METHOD AND DEVICE FOR PRE- EXPANDING THERMOPLASTIC MICROSPHERES AND AN EXPANSION DEVICE THEREOF
Application 1342/CHENP/2005 published 2007-08-24, filed 2005-06-20
The present invention relates to a method of preparing expanded thermoplastic microspheres, comprising charging thermally expandable microspheres into an expansion device (6) comprising rotating feeding means (8) enveloped by a hollow body, and one or more scrapers (9). The invention further relates to an expansion device for expanding thermoplastic microspheres.
Applicant
1)AKZO NOBEL N.V.
: P.O. Box 9300, NL-6800 SB ARNHEM Netherlands
Inventor
1)SVEDBERG, Lars-Olof 2)HOVLAND, Guy 3)HOLMLUND, Thomas
International Info
Classification: B29C 44/34
Publication Number: WO/2004/056549
Application Date: 2003-12-18
Priority Information
02445192.4 EUROPEAN UNION 2002-12-20