| 摘要 |
PURPOSE:To obtain the titled fiber having excellent collectability, suitable as a filler for fiber-reinforced molding material, giving a fiber chip having excellent workability, etc., and producible without using an organic solvent, by treating the surface of a polyamide resin granule with a surfactant, and using the treated resin as a collecting agent. CONSTITUTION:Granular polyamide resin surface-treated with a surfactant (preferably a nonionic surfactant such as poval) is used as a collecting agent, and carbon fibers are collected with 0.1-10wt% above agent to obtain the objective collected fiber bundle. The fiber bundle is cut usually to 1-10mm long by conventional method to obtain short carbon fiber chips having a bulk density of >=300g/l and an angle of repose of <=50 deg.. The polyamide resin is preferably a nylon terpolymer resin because of its low melting point and high emulsifiability.
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