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A kind of eva encapsulation adhesive film for photovoltaic

A technology for encapsulating adhesive films and photovoltaics, which is applied in photovoltaic power generation, adhesives, film/sheet adhesives, etc., and can solve the problems of decreased light transmittance of EVA encapsulating adhesive films, difficult processing of added products, poor compatibility, etc. , achieve the effect of weakening the PID phenomenon, enhancing the peeling force and maintaining stable performance

Active Publication Date: 2017-10-31
乐凯胶片股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Chinese patent document CN103756578A discloses a kind of fluorine compound-modified EVA encapsulation adhesive film and its preparation method. PID function, but the polarity of the fluorine-containing compound is quite different from that of EVA, and the addition of a large amount will make the product difficult to process
CN103897612A discloses a PID-resistant EVA encapsulation film for solar encapsulation materials. PE resin and plasticizer are added to the EVA encapsulation film, but the compatibility between PE resin and EVA is poor, which will cause the EVA encapsulation film to transmit light rate of decline

Method used

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  • A kind of eva encapsulation adhesive film for photovoltaic
  • A kind of eva encapsulation adhesive film for photovoltaic
  • A kind of eva encapsulation adhesive film for photovoltaic

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] With 3g ethylene glycol diacrylate, 20ppm (relative to the amount of functional monomer) hydroquinone, 1g MgAl(CO 3 )(OH) nH 2O, 3g tert-butyl peroxide-isopropyl carbonate and 3g trimethylolpropane trimethacrylate are added to 100g of EVA masterbatch (VA content is 28%) and mixed uniformly; Acryloyloxypropyltrimethoxysilane and 2g anti-aging agent (containing 0.8g 2,2-dihydroxy-4-methoxybenzophenone, 0.6g Lowilite-62 and Lowilite-62 with a mass ratio of 1:1 94, 0.2 g of tetrakis[methyl-β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester and 0.2 g of tris(2,4-di-tert-butylphenyl) Base) the mixture of phosphite, 0.2g nano-magnesium hydroxide are added in the above-mentioned mixture, mix homogeneously.Join the homogeneously mixed material and extrude on the melting extrusion casting machine, extrudate is through casting, cooling, traction 1. Curling process, that is, an EVA packaging film for photovoltaics with a film thickness of 0.45 mm.

Embodiment 2

[0065] 1.5 g of bis(2-methyl-2-propenoic acid) 2-hydroxy-1,3-propanediol, 600 ppm (relative to the amount of functional monomer) of hydroquinone, 0.1 g of Sb 2 o 5 2H 2 O, 1g tert-butyl peroxy-isopropyl carbonate and 0.5g trimethylolpropane trimethacrylate are added to 100g EVA masterbatch (VA content is 28%) and mixed uniformly; then 0.05g gamma-methyl Acryloxypropyltrimethoxysilane and 1g anti-aging agent (containing 0.2g 2,2'-dihydroxy-4-methoxybenzophenone, 0.2g Lowilite-62 and Lowilite-94 with a mass ratio of 1:1 mixture, 0.2 g of tetrakis[methyl-β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester and 0.1 g of tris(2,4-di-tert-butylbenzene Base) a mixture of phosphite, 0.3g of nano-magnesium hydroxide) was added to the above mixture, and mixed uniformly. Add the uniformly mixed material to a melt extrusion casting machine for extrusion, and the extruded product is cast, cooled, drawn, and curled to obtain an EVA packaging film for photovoltaics with...

Embodiment 3

[0067] 2g of bisphenol A dimethacrylate, 350ppm (relative to the amount of functional monomer) of tert-butylcatechol, 0.3g of Ti (HPO 4 ) 2 ·H 2 O, 0.1g tert-butyl peroxy-2-ethylhexyl carbonate and 0.1g trimethylolpropane trimethacrylate are added to 100g EVA masterbatch (VA content is 28%) and mixed uniformly; then 2g of γ -Methacryloxypropyltrimethoxysilane and 0.05g of anti-aging agent (containing 0.02g of 2,2'-dihydroxy-4-methoxybenzophenone, 0.01g of Lowilite-62 with a mass ratio of 1:1 And the mixture of Lowilite-94, 0.01g of three (2,4-di-tert-butylphenyl) phosphite, 0.01g of nano-magnesium hydroxide are added to the above-mentioned mixture, and mix well.The uniformly mixed material is added to Extrude on a melt extrusion casting machine, and the extruded product is cast, cooled, drawn, and curled to obtain an EVA packaging film for photovoltaics with a film thickness of 0.45mm.

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PUM

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Abstract

An EVA encapsulation film for photovoltaics, the EVA encapsulation film contains functional monomers, the end of the functional monomers contains 2-3 functional groups, and the middle segment of the functional group is connected Contains at least two C atoms. The EVA encapsulation film also contains a polymerization inhibitor, which not only protects the functional monomer during processing and maintains its stable performance, but also slows down the polymerization failure of the functional monomer during storage, effectively The stability of the functional monomer is improved, and the preservation performance of the EVA packaging film is more excellent. The invention reduces the mobility of free ions in the EVA packaging adhesive film, reduces the leakage current from the source, thereby improving the anti-PID characteristics of the photovoltaic module, improving the stability of the EVA packaging adhesive film, and the preparation method is simple and easy, Applicable to the existing production process.

Description

technical field [0001] The invention relates to an EVA packaging adhesive film for photovoltaics, in particular to a PID-resistant EVA packaging adhesive film for photovoltaics. Background technique [0002] The PID phenomenon (Potential-induced degradation), that is, potential potential-induced degradation, was first discovered in 2005. The reason for the PID phenomenon is: when the solar cell module and the ground form a high-intensity negative voltage, the long-term high voltage action causes a leakage current between the glass and the packaging material, so a large amount of charge accumulates on the surface of the cell to passivate it , damage the solar cell components and reduce their power. When the PID phenomenon is serious, the power of solar cell modules will be attenuated by more than 50%, which will directly lead to a decrease in the yield of photovoltaic power plants. However, no defects can be seen from the appearance of the components alone. [0003] The da...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J7/00C09J4/02C09J4/06C09J11/06C09J11/04H01L31/048H01L31/049
CPCY02E10/50
Inventor 孟丹范云峰郑凯徐晓龙樊仔欣
Owner 乐凯胶片股份有限公司