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    • 6. 发明授权
    • Novel filament-like fibers and bundles thereof, and novel process and
apparatus for production thereof
    • 新颖的丝状纤维及其束,以及用于生产它的新颖工艺和装置
    • US4355075A
    • 1982-10-19
    • US133288
    • 1980-03-24
    • Susumu NorotaTsutomu KiriyamaTadashi ImotoToshinori Azumi
    • Susumu NorotaTsutomu KiriyamaTadashi ImotoToshinori Azumi
    • D01D5/20D01D5/253D02G3/00
    • D01D5/30D01D5/20D01D5/253Y10T428/2913Y10T428/2922Y10T428/2929Y10T428/2973Y10T428/2976Y10T428/2978
    • A novel filament composed of at least one thermoplastic synthetic polymer, said filament being characterized by having (1) an irregular variation in the size of its cross section along its longitudinal direction, and (2) a coefficient of intrafilament cross-sectional area variation [CV(F)] of 0.05 to 1.0; and a novel bundle of said filament. The bundle of filament-like fibers can be produced by extruding a melt of a thermoplastic synthetic polymer through a spinneret having numerous small openings, which comprises extruding said melt from said spinneret, said spinneret having such a structure that discontinuous elevations are provided between adjacent small openings on the extruding side of the spinneret, and the melt extruded from one opening can move to and from the melt extruded from another opening adjacent thereto or vice versa through a depression existing between said elevation; and taking up the extrudates from the small openings while cooling them by supplying a cooling fluid to the extrusion surface of said spinneret or its neighborhood, whereby said extrudates are converted into numerous separated fine fibrous streams and solidified.
    • 一种由至少一种热塑性合成聚合物组成的新型细丝,所述长丝的特征在于具有(1)沿着其纵向方向的横截面尺寸的不规则变化,和(2)内部纱线横截面积变化系数[ CV(F)]为0.05〜1.0; 和所述细丝的新颖的束。 长丝状纤维束可以通过将热塑性合成聚合物的熔体挤出通过具有许多小孔的喷丝板来制造,该喷丝头包括从所述喷丝头挤出所述熔体,所述喷丝头具有这样的结构,即在相邻的小孔之间设置不连续的高度 在喷丝头的挤出侧上的开口,从一个开口挤出的熔体可以移动到从与其相邻的另一开口挤出的熔体或反之亦然,通过存在于所述高度之间的凹陷; 并且通过向所述喷丝头或其附近的挤出表面供应冷却流体来冷却它们从小开口处取出挤出物,由此将所述挤出物转化成许多分离的细纤维流并固化。