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Ethylene vinyl acetate adhesive film and solar battery assembly

A technology of ethylene vinyl acetate and copolymers, applied in electrical components, circuits, photovoltaic power generation, etc., can solve problems such as difficult storage, easy generation of bubbles, lack of glue, etc., and achieve good temperature resistance, packaging processability, and light transmittance Good retention rate, excellent damp heat aging resistance and UV aging resistance effect

Active Publication Date: 2012-08-22
SUZHOU DUCHAMPS ADVANCED MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The currently used EVA film has disadvantages such as easy to generate air bubbles and lack of glue during lamination, and difficult to store in hot weather.

Method used

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  • Ethylene vinyl acetate adhesive film and solar battery assembly
  • Ethylene vinyl acetate adhesive film and solar battery assembly
  • Ethylene vinyl acetate adhesive film and solar battery assembly

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0035] The preparation method of the EVA adhesive film of the present invention is not particularly limited, for example, the EVA copolymer and the fluorescent whitening agent (or the whitening masterbatch containing the fluorescent whitening agent) can be mixed uniformly together with other auxiliary agents, and then extruded and cast , Cooling, traction, coiling and other processes are processed into EVA film. In order to prevent EVA from cross-linking in advance, the processing temperature should not exceed 90°C. However, whitening masterbatches are preferred. If whitening masterbatches are used, whitening masterbatches can be pre-prepared before mixing. Take the preparation of whitening masterbatch with a concentration of 0.5% as an example, for example, in terms of parts by mass, add 0.5 parts of C.I. fluorescent whitening agent 393 [1533-45-5] (Zhejiang Chuanhua Huayang Chemical Co., Ltd. Whitening agent OB-1) and 100 parts of VA content 28% EVA copolymers (U.S. DuPont...

Embodiment

[0040] The EVA copolymers adopted in the following examples are all purchased from DuPont Company of the United States, the VA content is 28% by mass, and the melt index (MI) is 20-30 grams / 10 minutes (190 ° C, 2.16 kg), differential scanning calorimetry The melting point determined by (DSC) is greater than 70°C, and the Vicat softening point is greater than 42°C.

[0041] Preparation of whitening masterbatch

[0042] In terms of parts by mass, 0.5 parts of C.I. fluorescent whitening agent 393 [1533-45-5] (Zhejiang Chuanhua Huayang Chemical Co., Ltd., fluorescent whitening agent OB-1) and 100 parts of EVA with a VA content of 28% were copolymerized (U.S. DuPont Company) was fully mixed, and melted and extruded in a twin-screw extruder to obtain a whitening masterbatch with a concentration of 0.5%, which was used in the following examples.

[0043] Preparation of solar cell modules

[0044] Use the EVA glue film of following embodiment to prepare solar cell module, as figure...

Embodiment 1

[0046] In 100 parts (parts by mass) of EVA copolymer (VA content 28%, U.S. DuPont), add 1 part of organic peroxide bis(tert-butylperoxyisopropyl) benzene (Akzo Nobel, Perkadox 14s-fl) , 0.5 parts of co-crosslinking agent trimethylolpropane triacrylate (Sartomer, SR351, USA), 0.5 parts of silane coupling agent γ-glycidyloxypropyl trimethoxysilane (Danyang Organic Silicon Material Industry Co., Ltd. , KH560), 0.1 part of UV absorber 2-hydroxyl-4-n-octyloxybenzophenone (Beijing Institute of Addition Auxiliaries, GW531), 0.1 part of light stabilizer bis(2,2,6,6 -Tetramethyl-4-piperidinyl) sebacate (Beijing Institute of Addition Auxiliaries, GW480) and 0.1 part of whitening masterbatch, mix all the raw materials evenly, add to a single-screw extruder and melt and extrude , the processing temperature should not exceed 90°C, and then through the processes of casting, cooling, pulling, coiling, etc., the EVA film S1 is obtained, and the thickness of the film is 0.6mm.

[0047] Gained...

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Abstract

The invention provides an ethylene vinyl acetate (EVA) adhesive film used for solar battery packaging. The adhesive film comprises the following components in part by mass: 100 parts of ethylene vinyl acetate, 0.01-4 parts of organic peroxides, 0.01-3 parts of cross-linking aid, 0.01-3 parts of silane coupling agent, 0.1-1 part of light stabilizing agent, 0-1 part of ultraviolet light absorbing agent and 0.0001-0.01 part of fluorescent whitening agent. The invention also provides a solar battery assembly which comprises the ethylene vinyl acetate adhesive film. The EVA adhesive film is not easy to produce air bubbles when the solar battery assembly is laminated. Both the EVA adhesive film and the solar battery assembly have excellent heat and humidity resistance, ageing resistance and ultraviolet aging resistance.

Description

technical field [0001] The invention relates to an ethylene vinyl acetate copolymer (EVA) adhesive film used for a solar battery module and a solar battery module using the adhesive film. Background technique [0002] Solar power is becoming the most important new energy source, and solar panels are the core part of the solar power generation system, and also the most valuable part of the solar power generation system. Its function is to convert the solar energy into electrical energy, or store it into the battery, or promote work load. The quality and cost of solar panels will directly determine the quality and cost of the entire system. [0003] EVA film is an important packaging material for solar cell modules. The currently used EVA film has disadvantages such as easy generation of air bubbles and lack of glue during lamination, and difficult storage in hot weather. [0004] Therefore, still need to develop a kind of EVA adhesive film that can solve the above problems...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/08C08K5/14C08K5/103C08K5/5435C08K5/5425H01L31/048
CPCY02E10/50
Inventor 符书臻罗吉江
Owner SUZHOU DUCHAMPS ADVANCED MATERIALS CO LTD
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