Title:
FILTER PLEAT PACK, AND AIR FILTER UNIT
Document Type and Number:
WIPO Patent Application WO/2022/092161
Kind Code:
A1
Abstract:
The provided filter pleat pack includes an air filter filtration material provided with a first fluororesin porous membrane and a first air-permeable support layer. The first air-permeable support layer is positioned on the downstream side, in terms of an airflow passing through the filtration material, relative to the fluororesin porous membrane. The first air-permeable support layer has, on at least one width-direction end section, an air passage inhibition part that extends along the end section and that inhibits passage of air in the width direction of the first air-permeable support layer. The air passage inhibition part is in contact with the first fluororesin porous membrane. This filter pleat pack is suitable for suppressing any decrease in the capturing efficiency of an air filter unit when a gap between a frame body and a side surface of a pleat pack is sealed, even if a simplified seal that covers the gap from only the downstream side is applied.
Inventors:
MASAKI SHUNSUKE (JP)
IKEMURA YUSUKE (JP)
MORI MASAAKI (JP)
IKEMURA YUSUKE (JP)
MORI MASAAKI (JP)
Application Number:
PCT/JP2021/039689
Publication Date:
May 05, 2022
Filing Date:
October 27, 2021
Export Citation:
Assignee:
NITTO DENKO CORP (JP)
International Classes:
B01D63/14; B01D39/16; B01D46/52; B01D63/00; B01D71/36
Domestic Patent References:
| WO2013014828A1 | 2013-01-31 | |||
| WO2017150027A1 | 2017-09-08 |
Foreign References:
| JPH08266843A | 1996-10-15 | |||
| JPH0889737A | 1996-04-09 | |||
| JP2020093197A | 2020-06-18 | |||
| JPH10156121A | 1998-06-16 | |||
| JP2019531880A | 2019-11-07 | |||
| JP2002058943A | 2002-02-26 | |||
| JP2014198313A | 2014-10-23 |
Other References:
See also references of EP 4238635A1
Attorney, Agent or Firm:
KAMADA Koichi (JP)
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