| 摘要 |
PURPOSE:To obtain active carbon fibers having micropores of pore diameter preferred for use in air cleaners, by suppressing the sulfur content in a heat- treated pitch raw material within a specific range, spinning the resultant pitch raw material, and infusibilizing and activating the resultant fibers. CONSTITUTION:The sulfur content in a pitch raw material heat-treated to give a viscosity and molecular weight suitable for melt spinning is adjusted to <=1wt% for example by using a raw material with an original low sulfur content or desulfurizing a raw material. The resultant raw material is then spun into fibers, which are infusibilized and activated to give the aimed carbon fibers having many micropores of preferably 5-30Angstrom pore diameter.
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