Title:
AIR FILTER MATERIAL, AIR FILTER PACK, AND AIR FILTER UNIT
Document Type and Number:
WIPO Patent Application WO/2018/062112
Kind Code:
A1
Abstract:
This air filter material (10) includes a first PTFE porous film (1) and a second PTFE porous film (2). The air filter material (10) is provided with a first main surface (11) and a second main surface (12). The first PTFE porous film (1) and the second PTFE porous film (2) are disposed such that an airflow passing therethrough from the first main surface (11) to the second main surface (12), passes through the first PTFE porous film (1) and the second PTFE porous film (2) in that order. The ratio of the area of the surface of the first PTFE porous film (1) occupied by a plurality of nodes is within the range of 1.5-3.0%. The average value of the area of the plurality of nodes is 200 µm2 or higher.
Inventors:
NIKI TAKASHI (JP)
MORI MASAAKI (JP)
WADA SHIHO (JP)
DAIMON ATSUSHI (JP)
YANAGI TOSHIKI (JP)
MORI MASAAKI (JP)
WADA SHIHO (JP)
DAIMON ATSUSHI (JP)
YANAGI TOSHIKI (JP)
Application Number:
PCT/JP2017/034582
Publication Date:
April 05, 2018
Filing Date:
September 25, 2017
Export Citation:
Assignee:
NITTO DENKO CORP (JP)
International Classes:
B01D39/16; B01D46/52; B01D71/36
Domestic Patent References:
| WO2017056508A1 | 2017-04-06 |
Foreign References:
| JP2015186772A | 2015-10-29 | |||
| JP2000042322A | 2000-02-15 | |||
| JPH05202217A | 1993-08-10 | |||
| JP2014500139A | 2014-01-09 | |||
| JP2015226877A | 2015-12-17 | |||
| JPH10505378A | 1998-05-26 |
Other References:
See also references of EP 3520874A4
Attorney, Agent or Firm:
KAMADA Koichi et al. (JP)
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