| 摘要 |
Disclosed is a method for manufacturing an injection-molded foamed article, the method comprising the steps of: melt-kneading a thermoplastic resin and a chemical foaming agent in a cylinder of an injection unit, injecting the melt-kneaded thermoplastic resin from the cylinder into a cavity of a mold, and cooling and solidifying the thermoplastic resin injected in the cavity, wherein at least one of conditions (1) and (2) given below is satisfied: Mp+35° C.<=T<=Mp+115° C. and gamma>=1800 sec-1 (1)wherein Mp denotes the melting point (° C.) of the thermoplastic resin, T denotes the molding temperature (° C.) and gamma denotes the shear rate (sec-1) of the thermoplastic resin during its filling into the cavity at the molding temperature T; Tm>=Mp-105° C. (2)wherein Tm denotes a mold temperature (° C.), and Mp has the same meaning as above.
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