Process for the production of squared-analogous cross-section polyamide yarns and uses thereof
US8211340B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 13, 2008 |
| Grant date | Jul 3, 2012 |
| Priority date | — |
| Expiry date | May 4, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2915
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The present invention relates to a process for the production of a yarn consisting of a squared-analogous cross-section polyamide filament for uncoated airbag fabrics, characterized in that the process comprises the steps of: heating and melting a raw material of polyamide, extruding the molten polyamide through a squared-analogous spinning nozzle to form a spun filament, cooling and solidifying the spun filament, followed by drawing the filament, to obtain a squared-analogous cross-section drawn yarn; to uncoated fabrics for the manufacture of airbags prepared by the said process, characterized in that the fabrics are prepared from a yarn consisting of a squared-analogous cross-section polyamide filament and exhibit low air permeability, enhanced flame resistance and aging performance against the environment; and to a use of the uncoated fabrics for the manufacture of airbags with a low air permeability prepared therefrom.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.