METHOD FOR MOLDING USING THERMOPLASTIC RESIN AND FOAMING AGENT AND MOLDED PRODUCT OBTAINED BY THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a method for molding capable of obtaining a molded product having an excellent surface appearance. SOLUTION: (1) The method for injection molding uses a thermoplastic resin and 0.1 to 10 pts.wt. of the foaming agent (A) containing 0.01 to 0.5 molar ratio of carbon dioxide to 1 of nitrogen, to 100 pts.wt. of the thermoplastic resin. (2) The method for injection molding uses the thermoplastic resin and 0.1 to 10 pts.wt. of the foaming agent (B) containing 0.01 to 0.5 molar ratio of carbon dioxide to 1 of nitrogen, to 100 pts.wt. of the thermoplastic resin so that a molar ratio of a sodium hydrogen carbonate of the foaming agent for generating carbon dioxide to a citric acid or a monosodium citrate is 1:0.06 to 0.8. COPYRIGHT: (C)2003,JPO