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    • 8. 发明授权
    • Process for producing wholly aromatic polyamide fibers
    • 制备全芳族聚酰胺纤维的方法
    • US4073837A
    • 1978-02-14
    • US607790
    • 1975-08-26
    • Keiji KouzaiYutaka TabeEiji MasunagaKichiro Matsuda
    • Keiji KouzaiYutaka TabeEiji MasunagaKichiro Matsuda
    • C07D207/26C07D207/267D01F6/60D01F7/00
    • C07D207/267D01F13/04D01F6/605Y02P70/629
    • A process for producing wholly aromatic polyamide fibers by extruding a spinning solution of a wholly aromatic polyamide in an amide solvent into an aqueous coagulating bath containing inorganic salts, said process comprising feeding an aqueous coagulating liquid containing calcium chloride and having an amide solvent concentration of not more than 3% by weight to the vicinity of a spinneret, flowing the coagulating liquid in said bath at an average velocity not more than 0.1 time the velocity of yarn take-up in the yarn advancing direction, discharging the coagulating liquid having an amide solvent concentration of not less than 4% by weight from said bath, treating the coagulating bath with an organic solvent consisting substantially of methylene chloride, and extracting and recovering the amide solvent from the coagulating liquid.
    • 一种通过在酰胺溶剂中将全芳香族聚酰胺的纺丝溶液挤出到含有无机盐的含水凝固浴中来生产全芳族聚酰胺纤维的方法,所述方法包括进料含有氯化钙的水性凝固液,其酰胺溶剂浓度不为 大于3重量%的喷丝头附近,使凝固液在所述浴中以平均速度不超过纱线在纱线前进方向上卷取速度的0.1倍的速度流动,排出具有酰胺溶剂的凝结液 浓度不低于所述浴的4重量%,用基本上由二氯甲烷组成的有机溶剂处理凝固浴,并从凝固液中提取和回收酰胺溶剂。