High weather-resistance PE film for solar battery backboard
A technology of solar cells and high weather resistance, applied in applications, circuits, electrical components, etc., can solve problems such as difficulty in meeting the requirements of ultra-long service life dimensional stability, poor weather resistance and dimensional stability of PE film, and thermal shrinkage, etc., to achieve improved Dimensional stability, improvement of flexibility, and effect of reducing crystallinity
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Embodiment 1
[0040] The inner layer, middle layer and outer layer are melted and co-extrusion blown to obtain a composite film, which is composed of the following raw materials by weight:
[0041] The inner layer accounts for 25% of the thickness of the composite film:
[0042] LLDPE 100 copies
[0043] EVA 15 parts
[0044] White masterbatch 13 parts
[0045] Anti-UV and anti-aging masterbatch 9 parts
[0046] The middle layer accounts for 40% of the thickness of the composite film:
[0047] HDPE 100 copies
[0048] White masterbatch 13 parts
[0049] Anti-UV and anti-aging masterbatch 10 parts
[0050] The outer layer accounts for 35% of the thickness of the composite film:
[0051] LLDPE 100 copies
[0052] EVA 15 parts
[0053] White masterbatch 13 parts
[0054] Anti-UV and anti-aging masterbatch 9 parts
[0055] Among them, the melt flow rate of ethylene-vinyl acetate copolymer resin (EVA) is 1.5g / 10min, the VA content in the inner EVA is 14%, and the VA content in the outer EVA is 18%.
[0056] The whit...
Embodiment 2
[0061] The inner layer, middle layer and outer layer are melted and co-extrusion blown to obtain a composite film, which is composed of the following raw materials by weight:
[0062] The inner layer accounts for 20% of the thickness of the composite film:
[0063] LLDPE 100 copies
[0064] EVA 12 copies
[0065] White masterbatch 12 parts
[0066] Anti-UV and anti-aging masterbatch 7 parts
[0067] The middle layer accounts for 40% of the thickness of the composite film:
[0068] HDPE 100 copies
[0069] 15 copies of white masterbatch
[0070] Anti-UV and anti-aging masterbatch 9 parts
[0071] The outer layer accounts for 40% of the thickness of the composite film:
[0072] LLDPE 100 copies
[0073] EVA 15 parts
[0074] White masterbatch 12 parts
[0075] Anti-UV and anti-aging masterbatch 7 parts
[0076] Among them, the melt flow rate of ethylene-vinyl acetate copolymer resin (EVA) is 2.0g / 10min, the VA content in the inner EVA is 5%, and the VA content in the outer EVA is 18%.
[0077] The w...
Embodiment 3
[0082] The inner layer, middle layer and outer layer are melted and co-extrusion blown to obtain a composite film, which is composed of the following raw materials by weight:
[0083] The inner layer accounts for 35% of the thickness of the composite film:
[0084] LLDPE 100 copies
[0085] EVA 5 copies
[0086] White masterbatch 6 parts
[0087] Anti-UV and anti-aging masterbatch 10 parts
[0088] The middle layer accounts for 30% of the thickness of the composite film:
[0089] HDPE 100 copies
[0090] 15 copies of white masterbatch
[0091] Anti-UV and anti-aging masterbatch 10 parts
[0092] The outer layer accounts for 35% of the thickness of the composite film:
[0093] LLDPE 100 copies
[0094] EVA 3 copies
[0095] 10 copies of white masterbatch
[0096] Anti-UV and anti-aging masterbatch 4 parts
[0097] Among them, the melt flow rate of ethylene-vinyl acetate copolymer resin (EVA) is 3.5g / 10min, the VA content in the inner EVA is 5%, and the VA content in the outer EVA is 24%.
[0098] T...
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