Lexus International has published an article about the RC F’s carbon fiber and how it’s made:
Examine a unit of carbon under a microscope and you’ll find the material to be an extremely fine acrylic fiber measuring only several micrometers (a unit of length equal to one thousandth of a millimeter) in diameter. Depending on the strength of the material required, anywhere between 3,000 and 24,000 of these fine threads are bundled together to form a tow, and numerous tows are woven into a carbon fabric, similar to a yarn.
The engine hood and the roof are formed from four 0.5-millimeter-thick carbon sheets machine-pressed together at 140 degrees Celsius. The rear spoiler 03 consists of two different materials, carbon and fiberglass, and becomes beneficial when the car exceeds 50mph.
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