Covestro Makrolon Polycarbonate Flat Sheet are clear and tough

Polycarbonate materials offer a unique balance of useful features which include temp resistance, impact resistance and optical properties position polycarbonates in between commodity plastics and engineering materials.
Polycarbonate is a very high quality material. Though it has considerable impact-resistance, it's got low scratch-resistance and so a hard coating typically is applied to polycarbonate eyewear and polycarbonate exterior motor vehicle equipment. The characteristics associated with polycarbonate are generally similar those of polymethyl methacrylate (PMMA, acrylic), but polycarbonate is definitely 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 kinds of glass.
Polycarbonate has a glass transition temperature of about 150 °C (302 °F), as a result it softens gradually above this point and flows above about 300°C (572 °F). Tools will have to be held at warm to high temperatures, generally above 80 °C (176 °F) to make strain- and stress-free products.
Unlike many thermoplastics, polycarbonate can undergo large shape changes without cracking. Hence, it could be processed and formed   without needing to be heated using sheet metal techniques, for instance forming bends with 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 needed, which can not be crafted from sheet metal. Remember that PMMA/Plexiglas, which is similar in appearance to polycarbonate, but it's brittle and can't be bent at room temperature.
Polycarbonate is frequently utilized in eye protection, and also in other projectile-resistant see through applications that would normally indicate 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 glasses for use in sporting helmets/masks and police riot gear. Windscreens in small motorized vehicles are normally manufactured from polycarbonate, such as for motorcycles, ATVs, golf carts, and small planes and helicopters.

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