A research paper and associated video has been published demonstrating the freeform printing of extruded thermoset plastics. The video shows a thermoset composite being extruded and curing in mid air, and without support material. It has been achieved with a process known as Frontal Polymerization, and the researchers from Colorado State University claim this is the first time that freeform printing thermoset composites with FP has been demonstrated. You can see the FP printing in action in the video below. Read on to know more about Frontal Polymerization. Thermoset The vast majority of extrusion-based carbon-fiber composite printer systems utilize feedstock consisting of short chopped fiber pieces encased within a thermoplastic matrix (the filament or pellet). This is exactly how a heat-based plastic printer works. It melts a thermoplastic with its hotend, it extrudes it, the extruded plastic cools rapidly as it leaves the nozzle, and it sets into shape. The… read more