POLYMER COMPOSITIONS AND NONWOVEN COMPOSITIONS PREPARED THEREFROM
    4.
    发明公开
    POLYMER COMPOSITIONS AND NONWOVEN COMPOSITIONS PREPARED THEREFROM 审中-公开
    POLYMERZUSAMMENSETZUNGEN UND DARAUS HERGESTELLTE VLIESZUSAMMENSETZUNGEN

    公开(公告)号:EP2785788A1

    公开(公告)日:2014-10-08

    申请号:EP12787272.9

    申请日:2012-10-30

    摘要: Propylene-based polymer compositions are provided comprising propylene and from about 5 wt % to about 20 wt % of one or more C2 and/or C4-C12 α-olefins. The polymer compositions have a triad tacticity greater than about 90%, a heat of fusion less than about 75 J/g, and a melt flow rate (MFR) greater than or equal to about 25 g/10 min (230° C., 2.16 kg). Further, the polymer compositions are reactor grade compositions comprising a reactor blend of a first polymer and a second polymer, preferably where both of the first and second polymers are prepared using the same catalyst system. Meltspun nonwoven fabrics, such as meltblown or spunbond fabrics, comprising such polymer compositions are also provided, as well as processes for forming the nonwoven fabrics.

    摘要翻译: 提供了丙烯类聚合物组合物,其包括丙烯和约5重量%至约20重量%的一种或多种C 2和/或C 4 -C 12α-烯烃。 聚合物组合物的三单元组立构规整度大于约90%,熔融热小于约75J / g,熔体流动速率(MFR)大于或等于约25g / 10min(230℃, 2.16公斤)。 此外,聚合物组合物是包含第一聚合物和第二聚合物的反应器共混物的反应器级组合物,优选地,其中使用相同的催化剂体系制备第一和第二聚合物。 还提供了包含这种聚合物组合物的熔喷非织造织物,例如熔喷或纺粘织物,以及用于形成无纺织物的方法。