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Anti-scratching diffusion film and method for preparing the same

A technology of diffusion film and diffusion particles, which is applied in optics, instruments, nonlinear optics, etc., can solve the problem that the particles in the anti-adhesion layer are easy to fall off, etc., achieve good anti-scratch effect, reduce adverse phenomena, and improve optical performance.

Active Publication Date: 2017-06-30
NINGBO CHANGYANG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the particles in the anti-adhesion layer of the existing diffusion film are easy to fall off during the assembly process, the invention provides a scratch-resistant diffusion film and its preparation method

Method used

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  • Anti-scratching diffusion film and method for preparing the same
  • Anti-scratching diffusion film and method for preparing the same
  • Anti-scratching diffusion film and method for preparing the same

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preparation example Construction

[0051] The present invention provides the preparation method of described anti-scratch diffusion film, and this method comprises the following steps:

[0052] (1) The substrate is firstly coated by wet coating. The particle size of the scattering particles is 3-15 μm, the particle size range of the front-coated particles is 5-15 μm, and the particle size range of the back-coated particles is 3 μm. ~5μm;

[0053] (2) The coating solution is mainly composed of scattering particles and UV glue, wherein the scattering particles are preferably polymethyl methacrylate, and the UV glue is preferably an acrylic resin composition;

[0054] (3) The coated substrate enters the structure area, passes through the structured concave roller with microstructure on the surface, forms the front coating microstructure by transfer printing on the front coating, forms the back coating microstructure on the back coating, and the front coating microstructure The diameter range of the structure is p...

Embodiment 1

[0068] The anti-scratch diffusion film provided by the present invention, the diffusion film comprises a substrate PET with a thickness of 250 μm, one side of the substrate is provided with a positive coating, and the other side is provided with a back coating; the positive coating contains Scattering particles, the particle size of the scattering particles ranges from 5 to 15 μm; the surface of the positive coating has a positive coating microstructure, the positive coating microstructure is hemispherical and has a diameter of 30 μm, and the positive coating microstructure is The spacing is 0 (closely arranged); the back coating contains scattering particles, the diameter of the scattering particles is D, and 0<D≤5 μm, the surface of the back coating has a back coating microstructure, the The back-coated microstructure is hemispherical with a diameter of 10 μm, and the pitch of the back-coated microstructure is 60 μm.

[0069] The material of the positive coating comprises ul...

Embodiment 2

[0072] The anti-scratch diffusion film provided in Example 1, wherein, the microstructure of the positive coating is hemispherical, with a diameter of 50 μm, and the spacing of the microstructures of the positive coating is 0 (closely arranged); the surface of the back coating has Back-coated microstructures, the back-coated microstructures are hemispherical, with a diameter of 10 μm, and the pitch of the back-coated microstructures is 60 μm. The diameter range of the scattering particles in the back coating is 3-5 μm.

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Abstract

The invention, which belongs to the technical field of the backlight source device in a liquid crystal display module group, relates to a diffusion film, particularly to an anti-scratching diffusion film and a method for preparing the same. In order to solve a problem that particles in an anti-adhesion layer are easy to shed during a diffusion film assembling process, the invention provides an anti-scratching diffusion film and a method for preparing the same. The diffusion film comprise a base material; and a positive coating layer is arranged at one side of the base material and a back coating layer is arranged at the other side. The positive coating layer contains scattering particles; a positive coating microstructure being in a hemispherical shape is formed at the surface of the positive coating layer and the diameter range is 30 to 70 microns. The back coating layer contains scattering particles; a back coating microstructure being in a hemispherical shape is formed at the surface of the back coating layer and the diameter range is 5 to 30 microns. The diffusion film has an excellent optical performance and good anti-scratching property. Besides, the preparation method employs a way of simultaneous transferring of the front side and the back side; and thus one-step moulding is realized, the process is simple, and the method is easy to implement.

Description

technical field [0001] The invention belongs to the technical field of backlight source devices in liquid crystal display modules. The invention relates to a diffusion film, in particular to a scratch-resistant diffusion film and a preparation method thereof. Background technique [0002] Existing optical diffusion films are widely used in TVs, notebook computers, monitors, etc. With the rapid development of liquid crystal display backlight sources, the requirements for diffusion films in liquid crystal backlight modules are correspondingly increased. The traditional diffusion film production adopts the process of coating, and the diffusion layer is formed after thermosetting. During the assembly process, the product diffusion film is die-cut and placed directly on the light guide plate. It is easy to cause friction between the anti-adhesion layer and the light guide plate. Particles in the anti-adhesion layer fall off, resulting in poor light transmission and display of liq...

Claims

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Application Information

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IPC IPC(8): G02B5/02G02B1/14G02F1/13357
CPCG02B1/14G02B5/0215G02B5/0268G02F1/1336
Inventor 金亚东杨婷
Owner NINGBO CHANGYANG TECH
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