Method for making shaped filtration articles
    64.
    发明授权
    Method for making shaped filtration articles 有权
    成型过滤制品的制造方法

    公开(公告)号:US08029723B2

    公开(公告)日:2011-10-04

    申请号:US12375494

    申请日:2007-07-17

    摘要: Shaped filtration articles are made from a monocomponent nonwoven web formed by flowing first and second fiber-forming materials of the same polymeric composition through first and second die cavities in respective fluid communication with first and second sets of orifices in a meltblowing die tip. The first fiber-forming material flows at a lesser flow rate or viscosity through the first die cavity and first set of orifices to form a set of smaller size filaments and the second fiber-forming material flows at a greater flow rate or viscosity through the second die cavity and second set of orifices to form a set of larger size filaments. The collected nonwoven web contains a meltblown bimodal mass fraction/fiber size mixture of intermingled continuous microfibers and larger size fibers of the same polymeric composition.

    摘要翻译: 形成的过滤制品由单组分非织造织物制成,所述单组分非织造纤维网通过在熔吹模头中与第一和第二组孔流体连通地通过第一和第二模具腔流动相同聚合物组合物的第一和第二纤维形成材料而形成。 第一纤维形成材料以较小的流速或粘度通过第一模腔和第一组孔流动以形成一组较小尺寸的细丝,并且第二纤维形成材料以更大的流速或粘度流过第二纤维形成材料 模腔和第二组孔以形成一组较大尺寸的细丝。 收集的非织造纤维网含有相同聚合物组合物的混合连续微纤维和较大尺寸纤维的熔喷双峰质量分数/纤维尺寸混合物。