Covestro Makrolon Polycarbonate Flat Sheet are considered unbreakable

Bayer Makrolon Polycarbonate products offer a unique balance of beneficial features including 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. Whilst it has greater impact-resistance, it has a lower scratch-resistance and thus a hard coating can be applied to polycarbonate eye protection as well as polycarbonate exterior automotive components. The characteristics associated with polycarbonate are along the lines of those of Acrylic PMMA materials, but polycarbonate is going to be 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 carries 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 ought to be held at higher temperatures, generally above 80 °C (176 °F) to help with making strain- and reduced stress products.
Unlike almost all other thermoplastics, polycarbonate can undergo dramatic changes in basic shape without cracking or breaking. For this reason, for small changes in shape, it can be processed and formed   at room temperature using standard sheet metal techniques, for example forming bends with a brake. Even for sharp angle bends having a tight radius, no heating is usually necessary. This makes it valuable in prototyping applications where transparent or electrically non-conductive parts are necessary, which should not be created from sheet metal. Understand that PMMA/Plexiglas, which is similar in looks to polycarbonate, but it is brittle and cannot be bent unless it is heated.
Polycarbonate is commonly used in eye protection, in addition to other projectile-resistant optical type applications that would normally require the use of glass, but require much greater 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 visors for use in sporting helmets/masks and police riot gear. Windscreens in small motorized vehicles are commonly made of polycarbonate, such as for motorcycles, ATVs, golf carts, and small planes and helicopters.

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