Back protection film of solar cell

A technology for back protection film and solar cells, which is applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problems of interlayer detachment, and achieve the effect of improving adhesion, good hydrolysis resistance, and not easy interlayer detachment

Active Publication Date: 2012-07-25
CYBRID TECHNOLOGIES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, the polyester-based polyurethane adhesive disclosed in Patent Document 2 is prone to hydrolysis and delamination during use, so it cannot withstand long-term use of more than 10 years

Method used

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  • Back protection film of solar cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] An adhesive, which is a copolyester resin prepared by the following process: put terephthalic acid, isophthalic acid, adipic acid, 2 , 2-dimethylpropanediol, ethylene glycol, and antimony trioxide as a polymerization catalyst containing 0.04 mol% of all acid components, and carried out esterification reaction for 4 hours while raising the temperature from 160°C to 240°C. Subsequently, the pressure in the boiler was gradually reduced to 650 Pa after 1 hour. The pressure was reduced to 40 Pa while raising the temperature to 265° C., and a polymerization reaction was implemented for 3 hours while maintaining 265° C. and 40 Pa or less. The properties of the copolyester resin thus obtained are shown in Table 1.

Embodiment 2～5 and comparative example 1

[0040] The copolyester resins provided in Examples 2-5 and Comparative Example 1 were prepared by the same method as Example 1, except that the raw materials and usage amounts of the esterification reaction were different. See Table 1 for details.

[0041] Table 1

[0042] Example 1 Example 2 Example 3 Example 4 Example 5 Comparative example 1 Acid Composition TPA IPA AA SA DA TMA 30 30 40 42 58 37 18 45 50 25 25 41 57 2 20 20 60 Diol composition 2-MPD 2,2-DMPD 1,5-PD 1,6-HD EG DEG 45 55 20 80 31 69 25 75 11 89 50 50 intrinsic viscosity 0.57 0.50 0.54 0.53 0.55 0.59 Specific gravity (g 1.23 1.22 1.19 1.18 1.21 1.15

[0043] In Table 1, TPA: terephthalic acid; IPA: isophthalic acid; AA: adipic acid; SA: sebacic acid; DA: 1,10-methenyl dicarboxylic acid; TMA: trimellitic anhydride; MPD: 2-methyl-1,3-propanediol...

Embodiment 6

[0045] This embodiment provides a method for making a solar cell protective film, which is as follows: 18g of copolyester resin is dissolved in 27g of ethyl acetate, and then 1.8g of crosslinking agent TPA-100 (a trifunctional product manufactured by Asahi Kasei Chemical Co., Ltd.) is added. isocyanate compounds). A commercially available 250 μm polyethylene terephthalate film (Oriental #6021) and 30 μm polyvinylidene fluoride film (Arkema #302) with corona treatment on both sides is usually required. First, the prepared solution of the above-mentioned copolyester resin was applied to one side of a polyethylene terephthalate film, and then dried at 90° C. for 10 minutes. The thickness of the coating layer after drying was 17 μm. Next, compound the coated side of the solution to the above-mentioned polyvinylidene fluoride film, at 80°C, 2.5kg / cm 2 After heating and pressing for 3 minutes in the state of , heating at 80° C. for 3 hours and performing a crosslinking reaction. ...

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Abstract

The invention relates to a polyester resin adhesive. A polyester resin is formed by a polycondensation of polycarboxylic acid and a polyalcohol as a copolyester, wherein the polycarboxylic acid comprises 50 to 90 mol percent of aromatic dicarboxylic acid; the polyalcohol at least comprises 25 to 90 percent of C3 to C20 alkylene glycol; the specific gravity of the polyester resin is 1.15 to 1.30 g / cm<3>; and the intrinsic viscosity of the polyester resin is 0.2 to 1.2. 100 weight parts of the polyester resin and 5 to 30 weight part of a crosslinker undergo a cross-linking reaction to form an adhesive material of which the gel content is over 30 percent. The adhesive is used for making a back protection film of a solar cell module and makes the solar cell products stand outdoor long-term use tests.

Description

technical field [0001] The invention belongs to the field of adhesives and solar battery back protection films, in particular to a polyester resin adhesive and its application in preparing solar battery back protection films. Background technique [0002] In recent years, due to the two major reasons of the global environmental problems and the depletion of petrochemical energy, solar cells have attracted much attention as a renewable clean energy. One or several semiconductors that can directly convert the energy of sunlight into electrical energy can form a solar cell unit. Several or even dozens of the above-mentioned solar cell units are connected in series or in parallel with wires and then sealed with resin, especially for protection. The solar cell units that need to work for a long time are packaged with various suitable materials to make components, namely solar cell modules. In general, the sun-irradiated surface is covered with a glass plate or a transparent plas...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J167/02C09J11/06H01L31/048B32B7/12
CPCY02E10/50
Inventor 吴小平宇野敬一唐超
Owner CYBRID TECHNOLOGIES INC
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