Method for manufacture of a non-woven fibrous web
US4543156A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 26, 1984 |
| Grant date | Sep 24, 1985 |
| Priority date | — |
| Expiry date | Jan 26, 2004 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21F11/002
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Apparatus and method for the manufacture of a non-woven fibrous web such as paper from a dispersion of fibers in a foamed liquid in which fiber furnished in a foamed liquid comprising a solution of surfactant in water is discharged from a headbox into the nip of a twin forming wire prior to its passage over a forming roll. The water-surfactant solution is drained from the web and recycled as a foamed liquid containing about 65% air in the form of bubbles of from about 20 to about 200 microns in diameter. The foamed liquid is directed into a mix tank wherein a slurry containing fiber at 20% to 55% solids is added and mixed. The mixture is pumped to the headbox and into the nip of the forming wires.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.