Melt spinning process and apparatus
US6132670A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 24, 1998 |
| Grant date | Oct 17, 2000 |
| Priority date | — |
| Expiry date | Nov 24, 2018 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01D5/16
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A process for spinning polymeric filaments into yarn at high spinning speeds for producing yarn of high quality that includes the steps of extruding molten polymer through a spinneret, providing an aspirator at a preselected position relative to the slinneret and, after start up, adjusting the aspirator distance from the spinneret thereby moving the aspirator drawing force closer to the spinneret, forming a yarn path made from the filaments, supplying a finish to the yarn, and drawing the yam up with a take up wheel The spinning speed of the yarn on the take up reel is increased while moving the aspirator containing the drawing force within five to fifty centimeters to the spinneret. Using this method much higher filament velocities can be reached (above 10,000 meters per minute) without breaking the filaments or the yarn. The essence of the present invention is to be able to alter the position of the drawing for exerted on filaments from the aspirator to within a close distance to the spinneret where material is still in a molten stage and the spin line tensions maximally reduced thereby allowing the take up wheel speed to be significantly increased without breaking the filaments.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.