Lexan Polycarbonate Sheets are clear and tough

Makrolon Polycarbonate products have a balance of useful features this includes temperature resistance, impact resistance and optical properties position polycarbonates in between commodity plastics and engineering plastics.
Polycarbonate is a very rugged material. Although it offers greater impact-resistance, it possesses low scratch-resistance and thus a hard coating is often applied to polycarbonate eye protection and polycarbonate exterior vehicle equipment. The characteristics associated with polycarbonate are generally comparable to 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 it has better light transmission characteristics than many different types of glass.
Polycarbonate has a glass transition temperature of approximately 150 °C (302 °F), as a result it softens slowly above this point and flows above about 300°C (572 °F). Tools need to be held at higher temperatures, generally above 80 °C (176 °F) to make strain- and stress-free products.
Unlike most other thermoplastics, polycarbonate can undergo dramatic deformations without cracking. Subsequently, it may be processed and formed   without needing to be heated using sheet metal techniques, such as forming bends with a brake. Even for 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 needed, which can not be created from sheet metal. Understand that PMMA/Plexiglas, that is certainly similar in looks to polycarbonate, but it's brittle and cannot be bent at room temperature.
Polycarbonate is commonly found in eye protection, in addition to other projectile-resistant see through applications that would normally indicate the use of glass, but require much higher impact-resistance. Many kinds 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 commonly crafted from polycarbonate, such as for motorcycles, ATVs, golf carts, and small planes and helicopters.

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