Process for the preparation of fibers from polymeric materials
US4600545A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 19, 1979 |
| Grant date | Jul 15, 1986 |
| Priority date | — |
| Expiry date | Mar 19, 1999 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21H13/14
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Polyolefin fibers, which are suited for at least partially substituting the cellulose fibers in the manufacture of paper, are produced by a process which consists in preparing in a pressure vessel a solution of a polyolefin at a temperature higher than the boiling temperature of the solvent under normal conditions, and under autogenous pressure or a pressure greater than the autogenous pressure, in ejecting said solution under the above stated conditions into a zone of lower pressure, in allowing the ejected solution to expand at least partially in said zone, and in then hitting the at least partially expanded solution with a jet of a high-speed fluid, which is at a temperature lower than that of the solution, and has an angled direction with respect to the direction of ejection of the solution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.