The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 12, 1977
Filed:
May. 08, 1975
Bayer Aktiengesellschaft, Leverkusen, DT;
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.