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

Active Publication Date: 2018-03-27
HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the unmodified PE film has poor weather resistance and dimensional stability, and is prone to quality problems such as delamination, cracking and heat shrinkage. It is also difficult to meet the ultra-long service life (25 years) of PE film produced by conventional modification methods. ) and dimensional stability requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

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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Abstract

The invention discloses a high weather-resistance PE film for a solar battery backboard. The high weather-resistance PE film is prepared from inner, middle and outer layers through melting co-extrusion blowing. The inner layer has thickness 20-40% that of the composite film and is prepared from 100 parts by weight of linear low density polyethylene, 5 to 20 parts by weight of ethylene-vinyl acetate copolymer resin, 6 to 15 parts by weight of white master batch and 4 to 10 parts by weight of anti-UV anti-aging master batch. The middle layer has thickness 20-40% that of the composite film and isprepared from 100 parts by weight of linear low density polyethylene, 6 to 15 parts by weight of white master batch and 4 to 10 parts by weight of anti-UV anti-aging master batch. The outer layer hasthickness 20-40% that of the composite film and is prepared from 100 parts by weight of linear low density polyethylene, 3 to 15 parts by weight of ethylene-vinyl acetate copolymer resin, 6 to 15 parts by weight of white master batch and 4 to 10 parts by weight of anti-UV anti-aging master batch. The PE film has high weather resistance and excellent dimensional stability, can meet the requirements on the durability and stability of solar battery backboards and can prolong the service life of the solar battery.

Description

Technical field [0001] The invention relates to a high weather resistance PE film for solar battery back sheets. Background technique [0002] With the advancement of crystalline silicon solar cell photoelectric conversion technology, solar cell power generation technology with environmental protection and energy saving advantages has been widely used and promoted, which has driven the huge market demand for solar cell backsheet films. The solar cell backplane is located on the back of the solar cell module, which protects and supports the cells. The service life of solar cells is generally required to reach more than 25 years, and the backplane film, as a packaging material that directly contacts the external environment on a large area, must have excellent aging resistance (humid heat, dry heat, ultraviolet), electrical insulation, and water and oxygen barrier And dimensional stability. If the backplane film cannot withstand the harsh environment with many changes, such as de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08L23/06C08K13/06C08K9/10C08K3/22C08K5/3475C08K5/3435C08K5/134C08K5/20C08K5/526C08K5/3492C08J3/22H01L31/048H01L31/049B32B27/08B32B27/18B32B27/32
CPCB32B27/08B32B27/18B32B27/32B32B2307/416B32B2307/71B32B2307/712B32B2457/12C08J3/226C08J5/18C08J2323/08C08J2423/08C08K3/22C08K5/1345C08K5/20C08K5/3435C08K5/3475C08K9/10C08K13/06C08K2003/2241C08L23/0815C08L2203/162C08L2203/204C08L2205/025C08L2205/035C08L2207/062H01L31/0481H01L31/049C08L23/0853C08K5/526C08K5/3492C08L23/06Y02E10/50
Inventor 张宏元杨柱姜磊项奎夏奎夏萍刘振宇龚露露胡露
Owner HUBEI INST OF AEROSPACE CHEMOTECHNOLOGY
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