POLYPROPYLENE RESIN COMPOSITION FOR HOLLOW MOLDING, METHOD FOR PRODUCING THE SAME, AND HOLLOW MOLDING

摘要

PROBLEM TO BE SOLVED: To provide a polypropylene resin composition for hollow molding excellent in rigidity and impact resistance (in particular, bottle impact strength) of an obtained hollow molding in addition to drawdown resistance during molding.;SOLUTION: A polypropylene resin composition for hollow molding contains a polypropylene resin containing a matrix formed from a propylene polymer and an ethylene-propylene copolymer, where an MFR at 230°C and 2.16 kg is 0.1-5.0 g/10 min, an intrinsic viscosity of a xylene soluble content of the polypropylene resin is more than 2.0 dl/g and 4.0 dl/g or less, a ratio (Mw/Mn) of a weight average molecular weight M_w and a number average molecular weight M_n of the xylene insoluble content is 6-20, a content ratio of the ethylene-propylene copolymer is 15-30 mass%, a content ratio of an ethylene unit in the propylene polymer is 1.0 mass% or less, and a content ratio of a propylene unit in the ethylene-propylene copolymer is more than 40 mass% and 70 mass% or less.;SELECTED DRAWING: None;COPYRIGHT: (C)2019,JPO&INPIT