethylene-vinyl acetate copolymer is 25%;

[0042]Crosslinking agent: 2,5-dimethylhexane-2,5-di-tert-butyl peroxide-1.0 parts;

[0043] Auxiliary cross-linking agent: triallyl cyanurate-0.2 parts, the ratio of triallyl cyanurate to 2,5-dimethylhexane-2,5-di-tert-butyl peroxide 1:5;

[0044] Antioxidant: β-(4-hydroxyphenyl-3,5-di-tert-butyl) n-octadecyl propionate-0.5 part, 2,6-di-tert-butyl-4-methylphenol-0.5 share;

[0045] Ultraviolet light absorber: 2-hydroxyl-4-n-octyloxybenzophenone-0.3 parts;

[0046] Light stabilizer: bis(2,2,6,6-tetramethyl-4-piperidinyl) sebacate - 0.2 parts;

[0047] Tackifier: γ-methacryloxypropyltrimethoxysilane - 0.5 parts.

[0048] The preparation method is the same as in Example 1.

Embodiment 3

[0050] The ratio of raw materials of the present invention is calculated in the following parts by weight.

[0051] Ethylene-vinyl acetate copolymer-100 parts, the vinyl acetate content in the ethylene-vinyl acetate copolymer is 28%;

[0052] Crosslinking agent: 1,1-bis(tert-butyl peroxide)-3,3,5-trimethylcyclohexane-1.0 parts;

[0053] Auxiliary cross-linking agent: triallyl isocyanurate - 10.0 parts, triallyl isocyanurate and 1,1-di(tert-butyl peroxide)-3,3,5-trimethyl The ratio of cyclohexane is 10:1;

[0054] Antioxidant: β-(4-hydroxyphenyl-3,5-di-tert-butyl) n-octadecyl propionate-0.2 parts, 2,6-di-tert-butyl-4-methylphenol-0.3 share;

[0055] UV absorber: 2-(2'-hydroxy-3'-tert-butyl-5'-methylphenyl)-5-chlorobenzotriazole-0.2 parts;

[0056] Light stabilizer: bis(2,2,6,6-tetramethyl-4-piperidinyl) sebacate - 0.4 parts;

[0057] Tackifier: γ-methacryloxypropyltrimethoxysilane - 1.0 parts.

[0058] The preparation method is the same as in Example 1.

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Abstract

The invention discloses an ethylene-vinyl acetate copolymer packaging thin film, which is used for packaging solar cell components. The thin film is prepared from the following raw materials in part by weight: 100 parts of an ethylene-vinyl acetate copolymer, 0.1 to 2.0 parts of crosslinking agent, 0.1 to 10.0 parts of aid crosslinking agent and a proper amount of aid. The ethylene-vinyl acetate copolymer contains 25 to 33 percent of vinylacetate, and the ratio of the amount of the aid crosslinking agent and the crosslinking agent is 1:10 to 10:1. In the invention, the introduction of the aid improves the network structure of crosslinked resin, improves crosslinking efficiency, greatly reduces the dosage and residue of the crosslinking agent greatly and avoids aging phenomenon caused by residual crosslinking agent, and the prepared thin film has higher dampness and heat resistance, high ultraviolet resistance, high thermal-oxidative aging resistance and the like and has long service life.

Description

technical field [0001] The invention relates to a sealing film, in particular to an ethylene-vinyl acetate copolymer packaging film used for packaging solar cell modules. Background technique [0002] With the depletion of traditional fossil energy, clean and renewable energy represented by solar energy has come into the spotlight. At present, the use of solar energy is not very popular. The main limitation to the large-scale application of solar energy is the cost issue. Although the silicon wafer itself as a solar cell has a service life of more than 30 years, the sealant that protects the silicon wafer from external erosion The working life is much shorter. In the harsh outdoor weather environment, the sealant will quickly age and turn yellow, or even degummed and cracked, which will cause the solar cell module to be cracked or eroded by the weather, resulting in a decrease in the photoelectric conversion efficiency of the entire cell module or failure due to short circu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08H01L31/048C08K5/14C08K5/103C08K5/3415C08K5/098C08K5/3492
CPCY02E10/50
Inventor 黄赋卢毅王伟崔隆宇
Owner DONGFANG TURBINE CO LTD
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