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EVA (Ethylene Viny Acetate) hot melt adhesive packaging material and preparation method thereof

A packaging material, hot melt adhesive technology, applied in the direction of adhesives, monocarboxylate copolymer adhesives, adhesive types, etc., can solve the problem of large difference in thermal expansion coefficient, small thermal conductivity coefficient and high heat transfer efficiency of solar cells problem, to achieve the effect of improving photoelectric conversion efficiency, high heat transfer efficiency, and large heat transfer coefficient

Inactive Publication Date: 2013-03-27
TIANWEI NEW ENERGY HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the existing EVA as a solar energy packaging material has a small thermal conductivity coefficient and a large difference with the thermal expansion coefficient of the battery sheet, and provides a kind of EVA hot melt adhesive packaging material, which has a low expansion coefficient and high heat transfer efficiency The advantages, and then make the solar cell packaged by the present invention can transfer heat as soon as possible, and can avoid cracking of the cell

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] In this embodiment, the specific raw materials for configuring the EVA hot-melt adhesive packaging material are: ethylene-vinyl acetate copolymer, the inorganic heat-conducting material is silicon dioxide micropowder, the coupling agent is aminopropyltrimethoxysilane, and the crosslinking agent is hyperthermia. The oxidized dicumyl benzene, the ultraviolet absorber is resorcinol monobenzoate, and the antioxidant is 6,6-di-tert-butyl-2,2'-thio-p-cresol. Wherein, the mass percentage of ethylene-vinyl acetate copolymer and silica micropowder treated by coupling agent surface is 100%, the mass percentage of ethylene-vinyl acetate copolymer in this embodiment is 80%, after surface treatment The mass fraction of silica powder is 20%.

[0028] The specific process for preparing the EVA hot-melt adhesive packaging material in this example is as follows: weigh 1 kg of silicon dioxide micropowder, and measure 3 g of aminopropyltrimethoxysilane. First dilute aminopropyltrimethoxy...

Embodiment 2

[0030] In this embodiment, the specific raw materials for configuring the EVA hot-melt adhesive packaging material are: ethylene-vinyl acetate copolymer, the inorganic heat-conducting material is alumina micropowder, the coupling agent is isopropyl triisostearyl titanate, and the crosslinking agent It is tert-butyl peroxy isopropyl carbonate, the UV absorber is 2-(2'-hydroxy-5'-tert-octylphenyl) benzotriazole, and the antioxidant is thiodipropionic acid laurate . Wherein, the mass percentage of ethylene-vinyl acetate copolymer and alumina micropowder treated by coupling agent surface is 100%, the mass percentage of ethylene-vinyl acetate copolymer in this embodiment is 60%, and the surface-treated The mass fraction of alumina micropowder is 40%.

[0031]The specific process for preparing the EVA hot-melt adhesive packaging material in this example is as follows: weigh 2 kg of alumina micropowder, and measure 4 g of isopropyl triisostearyl titanate. First dilute isopropyl tri...

Embodiment 3

[0033] In this embodiment, the specific raw materials for configuring the EVA hot-melt adhesive packaging material are: ethylene-vinyl acetate copolymer, the inorganic heat-conducting material is a mixture of boron nitride micropowder and silicon dioxide micropowder, and the coupling agent is mercaptan triethoxy base silane, cross-linking agent is tert-butyl peroxy isopropyl carbonate, UV absorber is resorcinol monobenzoate, antioxidant is bis[2-methyl-4,6-bis( 1,1-Dimethylethyl)phenol]ethyl phosphate. Wherein, the quality of the mixture of ethylene-vinyl acetate copolymer, boron nitride micropowder and silicon dioxide micropowder treated on the surface of the coupling agent and in 100%, the mass percentage of ethylene-vinyl acetate copolymer in the present embodiment The mass fraction of the mixture of surface-treated boron nitride fine powder and silicon dioxide fine powder is 40%.

[0034] The specific process of preparing the EVA hot melt adhesive packaging material in th...

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Abstract

The invention discloses an EVA (Ethylene Viny Acetate) hot melt adhesive packaging material, which is prepared from ethylene-vinyl acetate copolymer, inorganic heat conductive material treated by coupling reagent, cross-linking agent and antioxygen, the sum of the quality of ethylene-vinyl acetate copolymer and inorganic heat conductive material treated by coupling reagent is 100%, wherein the mass percent of the ethylene-vinyl acetate copolymer is 40-80%, and the mass percent of the inorganic heat conductive material treated by coupling reagent is 20-60%; the quality of the cross-linking agent is 0.1-1.5% that of the ethylene-vinyl acetate copolymer, and the quality of the antioxygen is 0.1-1% that of the ethylene-vinyl acetate copolymer. The invention also discloses a preparation method for the EVA hot melt adhesive packaging material. When the EVA hot melt adhesive packaging material is adopted as a solar energy battery packaging material, the subfissure probability of a battery piece is lowered, and the photoelectric converting efficiency of the solar energy battery can be improved.

Description

technical field [0001] The invention relates to an EVA material for solar cell packaging, in particular to an EVA hot-melt adhesive packaging material and a preparation method thereof. Background technique [0002] EVA resin (that is, ethylene-vinyl acetate copolymer) has been widely used as a solar energy encapsulation material. In the process of solar cell encapsulation, EVA resin plays the role of the upper cover and the lower pad for the solar cells. Through thermal lamination, the EVA is bonded to the glass, the cells and the back plate respectively to support and connect the cells. ,Protective effects. When the solar cell is working, its temperature rises rapidly due to strong sunlight and stays at a high temperature for a long time, but the photoelectric conversion efficiency of the solar cell will decrease when it works at high temperature. [0003] At present, as a solar energy packaging material, EVA only pays attention to its adhesive performance and light tran...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J123/08C09J131/04C09J11/04C09J11/06H01L31/048
CPCY02E10/50
Inventor 郭岳郜菁岑航路忠林张凤鸣
Owner TIANWEI NEW ENERGY HLDG
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