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Method for producing resin composition for solar cell sealing material, resin composition for solar cell sealing material, solar cell sealing material, and solar cell module

一种太阳能电池、树脂组合物的技术，应用在密封装置、化学仪器和方法、电路等方向，能够解决质量下降、耗费时间、太阳能电池封装材料片材厚度不均匀等问题，达到低成本化、缩短加工时间、良好储存稳定性的效果

Active Publication Date: 2014-07-16
TOYO INK SC HOLD CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the method described in Patent Document 1, attention must be paid to the crosslinking reaction of the crosslinking agent when melt-kneading the raw material components, and even if extrusion kneading is carried out at a low temperature, it is practically unavoidable to avoid the formation of the melted resin composition. The cross-linking reaction of the cross-linking agent caused by the local shear heat generated
Therefore, due to the generation of partial cross-linking sites (so-called "graining") of ethylene-vinyl acetate copolymer, the resulting solar cell encapsulation material deteriorates in quality due to non-uniform sheet thickness or hampered transparency.
[0006] On the other hand, in the method described in Patent Document 2, since the mixture needs to be left for a whole day and night as described above, it takes time to manufacture the resin composition for encapsulating solar cells, and there are disadvantages such as poor productivity and cost. question

Method used

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  • Method for producing resin composition for solar cell sealing material, resin composition for solar cell sealing material, solar cell sealing material, and solar cell module
  • Method for producing resin composition for solar cell sealing material, resin composition for solar cell sealing material, solar cell sealing material, and solar cell module
  • Method for producing resin composition for solar cell sealing material, resin composition for solar cell sealing material, solar cell sealing material, and solar cell module

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0149] 3600 parts of granulated ethylene-vinyl acetate copolymers (A-1) and 400 parts of crosslinking agent (B-1) are added to the agitator (manufactured by Co., Ltd. Kawata) with a heating device with a capacity of 20 L, controlled as 40° C. and mixing at 500 rpm for 30 minutes to produce pellets of the resin composition for solar cell encapsulation materials. About this pellet, the measurement of the impregnation yield of a crosslinking agent (B-1) was performed. And, storage stability evaluation, caking evaluation, and appearance evaluation of the pellets were performed.

[0150] In addition, using the pellets obtained by this impregnation method, a test sheet (solar cell encapsulating material sheet) having a thickness of 100 μm was produced at a processing temperature of 80° C. using an extrusion tester (manufactured by Toyo Seiki Co., Ltd.). The test sheet was used to measure the number of pellets and evaluate its transparency quality.

[0151] Based on the results of ...

Embodiment 2～7、 comparative example 1～7

[0153] Use the ethylene-vinyl acetate copolymer shown in Table 2 and the crosslinking agent, and set the impregnation processing conditions as shown in Table 2, except that, others are all according to the steps identical with embodiment 1, manufacture solar cell A resin composition pellet for encapsulation material, and a test sheet was prepared using the pellet. Thereafter, in the same manner as in Example 1, measurement, each evaluation, and overall evaluation as a resin composition for a solar cell encapsulating material were performed.

Embodiment 8

[0157] With the same steps and impregnation processing conditions as in Example 1, use 3200 parts of granular ethylene-vinyl acetate copolymer (A-1) and 800 parts of crosslinking agent (B-1), to manufacture solar cell encapsulation materials Resin composition pellets, using the pellets to prepare test sheets. Thereafter, in the same manner as in Example 1, measurement, each evaluation, and overall evaluation as a resin composition for a solar cell encapsulating material were performed.

[0158] Table 2 shows the raw material components, impregnation processing conditions, and evaluation results of Examples 1-8 and Comparative Examples 1-8.

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Abstract

The object of the present invention is to provide a method for producing a resin composition for encapsulating solar cells, which reduces the cost by shortening the processing time, and the resin composition has good storage stability. Another object of the present invention is to provide a solar cell encapsulating material having good transparency without causing beading by using the obtained resin composition for a solar cell encapsulating material. The method for producing a resin composition for encapsulating solar cells according to the present invention is characterized in that it includes the step of preparing an ethylene-vinyl acetate copolymer (A) and a crosslinking agent (B) as raw material components, the ethylene-vinyl acetate The ester copolymer (A) has 25 to 35% by weight of vinyl acetate units, and the crosslinking agent (B) is immersed in the ethylene-vinyl acetate copolymer at a temperature of 23° C. for 24 hours relative to 1 g of ethylene-acetic acid The impregnation weight of the vinyl ester copolymer (A) is 40-80mg; at a temperature of 15-80°C, the crosslinking agent (B) is impregnated in the ethylene-vinyl acetate copolymer (A) process.

Description

technical field [0001] The present invention relates to a manufacturing method of a resin composition for solar cell encapsulation material, a resin composition for solar cell encapsulation material, a solar cell encapsulation material and a solar cell module. Background technique [0002] In recent years, with the increase of environmental problems, solar cells have attracted attention. A solar cell generally has a solar cell module as its constituent unit. This solar cell module has a structure in which cover glass / solar cell encapsulant / solar cell element / solar cell encapsulant / back sheet are laminated in this order from the side receiving sunlight. In addition, from the viewpoints of transparency, mechanical properties, and cost, a resin composition sheet made of ethylene-vinyl acetate copolymer is generally used as a solar cell encapsulation material. [0003] The resin composition, that is, the resin composition for solar cell encapsulation materials generally contai...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/048C08J3/22C08K5/14C08K5/54C08L23/08C09K3/10
CPCC09K2200/062C08K5/54C08J3/203C08K5/0025Y02E10/50B32B17/10697H01L31/048C09K3/10C09K2200/0622B32B17/10788C08J2323/08C08L23/0853C08J3/226C08J2423/08H01L31/0481C08L2666/04C08L23/08C08L31/04C08J3/22H01L31/04
Inventor 福留康弘酒井贵司
Owner TOYO INK SC HOLD CO LTD