Method for preparing a fibrous product containing cellulosic fibers and useful in particular, in the field of coverings in lieu of asbestos
US4545854A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 28, 1983 |
| Grant date | Oct 8, 1985 |
| Priority date | — |
| Expiry date | Nov 28, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/699
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The present invention is concerned with a new method for preparing a fibrous product containing cellulosic fibers and which is useful, in particular in lieu of asbestos, in the field of covering panels such as for instance wall and floor covering panels. Said method comprises the formation of a sheet according to a paper-making technique from an aqueous suspension comprising: PA0 slightly refined cellulosic fibers having a Schopper-Riegler degree comprised between 15 and 35, in association, if the occasion arises, with non-cellulosic fibers, PA0 an inorganic flocculating agent, PA0 an organic polymeric binder, and PA0 an inorganic filler, and the squeezing of the wet drained sheet under a linear load of 5 to 35 kg/cm, then the drying of the squeezed sheet. The sheet thus obtained is, if the occasion arises, subjected to a mechanical and/or chemical complementary treatment. The invention is also concerned with the sheet obtained according to this method, as a new industrial product.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.