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Preparation technology and product of high-performance EVA photovoltaic packaging adhesive film

A technology for encapsulating adhesive films and preparation processes, which is applied in the direction of adhesives, film/sheet adhesives, non-polymer adhesive additives, etc., and can solve the problems of insufficient aging performance, low tensile strength of resins, and acetic acid-based Poor stability and other issues

Active Publication Date: 2015-05-06
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

Because EVA is a copolymer of ethylene and vinyl acetate, which is an elastomer, the tensile strength of the resin itself is not high; the stability of the acetate group is relatively poor, and the aging performance is not good enough.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0012] The formula is as follows:

[0013] EVA resin 94.5%;

[0014] Multifunctional cage polysilsesquioxane 3%;

[0015] Cross-linking initiator 1%;

[0016] Coupling initiator 1%

[0017] Solid benzophenone anti-ultraviolet aging additive 0.5%;

[0018] The preparation steps are as follows:

[0019] (1) First mix benzophenone anti-ultraviolet aging additives, polyfunctional cage polysilsesquioxane and EVA resin, the multifunctional group and EVA resin are mixed at a ratio of 1:10, and the mixing temperature is 100°C. After mixing, it is granulated by a granulator;

[0020] (2) Mix the particles obtained by mixing and granulation with other various raw materials in a mixer to make a mixture;

[0021] (3) Melt the mixture through the extruder, extrude it into a film form from the die head, press the film through the pressure roller, cool and shape it, and wind it up to obtain the finished EVA film.

[0022] Product performance:

[0023] Volume resistivity: 2.5×10 15 ...

example 2

[0031] The formula is as follows:

[0032] EVA resin 98%;

[0033] Multifunctional cage polysilsesquioxane 0.9%;

[0034] Cross-linking initiator 0.6%;

[0035] Liquid hindered amine anti-ultraviolet aging additive 0.5%;

[0036] The preparation steps are as follows:

[0037] (1) Mix multifunctional cage polysilsesquioxane and EVA resin at a ratio of 1:15 at a mixing temperature of 80°C. After mixing, granulate through a granulator;

[0038] (2) Mix the particles obtained by mixing and granulation with other various raw materials and liquid hindered amine anti-ultraviolet aging additives in a mixer to make a mixture;

[0039] (3) Melt the mixture through the extruder, extrude it into a film form from the die head, press the film through the pressure roller, cool and shape it, and wind it up to obtain the finished EVA film.

[0040] Product performance:

[0041] Volume resistivity: 1.9×10 15 Ω.cm;

[0042] Light transmittance: 91.8%;

[0043] Peel strength of EVA film...

example 3

[0049] The formula is as follows:

[0050] EVA resin 96.7%;

[0051] Polyfunctional cage polysilsesquioxane 2%;

[0052] Coupling initiator 1%

[0053] Benzophenone anti-ultraviolet aging additive 0.3%;

[0054] The preparation steps are as follows:

[0055] (1) First, mix multifunctional cage polysilsesquioxane and EVA resin at a ratio of 1:5, and mix with solid benzophenone anti-ultraviolet aging additives. The mixing temperature is 90°C. After mixing, Granulated by a granulator;

[0056] (2) Mix the particles obtained by mixing and granulation with other various raw materials in a mixer to make a mixture;

[0057] (3) Melt the mixture through the extruder, extrude it into a film form from the die head, press the film through the pressure roller, cool and shape it, and wind it up to obtain the finished EVA film.

[0058] Product performance:

[0059] Volume resistivity: 2.1×10 15 Ω.cm;

[0060] Light transmittance: 91.5%;

[0061] Peel strength of EVA film / glass: ...

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Abstract

The invention relates to a preparation technology and a product of a high-performance EVA photovoltaic packaging adhesive film. The product comprises the following raw material components in parts by weight percentage: 94.5-98% of EVA resin, wherein the content of VA in the EVA resin is 24-28% and the melt flow speed of the EVA resin is 15g / 10min-35g / 10min; 0.3-3% of multifunctional group cage-type polysilsesquioxane, 0.2-1% of crosslinking initiator, and / or 0.2-1% of coupling initiator, 0.1-0.5% of anti-ultraviolet anti-aging additive, and liquid or solid with a melting point of less than 90 DEG C; the method includes the steps of mixing, granulating, melting, extruding into a film shape from a die head, pressing the film through a press roller, cooling and sizing, rolling to obtain the EVA adhesive film product. By means of adding a functional POSS, the POSS molecule contains a plurality of ethylene and / or coupling groups of glass / backboard as additives so that many functions of the EVA photovoltaic packaging adhesive film can be improved and the high-performance EVA photovoltaic packaging adhesive film can be prepared.

Description

technical field [0001] The invention relates to a preparation process of a high-performance EVA photovoltaic packaging film. Background technique [0002] EVA photovoltaic encapsulation film requires high light transmittance, while meeting the requirements of high tensile strength, low water vapor transmission rate, and high anti-aging performance. Because EVA is a copolymer of ethylene and vinyl acetate, which is an elastomer, the tensile strength of the resin itself is not high; the stability of the acetate group is relatively poor, and the aging performance is not good enough. These two shortcomings can be improved by adding cross-linking agents and cross-linking aids to the EVA packaging film to increase the degree of cross-linking between copolymer molecules. In addition, the EVA photovoltaic encapsulation adhesive film also needs to meet the high peel strength after lamination and encapsulation materials such as glass and backplane. This is usually achieved by adding ...

Claims

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Application Information

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IPC IPC(8): C09J7/00C09J123/08C09J11/06
Inventor 詹显光李西军蒋祥吉
Owner 浙江利昌科技有限公司
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