Patent ID: 9149968
Filing Date: 2015-10-06
Classification: B29C,B29K

Abstract:
1. A process for the production of a molding composed of a polyoxymethylene polymer via blow molding, comprising the following steps: (a) extruding the polyoxymethylene polymer to give extruded tubing, using an extruder with a grooved feed section, where the feed section is heated to a temperature in the range from 100 to 230° C., and where a thermal separation system is provided between the feed section and the following sections in the barrel of the extruder, (b) introducing the extruded tubing composed of the polyoxymethylene polymer into a blow mold, (c) producing the molding composed of the extruded tubing in the blow mold, wherein the polyoxymethylene polymer is in the form of pellets when added to the extruder, where the pellets are preheated to a temperature in the range from 60 to 150° C., wherein the polyoxymethylene polymer is composed of: