Aqueous-quench spinning of polyamides
US5362430A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 16, 1993 |
| Grant date | Nov 8, 1994 |
| Priority date | — |
| Expiry date | Jul 16, 2013 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01D5/0885
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Molten polyamide filaments are extruded from spinneret capillaries through a gas-filled gap and into a quench bath which contains a heated aqueous liquid. The bath has a nozzle defining a vertically disposed cylindrical passageway with its entrance in the bath below the bath surface. The filaments are converged into a filament bundle at the entrance and withdrawn from the exit of the passageway at a withdrawal speed of about 1500 to about 3500 meters per minute. The polyamide polymer is extruded from the spinneret such that the jet velocity in the spinneret capillaries is between 2 and 10% of the withdrawal speed of the filament from the exit of the nozzle passageway.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.