POY polyester fiber for draw texturing and process for its production

摘要

Pre-oriented unstretched polyester fibre spun with a roll-up speed of at least 3000 m/min. (POY fibre), consisting of a copolyester (I) containing mainly ethylene terephthalate units and up to 10 wt% units derived from other dicarboxylic acids and/or diols and carboxy-phosphonic acid units of formula (II)in amounts equiv. to 30-500 ppm phosphorus based on polyester. R = 1-10C alkylene, cycloalkylene or arylene, Also claimed is a process for the production of this fibre.