Title:
ELECTRET SHEET AND FILTER
Document Type and Number:
WIPO Patent Application WO/2023/163218
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing: an electret sheet which has at least one functional property selected from an anti-bacterial property, an anti-viral property and an anti-fungal property and has excellent electrostatic charge retention properties; and a filter. Provided is an electret sheet provided with an electrically charged layer and a functional layer, in which the electrically charged layer has a porous structure, the functional layer contains a thermoplastic resin (B) and a functioning agent having at least one function selected from the group consisting of an anti-bacterial function, an anti-viral function and an anti-fungal function in a total amount of 1 to 40% by mass relative to the whole mass of the functional layer, and the water vapor permeability coefficient of the electret sheet is 0.01 to 5.0 g·mm/m2·24 hr. Also provided is a filter which is equipped with a flow path formed using the electret sheet, in which the flow path cross section ratio of the flow path is 10 to 99% and the space charge density in the filter is 10 to 5000 nC/cm3.
Inventors:
SATO WATARU (JP)
SUGAMATA YUTARO (JP)
HIROI YOUSUKE (JP)
SUGAMATA YUTARO (JP)
HIROI YOUSUKE (JP)
Application Number:
PCT/JP2023/007350
Publication Date:
August 31, 2023
Filing Date:
February 28, 2023
Export Citation:
Assignee:
YUPO CORP (JP)
International Classes:
H01G7/02; B01D39/16; B03C3/28; B32B7/025
Domestic Patent References:
| WO2019189349A1 | 2019-10-03 | |||
| WO2018164207A1 | 2018-09-13 |
Foreign References:
| JP2011038195A | 2011-02-24 | |||
| JPH03186309A | 1991-08-14 |
Attorney, Agent or Firm:
TAKAOKA Ryoichi et al. (JP)
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