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High-volume resistivity EVA (Ethylene Vinyl-acetate Copolymer) rubber film and preparation process thereof

A technology with high volume resistivity and preparation process, applied in circuits, adhesives, photovoltaic power generation, etc., can solve the problem of low volume resistivity, and achieve the effect of high volume resistivity, reducing conductive ions, and high cross-linking density

Active Publication Date: 2013-06-12
浙江利昌科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Looking at the existing domestic EVA film, the volume resistivity is relatively low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0016] (1) Formula

[0017] EVA resin 82%; polyolefin elastomer (POE) 15%; UV aging resistance additive (benzophenone) 0.5%; crosslinking agent 1.5%; coupling agent 1.0%.

[0018] (2) Product performance

[0019] Volume resistivity: 2.5×10 15 Ω.cm;

[0020] Breakdown voltage strength: 31kV / mm;

[0021] Light transmittance: 91.5%;

[0022] Peel strength of EVA film / glass: 65N / cm;

[0023] Cross-linking degree: 88%;

[0024] UV aging resistance (UV1000h, 60°C): yellowing index (ΔYI) 1.6;

[0025] Humid heat aging resistance (RH85%, 85℃, 1000h), yellowing index (ΔYI) 1.8.

[0026] The product meets the requirements of photovoltaic modules for high volume resistivity EVA film.

example 2

[0028] (1) Formula

[0029] EVA resin 89%; polyolefin elastomer (POE) 9.5%; UV aging resistance additives (hindered amines) 0.3%; crosslinking agent 0.8%; coupling agent 0.4%.

[0030] (2) Product performance

[0031] Volume resistivity: 1.1×10 15 Ω.cm;

[0032] Breakdown voltage strength: 29kV / mm;

[0033] Light transmittance: 91.2%;

[0034] Peel strength of EVA film / glass: 62N / cm;

[0035] Cross-linking degree: 85%;

[0036] UV aging resistance (UV1000h, 60°C): yellowing index (ΔYI) 1.3;

[0037] Humid heat aging resistance (RH85%, 85℃, 1000h), yellowing index (ΔYI) 1.7.

[0038] The product meets the requirements of photovoltaic modules for high volume resistivity EVA film.

example 3

[0040] (1) Formula

[0041] EVA resin 94%; polyolefin elastomer (POE) 5%; UV aging resistance additive (benzophenone) 0.1%; crosslinking agent 0.8%; coupling agent 0.1%.

[0042] (2) Product performance

[0043] Volume resistivity: 1.5×10 15 Ω.cm;

[0044] Breakdown voltage strength: 30kV / mm;

[0045] Light transmittance: 91.2%;

[0046] Peel strength of EVA film / glass: 52N / cm;

[0047] Cross-linking degree: 85%;

[0048] UV aging resistance (UV1000h, 60°C): yellowing index (ΔYI) 1.5;

[0049] Humid heat aging resistance (RH85%, 85℃, 1000h), yellowing index (ΔYI) 1.8.

[0050] The product meets the requirements of photovoltaic modules for high volume resistivity EVA film.

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Abstract

The invention relates to a packaging material of a photovoltaic module, in particular to a high-volume resistivity EVA (Ethylene Vinyl-acetate Copolymer) rubber film and a preparation process of the rubber film. The EVA rubber film comprises the following components in percentage by weight: 82%-94% of EVA resin, 5%-15% of polyolefin elastomer (POE), 0.1%-0.5% of ultraviolet aging resisting additive, 0.3%-1.5% of liquid peroxide cross-linking agent and 0.1%-1.0% of liquid silane coupling agent. The high-volume resistivity EVA rubber film disclosed by the invention reduces the VA content, reduces generation of conductive ions, and can increase the resistivity. The polyolefin elastomer is easy to be cross-linked by the effect of an initiating agent, and a plurality of positions are cross-linked with the EVA molecule, thereby realizing high cross-linking density, firmer molecular chain, smaller free volume, higher resistivity, difficulty in conduction, so the EVA rubber film disclosed by the invention has higher volume resistivity which is as high as 1x1015 ohm.cm or higher.

Description

technical field [0001] The invention relates to a packaging material for a photovoltaic module, in particular to a high volume resistivity EVA adhesive film and a preparation process thereof. Background technique [0002] Solar photovoltaic modules are devices that convert solar energy into electrical energy. At present, the internationally accepted standards for photovoltaic modules are the International Electrotechnical Commission standard IEC61215: 2005 "Design Identification and Finalization of Crystalline Silicon Photovoltaic Modules for Ground Use" and IEC61646: 2008 "Thin Film Ground Photovoltaic Modules" Design Identification and Finalization". However, with the continuous development of photovoltaic module technology and some problems found in the use, that is, the module is under the action of high voltage for a long time, which causes leakage current between the glass and the packaging material, and a large amount of charge accumulates on the surface of the batter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J7/00C09J123/08C09J11/06H01L31/048
CPCY02E10/50
Inventor 詹显光
Owner 浙江利昌科技有限公司
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