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A kind of high-performance eva photovoltaic encapsulation adhesive film preparation process and its products

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 resin, and acetic acid-based Poor stability and other problems, to achieve the effect of improving anti-PID performance, improving peel strength, and high peel strength

Active Publication Date: 2017-04-05
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] 94.5% of EVA resin;

[0014] Multifunctional cage polysilsesquioxane 3%;

[0015] Crosslinking initiator 1%;

[0016] Coupling initiator 1%

[0017] 0.5% of solid benzophenone anti-ultraviolet aging additives;

[0018] The preparation steps are as follows:

[0019] (1) First, mix benzophenone anti-ultraviolet aging additives, multifunctional cage polysilsesquioxane and EVA resin. The multifunctional group and EVA resin are mixed at a mixing temperature of 1:10 at a mixing temperature of 100°C. After mixing, granulate through a granulator;

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

[0021] (3) Melt the mixture through an extruder, extrude it into a film from the die, press the film through a pressing roller, cool and shape, and rewind to obtain the finished EVA film.

[0022] Product performance:

[0023] Volume resistivity: 2.5×10 15 Ω.cm;

[0024] Light transmi...

example 2

[0031] The formula is as follows:

[0032] 98% of EVA resin;

[0033] Multifunctional cage polysilsesquioxane 0.9%;

[0034] 0.6% of crosslinking initiator;

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

[0036] The preparation steps are as follows:

[0037] (1) First, the polyfunctional cage polysilsesquioxane and EVA resin are mixed at a ratio of 1:15 at a mixing temperature of 80°C, and then granulated by a granulator after mixing;

[0038] (2) Mix the particles obtained by mixing and granulating 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 an extruder, extrude it into a film from the die, press the film through a pressing roller, cool and shape, and rewind 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 / glass: 68N / cm;

[00...

example 3

[0049] The formula is as follows:

[0050] EVA resin 96.7%;

[0051] Multifunctional cage polysilsesquioxane 2%;

[0052] Coupling initiator 1%

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

[0054] The preparation steps are as follows:

[0055] (1) First, the polyfunctional cage polysilsesquioxane and EVA resin are mixed at a ratio of 1:5, and the solid benzophenone anti-ultraviolet aging additives are mixed together at a mixing temperature of 90°C, after mixing Granulate through a granulator;

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

[0057] (3) Melt the mixture through an extruder, extrude it into a film from the die, press the film through a pressing roller, cool and shape, and rewind 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: 68N / cm;

[0062] ...

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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 process for preparing a high-performance EVA photovoltaic encapsulation 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 a cross-linking agent and a cross-linking assistant to the EVA encapsulating film to increase the degree of cross-linking between the copolymer molecules. In addition, the EVA photovoltaic encapsulation film also needs to have high peel strength after lamination and glass, backplane and other encapsulation materials. This is usually done by adding a cou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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