Lexan Polycarbonate Sheeting are considered unbreakable

Polycarbonate plastic materials have a balance of beneficial features which include temperature resistance, impact resistance and optical properties position polycarbonates in between commodity plastic materials and engineering plastic materials.
Polycarbonate is a very sturdy material. Though it has very high impact-resistance, it has low scratch-resistance and so a hard coating may be applied to polycarbonate eye wear as well as polycarbonate exterior vehicle equipment. The characteristics associated with polycarbonate are generally similar to those of Acrylic PMMA materials, yet , 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 many kinds of glass.
Polycarbonate has a glass transition temperature of approximately 150 °C (302 °F), so it softens gradually above this point and flows above about 300°C (572 °F). Tools need to be held at warm to high temperatures, generally above 80 °C (176 °F) to help make strain- and reduced stress products.
Unlike almost all other thermoplastics, polycarbonate can undergo dramatic deformations without cracking. Therefore, it can be processed and formed   without needing to be heated using sheet metal techniques, for instance forming bends with a brake. Even for sharp angle bends with a tight radius, no heating is generally necessary. This makes it attractive prototyping applications where transparent or electrically non-conductive parts are required, which cannot be produced from sheet metal. Understand that PMMA/Plexiglas, that is certainly similar in appearance to polycarbonate, but it is brittle and can't be bent at room temperature.
Polycarbonate is frequently found in eye protection, along with other projectile-resistant optical type 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 visors 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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