Title:
AIR FILTER MATERIAL
Document Type and Number:
WIPO Patent Application WO/2008/032388
Kind Code:
A1
Abstract:
A low-cost nonwoven fabric based air filter material that without the use of split
fiber, not only has dust leakage resistance but also is low in initial airflow
resistance, exhibiting well-balanced performance in, for example, dust or
carbon soot initial cleaning efficiency and life. There is provided an air filter
material comprising a laminate of dust layer and cleaning layer, which air filter
material has an average flow rate pore diameter of 20 to 40 μm, a minimum
pore diameter of 2.4 to 3.8 μm and a maximum pore diameter of 80 μm
or less. The dust layer is a needle punched nonwoven fabric layer of 55 to 100 g/m2
fiber basis weight. The cleaning layer is a laminated spunlace nonwoven fabric
consisting of a laminate of at least two spunlace nonwoven fabric layers of 20
to 60 g/m2 fiber basis weight, 50 to 90 μm average flow rate pore
diameter, 3.0 to 10.0 μm minimum pore diameter and 180 μm or less
maximum pore diameter.
Inventors:
UMEZU NORIO (JP)
MIZUI KAZUMASA (JP)
MIZUI KAZUMASA (JP)
Application Number:
PCT/JP2006/318291
Publication Date:
March 20, 2008
Filing Date:
September 14, 2006
Export Citation:
Assignee:
DYNIC CORP (JP)
UMEZU NORIO (JP)
MIZUI KAZUMASA (JP)
UMEZU NORIO (JP)
MIZUI KAZUMASA (JP)
International Classes:
B01D39/16; B01D39/18; B01D46/52; D04H1/492; D04H1/498; F02M35/024
Foreign References:
| JPH0824535A | 1996-01-30 | |||
| JP2003340220A | 2003-12-02 | |||
| JPH08192016A | 1996-07-30 | |||
| JP2002045624A | 2002-02-12 | |||
| JPH0427403A | 1992-01-30 | |||
| JPS62279817A | 1987-12-04 | |||
| JPH04193316A | 1992-07-13 | |||
| JPH0549825A | 1993-03-02 |
Attorney, Agent or Firm:
TAJIME & TAJIME (New-Well-Ikuta Bldg. 26-28, Mita 1-chome, Tama-k, Kawasaki-shi Kanagawa 34, JP)
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