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    Porous membranes, freestanding composites, and related devices and methods
    3.
    发明授权
    Porous membranes, freestanding composites, and related devices and methods 有权

    公开(公告)号：US11380961B2

    公开(公告)日：2022-07-05

    申请号：US16622241

    申请日：2018-06-15

    申请人： AMTEK RESEARCH INTERNATIONAL LLC

    发明人： Daniel Wandera

    IPC分类号： H01M50/411 ,  H01M50/403 ,  H01M50/463 ,  H01M50/449

    摘要： The disclosed porous membranes and freestanding composites containing the porous membranes have a solution-cast three-dimensional polymer matrix defining interconnecting pores that provide overall first major surface-to-second major surface fluid permeability. The porous membranes and freestanding composites can be used to separate lead-acid battery electrodes. The porous membranes and freestanding composites can have high porosity and low electrical resistance while having both excellent flexibility and mechanical strength. This can reduce the probability of damage to the separators during battery assembly and also allow production of battery separators with a high overall height, but a minimal backweb thickness.

    HIGH POROSITY SILICA-CONTAINING MICROPOROUS SHEETS
    8.
    发明申请
    HIGH POROSITY SILICA-CONTAINING MICROPOROUS SHEETS 有权
    高含量二氧化硅微孔板

    公开(公告)号：US20150207121A1

    公开(公告)日：2015-07-23

    申请号：US14604539

    申请日：2015-01-23

    申请人： Amtek Research International LLC

    发明人： Jeff Frenzel ,  Jungseung Kim ,  Robert R. Waterhouse ,  Richard W. Pekala

    IPC分类号： H01M2/16

    CPC分类号： H01M2/166 ,  H01M10/06

    摘要： A flexible microporous polymer sheet having first and second opposite major surfaces comprises a polymer matrix binding a filler component that exhibits high oil absorption capacity in its initial state before the start of material processing. The polymer matrix includes a polyolefin component and has three-dimensional interconnecting and interpenetrating pore and polymer networks through which the bound filler component is distributed from the first major surface to the second major surface. The polyolefin and filler components are included in amounts that result in a microporous polymer sheet having between about 75% and about 90% porosity and containing less than about 10 wt. % polyolefin component. Preferred polyolefin and filler components include ultrahigh molecular weight polyethylene and high oil absorption precipitated silica, respectively.

    摘要翻译： 具有第一和第二相对主表面的柔性微孔聚合物片材包括聚合物基体，其结合在开始材料加工之前其初始状态下具有高吸油量的填料组分。 聚合物基质包括聚烯烃组分并且具有三维互连和互穿孔和聚合物网络，通过该网络，结合的填料组分从第一主表面分配到第二主表面。 包含的聚烯烃和填料组分的量使得微孔聚合物片材的孔隙率为约75％至约90％且含有小于约10wt。 ％聚烯烃组分。 优选的聚烯烃和填料组分分别包括超高分子量聚乙烯和高吸油沉淀二氧化硅。