Extrusion Asia Edition 1-2023

格诺斯创造安全。除了符合标准的压力监测外，格诺斯 还为测量设备提供必要的质量保证。 格诺斯是数字化的。最新一代的格诺斯传感器和压力监 测器完全以数字方式进行通信。用于数字仪表监控的集成 RFID 芯片适用于所有传感器型号。 Extrusion Technology New OMNI Recycling Machines for closed loop recycling of PET, PS and polyolefin post-consumer reclaim Gneuss’ MRS Extrusion Technology has proven itself as an alter- native for the reprocessing of contaminated materials like poly- ester, polystyrene, polypropylene or polyethylenes. In combina- tion with the highly efficient Gneuss Rotary Filtration Systems and optimized vacuum technology, customizable recycling lines tailor-made for a specific material can be engineered. Several Letters of Non Objection (LNOs) from the FDA, EFSA conformi- ty and local approvals in Latin America confirm the decontami- nation efficiency of the technology. OMNI Recycling Machine for post-consumer fiber or thermoform reclaim Gneuss will show its latest machinery innovations for today’s and tomorrow’s recycling needs with the new OMNI Recycling Machines. The OMNImax Recycling Machine processes industrial and post-consumer waste from all kinds of polymers and in all forms and shapes. It includes a 3C Rotary Feeder, an MRS jump extruder, a fully automatic melt filtration system RSFgenius and an online viscometer VIS. 3C Rotary Feeder The newly developed 3C Rotary Feeder makes it possible to use low bulk density materials without any external processing steps. A conveyor belt feeds shredded reclaim material into the hopper, where a fast-rotating disc with knives cuts, compacts and pre-conditions the material. The knives add energy into the material and start the heating and degassing process before the material is automatically fed into the MRS jump extruder. MRSjump The MRS extruder is based on conventional single screw tech- nology but is equipped with a multiple screw section for devo- latilization. It enables very efficient and gentle decontamination of PET, whilst achieving the requirements for direct food con- tact standards. The MRS extruder permits the processing of R- PET directly into high quality end products such as packaging sheet, strapping tape or filaments without pre-drying by using a simple and rugged vacuum system. This is achieved by means of its unique and patented processing section. The Multi Rota- tion 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 completely under vacuum. This provides excellent and unrestricted access to the polymer melt, the surface of which is constantly replaced at an extreme- ly high rate by the action of the satellite screws in the multiple screw section. The surface area – and the surface area ex- change rate – available for devolatilization are far greater than in other extrusion systems. As the thermal and mechanical stress on the polymer melt is minimized, PET processed on the MRS extruder has excellent optical and mechanical properties. The new MRSjump has a longer, modified version of the Multi Rotation Section, which ensures both a longer residence time of the material and more surface area exchange under vacuum. The longer Multi Rotation Section, coupled with a powerful va- cuum system operating at 1 mbar, can be used to boost the vis- cosity of R-PET and to hold it at a stable level in spite of varia- tions in the input material. Therefore, there is no need for any liquid phase (LSP) or solid state polymerization (SSP). With the stabilization and/or increase of the intrinsic viscosity in the ex- trusion process, the MRSjump is especially well suited to recy- cling e.g. PET film waste or fiber reclaim – applications for which direct recycling with one single extrusion step was pre- viously impossible due to low intrinsic viscosity or variable input viscosities. In combination with Gneuss’ Rotary Filtration Tech- nology, a high melt purity is guaranteed. Quality assurance can be provided with an online viscometer VIS for measuring melt viscosity. As demand for PET bottle flakes outpaces supply and proces- sors are looking for alternative feedstock (e.g. to fullfil recycled content mandates) the MRSjump offers an excellent solution for PET thermoform, film or fiber recycling, while the newly de- veloped MRS cutter compactor makes it possible to use low bulk density materials. 图3： 专利旋转过滤系统RSFgenius Picture 3: Patented Rotary Filtration System RSFgenius 34 2023中国国际橡塑展 – Chinaplas 2023 Extrusion Asia Edition 1/2023