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A kind of eva adhesive film and its preparation method and application

A film and cross-linking agent technology, applied in adhesives, films/sheets without carriers, film/sheet-like adhesives, etc., can solve problems such as large fluctuations, product scrapping, and difficulty in uniform mixing , to achieve the effect of reducing production costs

Active Publication Date: 2021-05-28
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

Once the room temperature is low, TAIC will still appear paste-like solidification phenomenon during the dropping process, even if it remains liquid when feeding, but a large amount of base material (EVA resin) has a low temperature, and the liquid TAIC will also change after contacting the base material. It becomes a paste, it is difficult to mix evenly
The degree of cross-linking in the same roll of EVA film produced in summer has better uniformity, and the degree of cross-linking in the same roll of EVA film produced in winter fluctuates greatly, generally 78% to 88% (the degree of cross-linking is expressed as a percentage Indicates) or even larger, and sometimes exceeds the range specified by the user, causing the product to be scrapped

Method used

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  • A kind of eva adhesive film and its preparation method and application

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preparation example Construction

[0028]The present invention also provides the preparation method of the EVA resin according to the above technical solution, including the following steps: mixing EVA resin, initiator, conventional crosslinker, coupling agent, ultraviolet absorber, antioxidant, and main crossage, then Melting to obtain the EVA film.

[0029]The present invention is preferably mixed with an ultraviolet absorber with 8 wt% EVA resin, and is prepared into a masterbatch by granulation mechanism, and then the masterbatch with the remaining EVA resin, initiator, conventional crosslinking agent, coupling agent, antioxidant and The main interchange agent is mixed, melted, extruded, and obtained the EVA film.

[0030]In the present invention, the ultraviolet absorber is powdered, prepared into a masterbatch, can avoid the voids of the ultraviolet absorber through the EVA resin, enriched in the bottom of the mixer, resulting in dispersion unevenness.

[0031]The present invention can not be particularly limited, depen...

Embodiment 1

[0036]An EVA film comprises a component of the following weight parts: 96 parts of the EVA resin, 1.2 parts peroxide-2-ethylhexylcarbonate, 1.2 parts of diethylene oxide, 0.4 parts of Diethylbenzene, γ- (methyl acryloyloxy) 0.8 parts of trimethoxysilane, 2- (2'-hydroxy-3 ', 5'-di-tert-butylphenyl) benzole, 0.5 parts of duzerikaulty - bistenedate bisonephosphite, B The oxide hydroxymethyl propane trisyl acrylate is 0.6 parts.

[0037]The method of preparing the EVA film described above includes:

[0038]The benzotriazole is mixed with 8% EVA resin, and the masterbatch is prepared by the granulation mechanism, and then the masterbatch and the remaining EVA resin, the peroxide-2-ethylhexylcarbonate, divinylbenzene, γ- (methacryloxy) trimethoxysilane, dibrant alkyl pentaerythritol double phosphite and ethylene hydroxymethyl propane trikacrylate mix, 90 ° C melting, extruded, obtained EVA glue membrane.

Embodiment 2

[0040]An EVA film includes a component of the following weight parts: 92 EVA resin, 2.0 parts of tert-butyl peroxide-2-ethylheracone, 1.0 parts of tri-propyl isocyanurate, vinyl three 1.5 parts of oxygen silane, 1.0 parts of phenyl ketone, three (2,4-di-tert-butylphenyl) phosphite, lysate, ethylene hydroxyl 1.0 parts of methyl propane triacrylate.

[0041]The method of preparing the EVA film described above includes:

[0042]Diphenyl ketone is mixed with 8% EVA resin, and the masterbatch is prepared by the granulation mechanism, and then the masterbatch and the remaining EVA resin, tert-butyl peroxide-2-ethylhexyl, trioyl Isocyanurate, vinyltrimethoxysilane, trimethoxysilane, three (2,4-di-tert-butyl) phosphite and ethylene hydroxymethyl propane triacrylate mix, 95 ° C melting, extrusion, obtained The EVA film film is described.

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Abstract

The invention provides an EVA adhesive film and a preparation method and application thereof, which belong to the technical field of photovoltaic module packaging. The EVA adhesive film provided by the present invention comprises the following components in parts by weight: 92-98 parts of EVA resin, 0.5-2.0 parts of initiator, 0-1.0 part of traditional crosslinking agent, 0.3-1.5 parts of coupling agent, ultraviolet absorbing 0.1-1.0 parts of anti-oxidant, 0.5-1.5 parts of antioxidant, 0.6-1.0 parts of main cross-linking agent; the main cross-linking agent includes ethoxylated trimethylolpropane triacrylate. The results of the examples show that the performance of the EVA film prepared by the present invention is stable, and the fluctuation range of the degree of crosslinking is 82-85%.

Description

Technical field[0001]The present invention relates to the field of photovoltaic assembly packaging, and more particularly to an EVA film and a preparation method thereof.Background technique[0002]EVA (ethylene-vinyl acetate copolymer) film is often used in photovoltaic module packages, and its crosslinking is an important indicator. The EVA film having high cross-linking is better, and it can remain in good time during use. Mechanical performance, the degree of crosslinking of my country's national standards is not less than 75%, in fact, most of the cross-linking degree required by most photovoltaic modules is not less than 80%, generally required 80% to 85%, the upper limit does not exceed 90 %. The blended crosslinking agent has not crosslinked in the EVA film factory, and the crosslink is zero. When the photovoltaic assembly is produced, the crosslinking reaction is generated due to high temperature and high pressure, and the corresponding cross-linking is obtained. This process...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J4/06C09J11/06C09J7/30C09J7/10H01L31/048
CPCC09J4/06C09J11/06C09J2423/04C09J7/10C09J7/30H01L31/0481Y02E10/50
Inventor 蒋祥吉周雪梅詹显光
Owner 浙江利昌科技有限公司