Coated wallboard employing unbleached face paper comprising a coating containing soy protein
US5945198A · kind A · utility
15Cited by
14References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 12, 1997 |
| Grant date | Aug 31, 1999 |
| Priority date | — |
| Expiry date | Sep 12, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31996
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A coating for providing a cover sheet used in the manufacture of wallboard with a light colored finish without the use of manila top plies is disclosed. The coating has a porosity adapted to allow evaporation of moisture from the wallboard core through the cover sheet, and maintain a desired smooth appearance. A high pigment-to-binder ratio is used to provide porosity, with soy protein being added to further enhance the porosity of the coating. The coating may be applied through various conventional methods of coating paper such as roll, spray, curtain, rod and vacuum.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.