Melt spinning of ultra-oriented crystalline filaments
US5268133A · kind A · utility
8Cited by
5References
10Claims
0Family size
Assignee
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Key dates
| Filing date | Feb 4, 1992 |
| Grant date | Dec 7, 1993 |
| Priority date | — |
| Expiry date | Feb 4, 2012 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01F6/62
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Ultra-oriented, crystalline synthetic filaments with high tenacity are produced by extrusion of a fiber-forming synthetic polymer melt into a liquid isothermal bath maintained at a temperature of at least 30.degree. C. above the glass transition temperature of the polymer, withdrawing the filaments from the bath and then winding up the filaments. Polyethylene terephthalate filaments so produced at 3000-5000 m/min exhibit a crystalline structure and possess birefringence of 0.20-0.22, tenacity of 7-9 g/d, break elongation of 14-30% and boil-off shrinkage of 5-10%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.