| 摘要 |
PURPOSE:Carbonaceous pitch is melt-extruded into filaments, and the bundle is loosened as it is dipped in a solution by the completion of preoxidation or precarbonization, then preoxidized, precarbonized, carbonized or graphitized to produce the titled fiber of good appearance, high strength and elasticity in high efficiency. CONSTITUTION:Carbonaceous pitch is melt-extruded into filaments and they are preoxidized, precarbonized, then carbonized or graphitized wherein the carbonaceous pitch fiber wound around a bobbin, preoxidized filaments, or precarbonized filaments are dipped in a solution partially or wholly as they are unwound. Then, the dipped filaments are roasted to effect preoxidation, precarbonization, carbonization or graphitization to give the objective filaments. The dipping solution is prepared by dilution a silicone oil with a viscosity of 10-1,000cst at 25 deg.C with another silicone oil and/or an alcohol boiling at 160 deg.C or lower into 0.01-50wt% concentration.
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