Process for improving the properties of a feed yarn of undrawn polyester filaments
US5229060A · kind A · utility
5Cited by
6References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 3, 1991 |
| Grant date | Jul 20, 1993 |
| Priority date | — |
| Expiry date | Sep 3, 2011 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD02J1/22
- 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 kg/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 denier. The resulting uniform filaments have useful properties that are improved in certain respects.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.