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A light guide plate with high light transmittance and its preparation method

A high light transmittance, light guide plate technology, applied in the field of light guide plates, can solve the problems of not meeting the needs of display technology, affecting product efficacy and quality, and prone to expansion changes in volume, achieving excellent light transmittance, improving refraction, Use effects with small deformation rates

Active Publication Date: 2020-10-16
苏州亿光源光电科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Acrylic sheet includes extrusion molding and casting molding technology. As users have higher and higher requirements for terminal display performance, the traditional light guide plate injection molding process can no longer meet the needs of display technology due to problems such as uneven thickness and yellowing of the light guide plate. needs
Moreover, most of the existing light guide plates have a light transmittance of about 90%, and there is still room for improvement. At the same time, the existing light guide plates have poor toughness, high damage rate, inconvenient installation and use, and work under long-term high temperature conditions. The volume is prone to expansion and change, which greatly affects the efficacy and quality of the product

Method used

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  • A light guide plate with high light transmittance and its preparation method

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Effect test

Embodiment 1

[0018] A light guide plate with high light transmittance, comprising the following components in mass percentage: PC 15%, silane coupling agent 3.2%, modified silicon dioxide 6%, light stabilizer 0.5%, compatibilizer 0.8%, organic Tin compound 0.8%, PMMA balance.

[0019] The silane coupling agent is a combination of vinyltriethoxysilane and aminosilane coupling agent, the mass ratio of which is 1:0.5, wherein the aminosilane coupling agent is γ-aminopropyltrimethoxysilane.

[0020] The organotin compound is a composition of dimethyltin and dibutyltin with a mass ratio of 1:1.

[0021] The modified silicon dioxide is metal-containing modified silicon dioxide, the metal is a combination of Cu and Ag, and the metal doping amount is 0.5% of the total mass of the modified silicon dioxide. The preparation steps of the modified silicon dioxide are as follows: Fused spherical silica micropowder with a particle size distribution of 50-60μm, add it to polyvinyl alcohol aqueous solutio...

Embodiment 2

[0024] A light guide plate with high light transmittance, comprising the following components in mass percentage: PC 20%, silane coupling agent 3.5%, modified silicon dioxide 2%, light stabilizer 0.8%, compatibilizer 1.2%, organic Tin compound 2.4%, PMMA balance; also includes silicone 4%, cellulose triacetate 6%.

[0025] The silane coupling agent is a combination of vinyltriethoxysilane and aminosilane coupling agent, the mass ratio of which is 1:0.6, wherein the aminosilane coupling agent is selected from γ-aminopropyltrimethoxysilane.

[0026] The organic tin compound is a composition of dimethyl tin and dibutyl tin with a mass ratio of 1:0.6.

[0027] The modified silicon dioxide is metal-containing modified silicon dioxide, the metal is a composition of Cu and Al, and the metal doping amount is 1% of the total mass of the modified silicon dioxide. The preparation steps of the modified silicon dioxide are as follows: Fused spherical silica micropowder with a particle siz...

Embodiment 3

[0030] A light guide plate with high light transmittance, comprising the following components in mass percentage: PC 18%, silane coupling agent 3%, modified silicon dioxide 4%, light stabilizer 1%, compatibilizer 1%, organic Tin compound 3%, PMMA balance; also includes silicone 3%, cellulose triacetate 4%.

[0031] The silane coupling agent is a combination of vinyltriethoxysilane and aminosilane coupling agent, the mass ratio of which is 1:0.8, wherein the aminosilane coupling agent is anilinomethyltrimethoxysilane.

[0032] The organic tin compound is a composition of dimethyl tin and dibutyl tin with a mass ratio of 1:0.5.

[0033]The modified silicon dioxide is metal-containing modified silicon dioxide, the metal is a composition of Ag and Al, and the metal doping amount is 1.5% of the total mass of the modified silicon dioxide. The preparation steps of the modified silicon dioxide are as follows: Fused spherical silica micropowder with a particle size distribution of 50-...

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Abstract

The invention provides a high-transparency light guide plate and a preparation method thereof. The light guide plate comprises, in weight percent, 15-20% of PC (polycarbonate), 2-3.5% of silane coupling agents, 2-10% of modified silicon dioxide, 0.4-1% of light stabilizers, 0.5-1.2% of compatilizers, 0.5-3% of organic tin compounds, the balance PMMA (polymethyl methacrylate), 2-5% of silicone and3-8% of cellulose triacetate. By the aid of reasonable raw material selecting and blending and process improvement, the prepared light guide plate has excellent transparency, refractivity and toughness and is low in service deformation rate, and the service life of the light guide plate is remarkably prolonged.

Description

technical field [0001] The invention relates to the technical field of light guide plates, in particular to a light guide plate with high light transmittance and a preparation method thereof. Background technique [0002] The existing light guide plate uses optical grade acrylic / PC board, and then uses high reflectivity and non-light-absorbing high-tech materials to print light guide points on the bottom surface of the optical grade acrylic board with UV screen printing technology. The optical-grade acrylic plate is used to absorb the light emitted from the lamp to stay on the surface of the optical-grade acrylic plate. When the light hits each light guide point, the reflected light will spread to all angles, and then destroy the reflection condition and be emitted from the front of the light guide plate. Through light guide points of various densities and sizes, the light guide plate can be made to emit light evenly. The purpose of the reflector is to reflect the light exp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L33/12C08L69/00C08L83/04C08L1/12C08K13/06C08K9/02C08K9/04C08K9/06C08K3/36
CPCC08L33/12C08L2205/035C08L69/00C08K13/06C08K9/02C08K9/08C08K9/06C08K3/36C08L83/04C08L1/12
Inventor 杨为新
Owner 苏州亿光源光电科技股份有限公司
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