COMPOSITION OF CELLULAR PHONE CASE FOR BLOCKING ELECTRONIC WAVE AND ITS PREPARATION PROCESS

摘要

PURPOSE: A composition of cellular phone case for blocking electronic wave and its preparation process are provided to maximize the effects of inhibiting wrong operation of a cellular phone and blocking electronic wave and to reduce a product cost which results from a simplification of preparation process and a reduction of material cost, as well as to double an antimicrobial function. CONSTITUTION: The process comprises the following steps of: quantitatively introducing an electronic wave absorber(Mn-Zn-, Ni-Zn-, Mg-Zn-, Mg-Zn-Cu-ferrite, etc.) having a particle size of 0.1-30 micro meter in an amount of 10-30 weight% to synthetic resin material for making a cellular phone case(PC(Polycarbonate), PC(Polycarbonate)/ABS(Acrylonitrile Butadiene Styrene) blends, ABS(Acrylonitrile Butadiene Styrene)) of 90-70 weight%; hot extruding the blend at a temperature of 180-315 deg.C to obtain a pellet resin; and injection molding the obtained pellet resin into a cellular phone case.