METHOD FOR THE SPINNING AND WINDING OF POLYESTER FILAMENTS, POLYESTER FILAMENTS OBTAINED BY THE SPINNING METHOD, DRAW TEXTURING OF THE POLYESTER FILAMENTS AND BULKED POLYESTER FILAMENTS OBTAINED BY DRAW TEXTURING.

摘要

The present invention relates to a process for the production and for the spooling of preoriented polyester filaments which consist of at least 90 weight %, in relation 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 spinning delay is set in the range of 70 to 500; (b) the filaments, immediately after exiting from the spinning nozzle, 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 nozzle; (e) the tension of the thread in front of and behind the removal 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 6000 m/min; (h) and, a polyester is used, into which from 0.05 weight % to 2.5 weight % in relation to the total weight of the filament of additive polymer, is mixed as an expansion promoting agent.