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    • 2. 发明授权
    • Novel assembly of composite fibers
    • 复合纤维的新型装配
    • US4414276A
    • 1983-11-08
    • US288202
    • 1981-07-29
    • Tsutomu KiriyamaSusumu NorotaYasuhiko SegawaShingo EmiTadasi ImotoToshinori Azumi
    • Tsutomu KiriyamaSusumu NorotaYasuhiko SegawaShingo EmiTadasi ImotoToshinori Azumi
    • B01F5/06D01D5/30D01D3/00D01D5/10D01D5/20D01D5/28D02G3/04
    • D01D5/253B01F5/0604D01D5/30Y10S264/75Y10T428/2931Y10T428/2973Y10T428/2976Y10T428/2978Y10T428/298
    • An assembly of fibers composed of at least two dissimilar fiber-forming polymers, characterized by the fact that(1) it consists of numerous fibers,(2) at least 90% of said fibers have a non-circular cross-sectional shape,(3) the cross sections of at least 50% of said fibers differ from each other in at least one of shape and size, and(4) at least 50% of said fibers each have in their cross section taken at right angles to the fiber axis at least two side-by-side coalesced blocks of at least two dissimilar fiber-forming polymer phases with at least a part thereof being exposed to the peripheral surface of the fiber, at least one of the number, shape and size of the blocks varying from fiber to fiber. The assembly of fibers can be produced by extruding a molten macroblend composed of many molten phases of at least two dissimilar fiber-forming polymers through a mesh spinneret having many small openings; 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 to its neighborhood, whereby said extrudates are converted into numerous separated fine fibrous streams and solidified; characterized in that said macroblend is prepared by coalescing many distinct molten phases of at least two dissimilar polymers in such a manner that in a phantom cross section of the molten macroblend taken parallel to the spinneret, there exist many effective continuous boundary lines between the molten phases of dissimilar polymers each of which lines has a length larger than one-fourth of the length of a partitioning member which defines one small opening in the spinneret, whereby said many boundary lines are cut with the partitioning members in the spinneret.
    • 由至少两种异纤维形成聚合物组成的纤维组合物,其特征在于:(1)它由许多纤维组成,(2)至少90%的所述纤维具有非圆形横截面形状, 3)所述纤维的至少50%的横截面在至少一种形状和尺寸上彼此不同,和(4)至少50%的所述纤维各自具有与纤维成直角的横截面 轴至少两个并排聚结的至少两个不同纤维形成聚合物相的块,其至少一部分暴露于纤维的周边表面,块的数量,形状和尺寸中的至少一个 从纤维变为纤维。 纤维的组装可以通过将具有许多小孔的网眼喷丝头挤出由至少两种不同纤维形成聚合物的许多熔融相组成的熔融大孔混合物来制造; 并通过将冷却流体供应到所述喷丝头的挤出表面或其附近来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; 其特征在于,所述大型共混物通过以至少两种不同的聚合物的许多不同的熔融相聚结来制备,使得在平行于喷丝头的熔融大混合物的幻影横截面中,在熔融相之间存在许多有效的连续边界线 不同的聚合物,其中每条线的长度大于在喷丝板中限定一个小开口的分隔件的长度的四分之一,由此在喷丝头中用分隔件切割所述许多边界线。
    • 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。