Since the last Index exhibition, about 40 of the Multi Rotation System (MRS) extruders for processing PET reclaim without pre-dry-ing have been sold for sheet, fiber and repel-letizing applications. Advantages are e.g. very high devolatilizing and decontamination performance. Thanks to the patented combination of single screw extruder with a multiple screw section, the extruder is particularly rugged, as well as easy to operate and maintain. Even fibers coated with spin oils and other contaminants and with high residual moisture level can be fed directly into the extruder without any pre-treatment. Bicompo- nent (core/sheath etc.) staple fibers can for example be manufactured using the same input material and 2 different vacuum levels on 2 MRS extruders to deliver 2 melts with differing viscosities to the spinning beam. There are not only PET processing applications, but also some references in polyamide and poly-olefin processing.
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