| 摘要 |
PROBLEM TO BE SOLVED: To provide a carbon fiber that has a surface uniformly treated by electrolytic oxidation and excellent surface adhesiveness, and to provide a method for producing the same. SOLUTION: The method for producing a carbon fiber includes applying a voltage between a traveling carbon fiber as a positive terminal and a negative terminal by an electrolytic oxidation apparatus having an electrolytic bath 3 storing an electrolyte 7, a positive terminal roller 11 arranged above the water surface of the electrolyte 7, immersion rollers 13 and 15 for continuously immersing a carbon fiber 9 passed from the positive terminal roller in the electrolyte in the electrolytic bath, a guide roller 17 that pulls up the carbon fiber 9 from the electrolyte 7 and is arranged above the water surface of the electrolyte, the negative terminal 5 that is immersed in the electrolyte 7 in the electrolytic bath 3 and arranged on the rear side of a bath immersion position A to the electrolyte of carbon fiber in the traveling direction of carbon fiber and carrying out electrolytic oxidation of carbon fiber in a surface treatment electric quantity in a range of 3 C/g-8.5 C/g. The carbon fiber obtained by the method is a carbon fiber having a reduced treatment unevenness between the inside and the outside of fiber bundle and having a high impregnation with a matrix resin. COPYRIGHT: (C)2009,JPO&INPIT
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