| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a polypropylene-based resin composition whose transparency and impact resistance are simultaneously improved with a good balance and that has such an excellent property that its rigidity decrease is very low and whose impact resistance is hardly decreased by γ-ray irradiation and that is cheap, and to provide an outer cylinder of a syringe made of the resin composition. <P>SOLUTION: The polypropylene-based resin composition is produced by further control of total MFR(230°C) at 25-40 g/10 min by an added peroxide-induced thermal decomposition of a resin composition comprised of a 100 pts.wt. resin mixture, that comprises a 97-99.6 wt% polypropylene(A) whose MFR(230°C) is 4-20 g/10 min and ethylene content is 3.6-4.2 wt% and an 0.4-3 wt% ethylene/6-8C-α-olefin copolymer(B) whose MFR(190°C) is 2-6 g/10 min and density is not more than 0.850-0.870 g/cm<SP>3</SP>, and a 0.05-0.5 pts.wt. specified nucleus forming agent, and the outer cylinder of the syringe is made of the resin composition. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
