B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
B29C 44/02 (2006.01) B29C 41/04 (2006.01) B29C 41/52 (2006.01) B29C 44/34 (2006.01) B29C 67/20 (2006.01) C08J 9/10 (2006.01)
Patent
CA 2300776
Compositions and processing conditions are disclosed for the production by rotomolding of polypropylene foams, hither to satisfactorily produced only by injection molding and extrusion molding. Rheological properties of the polypropylene resin, processing conditions and choice of composition of the chemical blowing agent were found to play important roles in obtaining high quality polypropylene foam structures. High strength fine-cell polypropylene foams could in particular be formed by first melt compounding a suitable chemical blowing agent with the resin under conditions which allow for homogeneous mixing without appreciable decomposition of the blowing agent.
D'uva Salvatore
Liu Fangyi
Liu Guobin
Park Chul B.
Pop-Iliev Remon
D'uva Salvatore
Ingenia Polymers Corp.
Liu Fangyi
Liu Guobin
Park Chul B.
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