K 2025 PREVIEW PETplanet Insider Vol. 26 No. 07+08/25 www.petpla.net 54 Unlocking new potential in existing processes Extrusion efficiency In an era of global uncertainty, extrusion processors face mounting pressure to reduce costs while maintaining quality and output. Gneuss offers a new powerful solution in the form of advanced melt filtration and extrusion equipment that can be integrated into existing lines. The company says that with reliable, flexible systems designed for minimal downtime, Gneuss helps processors unlock hidden potential within their current operations. Filtration technology The company’s flagship model, the RSFgenius maintains consistent melt pressure even when processing recycled material, thanks to its efficient, automatic, integrated self-cleaning system. This makes it useable for a wide range of applications. The filter elements can be automatically cleaned in situ up to 400 times and filter elements as fine as 10μm (1,200 mesh) can be applied. The RSFgenius 330L which will be displayed at the K show is one of the best-selling (and at the same time one of the largest) RSFgenius models. The unit on display has an active filtration area of 2,150cm² and is for LDPE/ LLDPE film recycling with a filtration fineness of 75 μm. Retrofitting a fully-automatic RSFgenius to an existing extrusion line, whether in a pelletising, sheet, fibre or pipe application, permits the use of more contaminated material and/ or the use of finer screens without disrupting the process or reducing production yield. Every retrofit is tailormade and usually without the need to move any existing equipment. Three further screen changer ranges will be represented at the K show, the SFXmagnus, SFneos and KSF screen changers. The SFXmagnus is a process-constant screen changer for a wide range of applications, the SFneos is a specialised screen changer which is claimed to offer a high level of process and pressure-stability, equivalent to that offered by the RSFgenius. This way, Gneuss can cover a huge range of applications, where self-cleaning is not necessarily required. This includes fibre extrusion, cast film, blown film with its high pressures, sheet extrusion of all kinds and even PVC recycling. Last but not least, the KSF range of screen changers is processconstant and designed with sensitive polymers in mind, says Gneuss. It is mostly used in compounding where its uniquely customisable design for unbeatably fast material and grade changes is a major advantage. All three ranges of screen changers have in common that they operate pressure and time-controlled, process-constant and that screen changes are made without disturbing the process. Multiple screw extruder MRS The MRS extruder is based on conventional single screw technology but is equipped with a multiple screw section for devolatilisation. It is claimed to enable efficient and gentle decontamination of the polymer melt. The MRS extruder permits the processing of rPET directly into high quality end products such as packaging sheet, strapping tape or filaments without predrying by using a simple and rugged vacuum system. All this is achieved by its patented processing section. The Multi Rotation Section is a drum containing multiple satellite single screws, driven by a ring gear and pinion transmission. The satellite screws rotate in the opposite direction to the main screw. This disproportionately increases the surface exchange of the polymer melt. A large opening for venting, exposing the full length of the satellite screws, is under vacuum. This provides unrestricted access to the polymer melt, the surface of which is constantly replaced at a very high rate by the counterrotation of the satellite screws in the multiple screw section. The surface area – and the surface area exchange rate – available for devolatilisation are far greater than in other extrusion systems. As the thermal and mechanical stress on the polymer melt is minimised, reclaim processed on the MRS extruder has good optical and mechanical properties. In a single, simple extrusion step, harmful contaminants are thoroughly removed, assuring that the end product is safe for use in food contact applications. OMNI recycling machines Gneuss’ MRS extrusion technology is known as an alternative for the reprocessing of contaminated materials like polyester (PET), polystyrene (PS), polypropylene (PP) or polyethylene (PE). In combination with efficient rotary filtration systems, optimised vacuum technology, an online viscometer VIS and Gneuss Measurement Technology, customisable recycling lines tailor-made for a specific material can be engineered. As an option, light-weight or fluffy materials can be fed into the extruder via a 3C Rotary Feeder. OMNI recycling lines offer Several Letters of Non-Objection (LNOs) from a North American food Gneuss Hall 9 Booth A22
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