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Light guide plate and preparation process thereof

A preparation process and technology of light guide plate, applied in the field of optical transmission, can solve the problems of high temperature resistance, yellowing of PS materials, affecting the service life of products, etc., and achieve the effects of soft light, slowing down brightness difference, and inhibiting yellowing

Pending Publication Date: 2021-12-17
绍兴明优光电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] PS material is often used in the optical industry on the market because of its good light transmission. It can be used to manufacture optical glass and optical instruments, as well as transparent or brightly colored ones, such as lampshades and lighting appliances. Due to the defect that the PS material itself is not resistant to high temperature, continuous lighting in a high temperature and strong oxidizing working environment, or when it is used outdoors, will cause rapid yellowing of the PS material, which will seriously affect the quality of the product. service life

Method used

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  • Light guide plate and preparation process thereof
  • Light guide plate and preparation process thereof
  • Light guide plate and preparation process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Embodiment one: if Figure 1 to Figure 3 As shown, a light guide plate includes a substrate 1 integrally extruded, one side of the substrate 1 is recessed to form light guide ribs 2 distributed in an array in the form of regular polygonal pyramids, and adjacent light guide ribs 2 are formed with Diffusion point 3 with diamond-shaped cross section, content of substrate 1 by weight percentage includes:

[0053] Polystyrene 94.5-97.5%;

[0054] Light shielding agent 2-4%;

[0055] Antioxidant 0.1-0.5%;

[0056] Anti-yellowing agent: 0.2-0.8%;

[0057] Light guide powder: 0.1-0.3%;

[0058] Colorant: 0.1-0.2%.

[0059] Polystyrene is made of general polystyrene material (GPPS), and the light shielding agent is nano-inorganic titanium dioxide after drying. Specifically, the nano-inorganic titanium dioxide is dried by heat-insulating pad microwave drying technology, and the antioxidant is Ethylene bis(oxyethylene)bis[3-(5-tert-butyl-4-hydroxy-m-tolyl)propionate], the an...

Embodiment 2

[0063] Embodiment 2: A preparation process of a light guide plate, which is used to prepare a light guide plate as in Embodiment 1, and the steps include:

[0064] 1) Weighing, weighing the raw materials according to the ratio;

[0065] 2) mixing, putting the raw materials into the mixer for stirring, and preheating the mixed raw materials;

[0066] 3) Hot melting, the mixed and preheated raw materials are transported to the screw extruder through the vacuum feeder, melted and blended, the temperature is controlled at 180-200°C, and the screw speed is 100-300r / min;

[0067] 4) Die adjustment, adjust the specifications of the extrusion die head according to the thickness and width of the plate required by the customer, adjust the opening size of the extrusion die head through the cylinder or hydraulic cylinder through the stroke controller, and extrude a plate larger than 10 cm as a sample;

[0068] 5) Forming, when measuring the extruded sheet and sewing the specifications re...

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Abstract

The invention discloses a light guide plate and a preparation process thereof, relates to an optical conduction technology, and aims to solve the problem that the service life of a product is seriously influenced due to the fact that a PS (polystyrene) material is quickly yellowed in a working environment with higher temperature and stronger oxidizability. The main points of the technical scheme are that the light guide plate comprises a substrate formed through integral extrusion molding, one side of the substrate is sunken to form light guide ridge parts which are distributed in an array and are in a regular polygonal pyramid shape, and diffusion points with rhombic sections are formed between the adjacent light guide ridge parts. The anti-yellowing agent is added into the raw materials of the substrate, so the yellowing condition of the substrate when the substrate is heated for a long time is inhibited, a small amount of coloring agent and light guide powder are added in a matched mode, the light guide effect of the light guide plate can be improved, and light passing through the light guide plate is softer and more uniform; and the hot-melt raw materials are firstly dried, so that the generation of bubbles during hot-melt extrusion can be reduced.

Description

technical field [0001] The invention relates to optical transmission technology, more specifically, it relates to a light guide plate and its preparation process. Background technique [0002] The light guide plate is made of optical-grade acrylic / PC / PS sheet, and then high-tech materials with extremely high refractive index and non-absorbing light are used to engrave the bottom surface of the optical-grade acrylic sheet with laser engraving, V-shaped cross grid engraving, and UV screen. Printing technology prints light guide dots. 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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L25/06C08K13/02C08K3/22C08K5/18C08K5/526C08K5/13C08K5/134B29C48/07B29C63/02G02B6/00
CPCC08K13/02C08K3/22C08K5/18C08K5/526C08K5/13C08K5/1345B29C48/07B29C63/02G02B6/004G02B6/0065C08K2003/2241C08L25/06
Inventor 李书培
Owner 绍兴明优光电科技有限公司
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