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Polycarbonate materials have a unique balance of beneficial features including temperature resistance, impact resistance and optical properties position polycarbonates between commodity plastics and engineering plastics.
Polycarbonate is definitely a long-lasting material. Although it features greater impact-resistance, it has got a lower scratch-resistance and thus a hard coating can be applied to polycarbonate eyeglasses and polycarbonate exterior automobile components. The properties associated with polycarbonate are generally comparable to those of Acrylic PMMA materials, although 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 it has better light transmission characteristics than many different types of glass.
Polycarbonate has a glass transition temperature of about 150 °C (302 °F), so it softens gradually above this point and flows above about 300°C (572 °F). Tools must be held at warm to high temperatures, generally above 80 °C (176 °F) in order to make strain- and stress-free products.
Unlike many thermoplastics, polycarbonate can undergo massive shape changes without breaking. Hence, it could be processed and formed   cold using sheet metal techniques, which include forming bends on a brake. For even sharp angle bends with a tight radius, no heating is usually necessary. This makes it attractive prototyping applications where transparent or electrically non-conductive parts are required, which should not be made from sheet metal. Be aware that PMMA/Plexiglas, that is similar in looks to polycarbonate, but it's brittle and cannot be bent at room temperature.
Polycarbonate is commonly used in eye protection, in addition to other projectile-resistant optical type applications that would normally indicate the use of glass, but require greater impact-resistance. Many different types of lenses are created from 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 commonly made up of polycarbonate, such as for motorcycles, ATVs, golf carts, and small planes and helicopters.

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