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White EVA packaging adhesive film and preparation method thereof

An encapsulation film, white technology, applied in the direction of adhesive, film/sheet adhesive, film/sheet without carrier, etc., can solve the problem of low reflectivity of white EVA film, affecting the appearance of components, restricting power improvement, etc. problems, to optimize the preparation steps and process parameters, improve the power generation efficiency, and improve the yield.

Inactive Publication Date: 2018-12-14
JIANGSU LUSHAN PHOTOVOLTAIC TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the power generation efficiency of photovoltaic modules is low and the cost is high. Therefore, how to improve the power generation power of modules has increasingly become the research and development direction of the photovoltaic industry. The absorption of long-wave bands can increase the power generation of cells. At present, single-glass modules can increase the module power by 0.5%-1.5%, and double-glass modules can increase the module power by 1.0%-3.0%. Therefore, this white high-inversion EVA glue Membrane becomes the favor of photovoltaic module factory
[0003] However, the reflectivity of the white EVA film is low, and the phenomenon of white overflow and wrinkling occurs during the module lamination process, which not only affects the appearance of the module, but also greatly restricts the effect of power improvement to a certain extent. Therefore, it is urgent to develop a reflective White EVA film with high yield and certain degree of latent cross-linking

Method used

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  • White EVA packaging adhesive film and preparation method thereof
  • White EVA packaging adhesive film and preparation method thereof
  • White EVA packaging adhesive film and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0041] A preparation method for a white EVA encapsulation film, comprising the following steps:

[0042] Mixing step: Weigh each raw material according to the formula ratio, and mix them evenly through the mixing tank to obtain the mixed material;

[0043] Film forming step: put the mixture into the casting machine, and make a white EVA packaging film through plasticizing extrusion, casting, traction and winding. The thickness of the white EVA packaging film is 0.1mm-1.0mm;

[0044] UV lamp irradiation steps: After the white EVA packaging film is irradiated by a 300-400nm ultraviolet lamp, a UV pretreated white EVA packaging film with a certain degree of latent crosslinking is obtained; among them, the cumulative irradiation energy is 6000mj / cm-12000mj / cm, the latent cross-linking degree is between 10-60%.

Embodiment 1

[0047] The present embodiment provides a kind of preparation method of white EVA encapsulating adhesive film, comprising:

[0048] Mixing step: Weigh 100 parts by weight of EVA resin with a melt index of 3g / 10min, a VA content of 20, and a melting point of 115°C, 15 parts of white masterbatch, and 2.0 parts of carbaperoxyacid-O,O-(1 , 1-dimethylethyl)-O-(2-ethylhexyl) ester (organic peroxide initiator), 1.5 parts of 2-hydroxy-2-methyl-1-phenyl-1-propanone (light initiator), 1.5 parts of 2-methyl-1-[4-(methylthio)phenyl]-2-(4-morpholinyl)-1-propanone (co-photoinitiator), 0.6 parts of triene Propyl isocyanurate (crosslinking aid), 0.8 parts of vinyltriethoxysilane (adhesive coupling agent), 0.6 parts of [2-hydroxy-4-(octyloxy)phenyl]phenyl Ketone (light stabilizer), 0.6 parts of 2,6-bis(1,1-dimethylethyl)-4-methylphenol (antioxidant); mix the above components uniformly through a mixing tank to obtain a mixed material;

[0049] Film forming step: put the mixture into the casti...

Embodiment 2

[0053] The present embodiment provides a kind of preparation method of white EVA encapsulating adhesive film, comprising:

[0054] Mixing steps: Weigh 100 parts by weight of EVA resin with a melt index of 10g / 10min, a VA content of 24, and a melting point of 100°C, 18 parts of white masterbatch, and 1.5 parts of tert-butyl peroxycarbonate-2-ethyl Hexyl ester (organic peroxide initiator), 1.2 parts of 2-hydroxyl-2-methylphenyl propane-1-ketone (photoinitiator), 1.2 parts of 1-hydroxycyclohexyl phenyl ketone (co-photoinitiator ), 0.8 parts of triallyl isocyanurate (cross-linking aid), 0.7 parts of ethylene triethoxysilane (adhesive coupling agent), 0.5 parts of 2-hydroxy-4-n-octyloxydi Benzophenone (light stabilizer), 0.5 part tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester (antioxidant); the above components are passed through the mixing tank Mix evenly to obtain a mixture;

[0055] Film forming step: Put the mixture into the casting machine, ...

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Abstract

The invention discloses a white EVA packaging adhesive film. The white EVA packaging adhesive film is prepared from the following raw materials in parts by weight: 100 parts of EVA resin, 15 to 25 parts of white masterbatch, 0.6 to 2.0 parts of an organic peroxide initiator, 0.1 to 1.5 parts of a photoinitiator, 0.1 to 1.5 parts of an auxiliary photoinitiator, 0.5 to 2.5 parts of a crosslinking agent, 0.3 to 0.8 part of tackifying coupling agent, 0.1 to 0.6 part of a light stabilizer and 0.1 to 0.6 part of an antioxidant. The invention also discloses a preparation method of the white EVA packaging adhesive film. Due to higher reflectivity, the white EVA packaging adhesive film disclosed by the invention improves the power generation efficiency of photovoltaic modules; meanwhile, the whiteEVA packaging adhesive film subjected to ultraviolet pretreatment has certain latent crosslinking degree, so that bleeding white and wrinkles of the white adhesive film are effectively reduced; meanwhile, the preparation method has the advantages of simplicity, safety, environment friendliness, few process flows, low cost and facilitation of industrial production.

Description

technical field [0001] The invention relates to the technical field of packaging materials for solar cell components, in particular to a white EVA packaging adhesive film for ultraviolet pretreatment type solar components and a preparation method thereof. Background technique [0002] With the continuous development of society, environmental pollution and energy shortage have become the biggest challenges faced by human beings. Using solar cells to convert clean and renewable solar energy into electrical energy is one of the most effective ways to solve these two problems. At present, the power generation efficiency of photovoltaic modules is low and the cost is high. Therefore, how to improve the power generation power of modules has increasingly become the research and development direction of the photovoltaic industry. The absorption of long-wave bands can increase the power generation of cells. At present, single-glass modules can increase the module power by 0.5%-1.5%, ...

Claims

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Application Information

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IPC IPC(8): C09J123/08C09J11/06C09J11/08C09J11/04C09J7/10C09J7/30
CPCC08K2003/2241C08L2203/206C09J7/10C09J7/30C09J11/04C09J11/06C09J11/08C09J123/0853C08L43/04C08K5/132C08K5/13C08K3/22
Inventor 汪加胜阳志荣郭森唐舫成
Owner JIANGSU LUSHAN PHOTOVOLTAIC TECH
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