Method for targeted delivery of additives to varying layers in gypsum panels
US7435369B2 · kind B2 · utility
17Cited by
60References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 19, 2004 |
| Grant date | Oct 14, 2008 |
| Priority date | — |
| Expiry date | Nov 13, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T156/1062
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method of manufacture of multilayer gypsum board, and a gypsum additive delivery system, including wet gypsum board passing through a board forming station in which additives are delivered to one or more layers of a multi layered gypsum board panels, such as engineered polymers, providing a better and more water resistance surface. Preferably, the gypsum board has a first layer of a mixture of set gypsum having an outer surface and a polymeric compound or wax emulsion additive entrained therein and impregnated in a thin sheet of randomly aligned inorganic fibers to essentially encase the core gypsum within two facing layers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.