METHOD OF REDUCING ODOR OF COMPOSITE RESIN PARTICLES, AND COMPOSITE RESIN PARTICLES

摘要

A method of reducing the odor of composite resin particles for molded-foam production therefrom that comprise a polyolefin resin and a polystyrene resin, the method comprising causing the composite resin particles to flow within a vessel by means of a gas that is blown thereinto from a lower part of the vessel and has a temperature of (T-40)ºC to (T-10)ºC (T is the softening temperature of the composite resin particles) and thereby reducing the odor derived from starting materials for the composite resin particles and from the production process. The composite resin particles thus reduced in odor satisfy the following: when a blowing agent is infiltrated into the composite resin particles and the particles are then pre-expanded and subsequently molded within a mold to obtain molded foam, then the molded foam has an odor intensity of 3 or less on average in an odor test in which the odor of isovaleric acid diluted 100,000 times, as a reference odor, is rated as 3 of ratings 0 to 5.