WEB EXCLUSIVE: The new Bugatti Veyron 16.4 Grand Sport combines the looks of an open-top roadster with the dynamics and safety of a closed vehicle. This is made possible by a removable targa top incorporating a transparent panoramic roof of thermoformed Makrolon polycarbonate from Bayer MaterialScience AG (U.S. office in Pittsburgh). This is the first series production application of Bayer’s new range of infrared-absorbing colors for PC. The gray shade chosen for this part filters the sun’s IR rays at least as effectively as the corresponding IR colors for glass, Bayer says, keeping the vehicle’s interior cool. The panoramic roof is made by KRD Sicherheitstechnik GmbH in Geesthacht, Germany. The roof is made from 5-mm solid sheets of Makrolon GP grey 722 from Bayer Sheet Europe GmbH, based on Makrolon AG2677, formulated specifically for automotive glazing. Special extrusion techniques are used to produce sheets free of streaks, distortion, surface flaws, and impurities. KRD prints the sheet with a black border before thermoforming and coating with AS4000 siloxane wet-coat system from Momentive Performance Materials (U.S. office in Albany, N.Y.). The coating provides scratch and weather resistance. Then KRD mills the edges of the sheet and sprays on a PUR edging. The clear roof measures 1230 x 1050 mm and weighs about 5.6 kg, including the PUR edging.
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