| 摘要 |
PROBLEM TO BE SOLVED: To provide a carbon fiber strand having high impregnating properties of a resin and a high NOL-ring strength, etc., when converted into a composite material. SOLUTION: The carbon fiber strand provides≥0.3 value of PO obtained by substituting a void volume A (ml/g) of the carbon fiber strand corresponding to 0.3-50μm pore diameter determined by measuring the pore diameter with a mercury porosimeter into formula (1) PO=A×B/(C/12,000)×(5/D) (1) [wherein, B is the yield (g/m) of the carbon fiber strand; C is the number of single filaments of the carbon fiber strand; and D is the single filament diameter (μm) of the carbon fiber strand]. A method for producing the carbon fiber strand is provided. COPYRIGHT: (C)2004,JPO
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