CHICAGO (June 22, 10:21 a.m. ET) — Buss AG (Booth N83039) has advanced its four-flight Quantec Kneader, making it possible to compound rigid PVC with up to 100 parts per hundred resin.
The improved Kneader's process zone has been extended to a 15:1 length: diameter ratio. A downstream vertical intake screw has been added for feeding fillers directly into the gelled PVC melt. Both these expanded intakes have a larger housing and screw diameter, allowing the biggest possible fillers take-up volume in the process zone.
Trials have shown the Quantec has throughputs as high as 858 pounds per hour at fillings of 100 pounds per hundred resin of calcium carbonate.
Buss of Pratteln, Switzerland, notes its four-flight Buss MX Kneader is successful in applications beyond cable compounds. The new applications cover most high-fill temperature- and shear-sensitive compounds. For the same machine size, throughput of these kneaders is two and a half times that of previous models. Buss is displaying an MX Kneader at NPE2009.