Covestro Makrolon Polycarbonate Flat Sheet are considered unbreakable

Bayer Makrolon Polycarbonate products offer a unique balance of beneficial features this includes temperature resistance, impact resistance and optical properties position polycarbonates between commodity plastic materials and engineering plastic materials.
Polycarbonate is a very high quality material. Though it offers significant impact-resistance, it’s got low scratch-resistance and thus a hard coating is applied to polycarbonate eyewear as well as polycarbonate exterior auto equipment. The characteristics associated with polycarbonate are generally similar those of polymethyl methacrylate (PMMA, acrylic), except 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 has a glass transition temperature of about 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 high temperatures, generally above 80 °C (176 °F) to make strain- and almost stress free products.
Unlike most thermoplastics, polycarbonate can undergo large shape changes without breaking. Because of that, for small changes in shape, it can be processed and formed   at room temperature using sheet metal techniques, which include forming bends on a brake. Even for 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 crucial, which can not be crafted from sheet metal. Be aware that PMMA/Plexiglas, that is similar in looks to polycarbonate, but it is brittle and cannot be bent with out a heating process.
Polycarbonate is often used in eye protection, in addition to other projectile-resistant optical type applications that would normally require the use of glass, but require higher impact-resistance. Several types 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 typically made of polycarbonate, such as for motorcycles, ATVs, golf carts, and small planes and helicopters.

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