METHOD FOR PRODUCING FOAMABLE COLORED RESIN PARTICLE

摘要

PROBLEM TO BE SOLVED: To obtain foamable colored resin particles which gives foamed moldings free from the unevenness of a color and exhibiting the color in a sufficient concentration. SOLUTION: This method for producing the foamable colored resin particles, comprises impregnating thermoplastic resin particles with a dye and an easily evaporable foaming agent in an aqueous dispersion containing the thermoplastic resin particles dispersed therein. The dye is impregnated in the presence of a nonionic surfactant having a weight-average mol.wt. of >=6,500.