White packaging film for double-glazed photovoltaic module and preparation method thereof

A technology for encapsulating adhesive films and double-glass photovoltaics, applied in adhesives, film/sheet adhesives, adhesive additives, etc., can solve the problems of weak elasticity and impact strength of EVA film, power reduction of double-glass photovoltaic modules, Inability to effectively reflect sunlight and other problems, to avoid displacement and lack of glue, improve photoelectric conversion efficiency, superior toughness and elasticity

Active Publication Date: 2016-07-27
SUZHOU DUCHAMPS ADVANCED MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this adhesive film only adds reflective fillers rigidly to the EVA adhesive film for conventional photovoltaic modules. The EVA adhesive film has weak elasticity and impact strength, and it is easy to cause cell displacement and chipping during the lamination process of double-glass photovoltaic modules. glue phenomenon
As another example, the Chinese invention patent (application number 201310089491.7) discloses an EVA adhesive film for double-glass photovoltaic modules. Ethylene-octene copolymer and polyethylene resin are added to the EVA resin, which has excellent impact modulus and low Fluidity can avoid defects such as air bubbles and displacement during module lamination, but it cannot effectively reflect sunlight, resulting in a reduction in the power of double-glass photovoltaic modules

Method used

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  • White packaging film for double-glazed photovoltaic module and preparation method thereof
  • White packaging film for double-glazed photovoltaic module and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (1) Preparation of white masterbatch

[0040] In terms of parts by mass, 0.3 parts of titanium dioxide, 0.1 parts of sodium silicate and 100 parts of EVA [the mass percentage of VA content is 28%, the melt index is 25g / 10min (190°C, 2.16kg), and the DSC melting point is 70 ℃, French Arkema Company, 2825] fully mixed evenly, carried out melt extrusion, cooling, and granulation in a twin-screw extruder to obtain a white masterbatch with a mass concentration of white pigment of 0.3%;

[0041] (2) Preparation of white EVA film for double-glass photovoltaic modules

[0042] In terms of parts by mass, add 40 parts of ethylene-propylene rubber (50% ethylene content, 4520, American Dow Company) to 55 parts of EVA2825, 0.1 part of cross-linking agent dicumyl peroxide, and 0.3 parts of auxiliary cross-linking agent Triallyl isocyanate, 0.1 part of tackifier aminopropyltriethoxysilane, 0.3 part of antioxidant butylated hydroxyanisole (BHA), 5 parts of white masterbatch, 0.4 part ...

Embodiment 2

[0046] (1) Preparation of white masterbatch

[0047] In terms of parts by mass, 0.2 parts of zirconium dioxide, 0.2 parts of sodium tripolyphosphate and 100 parts of EVA [the VA weight percentage is 18%, the melting index is 2.5g / 10min (190°C, 2.16kg), and the DSC melting point is 88°C, DuPont Company of the United States, 460] fully mixed evenly, melt-extruded, cooled, and granulated in a twin-screw extruder to obtain a white masterbatch with a mass concentration of white pigment of 0.2%;

[0048] (2) Preparation of white EVA film for double-glass photovoltaic modules

[0049] In terms of parts by mass, add 36 parts of ethylene-propylene rubber (55% ethylene content, 4640 from Dow, USA) to 60 parts of EVA460, 0.2 part of cross-linking agent 1,1-di(tert-butyl peroxy) ring Hexane, 0.3 part of co-crosslinking agent triallyl cyanurate, 0.2 part of tackifier glycidylmioxypropyl trimethoxysilane, 0.3 part of antioxidant 2,6-tertiary butyl-4- Methyl phenol, 4 parts of white master...

Embodiment 3

[0053] (1) Preparation of white masterbatch

[0054] In terms of parts by mass, 0.3 parts of zinc oxide, 0.1 parts of sodium hexametaphosphate and 100 parts of EVA2825 were fully mixed and uniformly melted and extruded in a twin-screw extruder, cooled and granulated to obtain a white pigment with a mass concentration of 0.3 % of white masterbatch;

[0055] (2) Preparation of white EVA film for double-glass photovoltaic modules

[0056] In parts by mass, add 39 parts of ethylene-propylene rubber 4640 to 55 parts of EVA2825, 0.3 part of crosslinking agent 2-(2′-hydroxy-5′-methylphenyl) benzotriazole, 0.2 part of auxiliary crosslinking agent Ethylene glycol dimethacrylate, 0.1 part tackifier methacryloxypropyltrimethoxysilane, 0.3 part antioxidant bis(3,5-tertiary butyl-4-hydroxyphenyl)sulfur Ether, 6 parts of white masterbatch, 0.4 parts of anti-overflow rubber filler ultra-fine glass fiber, mix all the raw materials evenly, add them to the single-screw extruder, adjust the di...

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Abstract

The invention discloses a white packaging film for a double-glazed photovoltaic module. The white packaging film comprises, by weight, 45-65 parts of ethylene-vinyl acetate, 25-50 parts of ethylene propylene rubber, 1-7 parts of white pigment and 0.5-10 parts of aids, wherein the ethylene-vinyl acetate comprises, by weight, 14-33% of vinyl acetate and 15-55% of ethylene propylene rubber; and the ethylene propylene rubber has a density of 0.80-0.91g/cm<3> and Mooney viscosity of 20-40. The dedicated white EVA film for the double-glazed photovoltaic module has high reflection rate, tenacity, volume resistivity and impact resistance, and the double-glazed photovoltaic module made of the film does not cause starved joints, bubbles or the like.

Description

technical field [0001] The invention relates to a white encapsulating adhesive film for a double-glass photovoltaic module and a preparation method thereof. Background technique [0002] Photovoltaic modules are devices that use the photoelectric effect of materials to directly convert the light energy of sunlight into electrical energy. Solar energy is a rich and renewable energy source. In today's society, environmental problems and energy conflicts are becoming more and more serious. To develop sustainable clean energy It is an inevitable trend. Countries and governments around the world have adopted a series of measures to support the photovoltaic industry in order to ensure energy supply and reduce environmental pollution. Solar power generation has become a new type of energy supply method, and has been extensively and rapidly developed. Traditional photovoltaic modules are mainly made of transparent cover plate, sealant film, solar cells, sealant film and back sheet t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J123/08C09J123/16C09J11/04C09J7/00
CPCC08L2203/206C08L2205/025C08L2205/03C09J7/00C09J11/04C09J123/0853C09J2203/33C09J2301/408C09J2423/04C08L23/16C08L23/0853C08K13/04C08K7/14C08K2003/2241C08K3/34C08K2003/2244C08K2003/324C08K2003/2296C08K3/32C08K2003/3045
Inventor 罗吉江符书臻郭海涛
Owner SUZHOU DUCHAMPS ADVANCED MATERIALS CO LTD
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