| 摘要 |
PROBLEM TO BE SOLVED: To provide a carbon fiber bundle capable of exhibiting good interfacial adhesion to a polyolefin-based resin, especially, to a polypropylene resin. SOLUTION: This carbon fiber bundle has a plurality of single fibers, wherein each of the single fibers has a plurality of wrinkles on its surface so that a difference of elevation between a highest part and a lowest part of the wrinkles is not less than 40 nm in a region surrounded by sides having a length of 2μm in the circumferential direction of the fiber and sides having a length of 1μm in the longitudinal direction, and the carbon fiber bundle is subjected to sizing treatment with a sizing agent containing a polypropylene-based resin (A) which is modified with unsaturated dicarboxylic acids in an amount of 1-20 wt% and has an intrinsic viscosity [η] of 0.02-1.3 dl/g, so that the polypropylene-based resin (A) is contained in an amount of 0.1-5 wt% based on the total weight of the bundle. COPYRIGHT: (C)2005,JPO&NCIPI |
