Title:
WATER-ABSORBING SHEET STRUCTURE
Document Type and Number:
WIPO Patent Application WO/2011/117997
Kind Code:
A1
Abstract:
Disclosed is a water-absorbing sheet structure having a configuration in which an absorption layer comprising a water-absorbing resin has been sandwiched, from the upper and lower sides thereof, between sheets of hydrophilic nonwoven fabric, characterized in that the upper surface and/or the lower surface of the water-absorbing sheet structure has been embossed and that the water-absorbing sheet structure, when physiological saline is absorbed in the water-absorbing sheet structure in an amount of 4 L per m2 of the sheet structure (4 L/m2), satisfies both of the following relationships (A) and (B): (A) the swelling ratio by thickness (T2/T1) is 2 or more and (B) the depth of the swelled embossing valleys [(T2-t2)/T2] is 0.7 or more (T1 is the thickness (mm) of the water-absorbing sheet structure before absorption of physiological saline, T2 is the thickness (mm) of the water-absorbing sheet structure after the absorption of physiological saline, and t2 is the thickness (mm) of the embossing valleys of the water-absorbing sheet structure after the absorption of physiological saline). Even when thin, the water-absorbing sheet structure has satisfactory shape retentivity and, hence, does not deform before and after liquid absorption. The sheet structure further produces the excellent effect of sufficiently showing liquid-absorbing ability such as excellent liquid infiltration properties and little liquid leakage.
Inventors:
TAKATORI JUNICHI
MATSUSHITA HIDEKI
SAKATA JUN
INABA HARUKA
MATSUSHITA HIDEKI
SAKATA JUN
INABA HARUKA
Application Number:
PCT/JP2010/055222
Publication Date:
September 29, 2011
Filing Date:
March 25, 2010
Export Citation:
Assignee:
SUMITOMO SEIKA CHEMICALS (JP)
TAKATORI JUNICHI
MATSUSHITA HIDEKI
SAKATA JUN
INABA HARUKA
TAKATORI JUNICHI
MATSUSHITA HIDEKI
SAKATA JUN
INABA HARUKA
International Classes:
A61F13/49; A61F13/53
Domestic Patent References:
| WO2010004894A1 | 2010-01-14 |
Foreign References:
| JP2003510165A | 2003-03-18 | |||
| JPH0253968A | 1990-02-22 | |||
| JP2006051218A | 2006-02-23 | |||
| JPH05300922A | 1993-11-16 |
Other References:
See also references of EP 2550946A4
Attorney, Agent or Firm:
HOSODA, YOSHINORI (JP)
Yoshinori Hosoda (JP)
Yoshinori Hosoda (JP)
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Claims: