| 摘要 |
<p>A method of injection molding of a thermoplastic resin which comprises dissolving carbon dioxide into a molten resin in an amount sufficient to improve fluidity, filling a mold cavity with the resultant molten resin having carbon dioxide while allowing to foam at the flow front of the molten resin, and then pressuring the resin in the mold cavity with a pressure sufficient not to foam or more. The method can be employed, in the injection molding using a molten resin having carbon dioxide dissolved therein as a plasticizer, for dissolving carbon dioxide in an amount so as to satisfactorily improve the fluidity of the molten resin to thereby greatly improve the fluidity of the molten resin and at the same time preparing unfoamed moldings.</p> |
