Polycarbonate (PC) is a high performance material intended for use in engineering and industrial settings. As suggested by its name, PC contains carbonate groups that contribute significantly to its strength and toughness. PC also has excellent temperature resistance, making it useful in high temperature applications as well. Recycled polycarbonate (rPC) comes from regrinding a source of polycarbonate, like failed prints. If you are looking for a strong, industrial material that is also sustainable, rPC is an excellent choice.