Polypropylene fiber and a preparation process thereof
    2.
    发明授权
    Polypropylene fiber and a preparation process thereof 失效
    聚丙烯纤维及其制备方法

    公开(公告)号:US5478646A

    公开(公告)日:1995-12-26

    申请号:US15056

    申请日:1993-02-08

    IPC分类号: D01F6/06 D02G3/00

    摘要: A fiber excellent in strength and having an average size of 10,000-0.1 denier can be obtained by extruding a raw material composed mainly of a polypropylene having a syndiotactic pentad fraction of 0.7 or more and optionally stretching the resulting extruded material.By using as the raw material a composition consisting of two kinds of polypropylenes each having an intrinsic viscosity .eta..sub.1 or .eta..sub.2, the log(.eta..sub.2 /.eta..sub.1) being more than 0.05 or less than -0.05, and a syndiotactic pentad fraction of 0.7 or more at a weight ratio of 95:5-5:95 or a composition consisting of at least 50 parts by weight of a syndiotactic polypropylene having the intrinsic viscosity .eta..sub.1 and a syndiotactic pentad fraction of 0.7 or above and at most 50 parts by weight of an isotactic polypropylene having the intrinsic viscosity .eta..sub.2, the extrudability is improved and the fiber stretching conditions are broadened.

    摘要翻译: 通过将主要由间同立构五单元组分为0.7以上的聚丙烯组成的原料挤出并任选地拉伸所得的挤出材料,可以获得强度优异且平均粒径为10,000-0.1旦尼尔的纤维。 通过使用由两种各自具有特性粘度eta 1或eta 2的聚丙烯组成的组合物,log(eta 2 / eta 1)大于0.05或小于-0.05,并且间同立构五单元组分数 0.7重量%以上,重量比为95:5.5:95的组合物或由至少50重量份的特性粘度η1和间同立构五单元组分数为0.7以上至多50份的间同立构聚丙烯组成的组合物 的特性粘度等于2的全同立构聚丙烯,可挤出性提高,纤维拉伸条件变宽。

    Process of making polyprophylene fibers
    6.
    发明授权
    Process of making polyprophylene fibers 失效
    制造聚丙烯纤维的工艺

    公开(公告)号:US5624621A

    公开(公告)日:1997-04-29

    申请号:US518816

    申请日:1995-08-24

    IPC分类号: D01F6/06 D01D5/12

    摘要: A fiber excellent in strength and having an average size of 10,000-0.1 denier can be obtained by extruding a new material composed mainly of a polypropylene having a syndiotactic pentad fraction of 0.7 or more and optionally stretching the resulting extruded material. By using as the raw material a composition consisting of two kinds of polypropylenes each having an intrinsic viscosity .eta..sub.1 or .eta..sub.2, the log(.eta..sub.2 /.eta..sub.1) being more than 0.05 or less than -0.05, and a syndiotactic pentad traction of 0.7 or more at a weight ratio of 95:5-5:95 or a composition consisting of at least 50 parts by weight of a syndiotactic polypropylene having the intrinsic viscosity .eta..sub.1 and a syndiotactic pentad fraction of 0.7 or above and at most 50 parts by weight of an isotactic polypropylene having the intrinsic viscosity .eta..sub.2, the extrudability is improved and the fiber stretching conditions are broadened.

    摘要翻译: 通过挤出主要由间同立构五单元组分为0.7以上的聚丙烯组成的新材料,并任选地拉伸所得的挤出材料,可以获得强度优异且平均尺寸为10,000-0.1旦尼尔的纤维。 通过使用由具有特性粘度eta 1或eta 2的两种聚丙烯组成的组合物,log(eta 2 / eta 1)大于0.05或小于-0.05,间同立构五单元牵引力 0.7重量%以上,重量比为95:5.5:95的组合物或由至少50重量份的特性粘度η1和间同立构五单元组分数为0.7以上至多50份的间同立构聚丙烯组成的组合物 的特性粘度等于2的全同立构聚丙烯,可挤出性提高,纤维拉伸条件变宽。