Polycarbonate materials give you a unique balance of useful features including high temperature resistance, impact resistance and optical properties position polycarbonates in between commodity plastic materials and engineering plastic materials.
Polycarbonate is a very tough material. Whilst it has considerable impact-resistance, it's got minimal scratch-resistance and so a hard coating could be applied to polycarbonate eyeglasses lenses and polycarbonate exterior automobile components. The characteristics associated with polycarbonate are generally like those of common Acrylic materials, but 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), therefore it softens gradually above this point and flows above about 300°C (572 °F). Tools need to be held at warm to high temperatures, generally above 80 °C (176 °F) to make strain- and reduced stress products.
Unlike most other thermoplastics, polycarbonate can undergo dramatic deformations without cracking or breaking. Subsequently, for small changes in shape, it can be processed and formed  without needing to be heated using standard sheet metal techniques, for instance forming bends with a brake. For even sharp angle bends having a tight radius, no heating is generally necessary. This makes it useful for prototyping applications where transparent or electrically non-conductive parts are crucial, which may not be produced from sheet metal. Understand that PMMA/Plexiglas, that is similar in appearance to polycarbonate, but it is brittle and cannot be bent with out a heating process.
Polycarbonate is frequently utilized in eye protection, along with other projectile-resistant optical type applications that would normally require the use of glass, but require higher impact-resistance. Several types of lenses are created from polycarbonate, including automotive headlamp lenses, lighting lenses, sunglass/eyeglass lenses, swimming and SCUBA goggles, and safety visors for use in sporting helmets/masks and police riot gear. Windscreens in small motorized vehicles are typically produced from polycarbonate, such as for motorcycles, ATVs, golf carts, and small planes and helicopters.
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