Polycarbonate plastic products offer a unique balance of beneficial features this includes temp resistance, impact resistance and optical properties position polycarbonates between commodity plastics and engineering materials.
Polycarbonate is definitely a tough material. Even though it features increased impact-resistance, it has reduced scratch-resistance and thus a hard coating is applied to polycarbonate eyewear and polycarbonate exterior vehicle equipment. The properties associated with polycarbonate tend to be similar to those of polymethyl methacrylate (PMMA, acrylic), and yet polycarbonate 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 most grades of glass.
Polycarbonate carries a glass transition temperature near 150 °C (302 °F), consequently it softens slowly above this point and flows above about 300°C (572 °F). Tools must be held at higher temperatures, generally above 80 °C (176 °F) to help make strain- and almost stress free products.
Unlike many thermoplastics, polycarbonate can undergo massive changes in basic shape without breaking or cracking. For that reason, it can be processed and formed  cold using standard sheet metal techniques, for example forming bends on a brake. For even sharp angle bends with a tight radius, no heating is usually necessary. This makes it useful for prototyping applications where transparent or electrically non-conductive parts are required, which should not be produced from sheet metal. Remember that PMMA/Plexiglas, that is certainly similar in appearance to polycarbonate, but it is brittle and can't be bent without heating.
Polycarbonate is often utilized in eye protection, as well as in other projectile-resistant see through applications that would normally require the use of glass, but require much higher impact-resistance. Many different types of lenses are made of polycarbonate, including automotive headlamp lenses, lighting lenses, sunglass/eyeglass lenses, swimming and SCUBA goggles, and safety glasses for use in sporting helmets/masks and police riot gear. Windscreens in small motorized vehicles are normally fabricated from polycarbonate, such as for motorcycles, ATVs, golf carts, and small planes and helicopters.
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