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    FILTER ASSEMBLY, PREFILTER ASSEMBLY, AND RESPIRATOR INCLUDING THE SAME
    6.
    发明申请
    FILTER ASSEMBLY, PREFILTER ASSEMBLY, AND RESPIRATOR INCLUDING THE SAME 审中-公开

    公开(公告)号：WO2020261034A1

    公开(公告)日：2020-12-30

    申请号：PCT/IB2020/055548

    申请日：2020-06-12

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： SCHULTZ, Nathan E. ,  DUAN, Daniel C. ,  KIRK, Seth M. ,  BERRIGAN, Michael R. ,  BECKER, Zackary J. ,  LI, Fuming B. ,  SEBASTIAN, John M.

    IPC: B01D39/16

    Abstract: A filter assembly comprises an air filter medium and a prefilter medium. The prefilter medium comprises a second nonwoven fibrous web comprising poly(4-methylpentene) and an electrostatic charging additive and has a second electret charge. The filter assembly is configured such that air passing through the prefilter is directed through the air filter medium. A respirator includes the filter assembly. A prefilter assembly comprises a third nonwoven fibrous web retained by a prefilter frame. The third nonwoven fibrous web comprises: core-sheath fiber comprising a fiber core having a poly(4-methylpentene) sheath layer disposed thereon; and an electrostatic charging additive, wherein the electrostatic charging additive is contained in at least one of the fiber core or the sheath layer. The third nonwoven fibrous web has a third electret charge.

    PLEATED FILTER ELEMENT COMPRISING PLEATED FILTER MEDIA WITH EDGE DAMS, AND METHOD OF MAKING AND USING
    8.
    发明申请
    PLEATED FILTER ELEMENT COMPRISING PLEATED FILTER MEDIA WITH EDGE DAMS, AND METHOD OF MAKING AND USING 审中-公开
    包括具有边缘坝的滤池滤池的滤池组件及其制造和使用方法

    公开(公告)号：WO2018038976A1

    公开(公告)日：2018-03-01

    申请号：PCT/US2017/046965

    申请日：2017-08-15

    Applicant: 3M INNOVATIVE PROPERTIES COMPANY

    Inventor： SEBASTIAN, John M. ,  HURLEY, Christopher A. ,  KREPEL, Kenneth J. ,  LEGARE, Pierre ,  LI, Fuming B. ,  MARTINSON, Paul A. ,  YEOM, Bong Y.

    IPC: B01D46/52 ,  B01D29/00 ,  B01D27/06 ,  B01D27/14 ,  A62B7/10 ,  A62B23/02

    Abstract: A pleated filter element comprising a pleated filter media comprising a plurality of oppositely-facing pleats with a pleat direction and with a plurality of upstream and downstream pleat tips and pleat valleys, wherein the pleated filter media comprises two corrugated edges and two noncorrugated edges. The first (second) corrugated edge of the pleated filter media comprises an edge dam of hardened adhesive that occupies the upstream and downstream pleat valleys at a location laterally inwardly proximate the first (second) corrugated edge and that extends along an entire longitudinal extent of the pleated filter media. The pleated filter media is a multilayer media comprising an organic polymeric nonwoven web, that exhibits a Percent Penetration of less than 5, laminated with a fiberglass prefilter layer that is disposed upstream of the primary filtration layer and that exhibits a Percent Penetration of greater than about 70.

    Abstract translation: 一种打褶的过滤元件，其包括打褶的过滤介质，所述打褶的过滤介质包括具有褶皱方向的多个相对褶皱以及多个上游和下游褶皱顶端和褶皱谷，其中所述褶皱过滤介质包括两个 波纹状边缘和两个非波状边缘。 褶皱式过滤介质的第一（第二）波纹边缘包括硬化粘合剂的边缘坝，其在侧向向内靠近第一（第二）波纹边缘的位置处占据上游褶皱谷和下游褶皱谷并且沿着第一（第二）波纹边的整个纵向范围 打褶的过滤介质。 褶皱过滤介质是包含有机聚合物非织造纤维网的多层介质，所述有机聚合物非织造纤维网表现出百分比渗透率小于5，与玻璃纤维预过滤器层层压，所述玻璃纤维预过滤器层布置在主过滤层的上游并且展现大于约 70。

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