Polycarbonate materials give you a great blend of helpful features which include temp resistance, impact resistance and optical properties position polycarbonates between commodity plastics and engineering materials. Polycarbonate is a very tough material. Even though it offers tremendous impact-resistance, it has a lower scratch-resistance and thus a hard coating could be applied to polycarbonate eye wear and polycarbonate exterior motor vehicle components. The properties of polycarbonate are like those of polymethyl methacrylate (PMMA, acrylic), except polycarbonate definitely is stronger, it is usable in a wider temperature range and is a bit more expensive. This plastic polymer is highly transparent to visible light and has better light transmission characteristics than many different types of glass. Polycarbonate has a glass transition temperature of around 150 °C (302 °F), so it softens slowly above this point and flows above about 300°C (572 °F). Tools need to be held at hi...