Polyester yarn is made by melt spinning the polyester filaments which are then cooled at least to solidification and heated by counterflow with prestretching to a crystallinity in excess of 24%. The prestretched filaments are gathered and stretched to after-stretching at a temperature of 80 DEG C to 250 DEG C to a final titer of 1.0 dtex to 7.5 dtex with a stretching ratio of 1:1.5 to 1:1.15. The yarn is then wound up at a rate of 5000 to 8000 m/min.

Title
Method of and apparatus for the production of polyester yarn
Application Number
088105945
Publication Number
475011
Application Date
April 14, 1999
Publication Date
February 1, 2002
Inventor
Hartig Jurgen
Efflander Ingo
Geier Rudolf
Assignee
Krupp Uhde
IPC
D01D 010/02
D01D 005/16
D01F 006/62