PRE-EXPANDED POLYPROPYLENE RESIN PARTICLE AND MOLDED OBJECT OBTAINED BY IN-MOLD EXPANSION

Title:

PRE-EXPANDED POLYPROPYLENE RESIN PARTICLE AND MOLDED OBJECT OBTAINED BY IN-MOLD EXPANSION

Document Type and Number:

WIPO Patent Application WO/2006/075491

Kind Code:

A1

Abstract:

An in-mold expanded molding which has a highly beautiful surface and high rigidity. It is obtained using a molding machine of the common type having a withstand pressure of 0.4 MPa. Also provided are pre-expanded polypropylene resin particles comprising as the base resin a resin having an MFR of 5-20 g/10 min and a melting point of 140-155°C and satisfying the following relationship. The pre-expanded polypropylene resin particles are molded to give the in-mold expanded molding. [quantity of heat of crystal fusion (J/g)]≥1.2×[melting point (°C)]-96

Inventors:

KIGUCHI TARO (JP)
IWAMOTO TOMONORI (JP)

Application Number:

PCT/JP2005/023475

Publication Date:

July 20, 2006

Filing Date:

December 21, 2005

Export Citation:

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Assignee:

KANEKA CORP (JP)
KIGUCHI TARO (JP)
IWAMOTO TOMONORI (JP)

International Classes:

C08J9/18; B29C44/00; C08J9/232

Foreign References:

JPH11505868A	1999-05-25
JPH11147972A	1999-06-02
JPH03152136A	1991-06-28
JPH03254930A	1991-11-13
JP2004175819A	2004-06-24
JPH10316791A	1998-12-02
JP2005298769A	2005-10-27

Other References: