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    Fibers and Nonwovens Including a Propylene Random Copolymer, and Processes for Producing the Fibers and Nonwovens
    5.
    发明申请
    Fibers and Nonwovens Including a Propylene Random Copolymer, and Processes for Producing the Fibers and Nonwovens 审中-公开
    包括丙烯无规共聚物的纤维和无纺布，以及生产纤维和无纺布的方法

    公开(公告)号：US20150031262A1

    公开(公告)日：2015-01-29

    申请号：US14241277

    申请日：2012-08-28

    申请人： Gaëtan Henry ,  Guillaume Pavy ,  John Bieser ,  Hugues Haubruge ,  Alain Standaert

    发明人： Gaëtan Henry ,  Guillaume Pavy ,  John Bieser ,  Hugues Haubruge ,  Alain Standaert

    IPC分类号： D01F6/30 ,  D04H1/4291 ,  D01D5/098 ,  D04H3/007 ,  D01F6/06 ,  D01D5/08

    CPC分类号： D01F6/30 ,  D01D5/08 ,  D01D5/0985 ,  D01F6/06 ,  D04H1/4291 ,  D04H3/007 ,  D10B2321/022 ,  Y10T442/60 ,  Y10T442/681 ,  Y10T442/682 ,  C08F10/00 ,  C08F4/65927

    摘要： Fibers can include a polypropylene composition, which can include a metallocene random copolymer of propylene and a comonomer that is an alpha-olefin different from propylene. The metallocene random copolymer can have a comonomer content of from 1.2 wt % to 1.8 wt %, a molecular weight distribution of at least 1.0 and of at most 4.0 obtained without thermal or chemical degradation, and a melting temperature Tmelt of at most 140° C. A nonwoven can include the fibers, and a laminate can include the nonwoven. The fibers can be produced by polymerizing the propylene and comonomer in presence of a metallocene-based polymerization catalyst to obtain the metallocene random copolymer. The polypropylene composition can be melt-extruded to obtain a molten polypropylene stream, which can be extruded from capillaries of a spinneret to obtain filaments. A diameter of the filaments can be rapidly reduced to obtain a final diameter.

    摘要翻译： 纤维可以包括聚丙烯组合物，其可以包括丙烯和作为不同于丙烯的α-烯烃的共聚单体的茂金属无规共聚物。 茂金属无规共聚物可以具有1.2重量％至1.8重量％的共聚单体含量，至少1.0的分子量分布和至多4.0，而没有热或化学降解，并且熔融温度Tmelt至多为140℃ 无纺布可以包括纤维，并且层压体可以包括非织造材料。 纤维可以通过在金属茂系聚合催化剂的存在下使丙烯和共聚单体聚合得到茂金属无规共聚物来制备。 可以将聚丙烯组合物熔融挤出以获得熔融的聚丙烯流，其可从喷丝头的毛细管挤出以获得长丝。 长丝的直径可以迅速降低以获得最终的直径。