PETpla.net Insider 03 / 2015

MATERIAL / RECYCLING 23 PET planet insider Vol. 16 No. 03/15 www.petpla.net What technical innovations can be found inside the SW RTF melt filters? Christoph Wöss: First and fore- most the very large active filter areas and the patented partial surface back- flush screen changers. These screen changers feature a fully automatic self-cleaning system which, despite extremely fine filtration of 32 μm, allows low pressure losses, high filter capacity and long filter service life. These factors play a considerable part in the outstanding efficiency of the systems and the result is extremely clean recycled pellets. What is the additional benefit for the users as a result? Christoph Wöss: Here it is worth noting in particular the fact that our customers save costs which are often necessary in the case of other manu- facturers’ systems due to expensive special filters. Which application fields are recommended in particular for SW RTF melt filter systems? Christoph Wöss: The Erema high- performance filters can be connected directly to the extruder outlet and have been so successful especially for large area ultrafine melt filtration in the production of flat film that other manufacturers of film plants now use the EREMA piston screen changer for melt filtration as standard. I would like to emphasise the process stabil- ity to be achieved here. Thanks to the large filter surface and pressure-stable single-screw extruder, unequalled pressure stability upstream of the flat die can be reached compared to other processes, despite a higher level of contaminants in the input material. Together with the patented pre-treat- ment of the PET flakes this results in an end product with top-quality reproducibility and stability in terms of viscosity, colour and purity. This is why so many of our SW RTF filters are also used successfully for opti- cally ultraclean film applications and have proven their merits even in inline applications which require a stable and smooth process for clean results. These are available in a variety of sizes and output levels, up to the six- piston system with twelve parallel filter screens. www.erema.at product development caps & closures design high cavitation moulds multi-component moulds closure production systems after sales service competent – professional – inspiring Hoechster Strasse 8 | 6850 Dornbirn | Austria | www.z-moulds.com NPE 2015 March 23rd-27th meet us at booth S24138-04