Precouting liquid for fluorescent film coating

Abstract

The invention relates to a precoating liquid used to coating fluorescent screen that includes 0%-10% polystyrene latex, 1-10% polyvinyl alcohol, 0.5-10% colloidal silicon dioxide, 0-5% antiseptic and the other is water. The invention is used for making fluorescent screen by organic film. It could decrease mixing color and have fresh color.

Description

technical field [0001] The invention relates to a pre-coating liquid, in particular to a pre-coating liquid for fluorescent film coating. Background technique [0002] At present, the coating process of the color picture tube fluorescent screen is to firstly apply the pre-coating liquid, after the pre-coating liquid is coated, the fluorescent film is coated, and then the organic film is coated. Using this coating method, It is easy to cause poor color mixing on the fluorescent film, that is, residual phosphor particles of other colors are formed on the fluorescent film, which affects the color purity of the fluorescent film quality, and this pre-coating solution can only be combined with water-soluble latex to make the fluorescent surface , cannot be combined with non-water-soluble latex or organic film to make fluorescent surface. In addition, if this pre-coating solution is combined with water-insoluble latex or organic film in the production of fluorescent surface, then i...

AI Technical Summary

Problems solved by technology

[0002] At present, the coating process of the color picture tube fluorescent screen is to firstly apply the pre-coating liquid, after the pre-coating liquid is coated, the fluorescent film is coated, and then the organic film is coated. Using this coating method, It is easy to cause poor color mixing on the fluorescent film, that is, residual phosphor particles of other colors are formed on the fluorescent film, which affects the color purity of the fluorescent film quality, and this pre-coating solution can only be combined with water-soluble latex to make the fluorescent surface , cannot be combined with non-water-soluble latex or organic film to make fluorescent surface. In addition, if this pre-coating solution is combined with water-insoluble latex or organic film in the production of fluorescent surface, then in the whole tube production process of color picture tube Defective aluminum bubbles will occur during the degassing process of the organic film, which will cause the aluminum film to bow and eventually cause the entire tube to be defective.