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    APPARATUS AND METHODS FOR PRODUCING NONWOVEN FIBROUS WEBS
    2.
    发明公开
    APPARATUS AND METHODS FOR PRODUCING NONWOVEN FIBROUS WEBS 有权
    设备和方法的纤维非织造布生产

    公开(公告)号：EP2798108A1

    公开(公告)日：2014-11-05

    申请号：EP12863713.9

    申请日：2012-12-21

    申请人： 3M Innovative Properties Company

    发明人： HENDERSON, John W. ,  WU, Tien T. ,  CASTRO, Gustavo H. ,  HOFFDAHL, Gerry A. ,  VALL, David L.

    IPC分类号： D04H1/732 ,  D04H1/736 ,  D04H1/44

    CPC分类号： D04H1/736 ,  D04H1/44 ,  D04H1/49 ,  D04H1/732

    摘要： Methods and apparatus including a fiber opening chamber having an open upper end and a lower end, at least one fiber inlet for introducing a multiplicity of fibers into the opening chamber, a first multiplicity of rollers positioned within the opening chamber wherein each roller has a multiplicity of projections extending outwardly from a circumferential surface surrounding a center axis of rotation, at least one gas emission nozzle positioned substantially below the first multiplicity of rollers to direct a gas stream generally towards the open upper end of the opening chamber, and a forming chamber having an upper end and a lower end, wherein the upper end of the forming chamber is in flow communication with the open upper end of the opening chamber, and the lower end of the forming chamber is substantially open and positioned above a collector having a collector surface.

    STRUCTURED SURFACE ELECTROSTATIC FILTRATION MEDIA ARRAY
    8.
    发明公开
    STRUCTURED SURFACE ELECTROSTATIC FILTRATION MEDIA ARRAY 有权
    具有结构化表面静载荷作用的过滤介质

    公开(公告)号：EP1414578A1

    公开(公告)日：2004-05-06

    申请号：EP02739271.1

    申请日：2002-05-13

    申请人： 3M Innovative Properties Company

    发明人： ZHANG, Zhiqun ,  WU, Tien T. ,  TANG, Yuan-Ming ,  SPIEWAK, Brian E.

    IPC分类号： B03C3/28 ,  B03C3/155

    CPC分类号： B03C3/155 ,  B03C3/28 ,  Y10S55/39

    摘要： An electrostaticly charged filtration media is provided comprising a plurality of polymeric structured polymeric film layers having a structured surface defined on at least one face of each structured film layer forming at least in part flow channels, the plurality of structured film layers configured as a stack with the structured surfaces defining a plurality of ordered inlets open through a face of the stack that are in fluid communication with ordered fluid pathways each fluid pathway defined at least in part by at least one discrete flow channel such that fluid can flow substantially unimpeded from one of the inlets to an outlet opening at through another face of the stack wherein layer of fluid pathways is defined by two opposing charged film layers at least one of which is a structured film layer that has flow channels with an average height of from 0.1 mm to 5 mm and an average width of from 0.05 mm to 50 mm and an average aspect ratio of from 0.5 to 10.