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A preparation method of an optical composite film with both diffusion and reflection functions

An optical composite film and functional technology, applied in optics, optical components, optical components, etc., can solve the problems of uneven light distribution, limited brightness of backlight modules, etc., achieve excellent mechanical and optical properties, light weight, low The effect of production costs

Active Publication Date: 2022-05-10
NINGBO DXC NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the microporous structure in the traditional reflective film is limited to improve the brightness of the backlight module, and there are problems such as uneven light distribution in the backlight module, and obvious shadows can be observed.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1, a method for preparing an optical composite film with both diffusion and reflection functions, is characterized in that it comprises the following steps:

[0018] A. Ultrasonically mix the fiber with a sulfuric acid solution with a mass percentage of 40% at a mass volume ratio of 1:80g / ml to obtain solution A, react at 90°C for 5 hours, and then add ammonia water and mass percentage to solution A The 60% tetraisopropanone titanate solution continued to react for 5 hours. After the reaction, it was centrifuged and washed with ethanol, and dried in an oven at 70°C to obtain cellulose / titanium dioxide core-shell spherical diffusion particles. Among them, mechanically pulverized polyester staple fibers, the length of the mechanically pulverized polyester staple fibers is controlled between 1-3mm.

[0019] B. Melting high-density polyethylene and polymethacrylic resin with a mass ratio of 3:1g / ml on a roller mill at 170°C, adding titanium dioxide particles for ...

Embodiment 2

[0021] Embodiment 2, a method for preparing an optical composite film with both diffusion and reflection functions, is characterized in that it comprises the following steps:

[0022] A. Ultrasonically mix the fiber with a sulfuric acid solution with a mass percentage of 40% at a mass volume ratio of 1:50g / ml to obtain solution A, react at 80°C for 6 hours, and then add ammonia water and mass percentage to solution A The 70% titanium tetrachloride solution continued to react for 4 hours, after the reaction was completed, it was centrifuged and washed with ethanol, and dried in an oven at 75°C to obtain cellulose / titanium dioxide core-shell spherical diffusion particles. Among them, mechanically pulverized polyester staple fibers, the length of the mechanically pulverized polyester staple fibers is controlled between 1-3mm.

[0023] B. Melt high-density polyethylene and polystyrene with a mass ratio of 3:1.2g / ml on a roller mill at 180°C, add silica particles to blend, the tota...

Embodiment 3

[0025] Embodiment three, a kind of preparation method of the optical composite film with diffusion and reflection function, is characterized in that comprising the following steps:

[0026] A. Ultrasonically mix the fiber with a sulfuric acid solution with a mass percentage of 40% at a mass volume ratio of 1:100g / ml to obtain solution A, react at 60°C for 4.5h, and then add ammonia water and mass percentage to solution A The titanium tetrabromide solution with a content of 50% continued to react for 8 hours. After the reaction, it was centrifuged and washed with ethanol, and dried in an oven at 65°C to obtain cellulose / titanium dioxide core-shell spherical diffusion particles. Among them, mechanically pulverized polyester staple fibers, the length of the mechanically pulverized polyester staple fibers is controlled between 1-3mm.

[0027] B. Melt high-density polyethylene and polymethacrylic resin at a mass ratio of 3:0.5g / ml on a roller mill at 160°C, add titanium dioxide par...

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Abstract

A method for preparing an optical composite film with both diffusion and reflection functions, comprising the following steps: A. reacting fibers, sulfuric acid solution, ammonia water and titanium salt solution to obtain cellulose / titanium dioxide core-shell spherical diffusion particles; B. Polyethylene and incompatible resins are melted on a roll mill at 150-180°C with a mass ratio of 3:0.5-1.5g / ml, added to blend with inorganic particles, and pressed to obtain an optical base film; C. The fiber obtained in step A The element / titanium dioxide core-shell spherical diffusion particles, the acrylic resin, and the maleic anhydride are melted and mixed to obtain a melt mixed solution, and the melt mixed solution is coated on the coated surface of the optical base film, and dried to obtain a composite film. The optical film prepared by the invention has both reflection and diffusion properties, and improves the optical performance of the reflection film.

Description

technical field [0001] The invention relates to a preparation method of an optical thin film. Background technique [0002] With the rapid development of science and technology, liquid crystal displays with thin thickness, light weight, low energy consumption and low working voltage are widely used. As a passive display device, liquid crystal displays do not emit light themselves, and the display function benefits from the modulation of the backlight. The performance index of the display depends on the performance of the backlight source, so the performance of the light source of the backlight module directly affects the quality of liquid crystal display. The reflective film is one of the most important optical films in the backlight module of the liquid crystal display. In the liquid crystal display, the reflective film is at the bottom of the backlight module of the light guide plate, reflecting the light leaked from the light source back to the light guide plate, so that ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29D7/01B29D11/00G02B5/126G02B5/02G02F1/13357G02B6/00
CPCB29D7/01B29D11/00G02B5/126G02B5/0242G02B5/0268G02B5/0284G02F1/1336G02B6/0055G02B6/0051
Inventor 罗培栋凡雪蒙魏俊峰
Owner NINGBO DXC NEW MATERIAL TECH
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