Production of fibrils
US4007247A · kind A · utility
8Cited by
13References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 20, 1973 |
| Grant date | Feb 8, 1977 |
| Priority date | — |
| Expiry date | Sep 20, 1993 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01F6/04
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Fibrils of thermoplastic polymer, particularly crystalline thermoplastic polymers such as polyethylene and polypropylene, are prepared by forcing a dispersion of heat softened polymer particles in a liquid medium through a pair of opposed co-axial orifices. The liquid medium is preferably aqueous and is pressurized to prevent boiling. The resulting fibrils have some degree of molecular orientation, and may be useful in the production of reinforced paper.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.