Lexan Polycarbonate Flat Sheet are considered unbreakable
Polycarbonate materials have a unique balance of beneficial features which include temp resistance, impact resistance and optical properties position polycarbonates between commodity plastic materials and engineering plastics.
Polycarbonate is a very sturdy material. Although it has increased impact-resistance, it has low scratch-resistance and thus a hard coating can be applied to polycarbonate eye protection lenses and polycarbonate exterior automotive equipment. The properties of polycarbonate are generally similar to that of those of common Acrylic materials, although polycarbonate is actually 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 most grades 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 help with making strain- and reduced stress products.
Unlike most other thermoplastics, polycarbonate can undergo dramatic shape changes without cracking or breaking. For this reason, it may be processed and formed without needing to be heated using sheet metal techniques, such as forming bends on a brake. For even sharp angle bends with a tight radius, no heating is generally necessary. This makes it valuable in prototyping applications where transparent or electrically non-conductive parts are crucial, which should not be made from sheet metal. Please keep in mind PMMA/Plexiglas, which happens to be similar in looks to polycarbonate, but it is brittle and can't be bent unless it is heated.
Polycarbonate is frequently used in eye protection, as well as in other projectile-resistant see through applications that would normally indicate 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 normally made of polycarbonate, such as for motorcycles, ATVs, golf carts, and small planes and helicopters.
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