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EVA (ethylene vinyl acetate) adhesive film for solar cells

A solar cell and film technology, applied in circuits, adhesives, photovoltaic power generation, etc., to achieve the effects of excellent moisture and heat aging resistance, good durability, and high transparency

Inactive Publication Date: 2014-02-05
NINGBO HUAFENG PACKAGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the enhancement of independent research and development and production capacity, domestic products are gradually revealed, such as Duchen New Materials of the Institute of Chemistry, Chinese Academy of Sciences, FIRST (Foster) of Zhejiang Institute of Chemical Technology, and Hangzhou Suo Kangbo, etc., but the curing speed of EVA film , Compatibility with EVA base resin, yellowing resistance and other aspects need to be further improved

Method used

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  • EVA (ethylene vinyl acetate) adhesive film for solar cells
  • EVA (ethylene vinyl acetate) adhesive film for solar cells
  • EVA (ethylene vinyl acetate) adhesive film for solar cells

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] In terms of parts by mass, the following raw materials were weighed:

[0051] VA content is 34%, 100 parts of EVA pellets (ethylene-vinyl acetate copolymer) whose melt index value is 50g / 10min

[0052] Silane coupling 3-aminopropylmethyldiethoxysilane 0.01 parts by weight

[0053] 1.5 parts of cross-linking curing agent tert-butyl peroxide 2-ethylhexyl carbonate

[0054] 0.15 parts of cross-linking curing accelerator magnesium oxide

[0055] Heat stabilizer calcium-zinc composite liquid stabilizer 2 parts by weight

[0056] 0.2 parts of the tackifier r-glycidyl ether oxypropyltrimethoxysilane

[0057] 0.7 parts of the antioxidant β-(4-hydroxyl-3,5-di-tert-butylphenyl) n-octadecyl propionate

[0058] 0.01 parts of said hindered amine light stabilizer polysuccinate (4-hydroxyl-2,2,6,6-tetramethyl-1-piperidine ethanol) ester

[0059] 0.03 parts each of the ultraviolet absorber nano-scale titanium dioxide and 2-hydroxyl-4-n-dodecyloxybenzophenone

[0060] Prepare EVA ...

Embodiment 2

[0066] VA content is 37%, 100 parts of EVA pellets (ethylene-vinyl acetate copolymer) whose melt index value is 50g / 10min

[0067] Silane coupling agent 3-aminopropyltrimethoxysilane 2 parts by weight

[0068] Cross-linking curing agent 2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane and 1,1-(diperoxy-tert-butyl)3,3,5-trimethylcyclohexane Alkanes each 1.0 parts

[0069] 0.25 parts of cross-linking curing accelerator triallyl isocyanurate

[0070] Thermal stabilizer barium-zinc composite liquid stabilizer 5 parts by weight

[0071] 0.6 parts of said tackifier vinyltrimethylsilane

[0072] One or two of each of 0.3 parts in the antioxidant distearyl pentaerythritol diphosphite and tris (nonylphenyl) phosphite

[0073] 0.1 parts of the hindered amine light stabilizer bis(1-octyloxy-2,2,6,6-tetramethyl-4-piperidinyl)decanediester

[0074] 0.04 parts each of the ultraviolet absorber nano-level aluminum oxide and 2-(2'-hydroxyl-3', 5'-di-tert-phenyl)-5-chlorinated benzotriazole

...

Embodiment 3

[0077] 100 parts of EVA pellets (copolymer of ethylene-vinyl acetate) with a melt index value of 50 g / 10 min at a VA content of 35 percent

[0078] Silane coupling agent N-(2-aminoethyl)-3-aminopropylmethyldimethoxysilane 1 part by weight

[0079] 2.0 parts of crosslinking curing agent 1,1-(diperoxy-tert-butyl) 3,3,5-trimethylcyclohexane

[0080] 0.25 parts of cross-linking curing accelerator triallyl cyanurate

[0081] 5 parts by weight of heat stabilizer rare earth liquid stabilizer

[0082] 0.4 parts of the tackifier γ-aminopropyltriethoxysilane

[0083] 0.4 parts of the antioxidant two (2,4-dicumylphenyl) pentaerythritol diphosphite

[0084] 0.05 parts of the hindered amine light stabilizer bis(1-octyloxy-2,2,6,6-tetramethyl-4-piperidyl)decanediester

[0085] 0.05 parts of the ultraviolet absorber 2-hydroxyl-4-n-octyloxybenzophenone

[0086] Prepared according to the method of Example 1, the extrusion temperature is controlled at 86° C., and the cross-linked EVA film ...

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Abstract

The invention relates to an EVA (ethylene vinyl acetate) adhesive film for solar cells, which comprise ethylene vinyl acetate copolymer, silane coupling agent, cross-linked curing agent, cross-linking curing accelerator, thermal stabilizer, tackifier, antioxidant, ultraviolet absorbent, and hindered amine light stabilizer. Compared with the prior art and similar products, the EVA adhesive film for solar cells has great competition potential in terms of various indexes such as production formula, production process, properties and the like. A novel formula is used to prolong service life of the EVA adhesive film firstly, quick curing performance of the EVA adhesive film is improved so that production efficiency of cell package is benefited, using novel solvent to dissolve aids solves the quality problem caused by uneven mixing of the aids and particles in production, and by using the produced low-contraction-ratio EVA adhesive film, possibility of cell breakage in cell packaging can be lowered.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a solar cell EVA adhesive film. Background technique [0002] In order to solve the energy crisis, solar energy will become the main way of energy production in the world in the future, and solar cells are one of the most commonly used ways to utilize solar energy. The principle of solar power generation is to use the quantum effect of the silicon wafer to directly convert the visible light of the sun into electrical energy. In order to protect the photoelectric conversion capability of the silicon wafer, a transparent, light-resistant aging, good adhesion, and good weather resistance are generally used. The silicon wafer group is encapsulated, and bonded together with the upper protective material and the lower TPT (polyvinyl fluoride composite film) protective material to form a solar panel. [0003] EVA (ethylene-vinyl acetate copolymer) film is a commonly used film...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J7/00C09J123/08C09J11/06C09J11/04H01L31/048B29C47/92B29C48/92
CPCY02E10/50B29C48/911B29C48/08B29C48/91B29C48/92B29C2948/92704B29C2948/92895
Inventor 陈亦锋鲁听徐建立
Owner NINGBO HUAFENG PACKAGE
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