Flash fibrillation process
US4183881A · kind A · utility
9Cited by
5References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 21, 1977 |
| Grant date | Jan 15, 1980 |
| Priority date | — |
| Expiry date | Sep 21, 1997 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD04H1/43835
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The stability of a flash fibrillation process for converting thermoplastics materials into fibrils by flash extruding a hot pressurized dispersion of thermoplastics material in liquid through an orifice is improved by inserting a pressure-responsive valve in the orifice which ensures the dispersion is at a specified minimum pressure before it is extruded through the orifice. The minimum pressure should be sufficient to ensure the liquid does not volatilize prior to its extrusion through the outlet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.