Extrusion is a well established production process in plastics engineering and food technology. Both industries have a sustainable demand and tendency for gentler processing of material systems susceptible to shear. A very gentle extrusion process, already established in plastics engineering but without practical application in food technology as yet, is based on the planetary roller extruder which is the subject of a new research project. Already used for many years in different non-food applications, e.g. the in-feed of PVC calenders…

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