| 摘要 |
PROBLEM TO BE SOLVED: To provide a polypropylene-based resin composition forming expansion-molded products excellent in balance of expandability and productivity and also excellent in thermoformability, and to provide molded products thereof. SOLUTION: The polypropylene-based resin composition comprises following (A) and (B). (A): 10-50 wt.% polyolefin component having branched structure and 5-30 g melt tension at 230°C, (B): 90-50 wt.% polypropylene-based resin satisfying following (B-1) to (B-4), (B-1) 0.5-5 g melt tension at 190°C, (B-2) 1-10 g/10min melt flow rate, (B-3) 2-4.5 ratio of weight-average molecular weight to number-average molecular weight, and (B-4) 0.5-2.0 s relaxation time (τ) at angular frequencyω=0.1 rad/s and of melt viscoelasticity behavior measured by using a rotary rheometer. COPYRIGHT: (C)2006,JPO&NCIPI
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