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    • 5. 发明公开
    • NONWOVEN FABRIC MADE OF CORE/SHEATH TYPE COMPOSITE FIBER AND PROCESS FOR PRODUCING THE SAME
    • VUEFAHREN ZU DESSEN HERSTELLUNG的VLIESSTOFF AUS KERNMANTELFASER
    • EP1553223A1
    • 2005-07-13
    • EP03769909.7
    • 2003-10-17
    • UNITIKA LTD.
    • KIHARA, Yukihiro
    • D04H3/00D01F8/06
    • D04H3/16D01F8/06D01F8/14D04H3/14Y10T442/61
    • A nonwoven fabric is comprised of sheath-core type bicomponent continuous fibers. The core portion is consisted of a polyester and the sheath portion is consisted of a polyethylene. The polyethylene may be a mixture of the first polyethylene polymerized by metallocene catalyst and the second polyethylene polymerized by Ziegler-Natta catalyst. The configuration of the cross section of the core portion do not change along the axial direction. The core portion has the substantially same diameter. On the other, the thickness of the sheath portion is changed irregularly and at random along the axial direction and circular direction of the fiber. That is, the surface of the sheath portion is irregular unevenness. Therefore, the nonwoven fabric containning the bicomponent fibers is very soft. The nonwoven fabric may be obtained by accumulating the fibers which are melt spun out sheath-core type spinning holes. The polyester is provided to each core hole, and the polyethylene is provided to each sheath hole of the spinning holes.
    • 无纺布由皮芯型双组分连续纤维构成。 芯部由聚酯构成,鞘部由聚乙烯构成。 聚乙烯可以是由茂金属催化剂聚合的第一聚乙烯和由齐格勒 - 纳塔催化剂聚合的第二聚乙烯的混合物。 芯部的截面形状不会沿轴向变化。 芯部具有基本相同的直径。 另一方面,护套部的厚度沿着纤维的轴方向和圆周方向不规则地变化。 也就是说,鞘部的表面是不规则的凹凸。 因此,含有双组分纤维的无纺布非常柔软。 无纺布可以通过将熔融纺丝的皮芯型纺丝孔的纤维聚集而获得。 聚酯被提供到每个芯孔,并且聚乙烯被提供到纺丝孔的每个护套孔。