| 摘要 |
PURPOSE:A solution of a copolymer obtained from acrylonitrile and meth acrylonitrile at a specific ratio is extruded into filaments, washed with water, drawn and set under tension with dry heat at elevated temperature to give the titled fiber with highly improved alkali and heat resistance. CONSTITUTION:A copolymer from (A) acrylonitrile, (B) 0.5-30wt% of meth acrylonitrile and (C), when necessary, a vinyl monomer which is copolymerizable with component A is dissolved in a solvent to prepare a spinning dope. Then, the dope is extruded into fibers and the fibers are washed with water, drawn, dried and set with dry heat at 150-250 deg.C under a tension, preferably less than 5% elongation to give the objective fibers with a filament strength over 6g/d and an initial modulus over 850kg/mm<2>. |
