PROCESS FOR THE PREPARATION OF POLYAMIDE GRANULES

摘要

The invention relates to a granule and granulate and to a process for the preparation of polyamide granules at least comprising a) polymerising at lea st one dicarboxylic acid and at least one diamine until a low-molecular prepolymer powder is obtained; b) processing the prepolymer powder obtained in step (a) to form granules, with the prepolymer powder being extruded at a temperature, measured under the chosen extrusion conditions, below the melti ng point of the prepolymer. The process of the invention allows the production of granules that have a higher granule strength than that according to the stat e of the art. The process of the invention also produces fewer fines. It is preferred for polyamide-4,6 to be chosen as polyamide. The granules and the granulate obtained by the process of the invention are particularly suited f or post-condensation.