Italian plastics machinery supplier ICMA SAN GIORGIO is hosting a three-way Open House along with Filtec (Italy) and Ettlinger (Germany) at its offices in San Giorgio su Legnano, near Milan, on February 19-20The three companies specialize in their respective fields: recycling-compounding, filtration systems and cutting devices. Three systems are presented which, when working in combination, recycle heterogeneous waste efficiently.
Two live demonstrations will be given during the open house on a line based on ICMA SAN GIORGIO’s co-rotating twin-screw extruder, which is optimized for advanced recycling. The first demonstration will involve the processing of heterogeneous packaging waste, including primarily polyolefins, but also containing barrier film, metalized film, printed film and so on. Normally, this type of waste cannot be recycled just as it is or it is used to make low cost products, such as low-pressure moldings. The extruder used, on the other hand, gives the product a higher characteristic allowing the use of the material in more sophisticated applications, obtaining an added value product, ICMA notes.
The second demonstration also intends to offer an advanced example of recycling, namely the recover of ground but not washed car bumpers. These components are made by polypropylene, modified with thermoplastic rubber to increase the elastic modulus and with mineral fillers to boost sturdiness.All the above is possible because of the mixing performance achieved by ICMA twin-screw co-rotating technology, the company states. Another important aspect is the high efficiency of the degassing system which permits maximum extraction of the volatile substances, normally at high content in a matrix of this kind.
The co-rotating technology also offers the opportunity of filling or reinforcing the polymer. A continuous, latest generation ERF screen-changer developed by Ettlinger is installed downstream the extruder. The device is fully automatic and can reach high filtration performance levels, to the order of 150 micron, even with a very high percentage of pollutants and without requiring the constant presence of an operator.Further downstream, the line will have an underwater pelletizer, specifically tuned by Filtec for this process. The underwater technology allows the immediate cooling of the material, thus guaranteeing highly precise and consistent cutting even with highly complex materials, explains ICMA.