METHOD FOR PREPARING EXPANDABLE POLYSTYRENE TYPE RESIN PARTICLES

摘要

A method for preparing foamable styrenic resin particles containing charcoal is provided to ensure excellent heat insulation property due to a low heat conductivity at a low density, and to impart various effects favorable to the human body, including filtration and humidity-controlling effects. A method for preparing foamable styrenic resin particles containing charcoal comprises the steps of: (a) introducing a styrenic resin and charcoal into an extruder; (b) mixing the styrenic resin with charcoal while melting the styrenic resin at 200 deg.C or higher; (c) introducing a foaming agent to the mixture at 120-180 deg.C, followed by mixing; (d) cooling the mixture to 60-130 deg.C and ejecting the mixture through an extrusion die plate; and (e) granulating the ejected foamable polystyrene.