TUBE NEWS TN December 2017 - Page 5

Ettlinger’s new ERF350 boasts high throughputs of up to 3800 kg/h, depending on the screen size and the type and level of contamination in the melt to be cleaned, in combination with ultra-low melt losses. © Ettlinger Like all ERF and ECO filters built by Ettlinger, the new, self-cleaning ERF350 model works with a rotating, perforated drum, through which there is a continuous flow of melt from the outside to the inside. The screen sizes range from 80 µm to 1300 µm. A scraper continuously removes the contaminants that are held back on the surface and feeds them to an exit screw or discharge shaft. This enables the filter to be used fully automatically and without any disruptions over a period of weeks and months without having to replace the screen. The advantages of this design are the constant melt pressure at the filter outlet leading to more reliable processing, ultra-low melt losses – recognized throughout the industry – and good mixing and homogenizing of the melts. Whereas the ERF series is optimized for separating foreign particles from heavily contaminated polymers, the ECO series is ideal for filtering polyolefins, PET and PA as well as recycled material containing up to 1.5% contaminants during the extrusion of films, sheets and other semifinished products. . Karsten Bräunig, Manager Sales TUBE NEWS December 2017 5