New ZSK screw elements for significantly higher throughput.
To significantly increase throughput rates of its first-class ZSK extruder series, Coperion has developed special involute screw and kneading elements with a new and patented cross section design. These screw elements are ideal for highly-filled recipes (70-85% CaCO3, TiO2, mainly based on PP/PE and 20-50% talc for automotive grades) for which the dispersion rating and the incorporation of the filler represents a limitation. Besides higher throughput rates, these involute screw elements ensure higher loading of filler, better dispersion and homogenization, lower energy consumption (SEI in kWh/kg) and a significant increase in profitability.
Comprehensive tests at Coperion’s test lab in Stuttgart, Germany, showed a remarkable throughput increase depending on the recipe. For example, when processing PP and 70% CaCO3 on a twin screw extruder ZSK 58 Mc18 the new screw elements achieved a significant throughput increase from 550 kg/h to 900 kg/h. Similar results have been reached when processing PE with 80% CaCO3 on a ZSK 92 Mc18. In this case throughput was increased from 2200 kg/h to 3000 kg/h.
Exhibitor: Coperion GmbH