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Title:
WATER ABSORBENT SHEET
Document Type and Number:
WIPO Patent Application WO/2011/043256
Kind Code:
A1
Abstract:
Disclosed is a water absorbent sheet comprising an absorbent layer, which contains a water absorbent resin and an adhesive, and nonwoven fabrics which are located above and below said absorbent layer so as to hold said absorbent layer, wherein said absorbent layer has a layered structure partitioned into a primary absorbent layer and a secondary absorbent layer by an air-permeable partitioning layer, at least one of said nonwoven fabrics is a spun bond nonwoven fabric, and, between said nonwoven fabrics, at least the lower nonwoven fabric is a hydrophilic nonwoven fabric. Although the aforesaid water absorbent sheet contains an extremely small amount of pulp and has a smaller thickness than the existing water absorbent sheets, said water absorbent sheet can secure the fundamental performance required for water absorbent sheets at a high level, exert a gel-blocking effect and avoid liquid leakage. These effects of the water absorbent sheet can be achieved by using a specific nonwoven fabric and employing a hydrophilic nonwoven fabric as the nonwoven fabric that is located below the absorbent layer.

Inventors:
MARUO JUNICHI
TSUNO SYUJI
MATSUSHITA HIDEKI
HANDA MASAYOSHI
Application Number:
PCT/JP2010/067225
Publication Date:
April 14, 2011
Filing Date:
October 01, 2010
Export Citation:
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Assignee:
SUMITOMO SEIKA CHEMICALS (JP)
MARUO JUNICHI
TSUNO SYUJI
MATSUSHITA HIDEKI
HANDA MASAYOSHI
International Classes:
A61F13/15; A61F13/49; A61F13/53
Domestic Patent References:
WO2010076857A12010-07-08
Foreign References:
JP2001046435A2001-02-20
JPH06315501A1994-11-15
JP2002325799A2002-11-12
JP2002224161A2002-08-13
JPH0158607U1989-04-12
JP2006513823A2006-04-27
JPH09510889A1997-11-04
JPH0857311A1996-03-05
JP2000238161A2000-09-05
JPH0751315A1995-02-28
JP2002325799A2002-11-12
JP2003011118A2003-01-15
JPH0248944A1990-02-19
Other References:
"Determination of Water Repellency", JAPAN TAPPI TEST METHOD NO. 68, 2000
Attorney, Agent or Firm:
HOSODA, YOSHINORI (JP)
Yoshinori Hosoda (JP)
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