Patent ID: 9018269
Filing Date: 2015-04-28
Classification: B29C,C08J,Y10T

Abstract:
1. A process for producing expanded polyolefin resin particles with use as a foaming agent of water contained in an aqueous dispersion medium, the process including the steps of: dispersing polyolefin resin particles together with the aqueous dispersion medium into a closed vessel; heating the polyolefin resin particles up to or above a softening temperature of the polyolefin resin particles and pressurizing the polyolefin resin particles; and releasing the polyolefin resin particles into a zone whose pressure is lower than an internal pressure of the closed vessel, the polyolefin resin particles being composed of a polyolefin resin composition comprising: polyolefin resin; polyvalent alcohol in not less than 0.05 parts by weight to not more than 2 parts by weight to 100 parts by weight of the polyolefin resin, the polyvalent alcohol having a carbon number of not less than 3 to not more than 6 and three or more hydroxyl groups; and a foam nucleating agent.