公开(公告)号：WO2022064332A1

公开(公告)日：2022-03-31

申请号：PCT/IB2021/058470

申请日：2021-09-16

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： SANTA CRUZ, Windy A. ,  MCCOOL, Christine L. ,  STOUGHTON, Hannah L. ,  STENDER, John B.

IPC: B01D46/00 ,  B01D39/14

Abstract: A method of filtering particles is disclosed. The method includes providing a first filter layer. The first filter layer includes a polyolefin polymer and an electret material and the method further includes providing a second filter layer. The second filter layer includes a fire-resistant material. The method includes providing a duct having an entrance face and an exit face, and the duct is configured to accommodate a fluid flow from the entrance face to the exit face. Further, the method includes disposing the first filter layer and the second filter layer such that the first filter layer is nearer to the exit face than is the second filter layer.

公开(公告)号：WO2020194137A1

公开(公告)日：2020-10-01

申请号：PCT/IB2020/052488

申请日：2020-03-18

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： STOUGHTON, Hannah L. ,  SANTA CRUZ, Windy A. ,  GORRELL, Matthew W. ,  STENDER, John B. ,  KELLEY, Tommie W. ,  MCCOOL, Christine L. ,  SANOCKI, Stephen M. ,  GAO, Yaohua ,  DUNBAR, Joseph A. ,  BRANDNER, John M.

IPC: B01D39/16

Abstract: Filter assemblies are described. In particular, filter assemblies that include a filter frame, a fire resistant filter media, and a metallic layer disposed on and covering a major surface of the filter frame are described. The filter frame is rigid and includes at least one of a polymeric material, wood, or a wood pulp material. Filter assemblies described include flammable or meltable materials yet may retain structural integrity after being exposed to flame.

公开(公告)号：WO2020049522A1

公开(公告)日：2020-03-12

申请号：PCT/IB2019/057538

申请日：2019-09-06

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： GORRELL, Matthew W. ,  STOUGHTON, Hannah L. ,  SANTA CRUZ, Windy A. ,  MCCOOL, Christine L. ,  KELLEY, Tommie W. ,  STENDER, John B. ,  GRIFFITH, Blake R. ,  BRANDNER, John M. ,  GAO, Yaohua ,  SANOCKI, Stephen M. ,  DUNBAR, Joseph A.

IPC: B01D39/16 ,  B01D46/00 ,  F24C15/20

Abstract: Various embodiments disclosed relate to a fire-resistant filter and methods of making and using the same. A filter includes a fibrous web or sheet comprising fire-resistant fibers, the fire-resistant fibers comprising oxidized polyacrylonitrile (OPAN), flame-retardant (FR) rayon, or a combination thereof.

公开(公告)号：WO2020049507A1

公开(公告)日：2020-03-12

申请号：PCT/IB2019/057505

申请日：2019-09-05

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： STOUGHTON, Hannah L. ,  KELLEY, Tommie W. ,  SANTA CRUZ, Windy A. ,  GORRELL, Matthew W. ,  STENDER, John B. ,  MCCOOL, Christine L. ,  ELAM, Michael J. ,  SCHUFFERT, Michael S. ,  HEDDEN, Jackson H. ,  TYNESKI, Frank ,  VERNON, John M.

IPC: B01D46/00 ,  B01D39/14

Abstract: Filter assemblies are disclosed. In particular, filter assemblies including a filter media and an overlay portion covering the filter media are disclosed. Such filter assemblies may provide both acceptable filtering capacity and cleanable visible front surfaces.