Patent ID: 8445067
Filing Date: 2013-05-21
Classification: A61F,B05D

Abstract:
1. A method for pattern-coating a dispersion slurry containing a water-absorbing solid dispersed in a liquid medium on a surface of a substrate sheet in production of a water-absorbing sheet being a two-layer structure consisting of the substrate sheet and a layer containing the dispersion slurry disposed on the surface of the substrate, comprising the steps of: providing an apparatus for pattern-coating the dispersion slurry on the substrate sheet which comprises: forming a layer containing said dispersion slurry between an upper layer and a lower layer by supplying the dispersion slurry in a space between an upper layer and a lower layer, said upper layer being the flexible cover film and said lower layer being the substrate sheet traveling under said upper layer, and filling said space with said dispersion slurry; and forming a convex-and-concave pattern in said layer containing dispersion slurry while said upper layer and lower layer are in contact with said dispersion slurry by rotating the rotating pattern roll having the convex-and-concave pattern at the circumference surface thereof into the same direction as the traveling direction of the substrate sheet, while pushing said flexible cover film with the convex portions from an upper portion of said flexible cover film, wherein the convex-and-concave pattern roll comprises at least a pattern adapted to form the layer containing said dispersion slurry in a discontinuous manner in the same direction as the travelling direction of the substrate sheet.