Central Glass Company, Limited

Yukihiro Ougitani

Yoshinori Akamatsu

Shigeo Hamaguchi

Shinobu Arata

According to a first aspect of the present invention, a process for production of a water-absorbing article including a substrate and a coating film formed on the substrate and formed of a water-absorbing urethane resin is characterized in that: the process comprises an application step of applying a coating liquid to the substrate; the application step includes a step of supplying the coating liquid from a nozzle disposed above the substrate to a surface of the substrate conveyed horizontally; the coating liquid includes a solid matter and a solvent; the solid matter includes a mixture of a polyisocyanate, a polyol having ethylene oxide and a hydrophobic polyol; 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&#xb7;s.

Process for production of water-absorbing articles

The present invention relates to an antifogging film formed on a transparent substrate. The antifogging film is characterized in that the film comprises a urethane resin having a water absorption percentage of 20-40 wt %, that the urethane resin is one derived from an acrylic polyol having an average molecular weight of 1000-4000 and a polyoxyalkylene-series polyol having an average molecular weight of 400-5000, that the film is used in an interior environment having a mechanism to forcibly remove water from the film after the water absorption saturation of the film, and that a water film is not formed upon showing antifogging property.

Growing community of inventors

Matsusaka, Japan

Yukihiro Ougitani