Polycarbonate plastic materials have a great blend of helpful features including temp resistance, impact resistance and optical properties position polycarbonates in between commodity plastics and engineering materials.
Polycarbonate is a very sturdy material. Whilst it offers higher impact-resistance, it possesses minimal scratch-resistance and so a hard coating is often applied to polycarbonate eye wear lenses and polycarbonate exterior automobile components. The characteristics associated with polycarbonate are similar to those of common Acrylic materials, but 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 it has better light transmission characteristics than several types of glass.
Polycarbonate has a glass transition temperature near 150 °C (302 °F), in order that it softens slowly above this point and flows above about 300°C (572 °F). Tools ought to be held at higher temperatures, generally above 80 °C (176 °F) to produce strain- and stress-free products.
Unlike many thermoplastics, polycarbonate can undergo dramatic deformations without breaking or cracking. Therefore, it is sometimes processed and formed at room temperature using standard sheet metal techniques, which include 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 can't be created from sheet metal. Note that PMMA/Plexiglas, that is certainly similar in looks to polycarbonate, but it's brittle and can't be bent unless it is heated.
The light weight of polycarbonate, as opposed to glass, has led to development of electronic display screens that replace the traditional glass with polycarbonate, for use in mobile and portable devices. Such displays include newer e-ink and some LCD screens, though CRT, plasma screen and other LCD technologies still generally require glass for its higher melting temperature and its ability to be etched in finer detail.
Other types of items produced from Polycarbonate include durable, lightweight luggage, MP3/digital audio player cases, computer cases, riot shields, instrument panels, and common style blender jars. Many toys and hobby goods are made from 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 could be needed. This can be a coating (e.g. for improved abrasion resistance), or a coextrusion for enhanced weathering resistance.
Bayer Makrolon Polycarbonate is a thermoplastic that starts as a solid material in the form of small pellets. In a manufacturing process called injection molding, these small pellets are heated until they melt. This liquid polycarbonate is then rapidly injected into a mold, compressed under high pressure and cooled to form a finished product in a matter of minutes.
mercredi 21 avril 2021
Covestro Makrolon Polycarbonate Flat Sheet are clear and tough
