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Two new glass fiber-reinforced PBT compounds have been developed for the enclosure covers of next-generation radar units of advanced driver assistance systems (ADAS). Launched by SABIC recently, LNP Thermocomp WFC06I and WFC06IXP compounds, are geared for the front and back enclosure covers, respectively. These PBT grades reportedly offer a very low dissipation factor (Df) and dielectric constant (Dk) to help support the transmission of higher-frequency radar signals.

These PBT grades also boast super-low warpage that allows designers to potentially create new, thinner covers that improve signal transmission and minimize side cones of the signal beam for improved image quality. In addition, these compounds reportedly provide higher ductility for improved impact resistance, and equivalent moisture and chemical resistance vs. incumbent PBT materials.

Moreover, they can contribute to efficient radar unit assembly by supporting high-speed, high-precision laser welding. Laser welding of plastic components offers advantages including the ability to produce miniaturized and highly intricate parts and eliminate consumables such as adhesives and fasteners. Precise, strong welds can protect sensitive electronics against dust and moisture. Thermocomp WFC06I compound for radar front covers features a laser transmission rate of over 60% --29% higher than the nearest competitor’s. Customers can use its wide laser window and low laser power to potentially increase yield rates. Meanwhile, Thermocomp WFC06IXP compound – acts as the absorbing layer for laser welding.