Patent ID: 7897092
Filing Date: 2011-03-01
Classification: B29C

Abstract:
1. A process for the production of a non-foamed molded body, comprising: impregnating particles of an amorphous thermoplastic resin selected from the group consisting of polystyrene base resins, polycarbonate base resins, polymethacrylates resins, cycloolefin base resins, and mixtures thereof with 3 to 10% by mass of carbon dioxide and/or 0.05 to 1.0% by mass of nitrogen in a pressure vessel at a temperature of from 0 to 100° C. but not higher than the glass transition temperature of the amorphous thermoplastic resin to provide impregnated particles, mixing the impregnated particles with particles of the amorphous thermoplastic resin not impregnated with carbon dioxide or nitrogen to provide a mixture of particles having 0.3 to 3.0% by mass of carbon dioxide and/or 0.05 to 1.0% by mass of nitrogen, and supplying the mixture of particles to a raw material supplying port of an uppermost stream part of a cylinder in an injection molding machine and molding said mixture to provide a non-foamed molded body.