Method of making improved polyester filaments, yarns and tows
US5145623A · kind A · utility
4Cited by
6References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 1, 1991 |
| Grant date | Sep 8, 1992 |
| Priority date | — |
| Expiry date | Nov 1, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S264/902
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Drawing, especially cold-drawing, or hot-drawing or other heat-treatments of spin-oriented crystalline polyester filaments, and particularly polyester feed yarns, that have been prepared by spinning at speeds of, e.g., 4 km/min, and have low shrinkage and no natural draw ratio in the conventional sense, provides useful technique for obtaining uniform drawn filaments of desired denier and thereby provides improved flexibility to obtain filaments and yarns of various sub-deniers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.