B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
B29C 47/76 (2006.01) B29C 47/10 (2006.01) B29C 47/42 (2006.01)
Patent
CA 2352256
The invention relates to a method for processing a thermoplastic condensation polymer which comprises the following process steps: introduction of the condensation polymer into an extruder (1) in the solid state; heating of the condensation polymer to a temperature below the melting point; degassing and/or drying of the condensation polymer and subsequent melting thereof. According to the invention the condensation polymer is degassed and/or dried in the solid state at a pressure below atmospheric pressure and/or an inert gas is added.
L'invention concerne un procédé de traitement d'un polycondensat thermoplastique qui comprend les étapes suivantes: introduction du polycondensat à l'état solide dans une extrudeuse (1); chauffage du polycondensat jusqu'à une température inférieure au point de fusion; dégazage et/ou séchage du polycondensat; et ensuite fusion du polycondensat. Selon l'invention, le dégazage et/ou le séchage du polycondensat se font lorsque celui-ci est à l'état solide, sous une pression inférieure à la pression atmosphérique, et/ou on ajoute un gaz inerte.
Goedicke Frank
Innerebner Federico
Buhler Ag
Gowling Lafleur Henderson Llp
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