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Film for solar cell backside protective film

A back protective film and solar cell technology, which can be used in circuits, photovoltaic power generation, electrical components, etc., can solve expensive problems, achieve excellent hydrolysis resistance, and maintain the effect of discharge start voltage

Inactive Publication Date: 2013-01-02
TEIJIN DUPONT FILMS JAPAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] As a sheet-like member used as a protective film, a fluorine-based resin film is known, but it is expensive. In recent years, a single-layer film or a multi-layer film of a polyester film has been studied.

Method used

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  • Film for solar cell backside protective film
  • Film for solar cell backside protective film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0083]Put 85 parts by weight of dimethyl terephthalate and 60 parts by weight of ethylene glycol into a reactor, use 0.08 parts by weight of calcium acetate as a catalyst, and raise the temperature to 240° C. under a nitrogen atmosphere to perform transesterification. After the distilled amount of methanol reached 90% or more relative to the theoretical amount, the addition was adjusted to contain 10% by weight of trimethyl phosphate as a phosphorus compound so that it was 0.18% by weight relative to the polymer, and the average particle size was 350 ppm relative to the polymer. An ethylene glycol solution of bulk silica particles with a diameter of 1.5 μm was added, and then 0.03 parts by weight of antimony trioxide was added as a polymerization catalyst. Then, slowly heat up and decompress according to the conventional method, and at the point in time when the specified melt viscosity is finally reached, N, N'-dicyclohexylcarbodiimide (Matsumoto Made by Oil Pharmaceutical Co...

Embodiment 2

[0087] Except having changed the addition amount of a carbodiimide compound as shown in Table 1, it carried out similarly to Example 1, and produced the film for solar cell back surface protection films, and a solar cell back surface protection film. The measurement results are shown in Table 1.

Embodiment 3

[0089] Using a twin-screw kneading extruder NEXT-60 manufactured by Kobe Steel Co., Ltd., polyethylene terephthalate FK-OM manufactured by Teijin Fibers Co., Ltd. was supplied as carbodiimide at a weight ratio of 100:5. Compound N, N'-dicyclohexylcarbodiimide (manufactured by Matsumoto Yuyu Pharmaceutical Co., Ltd., molecular weight = 206) was melt-kneaded at a speed of 120 kg / h, and extruded to obtain a polyparaffin with an intrinsic viscosity of 0.86. Ethylene phthalate composition. Using this composition, it carried out similarly to Example 1, and produced the film for solar cell back surface protective films, and the solar cell back surface protection film. The measurement results are shown in Table 1.

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Abstract

A film for solar cell back sheet includes a biaxially oriented polyester film. The biaxially oriented polyester film includes a polyester composition including 100 parts by weight of a polyester and 0.1 to 10 parts by weight of a carbodiimide compound, being mixed therein. Thereby, there is provided the film for solar cell back sheet which can keep the partial discharge start voltage high over a long period, and further is excellent in hydrolysis resistance.

Description

technical field [0001] This invention relates to the film for solar cell back surface protection films containing polyester. Background technique [0002] As one of the means of generating electricity using clean energy, solar power generation systems are gradually becoming popular. Solar cell panels used in photovoltaic power generation systems, such as those described in JP-6-38264, usually sandwich a plurality of plate-shaped solar cell elements between a glass substrate on the light-receiving side and a protective film on the back side, and the internal gap Structure filled with sealing resin. [0003] As a sheet member used as a protective film, a fluororesin film is known, but it is expensive, and in recent years, a single-layer film or a multilayer film of a polyester film has been studied. Contents of the invention [0004] The problem to be solved by the invention [0005] The solar cell back protection film is a structural material that protects the power gene...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/04C08J5/18C08L67/00C08L79/00
CPCC08J2367/02Y02E10/50C08J5/18H01L31/048C08K5/29H01L31/049
Inventor 冈田真一郎松村直子小山松淳
Owner TEIJIN DUPONT FILMS JAPAN