>> Production of heavy layer by the split-feed method
Processing of heavy layer
Twin screw extruders from Coperion have proven successful for the production of heavy layer for many decades. High-filled compounds for heavy layer are used for example in the automobile industry for damping engine and driving noise. The extruded films are backed partly with felts, foams or carpets. They are then formed into the desired shape on presses or by deep drawing and cut.
Typical set-up of a plant for the production of heavy layer
The split-speed process has established itself on the market for the processing of heavy layer. In this process the backbone polymers/elastomers, small components and some of the liquids are fed into the first extruder barrel in separate streams and weighed gravimetrically.
Abrasive fillers are added to the plastic compound downstream by a twin screw side feeder. The advantages of the split-feed process are in the gentle handling of the raw materials and the resulting improvement in the product quality.