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Solar battery sealing material

A technology for solar cells and sealing materials, applied in the field of solar cell sealing materials, can solve the problems of easy exudation of organic peroxides, decreased productivity, difficult to carry out, etc., achieves excellent adhesion, stable quality, and avoids processing problems. Effect

Inactive Publication Date: 2009-02-25
MITSUI LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the crosslinking of ethylene·(meth)acrylate copolymers by organic peroxides is difficult compared with the crosslinking of ethylene·vinyl acetate copolymers. The same heat resistance as the resin composition of the raw material polymer must be mixed with more organic peroxides
However, when a large amount of organic peroxide is blended into the ethylene-(meth)acrylate copolymer, the organic peroxide tends to bleed, which may cause slippage during sheet processing, resulting in a significant decrease in productivity. Or when manufacturing solar cell modules, the problem of swelling due to the decomposition gas of organic peroxides

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Mix the above-mentioned ethylene ethyl acrylate copolymer (EEA), organic peroxide (3), crosslinking aid (1), silane coupling agent, ultraviolet absorber and light-resistant stabilizer according to the ratio shown in Table 1 in advance, After 3 hours, a sheet having a thickness of 0.6 mm was produced at a processing temperature of 100° C. using a T-die extruder (40 mm in diameter, full flight screw, CR=2.6, L / D=26). The above-mentioned various evaluations were performed using this sheet. The results are shown in Table 1.

Embodiment 2

[0061] Except for changing the usage-amount of the organic peroxide (3) and crosslinking auxiliary agent (1) as shown in Table 1, sheet molding was performed similarly to Example 1, and it evaluated. The results are shown in Table 1.

Embodiment 3

[0063] Sheet molding was performed in the same manner as in Example 2 except that the organic peroxide (2) was used instead of the organic peroxide (3) at the ratio shown in Table 1, and this was evaluated. The results are shown in Table 1.

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Abstract

This invention provides a solar battery sealing material, which facilitates the preparation of a solar battery module and is excellent, for example, in fabricability, insulating properties, noncorrosive properties, transparency, heat resistance, and flexibility, and a solar battery module prepared using the same. The solar battery sealing material comprises a crosslinkable resin composition (A) comprising an ethylene-(meth)acrylic ester copolymer as a base polymer, an organic peroxide and a crosslinking aid. The decomposition temperature (one-hr half-reduction period temperature) of the organic peroxide is 150 C or below. The total amount of the organic peroxide and the crosslinking aid incorporated is in the range of 0.5 to 5 parts by weight based on 100 parts by weight of the base polymer. The mixing weight ratio between the organic peroxide and the crosslinking aid (organic peroxide / crosslinking aid) is in the range of 1 / 5 to 1 / 0.1.

Description

technical field [0001] The invention relates to a sealing material for solar battery elements in a solar battery module and a solar battery module made of the sealing material. More specifically, it relates to a sealing material that is easy to manufacture a solar cell module and is excellent in processability, insulation, corrosion resistance, transparency, heat resistance, flexibility, and the like. Background technique [0002] Hydropower, wind power, and solar power, which utilize inexhaustible natural energy and can reduce carbon dioxide and improve other environmental issues, have attracted attention. Among them, solar power generation has significantly improved performance such as power generation efficiency of solar cell modules, while prices have continued to decrease, and the country and local governments have launched projects to promote the introduction of residential solar power generation systems. Therefore, in recent years, the spread of solar power generation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/04H01L31/042C09J5/00C09J7/00
CPCB32B17/10743Y02E10/50H01L31/048B32B17/10678B32B17/10697
Inventor 西岛孝一细合康久新家洋一
Owner MITSUI LTD
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