Polycarbonate plastic materials give you a unique balance of helpful features this includes temp resistance, impact resistance and optical properties position polycarbonates between commodity plastic materials and engineering materials.
Polycarbonate is a very sturdy material. Even though it offers extraordinary impact-resistance, it possesses a lower scratch-resistance and thus a hard coating can be applied to polycarbonate eye protection and polycarbonate exterior auto equipment. The properties of polycarbonate are generally similar to those of common Acrylic materials, except polycarbonate is always 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 many different types of glass.
Polycarbonate carries a glass transition temperature of approximately 150 °C (302 °F), therefore it softens gradually above this point and flows above about 300°C (572 °F). Tools need to be held at higher temperatures, generally above 80 °C (176 °F) to produce strain- and almost stress free products.
Unlike almost all other thermoplastics, polycarbonate can undergo large deformations without breaking. As a result, it could be processed and formed cold using standard 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 attractive prototyping applications where transparent or electrically non-conductive parts are crucial, which may not be made from sheet metal. Keep in mind that PMMA/Plexiglas, that is similar in looks to polycarbonate, but it is brittle and can't be bent without heating.
The light weight of polycarbonate, in contrast to glass, has led to development of electronic touch screens that replace glass materials with polycarbonate, for use in mobile and portable devices. Such displays include newer e-ink and several LCD screens, though CRT, plasma screen and other LCD technologies which still do require glass for its higher melting temperature and its ability to be etched in finer detail.
Other types of items fabricated from Polycarbonate include durable, lightweight luggage, MP3/digital audio player cases, computer cases, police riot shields, instrument panels, and blender jars. Many toys and hobby products are made of polycarbonate parts, e.g. fins, gyro mounts, and flybar locks for use with radio-controlled helicopters.
For use in applications exposed to weathering or UV-radiation, a special surface treatment maybe needed. This may be a coating (e.g. for improved abrasion resistance), or a coextrusion for enhanced weathering resistance.
The Makrolon Polycarbonate is a thermoplastic that begins as a solid material in the form of small pellets. In a manufacturing process called injection molding, the pelletized resin is heated until they begin to melt. This liquid polycarbonate is then rapidly pushed into the mold - shaped like the part, compressed under high pressure and cooled to create a finished product in less than a minute.
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