Title:
METHOD FOR MANUFACTURING FILTER MEDIUM FOR AIR FILTER
Document Type and Number:
WIPO Patent Application WO/2017/022052
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a method for manufacturing a filter medium for an air filter in which particle-collection performance is improved using cellulose nanofibers. The method for manufacturing a filter medium for an air filter according to the present invention is a method in which a liquid mixture that contains cellulose nanofibers and a dispersion medium is caused to adhere to an air-permeable support, whereupon freeze-drying is performed, wherein the number-average fiber diameter of the cellulose nanofibers is 1-50 nm, the dispersion medium comprises a mixture of water and a water-soluble organic solvent, and the solids concentration of the cellulose fibers in the liquid mixture is 0.001-0.150% by mass.
Inventors:
NEMOTO JUNJI (JP)
ISOGAI AKIRA (JP)
SAITO TSUGUYUKI (JP)
ISOGAI AKIRA (JP)
SAITO TSUGUYUKI (JP)
Application Number:
PCT/JP2015/071950
Publication Date:
February 09, 2017
Filing Date:
August 03, 2015
Export Citation:
Assignee:
HOKUETSU KISHU PAPER CO LTD (JP)
UNIV TOKYO (JP)
UNIV TOKYO (JP)
International Classes:
B01D39/00; B01D39/16; C08J9/36; D21H15/02
Domestic Patent References:
| WO2014057564A1 | 2014-04-17 |
Foreign References:
| JP2013253137A | 2013-12-19 | |||
| JP2010115574A | 2010-05-27 | |||
| JP2012081533A | 2012-04-26 | |||
| JP2008101315A | 2008-05-01 | |||
| JP2003082535A | 2003-03-19 | |||
| JP2012001626A | 2012-01-05 | |||
| JP2004204380A | 2004-07-22 |
Other References:
See also references of EP 3332856A4
Attorney, Agent or Firm:
IMASHITA, Katsuhiro et al. (JP)
Download PDF: