POLYPROPYLENE RESIN COMPOSITION AND CONTAINER

摘要

PROBLEM TO BE SOLVED: To provide a polypropylene resin composition which has its clarity and impact resistance simultaneously improved in a good balance and is suitable for producing a container. SOLUTION: This composition is prepared by compounding 100 pts.wt. resin comprising 70-90 wt.% polypropylene having an MFR(melt flow rate) of 4-50 and 10-30 wt.% ethylene/6-20Cα-olefin copolymer having an MFR of 0.5-40 and a density of 0.890-0.915 with 0.1-0.3 pt.wt. organic phosphate nucleating agent. Preferably, the ratio (G'/G") of storage modulus (G') to loss modulus (G") in the dynamic viscoelasticity measurement of this composition is 0.5 or higher when the angular velocity is 0.1 rad/s and is 1 or higher when the angular velocity is 10 rad/s or higher.