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How is it made? The raw material used to make carbon fiber is called the precursor. About 90% of the carbon fibers produced are made from polyacrylonitrile (PAN). The remaining 10% are made from rayon or petroleum pitch. All of these materials are organic polymers, characterized by long strings of molecules bound together by carbon atoms.
Not quite. Rayon is derived from plants originally, but is so processed that itâs not as environmentally friendly as plain old bamboo. Hereâs how the FTCâs press release explains the difference: Rayon is a man-made fiber created from the cellulose found in plants and trees and processed with harsh chemicals that release hazardous air pollution. Any plant or tree â including bamboo â could be used as the cellulose source, but the fiber that is created is rayon.