| 摘要 |
PURPOSE:To prevent fusion between single yarn during heat treatment, and to obtain the yarn having high physical properties, by subjecting an aromatic polyester showing anisotropy during melting to give yarn, providing the yarn with a basic solution or suspension and heat-treating it. CONSTITUTION:An aromatic polyester which shows anisotropy during melting and has preferably 280-350 deg.C flow temperature is subjected to melt spinning, and wound preferably at 100-2,000m/min. Then the prepared yarn is provided with preferably 0.5-10wt% basic solution or suspension of an alkaline (earth) metallic hydroxide, carbonate, etc., in a preferable pickup of 2-100wt%. The yarn is heat-treated in <=100mmHg vacuum or in an inert gas atmosphere at 280-360 deg.C for several min-10hr, to give the aimed yarn. |
