| 摘要 |
PROBLEM TO BE SOLVED: To provide a polypropylene compsn. which has excellent mechanical strength and transparency, is less likely to become fragile upon radiation exposure and less likely to be colored and to provide a pharmaceutical for radiation sterilization and molding for medical applications comprising the polypropylene compsn. SOLUTION: This polypropylene compsn. comprises: 75 to 94wt.% polypropylene (A) having a content of an ethylene-derived unit of 2.5 to 6mol% and an MFR of 5 to 50g/10min; 5 to 15wt.% straight-chain, low-density polyethylene (B) having a density of 0.905 to 0.919g/cm<3> , a degree of crystallization of not less than 30%; 1 to 10wt.% ethylene/-1-butene copolymer (C) having a degree of crystallization of less than 30%; and, based on 100 pts.wt. in total of the components (A) to (C), 0.0001 to 0.05 polymer nucleating agent (D), 0.01 to 1.0 pts.wt. org. nucleating agent (E) having a mol.wt. of not more than 1,000, 0.01 to 1.0 pts.wt. org. phosphorus-based heat-resistant stabilizer (F), and 0.01 to 1.0 pts.wt. hindered amine photostabilizer (G). |
