| 摘要 |
PURPOSE:To prevent the welding of adjacent pitch fibers in infusibilization process, by attaching solid lubricant powder to melt-spun pitch fibers and infusibilizing the treated pitch fibers. CONSTITUTION:An optically anisotropic pitch composed of coal tar pitch, petroleum pitch, etc., is melt-spun to obtain pitch fiber strand or tow. The pitch fiber strand or tow is dipped in a dispersion liquid containing powder of a solid lubricant preferably graphite, fluorinated graphite or boron nitride, etc., to attach the solid lubricant powder to the pitch fiber. The treated pitch fiber is infusibilized to prevent the mutual welding of the pitch fibers. Preferably, the particle diameter of the solid lubricant powder is about 0.5-5mu and the solid lubricant is applied in the form of a dispersion in water or in a solvent.
|
