Depending on the process small (< 0.2 %) to large amounts (ca. 50 %) of volatiles have to be removed from the polymer melt rsp. solution or the solid polymer pellet. Required residual volatile levels depend on type and application of polymer. Volatiles could be monomers, moisture, gases e.g. air or solvents. The type of volatile depends on polymer and way of polimerization.
As a technology leader for processing tasks, Coperion offers comprehensive, tailor-made devolatilization solutions for compounding and extrusion processes. These range from the devolatilization of plastic melts and rubber devolatilization to the production of practically odorless plastics for packing materials or auto interiors. Regardless of whether volatile components are available in small or large batch sizes, with a high or low boiling point – with their years of experience from numerous projects, tests, simulations and scale-ups, our specialists adapt every twin screw extruder optimally to your devolatilization application, from the lab scale extruder to the high-performance compounding plant.
For the processing of low-viscous, thin-bodied melts and for extrusion processes with high gas quantities we integrate our ZS-EG twin screw side degassing into compounding plants. With its large cross section for the devolatilization, it keeps the melt in the process section without product escape even at maximum specific torque of the extruder. Fumes or gases are reliably drawn off through the axially open screw flights. Increases in the throughput rate of up to 30 % with improved product quality are possible.