Akihiro Kimura, Kanonji, Japan; Hiroyuki Muto, Toyohashi, Japan; Norio Hakiri, Toyohashi, Japan; Hideyo Yoshikawa, Toyohashi, Japan; Atsunori Matsuda, Toyohashi, Japan; and Go Kawamura, Toyohashi, Japan.
Assigned to Unicharm Corporation, Ehime, Japan.

Filed: 11/4/14
Issued: 3/28/17

A composite material for an absorbent article, comprising a substrate material having a surface which is positively or negatively electrostatically charged in a predetermined solvent selected from a non-polar organic solvent, a polar organic solvent, and a mixed solvent of a polar organic solvent and water, and a water absorbent material adsorbed thereon by electrostatic interaction, having a surface which is electrostatically charged to an electric charge opposite to that of the surface of the substrate material, wherein the substrate material comprises a fibrous base material or resinous base material and a polyelectrolyte layer provided in a surface layer thereof, and/or, the water absorbent material has a water absorbent particulate base material or water absorbent fibrous base material and a polyelectrolyte layer provided in a surface layer thereof.