Title:
WET-PROCESS NONWOVEN FABRIC AND PROCESS FOR PRODUCING THE SAME
Document Type and Number:
WIPO Patent Application WO/2004/094724
Kind Code:
A1
Abstract:
A wet-process nonwoven fabric constituted of inorganic fibers including bundled inorganic fibers and a binder ingredient with which the fibers are bonded, wherein the average number of fibers per bundle is 1.5 to 20 and the nonwoven fabric has a section in which the average value of Z/X which is represented by (the number of fibers in each bundle which are disposed adjacently in the thickness direction)/(the number of fibers in each bundle which are disposed adjacently in the plane direction) (average Z/X value) is 0.9 or lower; and a wet process for producing a nonwoven fabric which comprises: a step in which inorganic fibers are dispersed in an aqueous medium in the presence of an anionic dispersion stabilizer; a step in which a cationic compound is added to the resultant fiber dispersion to bundle fibers to produce a fiber dispersion containing fiber bundles; a step in which the resultant fiber dispersion containing fiber bundles is formed into a sheet by a wet papermaking method; and a step in which a binder is applied to the sheet obtained. This nonwoven fabric is a nonwoven inorganic-fiber fabric having a high density.
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Inventors:
NISHIKORI YOSHIHARU (JP)
TERAO TOMOYUKI (JP)
TERAO TOMOYUKI (JP)
Application Number:
PCT/JP2004/005742
Publication Date:
November 04, 2004
Filing Date:
April 21, 2004
Export Citation:
Assignee:
OJI PAPER CO (JP)
NISHIKORI YOSHIHARU (JP)
TERAO TOMOYUKI (JP)
NISHIKORI YOSHIHARU (JP)
TERAO TOMOYUKI (JP)
International Classes:
D21H13/40; D21H17/56; D21H21/08; H05K1/03; D21H17/37; D21H17/42; D21H17/43; D21H17/44; D21H17/45; D21H21/24; D21H23/76; (IPC1-7): D21H13/40; B29B11/16; H05K1/03
Domestic Patent References:
| WO2001075204A2 | 2001-10-11 |
Foreign References:
| JP2000308805A | 2000-11-07 | |||
| JP2002088627A | 2002-03-27 | |||
| JP2002127136A | 2002-05-08 | |||
| JP2002061093A | 2002-02-28 | |||
| JPH09208252A | 1997-08-12 | |||
| JPH05140336A | 1993-06-08 |
Other References:
See also references of EP 1616995A4
Attorney, Agent or Firm:
Kumakura, Yoshio . (Shin-Tokyo Bldg. 3-1, Marunouchi 3-chome, Chiyoda-k, Tokyo 55, JP)
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