Patent Number: 6,166,096

Title: Pre-expanded particles of polypropylene resin, process for producing the same and process for producing in-mold foamed articles therefrom

Abstract: A pre-expanded particle made of a blend of 10 to 90% by weight of a polypropylene resin having a melt index of 6 to 10 g/10 minutes and 90 to 10% by weight of a polypropylene resin having a melt index of 0.5 to 3 g/10 minutes. The melt index of the blend being within the range of 2 to 5 g/10 minutes. The pre-expanded particles can be molded by an in-mold foaming method in a short time without causing sink to give polypropylene resin cellular molded articles having good surface property and good melt adhesion of the particles.

Inventors: Ichimura; Tadayuki (Settsu, JP), Nakamura; Kyoichi (Settsu, JP), Senda; Kenichi (Settsu, JP)

Assignee: Kaneka Corporation

International Classification: C08L 23/00 (20060101); C08J 9/00 (20060101); C08J 9/18 (20060101); C08J 9/232 (20060101); C08L 23/10 (20060101); C08J 009/232 (); C08J 009/22 ()

Expiration Date: 12/26/2013