Method of manufacturing improved mineral board
US4297311A · kind A · utility
16Cited by
3References
33Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 17, 1979 |
| Grant date | Oct 27, 1981 |
| Priority date | — |
| Expiry date | Oct 17, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31942
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method of producing an improved mineral board and the resulting product are disclosed. According to the present invention, the board is predominantly composed of perlite and a binder therefor, preferably urea-formaldehyde resin. The perlite is crushed after the composition is in its final shape but before the binder is set whereby its strength is substantially increased. The composition and process of making the board substantially reduce energy costs as compared to known methods for making wet-process mineral boards. The product composition may include up to 95% perlite by weight.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.