| 摘要 |
PURPOSE:To improve the bite of carbon fibers into an extruder and to facilitate the dispersion of the fibers in a matrix resin, by crushing a specific wooly carbonaceous fibers and applying a collecting agent thereto to adjust the bulk density of the fiber to a specific range. CONSTITUTION:An aggregate of carbonaceous fibers having a fiber diameter of 0.05-4mum and a length of <=1,000mum, preferably <=500mum and a uniform diameter almost free of branching is impregnated with a collecting agent (e.g. a bisphenol A-type epoxy resin when the matrix is epoxy resin) to adjust the bulk density of the product to 0.1-1.0g/cm<3>. The carbonaceous fiber is composed of graphite layers or carbon layers convertible easily to graphite and arranged concentrically parallel to the fiber axis.
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