THE CENTRIFUGE - AN ALTERNATIVE TO THE FILTER FOR HIGHLY CONTAMINATED POLYMER MELTS

摘要

The recycling of thermoplastics gains more and more importance. For removing the contamination one- or two-step filtration units are state of the art, but due to high material loadings or running costs they often reach their limits. Therefore IKV examines whether a centrifuge, which is fed with polymer melt, might be an alternative. In preliminary tests IKV showed that centrifuges built for low-viscosity materials can also be used for polymer melts. A centrifuge was installed into an extrusion line. Up to 10 weight-% of contamination could be removed out of the polymer melt successfully.