Foaming light diffusion plate and preparation method and application thereof

Abstract

The invention relates to the field of diffusion plates, in particular to a foaming light diffusion plate and a preparation method and application thereof. Compared with a chemical foaming agent, supercritical fluid is used for foaming to prepare the light diffusion plate, residues of toxic substances cannot be caused, meanwhile, the prepared light diffusion plate has excellent optical performance by controlling the introduction rate of the supercritical fluid, gathered point light sources can be homogenized, and the light diffusion plate has excellent haze; the maximum haze can reach 99.6%, the soft and uniform lighting effect can be achieved, meanwhile, the high light transmittance is achieved, the maximum light transmittance can reach 52.6%, and too high light loss cannot be caused; besides, the mass of the light diffusion plate is effectively reduced, the usage amount of raw materials is reduced, the production cost is reduced, meanwhile, the better mechanical strength is maintained, and the light diffusion plate has good impact resistance, smoothly passes an IK03 test and is wide in application prospect.

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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