EXPANDABLE POLYSTYRENE-BASED COLORED RESIN PARTICLE, METHOD FOR PRODUCING THE SAME, COLORED RESIN PRE-EXPANDED PARTICLE AND COLORED RESIN EXPANSION MOLDED PRODUCT

摘要

PROBLEM TO BE SOLVED: To provide expandable polystyrene-based colored resin particles that easily produce uniformly colored expansion molded products without causing coloring unevenness and a method for producing the same.;SOLUTION: The expandable polystyrene-based colored resin particle includes Solvent Blue 78 as a dye in an expandable polystyrene-based colored resin particle colored with a dye. In the method for producing expandable polystyrene-based colored resin particles in which polystyrene-based particles are fed to a pressure-resistant container, a dye and a blowing agent are added to the container to impregnate the polystyrene-based resin particles with the blowing agent and the dye, the dye contains Solvent Blue 78 and the dye is pre-dispersed into an aqueous medium and fed to the container.;COPYRIGHT: (C)2012,JPO&INPIT