Process for obtaining polyamide yarns with better output efficiency
US5405697A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 10, 1994 |
| Grant date | Apr 11, 1995 |
| Priority date | — |
| Expiry date | Aug 10, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2933
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An improved output efficient polyamide-based preoriented yarn spun at a speed of at least 4000 m/min and obtained by introducing, before the spinning, of a quantity of 0.05 to 1% by weight of pyrogenic silica of particle size of between 5 and 15 nm into the molten polymer in the form of dispersion in a master mix of the same polyamide as that intended to be processed, the filaments after spinning being then cooled by means of a gas stream at room temperature and then sized and wound at a speed of between 4200 and 5800 m/min. The preoriented yarns thus prepared exhibit a delay in the orientation and are obtained with a gain in output efficiency of at least 10%, generally at least 15%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.