POLYAMIDE-BASED RESIN COMPOSITION FOR INJECTION FOAMING, AND INJECTION FOAM MOLDING

摘要

PROBLEM TO BE SOLVED: To provide a polyamide-based resin composition for injection foaming capable of obtaining an injection foam molding having a high expansion ratio, uniform cells and excellent impact resistance with high formability.SOLUTION: A polyamide-based resin composition for injection foaming includes a polyamide resin (A) with a relative viscosity measured on conditions of 96% sulfuric acid as a solvent at a temperature of 25°C at a concentration of 1 g/100 ml being in a range of 2.0-4.0, and a polytetrafluoroethylene-containing resin (B). A content of the polytetrafluoroethylene-containing resin (B) with respect to 100 pts.wt. of the polyamide resin (A) is 0.05-3 pts.mass. A strain hardening coefficient measured at a temperature obtained by adding 10°C to the melting point of the resin composition is 1.05-10.SELECTED DRAWING: Figure 1