| 摘要 |
A continuous wet-spinning method for producing a useful filamentary material, such as multi-filaments or a tow, from a spinning solution of an acrylonitrile copolymer in an aqueous saline solvent consisting essentially of zinc chloride. In this method, an aquagel filamentary material obtained by spinning the spinning solution is taken up from an aqueous coagulating bath, continuously stretched in water and continuously dried so as to form a dried filamentary material having a moisture content of less than 5 weight percent and a transparency of at least 70 percent, measured under specific conditions. Subsequently, the dried filamentary material is continuously relaxed under a tension of at least 2 mg. per denier in substantially saturated steam at a temperature, X( DEG C), such that the following expression is satisfied: 55 log Y + 5M - 417 </= X </= 100 log Y + 5M - 434 wherein 160 DEG C </= x </= 100 DEG C, 45 percent </= Y </= 15 percent and Y is the percent of shrinkage.
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