Patent ID: 8623464

Claim:
A process for production of a water-absorbing article including a substantially flat, plate-shaped substrate and a coating film formed on the substrate, the coating film being formed of a water-absorbing urethane resin, the process comprising an application step of applying a coating liquid to the substrate, the application step including a step of supplying the coating liquid from a nozzle to a surface of the substrate, the nozzle being disposed above the substrate conveyed horizontally, wherein the coating liquid includes a solid matter and a solvent, the solid matter including a mixture of a polyisocyanate, a polyol having ethylene oxide and a hydrophobic polyol; the solvent includes a methyl ethyl ketone accounting for 80% or more of the solvent in mass; a concentration of the solid matter in the coating liquid is adjusted within a range from 5 to 30% in mass; and a viscosity of the coating liquid is adjusted within a range from 1 to 3 mPa·s.