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    • 11. 发明授权
    • Process for producing cross-sectionally stable, hygroscopic fibers and
filaments having a core-jacket structure
    • 用于生产横截面稳定的吸湿纤维和具有芯 - 夹套结构的细丝的方法
    • US4438060A
    • 1984-03-20
    • US210467
    • 1980-11-24
    • Ulrich ReinehrToni HerbertzHermann-Josef Jungverdorben
    • Ulrich ReinehrToni HerbertzHermann-Josef Jungverdorben
    • D01D5/247D01D5/34D01F1/08D01F6/18D01F6/54
    • D01F6/18D01D5/247D01D5/34D01F1/08Y10T428/2975
    • Hygroscopic filaments or fibers with a core-jacket structure of hydrophobic, filament-forming synthetic polymers having a water retention capacity of at least 10% and having uniform round to oval cross-sectional profiles are obtained by a dry-spinning process which comprises addition of a substance to the spinning solvent which(a) has a higher boiling point than the spinning solvent used,(b) is readily miscible with the spinning solvent and with water,(c) is a non-solvent for the polymer to be spun,and addition of another substance which(a) is soluble in the non-solvent for the polymer to be spun,(b) is soluble in the solvent for the polymer(c) remains dissolved in the non-solvent for the polymer during solidification of the filaments,(d) is insoluble in water, and(e) does not evaporate to any significant extent during the spinning process,to the system in quantities of at least 1% by weight, based on polymer solids/spinning solvent/non-solvent carrying out the spinning process in such a way that the non-solvent does not evaporate to any significant extent in the spinning duct and washing out the non-solvent from the solidified filaments.
    • 通过干纺丝方法获得吸水性长丝或具有疏水的长丝形成合成聚合物的芯 - 夹层结构的纤维,其具有至少10%的保水能力并且具有均匀的圆形至椭圆形横截面轮廓,其包括添加 (a)沸点比所使用的纺丝溶剂高的纺丝溶剂的物质,(b)易与纺丝溶剂和水混溶,(c)是纺丝聚合物的非溶剂, 和(a)可溶于用于纺丝聚合物的非溶剂中的另一物质,(b)可溶于聚合物(c)的溶剂中,溶于固化的聚合物的非溶剂中 长丝(d)不溶于水,(e)在纺丝过程中不会以至少1重量%的量以体积计,以聚合物固体/纺丝溶剂/非纺丝方式蒸发至体系, 溶剂进行纺丝过程 ss,使得非溶剂在纺丝管中不会蒸发到任何显着程度,并从固化的丝中洗出非溶剂。
    • 15. 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。