Pitch Precursor (Mesophase Pitch)

Pitch precursor—particularly anisotropic mesophase pitch derived from coal tar or petroleum pitch—is melt-spun into fibre that, after oxidisation and high-temperature carbonisation/graphitisation, yields high-modulus and ultra-high-modulus carbon fibres. Compared with PAN-based fibres, pitch-based grades typically offer higher elastic modulus and thermal conductivity but lower tensile strength and strain-to-failure, making them suited to stiffness-critical, vibration-sensitive or thermal-management composite structures rather than primary crash members. Automotive and mobility uses remain selective: driveshaft concepts, high-end audio/structural inserts, thermal spreaders, and specialised aerospace-derived components. Global pitch-fibre capacity is much smaller than PAN capacity and is concentrated among a handful of producers in Japan and the United States. This record covers the mesophase pitch precursor intermediate, not finished pitch-based carbon fibre fabrics or laminates.