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Packaging adhesive film for solar cell

A solar cell and encapsulation film technology, which is applied to circuits, photovoltaic power generation, electrical components, etc., can solve the problems of low production line speed, low bonding strength and durability, EVA film processing, and packaging performance of solar cell encapsulation films. It is difficult to reconcile problems with production efficiency, etc., to achieve the effects of increased bonding strength, improved processing performance, and prolonged scorch time

Inactive Publication Date: 2011-08-31
南京红宝丽新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] This is a pair of contradictions. Due to the existence of this problem, the speed of the current production line for manufacturing solar cell packaging film is relatively low.
[0011] Therefore, the processing, encapsulation performance and production efficiency of EVA film have formed a contradiction that is difficult to reconcile. At present, no effective means has been found, which can not only ensure the production efficiency of solar cell encapsulation, but also effectively improve the processing and encapsulation performance of EVA film.
[0012] In addition, the protective layer materials in solar cells are generally glass and TPT film, glass is an inorganic material with a smooth surface, and TPT is a polymer difficult to stick material, which makes the bonding strength and durability between the EVA film and the protective layer inferior. high

Method used

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  • Packaging adhesive film for solar cell
  • Packaging adhesive film for solar cell
  • Packaging adhesive film for solar cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] In terms of parts by mass, 100 parts of VA content is 30% EVA pellets, 1.1 parts of 2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane, 0.25 parts of 2,4- Dihydroxybenzophenone, 0.25 parts tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester, 0.2 parts bis(2,2,6,6-tetramethyl -4-piperidinyl) sebacate, 0.3 parts of γ-(2,3-epoxypropoxy)propyltrimethoxysilane, 0.3 parts of cyclopentadiene polymer, 0.1 parts of 1,1-diphenyl Base-2-trinitrophenylhydrazine was mixed uniformly at 80°C to prepare an EVA solar cell encapsulation film.

Embodiment 2

[0054] In terms of parts by mass, 100 parts of VA content is 30% EVA pellets, 1.1 parts of 2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane, 0.25 parts of 2,4- Dihydroxybenzophenone, 0.25 parts tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester, 0.2 parts bis(2,2,6,6-tetramethyl -4-piperidinyl) sebacate, 0.3 parts of γ-(2,3-epoxypropoxy)propyltrimethoxysilane, 0.2 parts of butadiene polymer, 0.2 parts of 1,1-diphenyl -2-Trinitrophenylhydrazine was mixed uniformly at 80° C. to prepare an EVA solar cell encapsulation film.

Embodiment 3

[0056] In terms of parts by mass, 100 parts of VA content is 30% EVA pellets, 1.1 parts of 1,1-(diperoxy tert-butyl)-3,3,5-trimethylcyclohexane, 0.25 parts of 2 , 4-dihydroxybenzophenone, 0.25 parts of β-(4-hydroxyphenyl-3,5-di-tert-butylphenyl) n-octadecyl propionate, 0.2 parts of bis(1-octyloxy- 2,2,6,6-Tetramethyl-4-piperidinyl)decanediester, 0.3 parts of γ-(2,3-epoxypropoxy)propyltrimethoxysilane, 0.4 parts of polyethylene wax, 0.05 Parts of 3,4-dihydroxybenzaldehyde were uniformly mixed at 80° C. to prepare an EVA solar cell encapsulation film.

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Abstract

The invention relates to a packaging adhesive film for a solar cell, which can effectively prolong scorch time T2 and improve the processing and packaging properties of an EVA adhesive film on the basis of small change on total cross-linking time TC. The packaging adhesive film for the solar cell contains a copolymer of ethylene-vinyl acetate (EVA), a cross-linking agent, a cross-linking inhibitor and a radical trap, wherein, the masses of the cross-linking inhibitor and the radical trap are respectively 0.1-1.0% and 0-0.3% of the mass of the ethylene-vinyl acetate copolymer, and the cross-linking time of the packaging adhesive film for the solar cell is 10-30min. In the invention, the cross-linking inhibitor and the radical trap are added based on the formula of the existing packaging adhesive film for the solar cell to form a stable molecular structure with active radicals generated in the peroxide cross-linking agent, thus effectively preventing early-stage cross-linking and over cross-linking, and effectively prolonging the scorch time T2 on the basis of guaranteeing the total cross-linking time TC to meet the requirements.

Description

technical field [0001] The invention relates to a solar cell encapsulating adhesive film, in particular to a solar cell heat-sealing adhesive film with ethylene-vinyl acetate copolymer as the main raw material. Background technique [0002] Stack tempered glass 1, encapsulation film 2, battery sheet 3, encapsulation film 2, and TPT backplane 4 in sequence, and vacuum laminate them with a laminator at 130°C to 170°C for 15min to 30min to cure and form. Made of thin film solar cells. The structure of the solar cell module encapsulated by the solar cell encapsulation film is as follows: figure 1 shown. [0003] The solar cell encapsulation adhesive film is made of EVA as the main raw material, combined with functional additives such as peroxide crosslinking agent, auxiliary crosslinking agent, coupling agent, antioxidant, ultraviolet stabilizer, etc., after melt kneading, tape casting It is processed by processes such as sheeting, trimming and winding. The main raw material...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/0203H01L31/0216H01L31/048
CPCY02E10/50
Inventor 祝元龙周徐韦华
Owner 南京红宝丽新材料有限公司
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