Title:
DEPTH FILTER
Document Type and Number:
WIPO Patent Application WO/2020/066767
Kind Code:
A1
Abstract:
The invention addresses the problem of providing a depth filter with excellent filtration accuracy and pressure resistance performance even for fluids containing high density and high viscosity fine powder particulates. Provided is a depth filter having a substrate layer, filtration layer, and surface layer, in that order, wherein: the substrate layer and the surface layer are layers made by being wrapped by a nonwoven fabric and thermally fused; the filtration layer is wrapped two or more times by a layered body in which at least a nonwoven fabric and a net are layered; and the nonwoven fabric contained in the filtration layer contains a mixed fiber nonwoven fabric containing two or more types of fibers with mutually different average fiber diameters.
Inventors:
MINEO RYOTA (JP)
NISHIHARA HISATO (JP)
YAMAGUCHI OSAMU (JP)
NISHIHARA HISATO (JP)
YAMAGUCHI OSAMU (JP)
Application Number:
PCT/JP2019/036472
Publication Date:
April 02, 2020
Filing Date:
September 18, 2019
Export Citation:
Assignee:
JNC CORP (JP)
JNC FILTER CO LTD (JP)
JNC FILTER CO LTD (JP)
International Classes:
B01D39/16; B01D39/08; D04H1/541; D04H1/544; D04H1/559
Domestic Patent References:
| WO2015046564A1 | 2015-04-02 |
Foreign References:
| JP2018126721A | 2018-08-16 | |||
| JP2015097979A | 2015-05-28 | |||
| JPH1190135A | 1999-04-06 | |||
| JP2019077962A | 2019-05-23 | |||
| JP2010137121A | 2010-06-24 | |||
| JP2000218113A | 2000-08-08 | |||
| JP2015097979A | 2015-05-28 |
Other References:
See also references of EP 3858457A4
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