Thermotropic aromatic polyester(amide) monofilament
US6550507B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 6, 1999 |
| Grant date | Apr 22, 2003 |
| Priority date | — |
| Expiry date | Dec 6, 2019 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01F6/82
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An as-spun monofilament of thermotropic aromatic polyester(amide), which satisfies the following conditions: D≧40; Te>45; &Dgr;L≧0, D being its diameter (in &mgr;m), Te its tenacity (in cN/tex) and &Dgr;L its variation in length (in %) after 2 minutes at 235±5° C. at an initial tension of 0.2 cN/tex. A spinning process for obtaining such a monofilament, including, upon emergence from the spinneret, of structuring the flow of the polymer by stretching in a layer of gaseous fluid for a predetermined time which is a function of the diameter D, before thermally quenching the flow of polymer thus structured in a liquid, so as to solidify it.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.