Bayer Makrolon Polycarbonate Flat Sheet are clear and tough

Makrolon Polycarbonate materials offer a great blend of helpful features including temp resistance, impact resistance and optical properties position polycarbonates in between commodity plastics and engineering plastics.
Polycarbonate is a very rugged material. Whilst it has extraordinary impact-resistance, it has minimal scratch-resistance and thus a hard coating can be applied to polycarbonate eyeglasses lenses and polycarbonate exterior automobile components. The characteristics of polycarbonate are generally similar those of polymethyl methacrylate (PMMA, acrylic), although polycarbonate 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 has better light transmission characteristics than most grades of glass.
Polycarbonate carries a glass transition temperature near 150 °C (302 °F), as a result it softens slowly above this point and flows above about 300°C (572 °F). Tools will have to be held at higher temperatures, generally above 80 °C (176 °F) to produce strain- and stress-free products.
Unlike almost all other thermoplastics, polycarbonate can undergo large changes in basic shape without breaking or cracking. Therefore, it may be processed and formed   without needing to be heated 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 attractive prototyping applications where transparent or electrically non-conductive parts are required, which should not be created from sheet metal. Remember that PMMA/Plexiglas, which is similar in looks to polycarbonate, but it is brittle and can't be bent without heating.
Polycarbonate is frequently found in eye protection, and also in other projectile-resistant viewing and lighting applications that would normally be thought of as requiring the use of glass, but require much higher impact-resistance. Many kinds of lenses are created from polycarbonate, including automotive headlamp lenses, lighting lenses, sunglass/eyeglass lenses, swimming and SCUBA goggles, and safety glasses for use in sporting helmets/masks and police riot gear. Windscreens in small motorized vehicles are typically crafted from polycarbonate, such as for motorcycles, ATVs, golf carts, and small planes and helicopters.

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