Title:
MULTILAYER FILTER MATERIAL
Document Type and Number:
WIPO Patent Application WO/2019/189638
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing a multilayer filter material in which degradation of deodorizing performance after an extended period of storage of filter material is suppressed, which has excellent deodorizing performance, and has low pressure loss. This multilayer filter material comprises three or more layers of overlapping non-woven fabric layers, and has two or more inter-layer regions configured from two of the non-woven fabric layers that are adjacent to each other. In a first inter-layer region among the inter-layer regions, function particles A having an average particle diameter of from 50 to 100 μm are present. In a second inter-layer region selected from the other inter-layer regions, function particles B having an average particle diameter of from 150 to 500 μm are present.
Inventors:
YATSUNAMI YUJI (JP)
ASADA YASUHIRO (JP)
TAKAKI YUFUKO (JP)
ASADA YASUHIRO (JP)
TAKAKI YUFUKO (JP)
Application Number:
PCT/JP2019/013746
Publication Date:
October 03, 2019
Filing Date:
March 28, 2019
Export Citation:
Assignee:
TORAY INDUSTRIES (JP)
International Classes:
B01D39/16; A61L9/014; B03C3/28
Domestic Patent References:
| WO2009041257A1 | 2009-04-02 |
Foreign References:
| JP2002177717A | 2002-06-25 | |||
| JP2002331212A | 2002-11-19 | |||
| JPS49134783U | 1974-11-20 | |||
| JPH11300126A | 1999-11-02 | |||
| JP2003334410A | 2003-11-25 | |||
| JP2000233111A | 2000-08-29 | |||
| JP2015139720A | 2015-08-03 | |||
| JP2007136029A | 2007-06-07 |
Other References:
See also references of EP 3777992A4
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