Lexan Polycarbonate Sheet are clear and tough

Bayer Makrolon Polycarbonate products give you a balance of beneficial features which include temp resistance, impact resistance and optical properties position polycarbonates in between commodity plastic materials and engineering plastics.
Polycarbonate is a very tough material. Whilst it features higher impact-resistance, it possesses minimal scratch-resistance and thus a hard coating is applied to polycarbonate eye protection and polycarbonate exterior motor vehicle equipment. The properties relating to polycarbonate are generally similar to that of those of Acrylic PMMA materials, although polycarbonate is undoubtedly 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 kinds of glass.
Polycarbonate carries a glass transition temperature of approximately 150 °C (302 °F), consequently it softens gradually above this point and flows above about 300°C (572 °F). Tools will have to be held at high temperatures, generally above 80 °C (176 °F) to help make strain- and reduced stress products.
Unlike most thermoplastics, polycarbonate can undergo dramatic deformations without breaking. Due to this fact, for small changes in shape, it can be processed and formed   at room temperature using standard sheet metal techniques, for instance forming bends on a brake. For even sharp angle bends having 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 can not be crafted from sheet metal. Understand that PMMA/Plexiglas, which happens to be similar in appearance to polycarbonate, but it's brittle and can't be bent at room temperature.
Polycarbonate is often found in eye protection, and also in other projectile-resistant viewing and lighting applications that would normally indicate the use of glass, but require higher impact-resistance. Several types of lenses are manufactured 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 normally produced from polycarbonate, such as for motorcycles, ATVs, golf carts, and small planes and helicopters.

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