MATERIALS / RECYCLING PETplanet Insider Vol. 23 No. 05/22 www.petpla.net 17 MATERIALS / RECYCLING 17 www.sacmi.com Product design Product development Product validation Industrial production plant Process & quality control On-site and start-up assistance After-sales and Customer service SACMI 4.0 THE COMPLETE CLOSURE, PREFORM AND CONTAINER SOLUTION FOR YOUR SMART FACTORY E N D L E S S I N N O V A T I O N S I N C E 1 9 1 9 Magnetic density separation (MDS) principle Umincorp’s patented mechanical recycling process is based on flake sorting. In an early stage of the process, all incoming plastics are cut into flakes and separated via MDS. The MDS application, with a capacity of 10,000 t/a, makes use of specially designed magnets in combination with a unique water-based process fluid to separate heterogeneous input flows on density levels of each individual particle in one step. The magneto-responsive fluid, produced in-house at Umincorp, together with the permanent magnet, creates the required density gradient so that there are different densities at different heights in the machine. Particles flow through the density field, with light particles floating on the surface while heavier particles are suspended in the liquid below at different depths according to their density. The separation for the production of pure material fractions of equal densities are combined into one process by setting splitters in the right positions. The use of MDS in the plastics industry is claimed to result in high purity PP, HDPE, PS, PET, ABS, PVC, or other plastics fractions that can be used directly in new end products. Umincorp was established in 2012 to develop and market its MDS technology. The idea was born in 2005 under the lead of Professor Peter Rem at the Delft University of Technology, the Netherlands.
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