Extrusion International 4-2019

PREVIEW 64 Extrusion International 4/2019 Gneuss Filtration Technology will exhibit several different models of their patented Rotary Filtration Systems. These con- tinuous filtration systems are characterized by a filter disk on which the screen cavities are located in a ring pattern. Screens can be changed on the part of the filter disk that is not active in the melt channel, while the production process continues to run without any interruptions or disturbances. The new model SFneos was developed to combine the char- actertistics of several older models into one simple and cost- efiicient solution, offering the following advantages: • Constant pressure guaranteed – even during screen changes • Suitable for most types of polymers and viscosities • Compact design thanks to an enlarged active screen area (up to 2370 cm 2 ) • Simple and safe handling and operation with several screens accessible for screen changes • Very cost effective thanks to its improved design The SFneos is the ideal filtration system for applications that benefit from a continuous, pressure and process constant screen changer, but that don’t require back-flushing. The SF- neos 90 on display has an active screen area of 260 cm 2 . Gneuss’ top model, the RSFgenius , operates with an integrat- ed self cleaning system for very demanding applications and highest quality requirements. Screens can be automatically re-used up to 400 times and filtration finenesses below 10 mi- crons/1200 mesh are available. There will be different sizes on display, including an RSFgenius 330, which will be the biggest filter on theGneuss booth this year. It offers an active filtration New Rotary Filtration System SFneos, Second Generation Multiple Screw Extruder MRS and More area of 2150 cm 2 and will be shipped to an end customer in Southern Europe after the show. Last but by no means least, Gneuss will exhibit two KF screen changers, aKF 75with an active screen area of 44 cm2 and aKF 110 with an active screen area of 95 cm 2 . The KF 110 will be installed in a blown film line at Brazilian machinery manufacturer Carnevalli’s booth (hall 16, booth C70). The KF series of continuous filtration systems is designed specifically for applications with frequent material type, grade or color changes as well as for high pressure applications like blown film. Gneuss also offers a new semi-continuous model, the CSFpri- mus . This model is used as a pre-filer, safety filter or in applica- tions with little contamination and is characterized by a very large active screen area for its small footprint. Gneuss Extrusion Technology will show a complete Gneuss Processing Unit (GPU) including a second generation Multi Rotation System MRS110 extruder, a fully automatic melt fil- tration systemRSFgenius 90 and a new style online viscometer VIS , for the processing of 600 kg/h of undried and uncrystal- lized polyester (PET). The Gneuss Processing Unit (GPU) has been available for more than a decade now and has proven itself for the reprocess- ing of highly contaminated materials without pre-drying, es- pecially bulky PET waste such as post-consumer bottle flakes and industrial waste from fiber and film manufacture as well as polystyrene, nylon and other hydrophil polymers. A Gneuss Processing Unit consists of a Gneuss MRS extruder with its un- matched devolatilization and decontamination performance in combination with a highly-efficient Gneuss Rotary Filtration System and an online viscometer VIS for intelligent dynamic viscosity control. The MRS extruder itself has been improved considerably over the last decade and at the K show the second generation design will be on display. The enhanced drive design is more robust to handle even more demanding recycling environ- ments. Thanks to several changes in the MRS drum and screw design the already unmatched IV retention has been further improved, while continuing to forgo pre-drying. The MRS ex- truder permits the processing of PET without pre-drying by using a simple water ring vacuum system to process the ma- terial directly to high quality end products such as packaging sheet, strapping tape or filaments. This is achieved by means of its unique and patented processing section. Based on a con- ventional single screw extruder, theMulti Rotation Section is a Patented Rotary Filtration System SFneos