Scratch-resistant optical diffusion film and preparation method for same

Abstract

The invention discloses a scratch-resistant optical diffusion film, which comprises a substrate layer, an optical diffusion layer and an anti-adhesion layer, wherein the optical diffusion layer comprises a resin film former, diffusion particles, a cross-linking agent and a solvent; the diffusion particles comprise organic particles and inorganic particles; the organic particles consist of large particles, medium particles and small particles; the large particles are PBMA (poly(n-butyl methacrylate)) particles or PIBMA (poly(isobutyl methacrylate) particles; the particle diameter ratio of the large particles to the medium particles is 5:1 to 3:1, and the mass ratio of the large particles to the medium particles is 1:6 to 1:3; the particle diameter ratio of the large particles to the small particles is 15:1 to 10:1, and the mass ratio of the large particles to the small particles is 1:1 to 1:3; the particle diameter ratio of organic particles to inorganic particles is 130:1 to 10:1, and the mass ratio of the organic particles to the inorganic particles is 50:1 to 5:1. The substrate layer, the surface optical diffusion layer and the anti-adhesion layer of the optical diffusion film are prepared by particle diffusion, dilution and drying and curing treatment. A preparation method is simple. A flexible contact surface is formed on the surface, so that high scratch resistance is achieved.

Description

technical field [0001] The invention relates to the technical field of optical diffusion film preparation, in particular to an anti-scratch optical diffusion film and a preparation method thereof. Background technique [0002] As a new material and new technology, optical diffusion film (referred to as diffusion film) is widely used in liquid crystal displays, advertising background lights, lighting light boxes and other fields. Especially in liquid crystal display devices, the diffusion film is a key component in the backlight module. The main function of the optical diffusion film is to change the light angle, atomize the light emitted by the backlight, and provide a uniform surface light source for the LCD panel. [0003] Whether it is the LED backlight that is widely used now or the traditional CCFL backlight, the light emitted by it is either a point light source or a line light source, and it is not a surface light source. However, it can be distributed into a unifor...

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Problems solved by technology

Due to the high investment in particle equipment due to the complex process of the filling method, the light transmittance of the obtained product is low and cannot well meet the existing needs. The diffusion film mentioned in CN102096128 and CN102096127 is also filled with diffusion particles in the transparent resin used. The preparation method of multi-layer composite is troublesome to prepare

[0006] In addition, because the organic diffusion particles in the diffusion layer of the existing diffusion film are all PMMA, PS and organic silicon particles, it is impossible to provide a soft contact surface when it is in contact with devices such as prism films, so that devices such as prism films are easily scratched. If there is an optical diffusion film, corresponding improvements need to be made

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