The propylene resin for the medical application syringe and ejecting forming this, the polypropylene resin where the medical application syringe

摘要

PROBLEM TO BE SOLVED: To provide polypropylene resin composition having superior rigidity, heat resistance, transparency and impact resistance and attaining high productivity, and a medical instrument formed of the polypropylene resin composition.;SOLUTION: The polypropylene resin is composed of a propylene homopolymer having (i) a melt flow rate (ASTM D 1238, 230C, 2.16 kg load) of 10-60 g/10 minutes, (ii) a meso pentad fraction (mmmm) of 0.920-0.950, and (iii) a molecular weight distribution (Mw/Mn) of 2.0-5.6, and not subjected to molecular weight reducing adjustment by a peroxide. This medical syringe is obtained by injection-molding the polypropylene resin, and this prefilled syringe preparation is obtained by filling the medical syringe with a medical solution with a pH of 5.0-9.0.;COPYRIGHT: (C)2008,JPO&INPIT