Polycarbonate products offer a unique balance of beneficial features which include temperature resistance, impact resistance and optical properties position polycarbonates between commodity plastic materials and engineering plastics.
Polycarbonate is a very high quality material. Though it features very high impact-resistance, it has got low scratch-resistance and so a hard coating typically is applied to polycarbonate eyewear lenses and polycarbonate exterior automotive equipment. The properties relating to polycarbonate are similar to that of those of Acrylic PMMA materials, yet , polycarbonate definitely 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 it has better light transmission characteristics than most grades of glass.
Polycarbonate carries a glass transition temperature near 150 °C (302 °F), therefore it softens gradually above this point and flows above about 300°C (572 °F). Tools ought to be held at high temperatures, generally above 80 °C (176 °F) to help with making strain- and stress-free products.
Unlike many thermoplastics, polycarbonate can undergo dramatic changes in basic shape without cracking. Due to this fact, it could be processed and formed at room temperature using sheet metal techniques, which include forming bends on a brake. For even 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 cannot be produced from sheet metal. Note that PMMA/Plexiglas, which is similar in looks to polycarbonate, but it is brittle and cannot be bent at room temperature.
Polycarbonate is commonly used in eye protection, and also in other projectile-resistant see through or lighting applications that would normally indicate the use of glass, but require much higher impact-resistance. Many different types of lenses are made of 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 normally produced from polycarbonate, such as for motorcycles, ATVs, golf carts, and small planes and helicopters.
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