| 摘要 |
PURPOSE:To obtain an expandable thermoplastic resin particle capable of readily and finely dispersing a foaming agent in a resin, excellent in homogeneity and useful as expanded moldings, etc., by melt kneading prescribed amounts of a thermoplastic resin with the foaming agent and inorganic powder, extruding the resultant mixture through an extrusion hole of a die head into a pressurized liquid, cutting the extrudate and then cooling the cut extrudate. CONSTITUTION:The resin particle is obtained by melt kneading (A) 100 pts.wt. thermoplastic resin such as a styrenic resin with (B) preferably <=40 pts.wt. foaming agent such as n-butane and (C) <=1.5 pts.wt. inorganic powder such as talc, then extruding the resultant mixture through an extrusion hole of a die head into a pressurized liquid, instantaneously cutting the extrudate and subsequently cooling the cut extrudate. |
