The RDX PET Rocket is directly mounted onto the extruder feed. AUXILIARY EQUIPMENT PETplanet Insider Vol. 25 No. 05/24 www.petpla.net 43 RDX PET Rocket uses on-site compressed air to replace desiccants Air-powered plastic drying Plastics, being highly susceptible to moisture absorption, present a range of challenges during processing due to the presence of moisture within the granules (hygroscopic materials) or condensate on the surface (non-hygroscopic materials). These often present processing and quality issues such as surface defects and compromised mechanical properties. Austrian company Blue Air Systems, which is based in Kundl, in the Tyrol region, has launched a solution that is, it says, a cost-effective alternative to desiccant dryers. Blue Air Systems’ RDX PET Rocket system dries plastic granules using existing, on-site compressed air systems. Blue Air says that RDX PET Rocket delivers good drying results with minimal operational costs and virtually maintenance-free production. The RDX PET Rocket is designed and built to withstand temperatures of up to 180 °C and seamlessly integrates with both central and auxiliary drying systems. It is directly mounted onto the extruder feed and features a 62-litre container that is 110 cm tall and offers both convenience and optimised space usage. The 27- and 42-litre versions are 90 cm in height. Pre-dried PET material can also be easily rehumidified and restored to the required processing temperature, Blue Air Systems says. The RDX PET Rocket is designed to ensure a constant dew point and to deliver reliable performance, regardless of ambient conditions. The company maintains that its product will eliminate the complexities of desiccant and cooling water, without fuss or bother. The RDX series extends beyond PET resin drying. Blue Air Systems has announced the introduction of its Modular Dryer RDL, which can use dehumidified compressed air from customers’ existing compressed air network, an integrated compressor system, or the exhaust air from the blowing process of an injection stretch blowmoulding machine for the drying process. Its throughput capacities range from 24 to 200kg/h, which means that the systems can cater to all plastics, including PET, without requiring a minimum drying temperature or water connection. Using existing compressed air infrastructure means that systems’ special applications, such as resin drying, operate at low cost or even free of charge. Heat and energy recovery further boost the efficiency and sustainability of the drying process, according to the company. Blue Air Systems says that the key features of the RDX series and Modular Dryer RDL systems are: Post-heating granulate dryer designed for PET (180 °C) Compatible with central or auxiliary dryers Directly mounts onto extruder feed – 62 l container, 110 cm in height, 27 and 42 l container with a height of 90 cm Restores pre-dried PET to the required processing temperature Maintains a constant dew point regardless of environmental conditions Operates without the need for molecular sieves and cooling water. www.blue-air.at
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