Verfahren zur Verarbeitung eines Polykondensats in einem Mehrwellen-Extruder

摘要

A method for processing a polycondensate to give a granulate comprised of pellets is disclosed, whereby the polycondensate is fused in the course of the method and then later resolidified. Said method is characterised in that the total time during which the temperature of the polycondensate is above the melting point thereof is less than about 60 seconds. Said method is preferably carried out by means of a multi-shaft extruder, whereby the degassing and/or drying of the polycondensate in the solid state occurs at a pressure below atmospheric pressure and/or with addition of an inert gas. The time period, during which the polycondensate remains in the extruder, after being melted therein, amounts to less than about 15 seconds.