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    • 4. 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。
    • 5. 发明授权
    • Process for producing a fibrous assembly
    • 纤维集合体的制造方法
    • US4399084A
    • 1983-08-16
    • US293269
    • 1981-08-17
    • Yasuhiko SagawaSusumu NorotaTsutomu KiriyamaShingo EmiTadasi ImotoTetsuo Yamauchi
    • Yasuhiko SagawaSusumu NorotaTsutomu KiriyamaShingo EmiTadasi ImotoTetsuo Yamauchi
    • D01D4/02D01D5/088D01D5/20D01F6/60H05B1/00
    • D01D5/20D01D4/02D01D5/088D01F6/605
    • The present invention provides a process for producing a fibrous assembly, which comprises extruding a melt of a fiber-forming polymer through a mesh spinneret, said spinneret including many closely arranged small openings and having an opening ratio (.alpha.), represented by the following formula, of at least about 10% ##EQU1## V.sub.a is the total apparent volume of the spinneret which is taken within a unit area of its mesh portion, and V.sub.f is the total volume of partitioning members defining the small openings which is taken within a unit area of the mesh portion of the spinneret; said extrusion being carried out while generating Joule heat in the partitioning members of the spinneret and cooling the vicinity of the extrusion surface of the spinneret by supplying a cooling fluid, whereby the melt is stably converted into fine streams by the partitioning members; and taking up and solidifying the fine streams; and also provides the process wherein the extrusion surface of the spinneret is turned upward so that the normal vector of the extruding surface is reverse to the direction of gravity, and the fine streams extruded from the extrusion surface are taken up against gravity.The present invention provides a molding apparatus for production of a fibrous assembly having a mesh spinneret which has many closely arranged small openings having an opening ratio .alpha. defined by the above formula of at least 10% and the extrusion surface of the spinneret being turned upwardly such that the normal vector of the extrusion surface is reverse to the direction of gravity.
    • 本发明提供一种纤维集合体的制造方法,该方法包括通过网眼喷丝头挤出成纤聚合物的熔体,所述喷丝头包括许多紧密排列的小孔,并具有开口率(α),由下式 ,至少约10%,是在其网眼部分的单位面积内拍摄的喷丝头的总表观体积,Vf是限定在单位内的小开口的分隔构件的总体积 喷丝板网部分的面积; 所述挤出是在喷丝板的分隔件中产生焦耳热并且通过供应冷却流体冷却喷丝板的挤压表面附近而进行的,从而通过分隔件稳定地将熔体转化成细流; 捡起和凝固细流; 并且还提供了其中喷丝板的挤出表面向上转动使得挤出表面的法向矢量与重力方向相反的过程,并且从挤压表面挤出的细流被克服重力。 本发明提供了一种用于生产具有网眼喷丝头的纤维组件的模制设备,其具有许多紧密排列的小开口,其具有由上述公式定义的至少10%的开口比α,并且喷丝头的挤出表面向上转动, 挤压表面的法向量与重力方向相反。