eva/pc composite adhesive film for low shrinkage solar cell encapsulation

A technology of solar cells and adhesive films, which is applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problems of reducing EVA packaging adhesive films, reducing production efficiency, and backplane deformation, achieving good physical and mechanical properties, improving product quality, The effect of improving productivity

Inactive Publication Date: 2011-12-14
NINGBO HUAFENG PACKAGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The shrinkage rate of the EVA film is an indicator that needs to be strictly controlled, because when the shrinkage rate is large, the shrinkage stress will easily deform the backplane and even crack the glass panel, resulting in the scrapping of the component
Although the shrinkage rate of the EVA packaging film can be reduced by adjusting the formula of the EVA film, improving

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] In terms of parts by mass, 1.5 parts of β-(3,5 di-tert-butyl-4-hydroxyphenyl) n-octadecyl propionate are used as antioxidant, 0.3 parts of UV stabilizer bis(2,2 , 6,6-tetramethyl-4-piperidinyl) sebacate, 0.4 parts of coupling agent γ-aminopropyltriethoxysilane, and 1.3 parts of 2,5-dimethyl-2,5 - Bis(tert-butyl peroxy) hexane is mixed evenly, and then mixed with 100 parts of EVA resin and 5 parts of EAA resin, blended and extruded with an extruder, and the temperature is controlled at 100 ° C. Extending, cooling, pulling, and coiling processes to obtain an EVA film with a thickness of 0.1 mm.

[0028] In terms of parts by mass, 0.125 parts of β-(3,5 di-tert-butyl-4-hydroxyphenyl) n-octadecyl propionate and 0.125 parts of tris(mononylbenzene and dinonylbenzene) of phosphite Mixed ester) as an antioxidant, mixed with 0.3 parts of UV stabilizer bis(1,2,2,6,6-pentamethyl-4-piperidinyl) sebacate, and then mixed with 100 parts of PC resin After mixing evenly, use an extrude...

Embodiment 2

[0031] In terms of parts by mass, 0.1 part of β-(3,5 di-tert-butyl-4-hydroxyphenyl) n-octadecyl propionate and 0.2 part of tris(mono-nonylbenzene and dinonylbenzene) of phosphite Mixed ester) as antioxidant, 0.3 part of UV stabilizer bis(1,2,2,6,6-pentamethyl-4-piperidinyl) sebacate, 0.4 part of coupling agent γ-methyl Acryloyloxyethyl trimethoxysilane, and 1.3 parts of 1,1-(diperoxy tert-butyl) 3,3,5-trimethylcyclohexane are mixed evenly, and then mixed with 100 parts of EVA resin and 5 parts of EAA After the resin is mixed evenly, it is blended and extruded with an extruder, and the temperature is controlled at 100 ° C. After the extruded product is cast, cooled, drawn, and coiled, an EVA film with a thickness of 0.2 mm is obtained.

[0032] In terms of parts by mass, 0.2 parts of tris(2,4-di-tert-butylphenyl)phosphite and 0.1 part of β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid n-octadecanoate Carbon alcohol ester as antioxidant, and 0.3 parts of UV light stabilizer...

Embodiment 3

[0035] In terms of parts by mass, 0.25 parts of tetrakis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid]pentapentyl alcohol ester and 0.2 parts of tris(2,4-di-tert-butylbenzene base) phosphite as an antioxidant, 0.3 parts of UV light stabilizer tris(1,2,2,6,6-pentamethylpiperidinate), 0.4 parts of coupling agent γ-glycidyl ether oxypropyl Base trimethoxysilane, and 0.5 parts of peroxide tert-butyl peroxycarbonate-2-ethylhexyl ester are mixed evenly, and then mixed with 100 parts of EVA resin and 5 parts of EMA resin, and blended and extruded with an extruder The temperature is controlled at 100°C, and the extruded product is cast, cooled, drawn, and coiled to obtain an EVA film with a thickness of 0.3 mm.

[0036] In terms of parts by mass, 0.02 parts of β-(3,5 di-tert-butyl-4-hydroxyphenyl) n-octadecanyl propionate are used as an antioxidant, and 0.3 parts of ultraviolet light stabilizer bis(2, 2,6,6-Tetramethyl-4-piperidinyl) sebacate was mixed evenly, and then mixed w...

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Abstract

The invention discloses an EVA/PC composite adhesive film for encapsulating solar cells with a low shrinkage rate, which is sequentially composed of an upper layer of EVA film, a core layer of PC film and a lower layer of EVA film. Due to the high melting point, high strength and modulus of the core PC film, the composite EVA/PC film not only has better physical and mechanical properties than ordinary EVA film, but also has a shrinkage rate reduced to less than 0.5%, which is much lower than At present, the shrinkage rate of the EVA adhesive film is 3%, and its transparency and aging resistance fully meet the requirements of the solar cell packaging adhesive film. The layered composite EVA/PC adhesive film of the invention can improve the production efficiency of solar cells, improve product quality, reduce defective rate and cost.

Description

technical field [0001] The invention belongs to the field of solar cell packaging adhesive films, in particular to an EVA / PC composite adhesive film with low shrinkage rate for solar cell packaging. Background technique [0002] Solar cells usually use two layers of polymer film to encapsulate the silicon wafer between the glass or polycarbonate panel and the backplane. The function of the encapsulation film is to fix the silicon wafer, isolate air and water vapor, and maintain a good light transmittance, so as to ensure that the encapsulated solar cell has a good photoelectric conversion rate and a long service life. In order to ensure that solar cells do not have yellowing, cracking, delamination and other problems during long-term use, the encapsulation film must have good resistance to damp heat aging and light aging, and have sufficient adhesion to the panel and backplane . Common solar cell encapsulation films include ethylene-vinyl acetate copolymer (EVA), ethylene-...

Claims

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Application Information

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IPC IPC(8): B32B27/08B32B27/18B32B27/28H01L31/048
CPCY02E10/50
Inventor 陈亦锋彭懋郭宏磊
Owner NINGBO HUAFENG PACKAGE
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