Title:
GAS-PERMEABLE WATERPROOF SHEET
Document Type and Number:
WIPO Patent Application WO/2022/131377
Kind Code:
A1
Abstract:
This gas-permeable waterproof sheet is configured from an assembly of fine fibers which comprise a lipophilic material, have a fiber diameter in a prescribed range and are irregularly interwoven with one another. The center fiber diameter is preferably 1,000-3,000nm. The coefficient of variation in the fiber diameter quantity distribution is preferably 0.5-0.65. The bulk density of the assembly is preferably 0.01-0.10 g/cm3. At least part of the fiber assembly may be covered by a cover sheet through which a gas can pass. The cover sheet is preferably a nonwoven fabric or a mesh. As a result, the present invention provides an easily producible gas-permeable waterproof sheet which has a simple structure (in other words, a sheet-like member through which a gas such as air or water vapor passes, but through which water does not pass).
Inventors:
WU WEI (JP)
KIDO NAOTO (JP)
SOTA HIROYOSHI (JP)
KIDO NAOTO (JP)
SOTA HIROYOSHI (JP)
Application Number:
PCT/JP2021/046842
Publication Date:
June 23, 2022
Filing Date:
December 17, 2021
Export Citation:
Assignee:
M TECHX INC (JP)
International Classes:
D04H3/03; A01G9/14; A01G13/02; B32B5/26; B32B27/12; D04H1/4382
Foreign References:
| JPH05193037A | 1993-08-03 | |||
| JPS62184166A | 1987-08-12 | |||
| JP2013159882A | 2013-08-19 | |||
| JP2013133579A | 2013-07-08 | |||
| CN111065772A | 2020-04-24 | |||
| JP2001138425A | 2001-05-22 |
Attorney, Agent or Firm:
PROSPEC PATENT FIRM (JP)
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