Apparatus for extruding a single aromatic heterocyclic polymeric fiber
US5366362A · kind A · utility
2Cited by
24References
2Claims
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Key dates
| Filing date | Sep 4, 1992 |
| Grant date | Nov 22, 1994 |
| Priority date | — |
| Expiry date | Sep 4, 2012 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01D5/06
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An apparatus for making aromatic heterocyclic polymeric fibers having enhanced compressive strength is disclosed. Individual polymeric fibers, while being made according to otherwise conventional methods, are full twisted as they are drawn from a spinnerette hole so that their internal fibrils and microfibrils become entangled. The twisting is performed before coagulation of the fibers. The entangled fibrils and microfibrils are believed to provide mutual support to adjacent fibrils/microfibrils to resist buckling under compression.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.