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Surface treatment method for improving adhesive performance of fluorine-containing resin film

A technology of surface treatment and fluorine-containing resin, which is applied in the field of surface treatment to improve the bonding performance of fluorine-containing resin films, which can solve the problems of poor bonding performance between fluorine-containing resin films and EVA film lamination, and achieve good modification effects , simple process, mild and easy-to-control reaction conditions

Active Publication Date: 2013-02-06
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a new surface treatment method for fluorine-containing resin film, by irradiating the grafted polymer segment with ultraviolet light on the surface of the film to improve the poor bonding performance of fluorine-containing resin film and EVA film. question

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Dissolve benzophenone, trimethylolpropane triacrylate and butyl acrylate in ethanol to form a solution. The concentration of trimethylolpropane triacrylate in the reaction liquid is 10wt% (wt% represents the mass percentage concentration, the same below), the concentration of butyl acrylate is 30wt%, and the concentration of benzophenone is 0.8wt%. Apply the prepared reaction solution evenly on the tetrafluoroethylene-hexafluoropropylene-vinylidene fluoride copolymer film, and the coating amount is 15g / m 2 , and then placed under a high-pressure mercury lamp with a light intensity of 9000μW / cm 2 (λ = 254nm), the treated film was dried after 3 minutes of irradiation. The peel strength after drying the treated film and the EVA film after lamination and bonding is 30N / cm.

Embodiment 2

[0024] Dissolve benzophenone, trimethylolpropane triacrylate and butyl acrylate in ethanol to form a solution. The concentration of trimethylolpropane triacrylate in the reaction liquid is 15wt%, the concentration of butyl acrylate is 25wt%, and the concentration of benzophenone is 0.5wt%. Apply the prepared reaction solution evenly on the polyvinylidene fluoride film, the coating amount is 15g / m 2 , and then placed under a high-pressure mercury lamp with a light intensity of 6500μW / cm 2 (λ = 254nm). The treated film was dried after 90 seconds of irradiation. The peel strength after drying the treated film and the EVA film after lamination and bonding was 39N / cm.

Embodiment 3

[0026] Dissolve thioxanthone, trimethylolpropane triacrylate and butyl acrylate in methanol to form a solution. The concentration of trimethylolpropane triacrylate in the reaction liquid is 20wt%, the concentration of butyl acrylate is 20wt%, and the concentration of thioxanthone is 1wt%. The prepared reaction solution is evenly coated on the polyvinyl fluoride film, and the coating amount is 10g / m 2 , and then placed under a high-pressure mercury lamp with a light intensity of 7000μW / cm 2 (λ = 254nm), the treated film was dried after irradiation for 5 minutes. The peel strength after drying the treated film and the EVA film after lamination and bonding was 47N / cm.

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PUM

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Abstract

The invention provides a surface treatment method for improving adhesive performance of fluorine-containing resin film, and relates to the field of surface ultraviolet grafting for the fluorine-containing resin film. In the surface treatment method, reacting liquid containing monomers, photo initiators and solvent is uniformly coated on the surface of the fluorine-containing resin film by the coating quantity of 5-20g / m<2>, then the fluorine-containing resin film is subjected to surface modification under irradiation of an ultraviolet source for 20 seconds to 10 minutes, wherein the irradiation strength of the ultraviolet source is controlled within a scope of 4000-12000 microwatt per square centimeter by referring to the standard of the wavelength lambda equal to 254nm, and the monomers are mixtures of trimethylolpropane triacrylate and n-butyl acrylate. By the surface treatment method, the lamination adhesive performance of the fluorine-containing resin film and EVA (ethylene vinyl acetate) film can be improved, and accordingly problems of low peeling strength and poor durability after adhering of the fluorine-containing resin film and the EVA film are solved. The surface treatment method has a good modification effect to surfaces of the films only and cannot affect performance of the bodies of the films severely, and has the advantages of mild reaction condition, control easiness, simplicity and capability of realizing continuously industrial treatment.

Description

technical field [0001] The invention relates to a method for treating the surface of a fluorine-containing resin film with ultraviolet light grafting, so as to improve the lamination and bonding performance of the fluorine-containing resin film and an EVA adhesive film. Background technique [0002] As the outermost layer on the back of the solar cell module, the solar cell backsheet material plays the role of protecting the crystalline silicon cell from water vapor in the outdoor environment, blocking oxygen to prevent oxidation, high and low temperature resistance, insulation and anti-ultraviolet rays. One of the important components for outdoor service life. Traditional backsheet materials are laminated with fluorine-containing resin and polyester (PET), usually using a three-layer structure of fluorine-containing resin / PET / fluorine-containing resin. A typical representative is the TPT structure backplane produced by Isovolta in Europe, T represents the polyvinyl fluorid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/18C08L27/12C08L27/16C08L23/08C08L27/18C08L27/20
Inventor 杨万泰赵长稳马育红
Owner BEIJING UNIV OF CHEM TECH
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