| 摘要 |
PURPOSE:To manufacuture a flameproofing fiber having high tensile strength and elongation and excellent applicability to flameproof clothes, etc., by carrying out the flameproofing treatment and the shrinkage treatment of an acrylonitrile fiber under specific condition. CONSTITUTION:An acrylonitrile fiber is subjected to (1) the flameproofing treatment in an oxidizing atmosphere, e.g. in air, O2, HCl, etc. at 200-400 deg.C to an equilibrium water-content of 6.5-15%, and then (2) the shrinkage treatment in steam or hot water at <=150 deg.C preferably for 1min-2hr to effect shrinkage of 0.5-20%.
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