Hardened optical thin film and preparation method thereof

Abstract

The invention discloses a hardened optical thin film. A hardened coating with good optical property is uniformly coated on a transparent thin film base material. The hardened coating consists of 10-90 parts of ultraviolet curable resin, 10-30 parts of ultraviolet solid activity diluted resin, 2-15 parts of light initiator, 0-3 parts of flatting agent, and 10-90 parts of solvent. The hardened optical thin film disclosed by the invention has the advantages as follows: 1, the polyester has higher heat resistance, higher melting point and controllable degradation speed; 2, titanium dioxide sediments cannot be formed in a production process since the use amount of catalyst is small, so that the maintenance and replacement period of production equipment can be prolonged; 3, the vertical and transverse tearing intensities of the polyester material are higher; and 4, the structure of the polyester is easy to control, gel is difficult to form in a reaction process, and the processed film material has no crystal points which are formed by the gel.

Description

technical field [0001] The invention relates to a method for preparing an optical film, in particular to a method for preparing an optical film with relatively high hardness. Background technique [0002] In recent years, with the rapid development of the liquid crystal display industry, products such as smartphones and touch screens are widely used in daily life, so the demand for light and thin optically transparent plastic films is also increasing day by day. However, at present, most plastic film surfaces are easily scratched or scratched by mutual contact and friction. Therefore, coating or electroplating a layer of hard coating on the surface of plastic films is favored by the market. The optical poly film with surface hardening treatment It can be widely used as a protective panel for touch screens or as a substrate material for flexible ITO films. [0003] At present, there are mainly two methods for hardening the surface of polyester film. One mainly uses surface ...

AI Technical Summary

Problems solved by technology

However, at present, most plastic film surfaces are easily scratched or scratched by mutual contact and friction. Therefore, coating or electroplating a layer of hard coating on the surface of plastic films is favored by the market. The optical poly film with surface hardening treatment Can be widely used as a protective panel for touch screens or as a substrate material for flexible ITO films

[0003] At present, there are mainly two methods for hardening the surface of polyester film. One mainly uses surface electroplating to deposit a layer of inorganic oxide film, such as silicon dioxide and antimony trioxide. The equipment investment is large, the adhesion of the inorganic deposition layer is poor and the flexibility is poor and easy to crack; the other is mainly to coat the surface with a layer of organic polymer resin with high hardness. This method is simple and easy to coat and has good flexibility. For roll-to-roll film processing

[0004] Chinese patent 200910105659.2 discloses a display touch screen structure and its manufacturing method. Its structure includes a base chemically strengthened glass, an upper conductive layer and a lower conductive layer, and a hardened layer is provided on the surface of the upper conductive layer PET film. The ITO film is made on the surface of chemically strengthened glass, the manufacturing process of the touch screen is simplified and the yield rate of the product is improved, and the strength of the chemically strengthened glass is not changed at the same time. The disadvantage is that the light transmittance is damaged and the adhesion drops significantly.