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Ethylene-vinyl acetate copolymer adhesive film for packaging solar energy battery and preparation method thereof

A vinyl acetate copolymerization and solar cell technology, applied in chemical instruments and methods, applications, circuits, etc., can solve the problem of little research on thermal conductivity of EVA film, and achieve excellent UV aging resistance, good thermal conductivity, and thermal conductivity. Sex-enhancing effect

Inactive Publication Date: 2008-08-13
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the literature published abroad at present, there are few studies on the thermal conductivity of EVA film, and no literature reports have been seen yet.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] In terms of mass parts, 30 parts of 0.7 μm 0.5 μm alumina and 1.6 parts of titanate coupling agent (such as NDZ311) were thoroughly mixed, dried at 80 ° C, ground and dispersed, and then added to 1.3 parts of 2,5- Dimethyl-2,5-bis(tert-butyl peroxy)hexane curing agent and 100 parts of EVA pellets are mixed uniformly in the mixture; then 0.25 parts of p-(4-hydroxyl-3,5 di-tert Butylphenyl) n-octadecanyl propionate is used as an antioxidant, and 0.3 parts of bis(2,2,6,6-tetramethyl-4-piperidinyl) sebacate UV light stabilizer is added to the above mixture, and mix well. Pour the mixture into the extruder for blending and extrusion. The temperature is controlled at 100°C. After the extrusion is cast, cooled, drawn, and coiled, the EVA glue with a thermal conductivity of about 0.68W / m·K can be obtained. membrane.

Embodiment 2

[0030] In terms of mass parts, 100 parts of alumina with an average particle size of 0.7 μm and 2.0 parts of silane coupling agent (such as Al51) are fully mixed, dried at 80 ° C, ground and dispersed, and then added to 1.3 parts of 2,5-di Methyl-2,5-bis(tert-butyl peroxy)hexane curing agent and 100 parts of EVA pellets are mixed uniformly in the mixture; then 0.25 parts of antioxidant phosphite tris(2,4-di tert-butylphenyl) ester, 0.3 part of bis(2,2,6,6-tetramethyl-4-piperidinyl) sebacate UV light stabilizer was added to the above mixture, and mixed uniformly, the mixture was co- Mixed extrusion, the temperature is controlled at 105°C, and the extruded product is cast, cooled, drawn, and coiled to obtain an EVA film with a thermal conductivity of about 0.94W / m·K.

Embodiment 3

[0032] In terms of parts by mass, 80 parts of alumina with an average particle diameter of 1.0 μm are added to 1.3 parts of 2,5-dimethyl-2,5-bis(tert-butyl peroxy)hexane curing agent and 100 parts of EVA In the mixture after mixing uniformly in the pellets; then 0.25 parts of p-(4-hydroxy-3,5 di-tert-butylphenyl) n-octadecyl propionate as antioxidant, 0.3 parts of UV stabilizer Bis(2,2,6,6-tetramethyl-4-piperidinyl) sebacate was added to the above mixture and mixed well. Pour the mixture into the extruder for blending and extrusion. The temperature is controlled at 100°C. After the extrusion is cast, cooled, drawn, and coiled, the EVA glue with a thermal conductivity of about 0.63W / m·K can be obtained. membrane.

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Abstract

The invention discloses an ethylene-acetic acid polymer rubber film for solar energy battery packaging and preparation method thereof. The rubber film is composed of ethylene-acetic acid polymer granular materials, solidifier, heat-conducting filler, antioxidant, UV stabilizer, and coupling agent according to certain mass parts; the preparation method is: 1, mixing heat-conducting filler and coupling agent, drying and dispersing the mixture by grinding, to obtain active heat-conducting filer; 2, mixing ethylene-acetic acid polymer granular materials and solidifier; 3, mixing antioxidant, UV stabilizer and said active heat-conducting filler; 4, adding mixture of said step 3 into mixture of step 2, mixing the mixture and extruding the mixture, casting, cooling, towing, coiling the extrusion, obtain rubber film of the invention. Compared with current products, the rubber film of the invention has a higher heat-conducting coefficient which is increased by more than 3 times, and properties of improved photo-electric conversion ratio of solar energy battery, and prolonged useful life.

Description

1. Technical field [0001] The invention relates to a polymer encapsulation material for solar cells, in particular to an ethylene-vinyl acetate copolymer (EVA) adhesive film used for encapsulation of solar cells and a preparation method thereof. 2. Background technology [0002] Solar cells are packaged with silicon wafers by means of two layers of polymer packaging films, and then bonded with upper and lower protective layer materials glass, TPT film or aluminum alloy plate. First of all, the encapsulation material must be transparent, and the transmittance must be high, so as to ensure that the encapsulated solar cell module has sufficient photoelectric conversion efficiency; in addition, the encapsulation material must have strong adhesive force, so that it can be better fixed and Protect the solar cells; the packaging material is thermosetting to ensure reliable operation of solar modules at high temperatures. Before the 1980s, liquid silicone resin and polyvinyl butyra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/10C09J123/08C09J7/00H01L31/0203H01L31/048
CPCB32B17/10788B32B17/10642B32B17/10678B32B2457/12
Inventor 申明霞何辉
Owner HOHAI UNIV
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