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Preparation method of high-fog high-transmittance light diffusion film

A high-transmittance, light-diffusing film technology, applied in optics, optical components, nonlinear optics, etc., can solve the problems of inability to obtain light diffusion effects and difficulties in effectively dispersing particles, and achieve the effect of avoiding easy agglomeration

Pending Publication Date: 2021-12-03
NINGBO DXC NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the light diffusion particles are easy to agglomerate, it is difficult to effectively disperse the particles, and the ideal light diffusion effect is often not obtained.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A method for preparing a light-diffusing film with high fog and high transmittance, comprising the following steps:

[0022] S1: Mix epoxy resin monomer, cross-linking agent, liquid crystal droplets, initiator, and glass beads together in the following parts by mass and stir until uniform, thereby forming a polymer-dispersed liquid crystal coating:

[0023] 30 parts by mass of single epoxy resin monomer;

[0024] Diethylene glycol diacrylate (DEGDA) 20 mass parts;

[0025] 50 parts by mass of liquid crystal droplets;

[0026] 0.6 parts by mass of benzoyl peroxide;

[0027] 0.7 parts by mass of glass beads;

[0028] S2: The polymer-dispersed liquid crystal coating is evenly coated between two layers of PET matrix films, and pressed into a three-in-one film;

[0029] S3: heat curing: the pressed three-in-one film is cured by heat to obtain a light diffusion film with high haze and high transmittance.

[0030] Wherein the diameter of the liquid crystal droplet is 1.5-...

Embodiment 2

[0032] A method for preparing a light-diffusing film with high fog and high transmittance, comprising the following steps:

[0033] S1: Mix epoxy resin monomer, cross-linking agent, liquid crystal droplets, initiator, and glass beads together in the following parts by mass and stir until uniform, thereby forming a polymer-dispersed liquid crystal coating:

[0034] 25 parts by mass of single epoxy resin monomer;

[0035] 10 parts by mass of polyethylene glycol (200) diacrylate (i.e. PEGDA-200);

[0036] 70 parts by mass of liquid crystal droplets;

[0037] 0.9 parts by mass of tert-butyl hydroperoxide;

[0038] 0.6 parts by mass of glass beads;

[0039] S2: The polymer-dispersed liquid crystal coating is evenly coated between two layers of PET matrix films, and pressed into a three-in-one film;

[0040] S3: heat curing: the pressed three-in-one film is cured by heat to obtain a light diffusion film with high haze and high transmittance.

[0041] Wherein the diameter of the...

Embodiment 3

[0043] A method for preparing a light-diffusing film with high fog and high transmittance, comprising the following steps:

[0044] S1: Mix epoxy resin monomer, cross-linking agent, liquid crystal droplets, initiator, and glass beads together in the following parts by mass and stir until uniform, thereby forming a polymer-dispersed liquid crystal coating:

[0045] 40 parts by mass of single epoxy resin monomer;

[0046] Polyethylene glycol (400) diacrylate (i.e. PEGDA 400) 4 mass parts;

[0047] 40 parts by mass of liquid crystal droplets;

[0048] 1.0 parts by mass of dicumyl peroxide;

[0049] 0.8 parts by mass of glass beads;

[0050] S2: The polymer-dispersed liquid crystal coating is evenly coated between two layers of PET matrix films, and pressed into a three-in-one film;

[0051] S3: heat curing: the pressed three-in-one film is cured by heat to obtain a light diffusion film with high haze and high transmittance.

[0052] Wherein the diameter of the liquid crystal...

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Abstract

A preparation method of a high-fog high-transmittance light diffusion film comprises the following steps: S1, mixing an epoxy resin monomer, a cross-linking agent, liquid crystal droplets, an initiator and glass beads together, and uniformly performing stirring to form a polymer dispersed liquid crystal coating; S2, uniformly coating the polymer dispersed liquid crystal coating between the two layers of PET substrate films, and performing pressing to form a three-in-one film; and S3, thermal curing: heating and curing the pressed three-in-one film to obtain the light diffusion film with high haze and high transmittance. According to the preparation method, the liquid crystal liquid drops are adopted to replace traditional light diffusion particles, the problems that the light diffusion particles are prone to agglomeration, incident light is lost and the like are solved, and the prepared polymer dispersed liquid crystal film has high haze and high light transmittance (compared with an existing diffusion film adopting the light diffusion particles); and the light diffusion film with different optical properties (light transmittance and haze) can be obtained by changing the content of the liquid crystal.

Description

technical field [0001] The invention relates to a preparation method of a light diffusion film. Background technique [0002] Currently, liquid crystal displays (LCDs) are widely used in various fields, especially in the field of information technology, such as notebook computers, televisions, handheld game consoles, mobile phones, etc. Liquid crystal displays (LCDs) have become the most commonly used display technology today. Traditionally, LCD is non-self-luminous, and the light-emitting diodes (LEDs) in the backlight unit (BLU) are multiple independent dense point light sources with high luminance, so the performance of the backlight will directly affect the LCD image quality. [0003] As an important part of the LCD backlight module, the light diffusion film can effectively solve the problem of high light intensity of the LCD. It is used to improve the uniformity of illumination and expand the viewing angle. High brightness surface light source. When the light passes ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/02G02F1/13357
CPCG02B5/0268G02B5/0242G02F1/1336G02F1/133606
Inventor 罗培栋华雨莎王梦娜
Owner NINGBO DXC NEW MATERIAL TECH
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