PROPYLENE RESIN COMPOSITION

摘要

PROBLEM TO BE SOLVED: To provide a propylene resin composition of new constitution reducing formation of flashes when used as a material for injection molding. SOLUTION: The propylene resin composition comprises a polypropylene resin (PP), an elastomer and an inorganic filler as main constituents. Characteristics of the PP satisfy requirements of≥0.90 infrared absorbance ratio (peak area at 998 cm-1/peak area at 973 cm-1) and≥10 Q value (Mw/Mn) obtained by GPC (gel permeation chromatography). Characteristics of the propylene resin composition are within the range satisfying formula (1) X ätotal amount (%) of soft components}<50, formula (2) Y äheat quantity of crystallization (mJ/mg) of rigid components}>95 and formula (3) Y<-2X+230. COPYRIGHT: (C)2005,JPO&NCIPI