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Logo Made in Germany PLASTINDIA 2018

Coperions' new involute screw elements for ZSK twin screw extruders

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.

www.coperion.com/en/know-how/technology/extrusion-te...

Exhibitor: Coperion GmbH

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