WATER ABSORBENT SHEET AND WATER ABSORBENT ARTICLE COMPRISING SAME

WIPO Patent Application WO/2020/032282

A1

[Problem] To provide a novel water absorbent sheet capable of significantly reducing the amount of return liquid even when a large amount of liquid is introduced without pressure as a result of multiple times (in particular, three or more times) of intermittent introduction of the liquid. [Solution] This water absorbent sheet has a first substrate, a second substrate, and a water absorbent layer between the first substrate and the second substrate. The first substrate is a water permeable sheet located on the side where a liquid to be absorbed is introduced. The water absorbent layer has: an interlayer sheet; a first particulate water-absorbing agent localized at the surface of the first substrate on the side facing the second substrate; and a second particulate water-absorbing agent localized at the surface of the second substrate on the side facing the first substrate. The percentage of a mixture of the first particulate water-absorbing agent and the second particulate water-absorbing agent passing through the interlayer sheet is less than 60%, and the second particulate water-absorbing agent has a GPR of 45.0 g/min or more.

NODA YUIKA (JP)
TORII KAZUSHI (JP)
UEDA HIROKO (JP)
KITANO TAKAHIRO (JP)
HIRAUCHI TATSUFUMI (JP)
HORIMOTO YUICHIRO (JP)
HIRAOKA RYUICHI (JP)
IKEUCHI HIROYUKI (JP)

PCT/JP2019/031784

February 13, 2020

August 09, 2019

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NIPPON CATALYTIC CHEM IND (JP)

A61F13/53; A61L15/60; B01J20/26; B01J20/28; C08L101/14

WO2013099634A1	2013-07-04
WO2016204302A1	2016-12-22

JP2017158690A	2017-09-14
JPH0659039U	1994-08-16
JP2006055833A	2006-03-02

HATTA & ASSOCIATES (JP)

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