| 摘要 |
PURPOSE:A spinning dope of acrylonitrile-containing high shrinkage component and another dope of low shrinkage component are prepared and they are subjected to wet spinning of side-by-side conjugation, further drawing and heat treatment under relaxation to give the titled fiber having pilling-resistant and crimp-developing properties. CONSTITUTION:(A) A spinning dope of high shrinkage component containing 85wt% or more acrilonitrile and (B) another spinning dope of low shrinkage component containing 85wt% or more acrilonitrile are prepared so that their viscosity becomes 50-100 poise, preferably 80-100 poise at 50 deg.C. Then, both dopes are subjected to wet spinning of side-by-side conjugation and the resultant fiber is drawn at a ratio of 3.0-5.0 in hot water, dried and heat-treated under relaxed state in a saturated steam of 1.3-20kg/cm<2>G to give the objective fiber of 1.8-2.6g/d tensile strength, 20-35 crimp developing force calculated as a product of node strength and node elongation.
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