PREPARING METHOD OF LIGHT DIFFUSION COVER USING COEXTRUSION FOR LED LIGHTING DEVICE

摘要

The present invention relates to a method for manufacturing a light diffuser plate using double extrusion and, more specifically, to a method for manufacturing a light diffuser plate using double extrusion, which has a high light diffusion rate, high transmittance, and a high definition surface shape without a decrease in lighting efficiency by controlling the surface shape of a lighting fixture to ensure the price competitiveness according to an increase in lighting efficiency of the LED lighting. The method for manufacturing the light diffuser plate using double extrusion comprises the following steps: drying a foamable spherical light diffuser filler and a resin pellet; uniformly mixing the dried light diffuser filler and resin pellet; and allowing a final product to be foamed as the pressure is lowered, by adding the mixture to a shell portion in the double extrusion when performing the double extrusion on the light diffuser plate. In addition, a particle of the light diffuser filler consists of a thermo-expandable polymer bead to be foamed after the double extrusion.