B - Operations – Transporting – 29 – B
Patent
B - Operations, Transporting
29
B
B29B 13/02 (2006.01) B28B 13/06 (2006.01) B29B 7/60 (2006.01) B29B 7/82 (2006.01) B29B 9/06 (2006.01) B29C 31/02 (2006.01) B29C 47/10 (2006.01)
Patent
CA 2403431
The invention relates to a method for granulating thermoplastic polymers, especially thermoplastic polyolefins, according to which the polymer powder produced in the polymerization reactor is melted and homogenized, forced through an extrusion nozzle and granulated. According to the invention, the polymer powder is subjected to a heat treatment prior to being charged on the extruder so that the polymer powder is fed to the extruder at an elevated powder temperature. The inventive method is especially suitable for granulating polyethylene or polypropylene.
L'invention concerne un procédé de granulation de polymères thermoplastiques, en particulier de polyoléfines thermoplastiques, consistant à fondre et à homogénéiser la poudre polymère fabriquée dans le réacteur de polymérisation, à la presser au travers d'une buse d'extrusion, puis à granuler cette poudre. Selon l'invention, la poudre polymère est soumise à un traitement thermique avant chargement dans l'extrudeuse, le chargement de ladite poudre polymère dans l'extrudeuse étant ainsi effectué avec une température de poudre supérieure. Ladite invention est particulièrement adaptée à la granulation de polyéthylène ou de polypropylène.
Anderlik Rainer
Bickel Wolfgang
Hofmann Jurgen
Kessler Thomas
Rizk Farid
Basell Polyolefine Gmbh
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
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