Title:
FILTER MATERIAL FOR AIR FILTER
Document Type and Number:
WIPO Patent Application WO/2020/203480
Kind Code:
A1
Abstract:
A filter material for an air filter, wherein two or more layers of nonwoven fabric are bonded by fusing, a plurality of design elements that are formed by the shapes of fused sections become a group to form a design showing a repeating pattern, the average area of one design element is 1-4.2mm2, the minimum distance between neighboring design elements is 10mm or less, and the value of the fused section obstruction rate (percentage) divided by the average area of one design element is 0.8-1.2%/mm2, said fused section obstruction rate corresponding to the ratio of the total area of the design elements included in the repeating pattern to the area of the repeating pattern formed by the design elements.
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Inventors:
SATO FUMIHIRO (JP)
MATSUOKA MASANOBU (JP)
HOSAKA KENICHI (JP)
MATSUOKA MASANOBU (JP)
HOSAKA KENICHI (JP)
Application Number:
PCT/JP2020/013091
Publication Date:
October 08, 2020
Filing Date:
March 24, 2020
Export Citation:
Assignee:
MITSUBISHI PAPER MILLS LTD (JP)
International Classes:
B01D39/16; B32B5/26; D04H1/4374
Foreign References:
| JP2010121241A | 2010-06-03 | |||
| JPH07256026A | 1995-10-09 | |||
| JP2011529779A | 2011-12-15 | |||
| US5900305A | 1999-05-04 | |||
| KR20170035115A | 2017-03-30 | |||
| JP2019173194A | 2019-10-10 |
Attorney, Agent or Firm:
ONO, Hisazumi et al. (JP)
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