Hydrodynamic spinning of polymer fiber in coaxial laminar flows
US8834780B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 2, 2009 |
| Grant date | Sep 16, 2014 |
| Priority date | — |
| Expiry date | Jun 9, 2029 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01D5/38
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A polymer fiber is formed by hydrodynamic spinning. Fluids are forced to flow through a conduit to form a laminar flow comprising three or more layers of generally coaxial fluid flows, at respective flow rates selected to define a cross-section of a tubular middle layer of the fluid flows. The middle layer comprises a cross-linkable polymer precursor. Another layer of the fluid flows comprise a cross-linking agent. The polymer precursor, cross-linking agent and fluids are selected to prevent substantial diffusion of the polymer precursor away from the middle layer, and to allow a portion of the cross-linking agent to diffuse from the another layer into the middle layer to facilitate cross-linking of the polymer precursor in the middle layer to form a tubular polymer layer in a polymer fiber. The polymer layer thus has a cross-section generally corresponding to the cross-section of the middle layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.