"There's a gold rush going on in recycling," extrusion expert Paul Martin said March 5 at Antec 2025 in Philadelphia. "A lot ...

Ground plastic bits go in one end ... it’s made from scraps and bits most of us would throw out. Pellet agitator is part of the extruder. All of this travels along with the print head.

the researchers fed Bacillus subtilis spores and TPU pellets into a plastic extruder. The ingredients were mixed and melted at 135 degrees Celsius, then extruded as thin strips of plastic.

The resulting chips were smaller than the plastic pellets found in injection molding manufacturing plants, but will feed into the extruder well enough. Liquid nitrogen might be overkill in this ...