PROCESS FOR PRODUCING CARBON NANOFIBER, CARBON NANOFIBER, PROCESS FOR PRODUCING CARBON FIBER COMPOSITE MATERIAL FROM CARBON NANOFIBER, AND CARBON FIBER COMPOSITE MATERIAL

摘要

A process for carbon nanofiber production which includes the step of pulverizing untreated carbon nanofibers produced by the gas-phase growth method. In the pulverization step, the untreated carbon nanofibers are pulverized so as to have a tap density 1.5-10 times that of the carbon nanofibers before pulverization. Also provided is a process for carbon fiber composite material production which includes a step in which carbon nanofibers (40) are mixed with an elastomer (30) and are evenly dispersed in the elastomer (30) by means of shearing force to obtain a carbon fiber composite material.