Recycler Soreplastic S.A. in Belgium is now running a customised Power Universo 2800 single-shaft shredder from Lindner ReSource and a 1716 TVEplus recycling extrusion line from Erema, reportedly enabling it to contribute to the conversion of collected post-consumer film – often heavily soiled with foreign materials – into re-granulate.
Whilst the material may not lend itself easily to shredding, separation and cleaning, the plastics involved, such as LDPE (low-density polyethylene) and LLDPE (linear low-density polyethylene), are in demand in the region, even as recyclate. Vincent Sciascia, the company's Managing Director said: "High throughput, low sensitivity to impurities, low wear costs and constant high quality of the final product were our main criteria. In addition, we required extensive support from the machine builders – from advice in the project development phase through customizing the machines for our purposes, but also in terms of local presence from the first start-up to the plant's trouble-free continuous operation. In the final analysis, Lindner ReSource and Erema convinced us in every respect."
Following the separator-based and manual removal of coarse foreign debris, a belt conveyor feeds the material first into the Power Universo 2800, a slow-running single-shaft shredder with a throughput capacity of 3 to 8 tons/h depending on the type of film being processed. Its large charging orifice facilitates loading where films are larger and bulky. The machine's point blade rotor, measuring approximately 2,800 mm in length, is driven by two 132 kW electric motors. At a variable operating speed of around 100 r.p.m., the rotor – carrying 86 knives – draws in the film pieces in a uniform manner and with low dust release. Interchangeable screens with 50 to 100 mm hole diameters allow for adaptation of the shredder to each specific film charge. At the end of this pre-shredding step, shreds measuring between 50 and 100 mm can reportedly be obtained.