Process for the production of polyamide-6-filaments of the .gamma.-modification
US4102965A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 10, 1976 |
| Grant date | Jul 25, 1978 |
| Priority date | — |
| Expiry date | Mar 10, 1996 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01F11/08
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The invention is related to a process for the production of continuous polyamide-6-filaments present in the .gamma.-modification both before and after stretching at room temperature by spinning polyamide-6 with a relative solution viscosity of from 2.3 to 3.1, preferably from 2.6 to 2.85, as measured on a 1% solution in m-cresol, wherein the filaments (a) after leaving the spinneret, are cooled by air-blowing and preoriented up to an elongation at break of from 50 to 80%, preferably from 55 to 75%, by being run off, preferably in the absence of godets, at a speed of 3700 to 4500 m/min; (b) before winding into package form and during take-off, are prepared with an aqueous preparation oil in such a way that they contain less than 3.0% by weight of water, and (c) before winding into package form are subjected to interlacing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.