Process for the production of stretch-textured yarns with improved properties
US4034548A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 8, 1975 |
| Grant date | Jul 12, 1977 |
| Priority date | — |
| Expiry date | May 8, 1995 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD02G1/08
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The present invention relates to a process for the simultaneous stretch-texturing of synthetic, at least partly thermoplastic filaments or yarns using false twisters, more especially friction false twisters wherein the ratio S.sub.2 /S.sub.1 between the tractive or tensile forces S.sub.1, acting on the filament before the false twister, and S.sub.2, acting on the filament after the false twister, is adjusted to from 1.0 to 1.4 by adapting the ratio between the rotational speed of the false twister and the rate of travel of the filament or yarn, and the denier-related twisting of the yarn is from 5 to 50% higher than the level of twisting which is normally applied in conventional false-twist texturing processes using a spindle and which can be calculated on the basis of the Heberlein formula. Moreover, the invention relates to a yarn produced by the afore-described process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.