Lexan Polycarbonate Flat Sheet are considered unbreakable

Makrolon Polycarbonate materials offer a great blend of beneficial features which include temperature resistance, impact resistance and optical properties position polycarbonates between commodity plastic materials and engineering plastics.
Polycarbonate is definitely a rugged material. Although it features significant impact-resistance, it's got lower scratch-resistance and so a hard coating could be applied to polycarbonate eyewear as well as polycarbonate exterior auto equipment. The properties associated with polycarbonate are generally comparable to those of Acrylic PMMA 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 kinds of glass.
Polycarbonate carries a glass transition temperature of approximately 150 °C (302 °F), in order that it softens gradually above this point and flows above about 300°C (572 °F). Tools must be held at higher temperatures, generally above 80 °C (176 °F) to help make strain- and stress-free products.
Unlike most other thermoplastics, polycarbonate can undergo dramatic deformations without breaking or cracking. Due to this fact, for small changes in shape, it can be processed and formed   cold using standard sheet metal techniques, which include forming bends on 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 essential, which should not be crafted from sheet metal. Note that PMMA/Plexiglas, that is certainly similar in appearance to polycarbonate, but it's brittle and cannot be bent unless it is heated.
Polycarbonate is commonly utilized in eye protection, along with other projectile-resistant viewing and lighting applications that would normally be thought of as requiring the use of glass, but require greater impact-resistance. Many kinds of lenses are produced from polycarbonate, including automotive headlamp lenses, lighting lenses, sunglass/eyeglass lenses, swimming and SCUBA goggles, and safety goggles for use in sporting helmets/masks and police riot gear. Windscreens in small motorized vehicles are commonly constructed from polycarbonate, such as for motorcycles, ATVs, golf carts, and small planes and helicopters.

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