Title:
CHARGED FILTER MEDIUM AND METHOD FOR MANUFACTURING CHARGED FILTER MEDIUM
Document Type and Number:
WIPO Patent Application WO/2018/174176
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a charged filter medium having superior filtration performance and a method for manufacturing a charged filter medium. The present invention is a charged filter medium having both superior pressure loss and collection efficiency in excellent balance such that the pressure loss is 24 Pa or less with an air flow of 10 cm/s and the collection efficiency for particles with a particle size of 0.3 – 0.5 µm at an air flow of 10 cm/s is 76% or greater, even being a charged filter medium provided with a fine fiber layer with a median fiber diameter for constituent fibers smaller than 2.5 µm and a mesh smaller than 13 g/m2 and a charged laminate wherein a support fiber layer is integrated by lamination. In addition, a method for manufacturing this charged filter medium has a step for preparing a laminate by integration of a fine fiber fabric and a support fabric by lamination, thereby being able to provide the same to a polarized fluid charging method in a state where the fine fiber fabric is reinforced by the support fabric. As a result, it is possible to manufacture a charged filter medium having both superior pressure loss and collection efficiency in excellent balance.
Inventors:
ISHIBASHI TATSURO (JP)
TANAKA HIROSHI (JP)
TANAKA HIROSHI (JP)
Application Number:
PCT/JP2018/011460
Publication Date:
September 27, 2018
Filing Date:
March 22, 2018
Export Citation:
Assignee:
JAPAN VILENE CO LTD (JP)
International Classes:
B01D39/16; B03C3/28; B32B5/02; D04H1/4382; D04H3/016
Domestic Patent References:
| WO2017018317A1 | 2017-02-02 |
Foreign References:
| JP2010534559A | 2010-11-11 | |||
| JP2013049021A | 2013-03-14 | |||
| JP5205650B2 | 2013-06-05 | |||
| JP2002001020A | 2002-01-08 | |||
| JP2010064010A | 2010-03-25 | |||
| JP2002001020A | 2002-01-08 | |||
| JP2003205210A | 2003-07-22 | |||
| JP2004066026A | 2004-03-04 | |||
| JP2011012372A | 2011-01-20 | |||
| JP2005264374A | 2005-09-29 |
Other References:
See also references of EP 3603767A4
Attorney, Agent or Firm:
SAKAMOTO Tomohiro (JP)
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