| 摘要 |
PROBLEM TO BE SOLVED: To provide a technique which decreases washout of a cationic antistatic agent when a preliminary foamed particle contacts steam and allows a low cost obtaining of a foamed molding excellent in antistatic properties. SOLUTION: The production process of an antistatic thermoplastic resin foamed molding is characterized by performing an in-mold foam molding while setting an opening rate between 0.5-1.0%, wherein the opening rate is the ratio of a vent hole opening area to an area of molding face to which the foamed molding in a molding die contacts; provided that the production process of the foamed molding is performed by; containing a foaming agent in a thermoplastic resin particle, preparing a foaming thermoplastic resin particle which adheres a cationic antistatic agent on at least its particle surface, producing the preliminary foamed particle by heating and foaming the foaming thermoplastic resin particle, thereafter filling the preliminary foamed particle in a cavity of a molding die having the cavity corresponding to a desired molding configuration, heating by pouring steam in the cavity through a vent-hole of the molding die and producing the foamed molding by the in-mold foam molding which inflates and fuses the preliminary foamed particle. COPYRIGHT: (C)2010,JPO&INPIT |
