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:
Jan. 18, 2005
Filed:
Apr. 29, 2003
Ulrich Reinehr, Dormagen, DE;
Tilo Sehm, Düsseldorf, DE;
Wolfgang Anderheggen, Dormagen, DE;
Toni Herbertz, Dormagen, DE;
Ulrich Reinehr, Dormagen, DE;
Tilo Sehm, Düsseldorf, DE;
Wolfgang Anderheggen, Dormagen, DE;
Toni Herbertz, Dormagen, DE;
Bayer Aktiengesellschaft, Leverkusen, DE;
Bayer Faser GmbH, Dormagen, DE;
Abstract
Described are a process for producing elastane yarn having a linear density of at least 2500 dtex by the wet spinning process and the thereby producible coarse linear density elastane yarn having a wide cross section and a low residual solvent content. The process comprises the steps of spinning an up to 35% strength by weight stable-viscosity elastane solution into a coagulation bath, washing and optionally drawing, drying by contact heating, setting, spin finishing and winding the yarn, the filaments leaving the coagulation bath passing around a diverting roller disposed just above the coagulation bath liquid, the as-spun filament linear density amounting to not more than 1% of the value of the final linear density, the jet stretch ratio being within the range from 0.5 to 50, the contact heating temperature being at least 220° C. and the contact time of the elastane yarn being at least 2 seconds.