| abstract |
Provided is a water absorbent sheet suitable for hygienic materials such as disposable diapers. A water absorbent sheet according to an embodiment of the present invention is provided with a first base material, a second base material, and a particulate water absorbing agent sandwiched between the first base material and the second base material. At least one of the first base material and the second base material is a water permeable base material, and at least part of the particulate water absorbing agent satisfies the following physical properties (1), (2), and (3). (1) Centrifuge retention capacity (CRC) is 30 – 50 g/g. (2) Mass average particle diameter (D50) is 200 – 600 µm. (3) DRC index as prescribed by Equation (a) is 43 or less: DRC index = (49 − DRC 5-minute value)/(D50/1000) ... Equation (a). |