Title:
不織布、及びフィルタ
Document Type and Number:
Japanese Patent JP7280369
Kind Code:
B2
Abstract:
Provided are a nonwoven fabric having excellent filtration accuracy and filtration service life in a case where it is used as a filter, a nonwoven fabric manufacturing method, and a filter.A nonwoven fabric (10) is formed of fibers (11) of 0.10 µm or more and 5.00 µm or less. The nonwoven fabric (10) includes a coarse layer portion (12) and a dense layer portion (14). In the coarse layer portion (12), a void volume Pc is at least 90% and an average pore diameter Dc is in a range of 0.5 µm or more and 50 µm or less. In the dense layer portion (14), a void volume Pd is at least 70% and a relative standard deviation of pore diameter distribution is 20% or less.
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Inventors:
Yousuke Nakagawa
Yasuhisa Shimoda
Kazuhide Kanemura
Yasuhisa Shimoda
Kazuhide Kanemura
Application Number:
JP2021546624A
Publication Date:
May 23, 2023
Filing Date:
September 08, 2020
Export Citation:
Assignee:
Fujifilm Corporation
International Classes:
D04H1/425; B01D39/16; B32B5/26; D04H1/4258; D04H1/4374; D04H1/728
Domestic Patent References:
| JP2018131692A | ||||
| JP2012077388A |
Foreign References:
| US20080160856 | ||||
| US20170360971 |
Attorney, Agent or Firm:
Kobayashi International Patent Office