Foamed light diffusion plate and its preparation method and application

Abstract

The invention relates to the field of diffusion plates, in particular to a foamed light diffusion plate and its preparation method and application. The present invention uses supercritical fluid for foaming to prepare the light diffusion plate. Compared with chemical foaming agents, no toxic substances will be left. At the same time, the prepared light can be diffused by controlling the feed rate of supercritical fluid. The board has excellent optical performance, can evenly light the gathered point light sources, has excellent haze, up to 99.6%, can achieve soft and uniform lighting effects, and has high light transmittance, the highest It can reach 52.6%, without causing excessive light loss; in addition, it also effectively reduces the quality of the light diffusion plate, reduces the amount of raw materials used, and reduces production costs, while maintaining excellent mechanical strength and good impact resistance Performance, successfully passed the IK03 test, and has broad application prospects.

Description

technical field [0001] The invention relates to the field of diffusion plates, in particular to a foamed light diffusion plate and its preparation method and application. Background technique [0002] The light diffusion plate is widely used in liquid crystal display and LED lighting. When the light passes through the light diffusion plate, physical phenomena such as refraction, reflection and scattering will occur, so that the point light source can be transformed into a surface light source to achieve a soft and uniform lighting effect. . The traditional diffusion plate mainly achieves the uniform light effect by diffusing particles or surface microstructures, but it is often heavy, which increases the manufacturing cost and limits the use scenarios. [0003] In order to reduce the weight of the light diffusion plate, people began to try to manufacture a light diffusion plate with cells in the plate, but in the prior art, chemical foaming agents such as azodicarbonamide w...

AI Technical Summary

Problems solved by technology

The traditional diffusion plate mainly achieves uniform light effect by diffusing particles or surface microstructure, but it is often heavy, which increases the manufacturing cost and limits the usage scenarios

[0003] In order to reduce the weight of the light diffusion plate, people began to try to manufacture a light diffusion plate with cells in the plate, but in the prior art, chemical foaming agents such as azodicarbonamide were often used for foaming, which not only easily left harmful chemical reagents, Moreover, it is difficult to control the cell diameter and the density of the final plate within an appropriate range, resulting in an unbalanced and stable performance in terms of optical properties (light transmittance, haze, etc.) and mechanical properties (impact resistance, etc.)

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