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ALTERNATIVE EXTRUDERS | MACHINERY


tional single screw extruder, the Multi Rotation Section is effectively a drum containing eight satellite single screws driven by a ring gear and pinion transmission. The ‘barrels’ cut into the drum are approximately 30% open and provide optimum exposure of the melt.


Energy savings The company says the design results in devolatilis- ing performance that is approximately 50 times greater than that of a conventional single screw extruder and at a vacuum of only 25-40 mbar. By avoiding the need for a deep vacuum system and pre-drying, the MRS provides an economically efficient alternative to conventional technologies. It also offers energy savings, a simple and rugged design, small footprint, ease of operation and low maintenance, processing flexibility and good melt quality and homogeneity. The Gneuss MRS recycling process has now


received approvals for use in food packaging applications from around the world. The first Letter of Non Objection from the US FDA was achieved in 2009, but now the MRS extruder has received a large number of approvals for processing up to 100% post-consumer and industrial polymer waste for food contact products. In Europe, the Gneuss recycling process has passed the EFSA challenge test for the processing of 100% post-consumer PET. This year, Gneuss obtained food contact approval from Anvisa in Brazil while the Gneuss recycling process has also achieved standards set by the Colombian food safety agency Invima and its Argentinian counterpart Senasa. According to the company, the devolatilisation


performance of the Gneuss MRS extruder means that contaminants such as oils and other harmful volatiles and odours are efficiently removed from washed PET scrap without the need for pre-drying or any other heat treatment prior to extrusion. This reduces investment and energy costs as a whole inflexible process is eliminated , but the risk of damage to the material is also prevented. In addition, the polymer is processed gently in the low shear MRS extruder so the final product has very good colour (displaying low yellowing) and transparency.


CLICK ON THE LINKS FOR MORE INFORMATION: � www.busscorp.com � www.linkedin.com/company/kneadingexperts/ � www.farrel-pomini.com � www.cpmextrusiongroup.com � www.keimei.dewww.entex.dewww.gneuss.com


Above: The devolatilising performance of the Gneuss MRS extruder makes it a good option for processing recycled resins


GEAR PUMPS, FILTRATION, PELLETIZING AND PULVERIZING SYSTEMS


MAAG – 4 STEPS AHEAD FOR YOUR SUCCESS


www.maag.com


PHOTO: GNEUSS


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Hall A6, Stand 6202


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