| abstract |
PURPOSE: To produce a carbon fiber having improved adhesivity to matrix material, easily, by applying a coating material to raw carbon fiber at an arbitrary stage before calcination stage, calcining the coated fiber and carrying out the plasma-treatment of the fiber in an oxidizing gas atmosphere. n CONSTITUTION: A coating material (preferably amorphous carbon precursor) is applied to a raw carbon fiber at an arbitrary stage before the calcination stage (e.g. spinning stage, combining stage, preliminary carbonization stage, etc.) in an amount to give a coating layer having a thickness of preferably 100ÅW0.05μ. The coated fiber is subjected to plasma-treatment in an oxidizing gas atmosphere (e.g. oxygen gas) to effect the surface-treatment of carbon fiber. n COPYRIGHT: (C)1987,JPO&Japio |