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    • 5. 发明授权
    • Continuous production of acrylonitrile filaments and fibers from
spinning material of low residual solvent content
    • 由纺丝材料连续生产丙烯腈长丝和纤维,残留溶剂含量低
    • US5013502A
    • 1991-05-07
    • US409550
    • 1989-09-19
    • Ulrich ReinehrRolf-Burkhard HirschHermann Josef JungverdorbenJoachim Dross
    • Ulrich ReinehrRolf-Burkhard HirschHermann Josef JungverdorbenJoachim Dross
    • D01D5/04D01F6/18D01F6/38D01F11/06D02G1/16D02J1/22
    • D01F6/18D01D5/04
    • A process for the production of crimped filaments and fibers of acrylonitrile polymers of copolymers containing at least 40% by weight acrylonitrile units, by dry spinning from highly polar solvents, where the filaments are brought to extremely low solvent contents in the actual spinning tube by a minimum of superheated steam prepared in the absence of water at very high spinning tube temperatures and spinning gas temperatures, but are cooled to low filament temperatures in the spinning tube by application of water or aqueous finishes in a quantity equivalent to more than 10% by weight moisture. In this way, spun PAN filaments of good natural color are safely obtained, in which there is no washing stage and no drying stage. Acrylic fibers and filaments combining a vacuolestable structure with a very high degree of whiteness and gloss are thus obtained with densities of at least 1.180 g/cm.sup.3, giving shrinkage-free to high-shrinkage fibers, depending on the aftertreatment applied.
    • 一种制备卷曲长丝的纤维和含有至少40重量%丙烯腈单元的共聚物的丙烯腈聚合物的方法,通过从极性极性溶剂中干燥纺丝,其中丝线在实际纺丝管中达到极低的溶剂含量 在纺丝管温度和纺丝气体温度非常高的条件下,在不存在水的情况下制备的最小过热蒸汽,但是通过施加相当于10重量%以上的水或水性表面处理,在纺丝管中冷却至低丝温度 湿气。 以这种方式,可以安全地获得具有良好天然色彩的纺丝PAN丝,其中没有洗涤阶段并且没有干燥阶段。 因此,获得具有至少1.180g / cm 3的密度的具有非常高的白度和光泽度的可空泡结构的丙烯酸纤维和长丝,根据所施加的后处理,使高收缩纤维无收缩。