Cracking manner of the vapor phase modulo carbon fiber and production manner of the vapor phase modulo carbon fiber which is cracked, the vapor phase modulo carbon fiber and contain that the resin constituent and the application null

摘要

PPROBLEM TO BE SOLVED: To provide a carbon fiber made by a vapor phase method, providing excellent conductivity when formed into a composite material with a resin, and providing the composite material having almost no protrusion on the surface. PSOLUTION: The carbon fiber made by the vapor phase method, and containing agglomerates having ≥5 μm diameter in an amount regulated so that the proportion of the projected areas of the agglomerates may be ≤5 area% is produced by feeding the aggregated and graphitized carbon fiber of a starting material, made by the vapor phase method to a jet mill so that the contained dust concentration may be 0.1-10 g/mSP3/SP, and driving the jet mill while regulating the number of rotation of the rotor within the range of 7,000-11,000 rpm to collide the agglomerates to each other without adding a shear force or a compression force. PCOPYRIGHT: (C)2007,JPO&INPIT