Carbon fibre in 1969: Rolls-Royce Hyfil

Carbon fibre (C (turbostratic graphite)) is a family of grades whose density ~1.8 g/cm³ fibre, heat band sublimes; resin burns, and fire letter fibre A1-ish; CFRP follows the matrix. Carbon fibre is sold as grades, not as a single substance. Chemistry C (turbostratic graphite), density ~1.8 g/cm³ fibre, heat band sublimes; resin burns.

This atlas treats Carbon fibre as a system: mill route, coatings, tests and the cavity it sits in. Conductivity note: high along fibre; low through-thickness in composites. Insulation score 24/100 is relative to 32 entries — metals lose, VIPs and aerogels win. Fire letter in editorial use: fibre A1-ish; CFRP follows the matrix. Do not equate A1 with “safe in a blaze” or E with “illegal”. Assemblies decide.

Origin: Edison carbon filament; Shindo/Watt 1960s PAN, Japan / UK / US. The process chapter follows feedstock → conversion → forming → finish → install. Uses span buildings to defence / safety. Pairings matter: graphene. Circularity mark 26/100. Ask which scrap, which certificate, which year.