B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
18/663
B29C 47/00 (2006.01) B29C 35/10 (2006.01) B29C 35/04 (2006.01) B29C 35/08 (2006.01)
Patent
CA 1286073
Abstract There is disclosed a polystyrenic foam having improved uniformity of properties across its cross-section. The method involves passing the just-extruded foam through a molding (or shaping) device which is heated or maintained at an elevated temperature rather than being cooled or uninsulated. It is further preferred to post-expand the resultant foam in hot air.
543626
Kadota Takao
Wakabayashi Masayuki
Smart & Biggar
The Dow Chemical Company
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