Method for granulating thermoplastic polymers

摘要

In a method for granulating thermoplastic polymers, in particular thermoplastic polyolefins, the polymer powder prepared in the polymerization reactor is melted and homogenized in an extruder, then forced through an extrusion die and granulated. In accordance with the invention, the polymer powder is subjected to heat treatment before introduction into the extruder, resulting in the introduction of the polymer powder into the extruder being carried out at an elevated powder temperature. The invention is particularly suitable for the granulation of polyethylene or polypropylene.