| 摘要 |
PROBLEM TO BE SOLVED: To provide acrylonitrile-based precursor fibers for carbon fibers in order to obtain the carbon fibers having high strength developing properties, particularly high CAI (compressive strength remaining after impact) as a composite material used for aircraft. SOLUTION: The acrylonitrile-based precursor fibers for the carbon fibers have an arithmetic mean roughness Ra of a contour curve in a direction parallel to the fiber axis of 3.0-10.0 nm. COPYRIGHT: (C)2009,JPO&INPIT
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