| 摘要 |
<p>An object of the present invention is to provide a precursor fiber for a high-grade carbon fiber which is less likely to cause fuzz without impairing the productivity. The carbon fiber precursor fiber has a weight average molecular weight, M w (F), of 200,000 to 700,000 and a degree of polydispersity, M Z (F)/M w (F) (M Z (F) indicates the Z-average molecular weight of the fiber), of 2 to 5. Also, a process for producing the carbon fiber precursor fiber according to the present invention provides a process for producing the carbon fiber precursor fiber. In addition, an object of the present invention is to produce a high-grade and high-quality carbon fiber while suppressing fuzz and fiber breakage even under oxidation-carbonization conditions including a high tension or high stretch ratio without impairing the productivity. The process for producing the carbon fiber according to the present invention is a process for producing a carbon fiber using the carbon fiber precursor fiber. Furthermore, the carbon fiber according to the present invention is a carbon fiber in which a crystallite size and parameters concerning a carbon fiber surface, the parameters determined by Raman spectroscopy, satisfy a specific relationship.</p> |
