This comes up in 3d printing often. The bottom line is that grinding and pelletizing and then extruding even pure PLA post-use for use in the same machine is n

This comes up in 3d printing often. The bottom line is that grinding and pelletizing and then extruding even pure PLA post-use for use in the same machine is nigh impossible. It degrades, it gets dust in it, you block your 3d printer nozzle and damage your hot end.