Apparatus and method for extruding foamed polymeric materials

Details Apparatus and method for extruding foamed polymeric materials Apparatus and method for extruding foamed polymeric materials

B - Operations, Transporting

29

C

18/661

B29C 47/64 (2006.01) B29C 44/34 (2006.01)

Patent

CA 1177211

ABSTRACT OF THE DISCLOSURE Cellular chlorinated polyvinyl chloride resin is made in an extruder that is characterized by a combination of multiple flights and a plurality of open slots in the mixing section to facilitate mixing of the resin and a blowing agent whereby a rigid thermoplastic cellular product of low density is made that has a predominantly closed cell structure.

403901

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