Kao Corporation

Yasuhiro Y Yamamoto

Minoru Nakanishi

Mitsugu Hamajima

Hironori Kawasaki

Tetsuya Kusagawa

Kazumichi Masaki

Eichi Ichikawa

Mari Kaganoi

Yoshihito Kubota

The absorbent sheet comprising at least hydrophilic fibers and thermally fusible bonding fibers or a strengthening assistant, and a superabsorbent polymer is characterized in that:

Absorbent sheet, process for producing the same, and absorbent article

An absorbent member in an absorbent article comprises a absorbent polymer and cellulose fibers. The absorbent polymer has a centrifugal retentive capacity for physiological saline of 30 g/g or more and a permeation rate of physiological saline of 10 ml/minute or more. The cellulose fibers are crosslinked cellulose fibers obtainable by an intramolecular and/or intermolecular crosslinking of the cellulose fibers. Particularly, an absorbent member in a sanitary napkin has a centrifugal retentive capacity of pseudo-blood of 30 g or more and a permeation rate of pseudo-blood of 50 ml/minute or more. Also, a topsheet in the absorbent article comprises a liquid-permeable sheet, which comprises at least a layer in contact with a user's skin and a layer not in contact with the user's skin, the layers being overlaid and combined with each other into a unitary body. The layer in contact with the user's skin comprises a porous film of a thermoplastic resin or a nonwoven fabric of synthetic fibers. The layer not in contact with the user's skin comprises an absorbent sheet, which comprises at least bulky cellulose fibers. The absorbent member and the topsheet should preferably comprise crosslinked cellulose fibers.

Crosslinked cellulose fibers, absorbent papers and absorbent members

The absorbent sheet comprising at least hydrophilic fibers and thermally fusible bonding fibers or a strengthening assistant, and a superabsorbent polymer is characterized in that the superabsorbent polymer is not present on an absorbent surface of the absorbent sheet for absorbing liquid but distributed inside the absorbent sheet, and is adhered and fixed to the hyrophilic fibers constituting the absorbent sheet, the superabsorbent polymer is spread at an amount of 5 to 300 g per 1 m.sup.2 of the absorbent sheet and the absorbent sheet has thickness of 0.3 to 1.5 mm.

Absorbent sheet process for producing the same and absorbent article

The absorbent sheet according to the present invention is characterized in that:

Growing community of inventors

Tochigi-ken, Japan

Yasuhiro Y Yamamoto