A kind of white encapsulation film for double-glass photovoltaic modules 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
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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, American Dow Company) to 60 parts of EVA 460, and 0.2 parts of crosslinking agent 1,1-bis(tert-butyl peroxide) Cyclohexane, 0.3 part cross-linking agent triallyl cyanurate, 0.2 part tackifier glycidylmioxypropyl trimethoxysilane, 0.3 part antioxidant 2,6-tertiary butyl-4 -Methyl phenol, 4 parts of white m...
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 EVA 2825 were fully mixed, melted and extruded, cooled and granulated in a twin-screw extruder to obtain a white pigment with a mass concentration of 0.3% white masterbatch;
[0055] (2) Preparation of white EVA film for double-glass photovoltaic modules
[0056] In terms of parts by mass, add 39 parts of ethylene-propylene rubber 4640 to 55 parts of EVA 2825, 0.3 part of crosslinking agent 2-(2′-hydroxy-5′-methylphenyl) benzotriazole, 0.2 part of crosslinking aid Agent diethylene glycol methacrylate, 0.1 part tackifier methacryloxypropyl trimethoxysilane, 0.3 part antioxidant bis(3,5-tertiary butyl-4-hydroxyphenyl) Sulfide, 6 parts of white masterbatch, 0.4 part of anti-overflow rubber filler superfine glass fiber, mix all the raw materials evenly, add them to the single-screw extruder, adjust the die head, melt extr...
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