At the Fraunhofer IAP a new process for the production of granulate from Rayon tire yarn and polypropylene for injection molding applications has been developed.
The production of injection moldable granulate at the Fraunhofer IAP incorporates two
steps. First, the cellulosic continuous fibers are coated with the polymer matrix melted
in the extruder (see figure). After cooling, the produced thread it is cut on a
laboratory granulator. The received granulate is dried. In a second processing step the
compounds are homogenized on the same twin-screw extruder. Thus, the injection moldable
granulate is obtained after granulation and drying.
