According to the effects of different processing processes on the properties of the composites, the optical properties and process stability of the three kinds of composites were studied by direct addition method, single-screw master batch method and twin-screw master batch method.
This chapter discusses the preparation of LDA masterbatch by using light diffusion agent and polycarbonate as raw materials, and the preparation and properties of photodiffusion composite. Through the type of light diffusion agent and the filling amount of light diffusion agent, the effect of light diffusion agent on the composites was studied.
Commonly used light diffusers include inorganic particles such as TiO2, BaSO4, SiO2, CaCO3, Al2O3, and glass beads, as well as organic polymer particles such as PS and silicone resin.
Then,how to chose the Light Diffusion Materials?
LED is a point light source. In practical applications, it is usually necessary to transform it into a line light source or a surface light source to make the light bright and soft. To achieve this transformation, it is inseparable from an indispensable light diffusion material. Light diffusion materials are generally composed of light diffusion agent and polymers, which are supplied to the market in the form of light diffusion plastics, light diffusion encapsulant, light diffusion coating and ink. How’s the dosage ratio and particle size of light diffusion agent affect the effect of light diffuser? let’s discuss together
when the organic silicon light diffusion agent dosage was 0.6%~0.8%, the inorganic optical diffusion agent was 0.15%, the transmittance reached (43±3) %, the fog degree was up to 99.4%.
The optical properties of the materials are determined by the amount of light diffusion agent, particle size and distribution, and refractive index. The indexes to evaluate the optical properties of light diffusion materials include full light transmittance, haze, and dispersion. The degree of dispersion refers to the angle at which the relative transmittance is 50%. How to achieve high transmittance and haze of astigmatic materials ?
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