Process and apparatus for the production of yarn
US8419989B2 · kind B2 · utility
0Cited by
19References
17Claims
0Family size
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Key dates
| Filing date | Oct 30, 2007 |
| Grant date | Apr 16, 2013 |
| Priority date | — |
| Expiry date | Oct 30, 2027 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C48/919
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The present invention concerns a process and apparatus for spinning polymer filaments comprising extruding a polymer solution to form one or more filaments into an air gap above a coagulation liquid, where the filaments are subject to strain; forming a downward stream of liquid and filaments by contacting the polymer solution with a coagulation liquid; passing the filaments and liquid through a quench tube; contacting the liquid with a surface such that the downward force of gravity on the liquid does not increase the strain of the filaments in the air gap; and separating the liquid from the filaments.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.