Title:
METHOD OF CHARGING ELECTRET FILTER MEDIA
Document Type and Number:
Japanese Patent JP3735687
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide an electret-improved filter medium manufactured from a fiber, for example, a meltblown superfine fiber.
SOLUTION: This electret filter medium contains a nonwoven web of thermoplastic, nonconductive microfibers having trapped charge. This method of charging the electret filter media comprises a step (1) to make a jet water or a water droplet stream impinged against the web under a pressure sufficient to provide the web with filtration-enhancing electret charge to the web and a step (2) to dry the charged web.
Inventors:
Cade A Angadji Band
Marvin E. Jones
Daniel E. Mayer
Marvin E. Jones
Daniel E. Mayer
Application Number:
JP2003191177A
Publication Date:
January 18, 2006
Filing Date:
July 03, 2003
Export Citation:
Assignee:
3M COMPANY
International Classes:
B01D39/14; A62B7/00; A62B7/10; A62B18/00; A62B18/02; B01D39/00; B01D39/08; B01D39/16; B03C3/28; D04H1/40; D04H1/42; D04H1/46; D04H1/56; D04H11/00; D04H13/00; D06M10/00; D06M10/02; D06M11/05; H01G7/02; A62B23/02; (IPC1-7): B01D39/14; B01D39/00; B03C3/28; D04H1/46
Domestic Patent References:
| JP2104765A | ||||
| JP1224020A | ||||
| JP62290477A | ||||
| JP60168511A | ||||
| JP55138223A |
Attorney, Agent or Firm:
Aoyama Aoi
Muneo Yamamoto
Muneo Yamamoto
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