Influence of Flowability on the Processability of Thermoplastics in Additive Manufacturing: Comparison of Fused Layer Modeling ( FLM ) and Fused Granulate Fabrication ( FGF )

ABSTRACT This study investigates the influence of melt flowability and rheological behavior on the processability of thermoplastics in fused layer modeling (FLM) and fused granulate fabrication (FGF). Four PP grades, two ABS grades, and two SAN grades were analyzed using rotational and capillary rheometry. The results were correlated with stringing behavior, surface quality and extrusion stability in both processes. Amorphous ABS and SAN exhibit consistently higher processing stability in the FG