Degassing extruder for degassing a polymer material and...

Details Degassing extruder for degassing a polymer material and... Degassing extruder for degassing a polymer material and...

B - Operations, Transporting

29

C

B29C 47/76 (2006.01) B01D 5/00 (2006.01) B29C 47/84 (2006.01)

Patent

CA 2699735

The invention relates to a vented extruder (1) for the devolatilization of a polymer material, encompassing at least one extruder barrel (2) with at least one rotatably driven extruder screw (3) mounted in the extruder barrel (2), and with at least one material feed and with at least one extrudate outlet, and also with at least one vent zone (9). A particular feature of the vented extruder (1) is that the gas output for the gas arising in the vent zone (9) has been provided upstream of the material feed, in relation to the direction of conveying of the polymer material.

L'invention concerne une extrudeuse-dégazeuse (1) destinée au dégazage d'un matériau polymère, qui comprend au moins un fourreau (2), au moins une vis d'extrudeuse (3) logée dans le fourreau (2) et entraînée en rotation, au moins une alimentation en matériau, au moins une sortie pour l'extrudat et au moins une zone de dégazage (9). L'extrudeuse-dégazeuse (1) se caractérise en particulier en ce que la sortie pour le gaz produit dans la zone de dégazage (9) est placée en amont de l'alimentation en matériau par rapport au sens d'acheminement du matériau polymère.

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