04112668 is referenced by 11 patents and cites 8 patents.

The method for production of polyester staple yarn having sufficiently low elongation and shrinkage and high tenacity and modulus for use in thread, sewing thread, cord, twine and in cordage products, wherein a tow of conventionally spun polyester filaments is drawn in an aqueous draw zone and then dried at 130.degree. to 140.degree. C, stretched 1.1 to 1.2X and then heat set at 170.degree. to 200.degree. C. The tow is then crimped, cut to staple and spun into yarn. The dwell time between the drying step and the step of stretching 1.1 to 1.2 times is sufficiently low that this stretch can be accomplished before the fibers in the tow can crystallize to the point that this stretch cannot be achieved. Dwell time in the heat set zone must be at least 10 seconds.

Title
Method for treating polyester filaments
Application Number
729566
Publication Number
4112668
Application Date
June 17, 1977
Publication Date
September 12, 1978
Inventor
Herbert A Spiller
Pine Bluff
AR, US
Agent
Robert L Broad Jr
Assignee
Monsanto Company St Louis Missouri
AL, US
IPC
D01G 1/06
D02J 1/22
View Original Source