Title:
POLYPROPYLENE-BASED RESIN PRE-EXPANDABLE BEADS, METHOD FOR PRODUCING THE SAME, AND IN-MOLD EXPANSION-MOLDED FORM
Document Type and Number:
Japanese Patent JP2009126914
Kind Code:
A
Abstract:
To provide polypropylene-based resin pre-expandable beads capable of giving, under a heating steam pressure lower than ever, a hard-to-crack in-mold expansion-molded form excellent in the neatness of both the surface and thin-walled part, and seldom causing inside fall even after short-time drying in a box-type shape in particular tending to cause inside fall.
The polypropylene-based resin pre-expandable beads are provided, whose base resin comprises a polypropylene-based resin composition comprising 100 pts.wt. of a polypropylene-based resin, 1-5 pts.wt. of an -olefin-propylene copolymer rubber and 1-20 pts.wt. of a petroleum resin and/or a terpene resin.
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Inventors:
YONEDA YOSHIMI
Application Number:
JP2007301921A
Publication Date:
June 11, 2009
Filing Date:
November 21, 2007
Export Citation:
Assignee:
KANEKA CORP
International Classes:
C08J9/18; C08J9/232; C08K3/06; C08L23/10; C08L23/14; C08L57/00
Domestic Patent References:
JPH06293082A | 1994-10-21 | |||
JP2003147115A | 2003-05-21 | |||
JP2004238612A | 2004-08-26 | |||
JPH10251436A | 1998-09-22 | |||
JPH10251437A | 1998-09-22 | |||
JP2005008850A | 2005-01-13 | |||
JPH05186630A | 1993-07-27 | |||
JP2005298769A | 2005-10-27 |