Process for production of water-absorbing articles
US8623464B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 24, 2009 |
| Grant date | Jan 7, 2014 |
| Priority date | — |
| Expiry date | Sep 20, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
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·s.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.