EVA adhesive film for encapsulating solar cell and preparing process of EVA adhesive film

A technology of solar cells and adhesive films, applied in circuits, adhesives, photovoltaic power generation, etc., can solve problems such as accelerating PID, and achieve the effect of improving anti-PID performance and excellent water vapor barrier performance

Active Publication Date: 2015-08-26
KUNSHAN TIANYANG HOT MELT ADHESIVE CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above inventions basically modify the EVA packaging film for volume resistivity and water vapor transmission rate, and have achieved relatively good results in anti-PID, but they have not changed the small amount of free acetic acid contained in EVA itself or aging. A small amount of acidic small molecules degraded in the process are processed, and a small amount of acidic small molecules may accelerate the PID phenomenon under humid and hot conditions. Therefore, how to effectively eliminate or neutralize a small amount of acidic substances in the EVA film can make the film have excellent properties. Water vapor barrier performance, thus improving the PID phenomenon of components has become a problem to be solved

Method used

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  • EVA adhesive film for encapsulating solar cell and preparing process of EVA adhesive film

Examples

Experimental program
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Embodiment 1

[0029] An EVA adhesive film for solar cell encapsulation, its raw materials are: photovoltaic grade EVA particles (among them, VA content 25%, melt index 20g / 10min / 190℃) 100kg, crosslinking agent 2,5-dimethyl-2 , 5-di(tert-butyl peroxide) hexane 0.5kg, cross-linking aid triallyl isocyanurate 1kg, antioxidant β-(3,5-di-tert-butyl-4-hydroxy 0.05kg of n-octadecanyl phenyl) propionate, 0.01kg of ultraviolet light absorber 2-hydroxy-4-n-octyloxybenzophenone, light stabilizer sebacic acid bis-2,2,6,6 - 0.2 kg of tetramethylpiperidinol ester, 0.1 kg of vinyltrimethoxysilane as tackifier, and 0.05 kg of nano-sized polyacrylamide powder.

[0030] The preparation process of the above-mentioned EVA adhesive film for solar cell encapsulation, the steps are: firstly add the above-mentioned raw materials into the mixer and mix them uniformly; Winding and other steps to obtain the EVA film for solar cell encapsulation.

[0031] The product obtained in Example 1 is marked as S1.

Embodiment 2

[0033] An EVA adhesive film for solar cell encapsulation, its raw materials are: photovoltaic grade EVA particles (among them, VA content 26%, melt index 23g / 10min / 190℃) 100kg, crosslinking agent peroxide-2-ethylhexyl carbonate tert-butyl ester 1kg, crosslinking agent trimethylolpropane trimethacrylate 0.3kg, antioxidant tris(nonylphenyl) phosphite 0.5kg, ultraviolet light absorber 2-(3,5- Di-tert-amyl-2-hydroxyphenyl) benzotriazole 0.3kg, light stabilizer bis(1,2,2,6,6-pentamethyl-4-piperidinyl) sebacate 0.01kg, 0.3 kg of tackifier vinyl triethoxysilane, 0.1 kg of nano-sized polyacrylamide powder.

[0034] The preparation process of the above-mentioned EVA adhesive film for solar cell encapsulation, the steps are: firstly add the above-mentioned raw materials into the mixer and mix them uniformly; Winding and other steps to obtain the EVA film for solar cell encapsulation.

[0035] The product obtained in Example 2 is marked as S2.

Embodiment 3

[0037] An EVA adhesive film for solar cell encapsulation, its raw materials are: photovoltaic grade EVA particles (among them, VA content 28%, melting index 25g / 10min / 190℃) 100kg, crosslinking agent peroxide-2-ethylhexyl carbonate 1.5 kg of tert-butyl ester, 1.5 kg of triallyl cyanurate, 0.3 kg of antioxidant tris(nonylphenyl) phosphite, 2-(2'-hydroxyl-5 '-tert-octylphenyl) benzotriazole 0.2kg, polymer of succinic acid and 4-hydroxy-2,2,6,6-tetramethyl-1-piperidinol 0.1kg, tackifier 3 - 0.5 kg of glycidyl etheroxypropyl trimethoxysilane, 0.5 kg of nano-sized polyacrylamide particles.

[0038] The preparation process of the above-mentioned EVA adhesive film for solar cell encapsulation, the steps are: firstly add the above-mentioned raw materials into the mixer and mix them uniformly; Winding and other steps to obtain the EVA film for solar cell encapsulation.

[0039] The product obtained in Example 3 is marked as S3.

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Abstract

The invention discloses an EVA adhesive film for encapsulating a solar cell and a preparing process thereof. The EVA adhesive film is mainly characterized in that polyacrylamide is added into raw material components, the polyacrylamide is used as an acid-absorbing water repellent, and a small quantity of free acetic acid in EVA and acid micromolecular substances generated in the ageing process are effectively eliminated or neutralized, so that the encapsulating adhesive film has excellent vapor blocking performance. As the adopted polyacrylamide is nanoscale granules or powder and does not influence the light transmittance of the adhesive film basically, the PID resistance of the assembly is effectively improved.

Description

technical field [0001] The invention relates to an EVA adhesive film for solar cell encapsulation and a preparation process thereof, in particular to an EVA encapsulation adhesive film for reducing the PID phenomenon of photovoltaic modules and a preparation process thereof. Background technique [0002] With people's emphasis on environmental protection and renewable energy, solar power has developed rapidly as a new type of energy. EVA packaging film has become the main packaging material for solar cells due to its excellent light transmittance, bonding performance, and processing performance. [0003] In recent years, the potential-induced power degradation (PID) of solar cells has attracted more and more attention. According to relevant research results, it is believed that there are many possible reasons for the PID phenomenon of components, such as the grounding method of the photovoltaic inverter array, the system, components, and cells, which may affect the PID phen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/00C09J123/08C09J11/08C09J11/06H01L31/048
CPCY02E10/50
Inventor 李哲龙朱万育宣中旺曾作祥
Owner KUNSHAN TIANYANG HOT MELT ADHESIVE CO LTD
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