Lexan Polycarbonate Sheets are considered unbreakable

Polycarbonate plastic materials give you a great blend of helpful features which include high temperature resistance, impact resistance and optical properties position polycarbonates in between commodity plastic materials and engineering materials.
Polycarbonate is a very long-lasting material. Even though it offers increased impact-resistance, it's got reduced scratch-resistance and thus a hard coating is often applied to polycarbonate eyeglasses lenses as well as polycarbonate exterior automotive components. The properties relating to polycarbonate tend to be similar those of polymethyl methacrylate (PMMA, acrylic), yet , polycarbonate 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 has better light transmission characteristics than several types of glass.
Polycarbonate has a glass transition temperature of around 150 °C (302 °F), as a result it softens slowly above this point and flows above about 300°C (572 °F). Tools should be held at warm to high temperatures, generally above 80 °C (176 °F) in order to make strain- and stress-free products.
Unlike almost all other thermoplastics, polycarbonate can undergo large changes in basic shape without breaking or cracking. Subsequently, it can be processed and formed   cold using standard sheet metal techniques, which include forming bends with a brake. Even for 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 essential, which can not be produced from sheet metal. Keep in mind that PMMA/Plexiglas, that is certainly similar in looks to polycarbonate, but it is brittle and cannot be bent with out a heating process.
Polycarbonate is often utilized in eye protection, and also in other projectile-resistant see through or lighting applications that would normally indicate the use of glass, but require much greater 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 manufactured from polycarbonate, such as for motorcycles, ATVs, golf carts, and small planes and helicopters.

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