Process
Carbon fibers were obtained by polyacrylonitrile fibers, pitch fibers, viscose filament or phenolic fibers by carbonization. More common applications of carbon fiber is mainly polyacrylonitrile carbon fibers and pitch carbon fibers. Carbon fiber manufacturing process includes four fiber spinning, thermal stabilization (pre-oxidation), carbon, graphite, and so on. During chemical changes accompanying include dehydrogenation, cyclization, pre-oxidation, oxidation and deoxidation.

Take the high mechanical properties of carbon fibers made from viscose fibers must be approved by high-temperature tensile graphitization carbonization yield is low, technical difficulties, complex equipment, products mainly for the ablative material and insulation material used; the pitch-based carbon fiber production rich source of raw materials, carbide, high yield, but the raw material complex modulation, low performance, nor to give large-scale development; polyacrylonitrile fiber precursor can be prepared by a high-performance carbon fiber, its production process is relatively simple mechanics other excellent performance since the 1960s, industrial development well in carbon fiber.

PAN-based carbon fiber production including raw silk raw silk production and carbonation two processes.

Raw silk production process includes polymerization, degassing, metering, spinning, traction, washing, oiling, drying and other processes to close wire.

Carbonization process includes discharge wire, pre-oxidation, low temperature carbonization, carbonization temperature, surface treatment, sizing and drying, to close wire winding processes.