High-Clarity, High-Heat PC Copolymers
Sabic has unveiled a new line of high-clarity, high-heat, injection moldable polycarbonate copolymer resins. Lexan CXT resins can offer a unique balance of high temperature resistance, high flow and excellent color stability under extreme molding conditions, together with a high refractive index.
According to the manufacturer, th new resins can be used in optical applications in the electronics, consumer & industrial, and healthcare industries. Typical products in the first two areas include lenses and small sensors that detect visible light; in healthcare, the materials answer the call for excellent optical quality and the ability to resist high temperatures involved, for example, when over-molding clear face shields with silicone rubber.
Global industry trends such as miniaturization and the need to integrate more functions into less space are driving a growing demand for the level of performance offered by Lexan CXT resins. With Vicat B120 softening temperatures as high as 190°C and glass transition temperatures (Tg) of up to 195°C, Lexan CXT resins can provide converters with the potential to injection mold parts that can withstand demanding assembly processes, such as cold reflow or wave soldering onto printed circuit boards. Parts will also stand up to prolonged exposure to high service temperatures.
Lexan CXT resins, which can have a refractive index (RI) over 1.6 as well as high transparency (greater than 89% in the visible and infrared spectra at a thickness of 1 mm), can help enable the production of very small lenses (such as those used in mobile phones) that can be assembled onto a PCB that then goes through various soldering operations. The very good thermal stability of the Lexan CXT resins can help prevent deformation or discoloration.
SABIC Saudi Basic Industries Corporation
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