DEPTH FILTER

WIPO Patent Application WO/2020/196515

A1

The present invention addresses the problem of providing a filter that exhibits good precision of filtration even of fluids containing a high concentration of fine powder particles having high viscosity, and that has excellent pressure resistance for enabling filtration over a long period of time. This depth filter comprises a substrate layer, a filtration layer, and a skin layer in this order. The substrate layer and the skin layer are layers obtained by winding and thermally fusing a nonwoven cloth configured from fibers having an average fiber diameter of 150 μm or more. The filtration layer is a layer obtained by winding two or more layers of layered bodies containing at least a net and a nonwoven cloth included only in the filtration layer. The average fiber diameter of the nonwoven cloth constituting the substrate layer and the average fiber diameter of the nonwoven cloth constituting the skin layer are larger than the average fiber diameter of the nonwoven cloth included only in the filtration layer.

MINEO RYOTA (JP)
NISHIHARA HISATO (JP)
YAMAGUCHI OSAMU (JP)
KANARI KAZUKI (JP)

PCT/JP2020/013004

October 01, 2020

March 24, 2020

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JNC CORP (JP)
JNC FILTER CO LTD (JP)

B01D39/16; B32B5/26; B32B27/02; B32B27/32; D04H1/4282; D04H3/007; D04H3/073; D04H3/16

WO2018021426A1

2018-02-01

JP2018126721A	2018-08-16
JP2015097979A	2015-05-28
JP2000279727A	2000-10-10
JP2010137121A	2010-06-24
JP2000218113A	2000-08-08
JP2015097979A	2015-05-28

MINORI PATENT PROFESSION CORPORATION (JP)

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