PROCESS FOR THE PROCESSING OF A THERMOPLASTIC POLYCONDENSATION POLYMER

摘要

The invention relates to a process for the processing of a thermoplastic polycondensation polymer by supplying the polymer in finely distributed form to a vented extruder in which the polymer is devolatilized and melted. The polymer to be processed is transported below the melting temperature of the polymer over a considerable length of the screw from the inlet of the extruder, with constant evacuation of volatile components by means of a vacuum exhausting device at a vacuum of less than 10 mbar and the polymer is compressed and melted over the remaining length of the screw and then leaves the extruder as an end product or a semimanufacture.