COMPOSITION OF POLYPROPYLEN RESIN HAVING LOW SHRINKAGE AND DIEMSIONALSTABILITY

摘要

PURPOSE: A polypropylene composite resin composition is provided to improve rigidity, shock resistance balance and plane impact, to express low shrinkage and low linear expansion coefficient, and to be used as an instrument panel and a material for replacing other built-in parts. CONSTITUTION: A polypropylene composite resin composition for vehicle interiors comprises: propylene polymer 35~75 parts by weight with a melting flow index of 0.5~100 g/10 minute; a hybrid ethylene-α-olefin copolymer 5~30 parts by weight mixed with an ethylene-propylene copolymer rubber and an ethylene-α-olefin copolymer; a polypropylene elastomer 5~35 parts by weight; an inorganic filler 0~40 parts by weight; and a polar group-introduced modified polypropylene 0~5 parts by weight.