Method of spinning, spooling, and stretch texturing polyester filaments and polyester filaments produced

US6667096B2 · kind B2 · utility

Assignee

• Zimmer A.G. · DE

Inventors

• Dietmar Wandel · Hanau, DE
• Achim Dulling · Dresden, DE
• Ulrich Mirwaldt · Offenbach am Main, DE
• Alexander Klein · Troisdorf, DE

Key dates

• Filing date: Jun 25, 2002
• Grant date: Dec 23, 2003
• Expiry date: Jun 25, 2022

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/2913
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

Abstract

The present invention relates to a process for the production and for the spooling of preoriented polyester filaments comprising at least 90 weight %, relative to the total weight of the polyester filament, of polybutylene terephthalate (PBT) and/or polytrimethylene terephthalate (PTMT), preferably of PTMT, characterized in that:a) the spinline extension ratio is set in the range of 70 to 500;b) the filaments, immediately after exiting from the spinning nozzles, pass through a cooling delay zone from 30 mm to 200 mm in length;c) the filaments are cooled off to below the solidification temperature;d) the filaments are bundled at a distance of between 500 mm and 2500 mm from the lower side of the spinneret plate;e) the tension of the thread in front of and between the draw-off galettes is set to between 0.05 cN/dtex to 0.20 cN/dtex;f) the thread is spooled with a tension of the thread of between 0.025 cN/dtex to 0.15 cN/dtex;g) the spooling speed is adjusted to between 2200 m/min. and 3500 m/min.