Polycarbonates (PC) are a group of thermoplastic polymers containing carbonate groups in their chemical structures. Polycarbonates used in engineering are strong, tough materials, and some grades are optically transparent. They are easily worked, molded, and thermoformed. Because of these properties, polycarbonates find many applications.
Polycarbonate is a durable, lightweight and eco-friendly material. It has high impact-resistanct and high heat/cold-resistance, from −40 °C (−40 °F) to 150 °C (302 °F). PC material has been widely used in helmet field, like bicycle helmet, kids helmet, rock climbing helmet, etc...