Continuous hollow filament, yarns, and tows
US5356582A · kind A · utility
13Cited by
2References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 9, 1992 |
| Grant date | Oct 18, 1994 |
| Priority date | — |
| Expiry date | Nov 9, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2975
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Hollow polyester undrawn filaments having excellent mechanical quality and uniformity are prepared by a simplified post-coalescence melt spinning process at speeds of e.g. 2-5 km/min by selection of polymer and spinning conditions whereby the void content of the undrawn filaments can be essentially maintained or even increased when drawn cold or hot, with or without post heat-treatment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.