POLY PROPYLENE COMPOSITION FOR INJECTION FOAMING MOLDING WITH SUPERCRITICAL FLUID

摘要

PURPOSE: A polypropylene resin composition is provided to be useful for foam injection molding, to prevent shrinkage phenomenon, and to increase the thickness of a dog house. CONSTITUTION: A polypropylene resin composition for injection molding using a supercritical fluid, using a supercritical fluid as a foaming agent comprises a propylene-ethylene block copolymer which consists of a propylene homopolymer and propylene-ethylene random copolymer rubber; an ethylene-propylene block copolymer which consists of an ethylene-propylene random copolymer or ethylene-propylene random copolymer and ethylene-propylene copolymer rubber; an elastomer of ethylene-olefin random copolymer; and inorganic filler. [Reference numerals] (AA) Example 1; (BB) Comparative example 1; (CC) Comparative example 2