Method and apparatus for spinning a synthetic multi-filament yarn
US5698146A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 7, 1996 |
| Grant date | Dec 16, 1997 |
| Priority date | — |
| Expiry date | Mar 7, 2016 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD02J13/001
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A method and apparatus for spinning, drawing and winding a synthetic multi-filament yarn, wherein the yarn is subjected after drawing and prior to winding to a heat treatment for purposes of reducing its shrinkage tendency. In the heat treatment, the yarn advances along an elongated heating surface closely adjacent thereto but substantially in no contact therewith. The heating surface has a surface temperature which is above the melt point of the yarn. During the heat treatment, the yarn is subjected to a tension which is lower than the tension required for plastic deformation. The yarn wound by this method has a heat shrinkage tendency which is typically more than about 20%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.