Sumitomo Chemical Company, Limited

Kouichirou Asao

Tadashi Sakurai

Akinobu Sakamoto

The present invention relates to a polypropylene resin composition containing about 90 to 60 parts by weight of a polypropylene block copolymer (A); and about 10 to 40 parts by weight of a polyethylene resin (B), wherein the polypropylene block copolymer is a polypropylene block copolymer which contains about 99 to 90% by weight of a crystalline polypropylene (a) and about 1 to 10% by weight of an amorphous ethylene-.alpha.-olefin copolymer (b) and has a melt flow rate (MFR) of about 2 to 15 g/10 minutes, and a die swell ratio, measured by a capillary rheometer, of at least 1.7. Foamed materials containing a fine and uniform foam are obtainable from this composition.

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Osaka, Japan

Kouichirou Asao