Title:
NONWOVEN FABRIC, METHOD FOR PRODUCING NONWOVEN FABRIC, AND FILTER
Document Type and Number:
WIPO Patent Application WO/2021/054192
Kind Code:
A1
Abstract:
The present invention provides a nonwoven fabric having excellent filtration accuracy and filtration life when used as a filter, a method for producing the nonwoven fabric, and a filter. A nonwoven fabric (10) is formed of fibers (11) in the range of 0.10 μm to 5.00 μm. The nonwoven fabric (10) includes a coarse layer section (12) and a dense layer section (14). The coarse layer section (12) has a porosity Pc of at least 90% and an average pore diameter Dc in the range of 0.5 μm to 50 μm. The dense layer section (14) has a porosity Pd of at least 70% and a relative standard deviation of the pore diameter distribution of 20% or less.
Inventors:
NAKAGAWA YOSUKE (JP)
SHIMODA YASUHISA (JP)
KANEMURA KAZUHIDE (JP)
SHIMODA YASUHISA (JP)
KANEMURA KAZUHIDE (JP)
Application Number:
PCT/JP2020/033917
Publication Date:
March 25, 2021
Filing Date:
September 08, 2020
Export Citation:
Assignee:
FUJIFILM CORP (JP)
International Classes:
D04H1/425; B01D39/16; B32B5/26; D01D5/04; D04H1/728; D06M11/38
Foreign References:
| US20080160856A1 | 2008-07-03 | |||
| US20170360971A1 | 2017-12-21 | |||
| JP2018131692A | 2018-08-23 | |||
| JP2012077388A | 2012-04-19 | |||
| JP2003105543A | 2003-04-09 | |||
| JP2016030866A | 2016-03-07 | |||
| US20160303498A1 | 2016-10-20 | |||
| JP2014012904A | 2014-01-23 | |||
| US20190022634A1 | 2019-01-24 | |||
| JP2013236986A | 2013-11-28 | |||
| JPH01249063A | 1989-10-04 | |||
| JPH01249063A | 1989-10-04 |
Other References:
See also references of EP 4033022A4
Attorney, Agent or Firm:
KYORITSU INSTITUTE (JP)
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