Twin-screw extruders from Coperion are play a key role in the manufacture of high-quality compounds made from recycled plastics, along with Erema’s Corema technology.
Corema gives recyclers the ability to manufacture and market ready-to-use quality granules with the properties for specific high-quality applications, giving them a significantly larger share of the value-added chain within the economic cycle.
The initial step of the recycling process consists of plasticising and filtering in an Erema single-screw extruder with a cutter compactor. Next to this, the compounding step follows in a co-rotating Coperion ZSK or STS twin-screw extruder. This is where the profile of the recyclate can be tailored precisely.
The interplay of the two technologies ensures that compounds are treated gently and subjected to minimal thermal stress, because the melt is passed directly from extruder to extruder without any cooling and reheating stage. Processing at a constant temperature also provides for extremely energy-efficient operations.