Optimized Temperature Pelletizing OPT
New Process to Cut Technical Thermoplastics under Water
Maag Automatik, part of Maag Pump Systems AG, Oberglatt, Switzerland, has developed a revolutionary process for pelletizing special engineering polymers. Optimized Temperature Pelletizing (OTP) opens the way to pelletize technical thermoplastics in Maag’s Sphero underwater pelletizing system. It can cover the entire process from plastic melt to finished high quality pellets.
Spherical pellets have less wear during any transportation process compared to other geometries. Less wear equals less dust formation, which results in less effort for dust removal or cleaning. The improved process yields a better pellet quality, and therefore increased profits.
In the presence of pressurized over-heated water (> 100°C) pellets are cut and subjected to the first cooling step. In the transfer unit, the pellets are separated from overheated water and handed over to the second cooling circuit (< 95°C). After subsequent cooling the pressure is released and the pellets are separated by the Centro dryer from the process water. Leaving the drying process, the pellets are ready for subsequent processing or packing. The closed loops result in operating conditions without any emission to the air and without contamination of the product.
Based on the higher temperature level in the isolated first cooling process, that energy could easily be used for heating purposes or transformed e.g. into electrical power, suitable for the involved consumption elements like pumps, motors, etc. OTP pellets meet the high standards of plastics used in medical applications. Even optical applications like glasses or screens can now be handled with polycarbonate, pelletized with OTP. Also there is a large scope of utilization in the automotive industry: Panorama roofs, cable connections or parts of the engine can be produced from OTP pellets.
Maag Pump Systems AG
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