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Optical diffusion film and preparation method thereof

A technology of optical diffusion and diffusion layer, used in optics, optical components, instruments, etc., can solve the problems of difficult to control particle distribution uniformity, poor resin adhesion, film curling, etc.

Active Publication Date: 2015-03-25
SICHUAN DONGFANG INSULATING MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in these documents, there are disadvantages such as poor adhesion between the diffusion particles and solvents and resins, difficulty in controlling the uniformity of particle distribution, and differences in shrinkage between the base material and the diffusion layer, which may lead to film curling.

Method used

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  • Optical diffusion film and preparation method thereof
  • Optical diffusion film and preparation method thereof
  • Optical diffusion film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] (1) Preparation of diffusion layer coating solution

[0061] a. Add 8.52 parts by weight of tetraethyl orthosilicate, 3.35 parts by weight of silane coupling agent GX560, 69 parts by weight of ethanol, 9 parts by weight of water and 0.75 parts by weight of 0.15mol / L dilute hydrochloric acid into the stirring tank A , stirred at room temperature for 1 hour, and set aside;

[0062] b. Add 5.59 parts by weight of A-101 thermoplastic acrylic resin and 46 parts by weight of ethyl acetate into the stirring tank B, and stir for 1 hour until the resin is completely dissolved;

[0063] c. Add the solution in stirring tank B into stirring tank A, and stir at room temperature for 2 hours until the mixture is uniform. The diffusion layer coating solution with a solid content of 16.18% and a viscosity of 1769 cps was prepared for subsequent use.

[0064] (2) Preparation of hardened layer coating solution

[0065] Add 4.37 parts by weight of low-viscosity polyester acrylate, 27.27...

Embodiment 2

[0070] Taking Example 1 as the basic scheme of this example, the amount of raw materials and the types thereof are replaced by: the amount of silicon source tetraethyl orthosilicate is 17 parts by weight, the amount of A-101 thermoplastic acrylic resin is 14 parts by weight, photoinitiator 184 Replaced with 651, the amount of photoinitiator 651 is 0.94 parts by weight, and the amount of other raw materials and production conditions remain unchanged. Among them: the temperature of the drying tunnel, the coating speed of the hardened layer and the intensity of ultraviolet light are shown in Table 1 below.

[0071]The solid content of the diffusion layer coating solution was 39.88%, and the viscosity was 2981 cps.

Embodiment 3

[0073] Taking Example 1 as the basic scheme of this example, the amount and variety of raw materials are replaced by: the amount of silane coupling agent GX560 and GX561 is 11.7 parts by weight (ratio is 50%:50%), dilute hydrochloric acid of 0.15mol / L The amount used is 2 parts by weight, the amount of low-viscosity polyester acrylate is 9 parts by weight, the amount of hexafunctional aliphatic urethane acrylate is 55 parts by weight, and the amount of other raw materials and production conditions remain unchanged. Among them: the temperature of the drying tunnel, the coating speed of the hardened layer and the intensity of ultraviolet light are shown in Table 1 below.

[0074] The solid content of the diffusion layer coating solution was 23.10%, and the viscosity was 2043 cps.

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Abstract

The invention discloses an optical diffusion film. The optical diffusion film is characterized by being composed of a polyester film layer, diffusion layers and hardened layers, wherein the polyester film layer is located in the middle, the two sides of the polyester film layer are coated with the diffusion layers, and the diffusion layers on the two sides of the polyester film layer are coated with the hardened layers; the thickness of the optical diffusion film ranges from 63 microns to 345 microns; each diffusion layer is a coating formed in the mode that a diffusion layer coating composition composed of a silicon source, a silane coupling agent, A-101 thermoplastic acrylic resin, ethanol, water and diluted hydrochloric acid is dried and cured at the temperature of 60-80 DEG C; each hardened layer is a coating formed in the mode that a hardened layer coating composition composed of ultraviolet cured resin, reactive diluent, photoinitiator and a leveling agent is cured under ultraviolet irradiation. The optical diffusion film has balanced light transmittance, haze and light diffusion performance, maintains high rigidity and dimensional stability and can be widely applied to manufacturing of liquid crystal display devices, advertising lamp boxes, illumination lamps and other devices requiring light sources.

Description

technical field [0001] The invention belongs to optical films, and relates to an optical diffusion film and a preparation method thereof. The optical diffusion film of the present invention has balanced light transmittance, haze and light diffusion performance, while maintaining high hardness and dimensional stability, and is suitable for liquid crystal displays, advertising light boxes, lighting fixtures and other devices requiring light sources. Background technique [0002] Optical diffusion film (referred to as diffusion film) is widely used in the manufacture of liquid crystal displays, advertising light boxes, lighting fixtures and other devices that require light sources. CCFL) or point light source (LED) is evenly converted into a surface light source to improve the brightness of the LCD panel. Increase the viewing angle, increase the softness of the light source, achieve the effect of optical diffusion, and also have the function of protecting the prism sheet. [...

Claims

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Application Information

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IPC IPC(8): G02B5/02G02B1/04G02B1/14
CPCG02B1/04G02B5/0242
Inventor 唐荣芝周柯舒维罗春明胡俊祥李质平
Owner SICHUAN DONGFANG INSULATING MATERIAL
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