High strength low shrinkage polyester drawn yarn, and a...

Details High strength low shrinkage polyester drawn yarn, and a... High strength low shrinkage polyester drawn yarn, and a...

2007-04-03

2007-04-03

Edwards, N. (Department: 1774)

Stock material or miscellaneous articles

Coated or structually defined flake, particle, cell, strand,...

Rod, strand, filament or fiber

C428S395000

Reexamination Certificate

active

10522247

ABSTRACT:
The present invention discloses a high strength low shrinkage polyester drawn yarn used as industrial yarns and a process or producing the same. The strength low shrinkage polyester drawn yarn has a thermal relaxation stress change ratio of 5 to 100% and a thermal relaxation stress area ratio of 50 to 140% on a thermal relaxation and shrinkage stress curve with a final temperature set to 170% C. The process for producing a high strength low shrinkage polyester drawn yam by a direct spin draw (DSD) process in which a quenching delay region I is mounted, wherein the high strength low shrinkage polyester drawn yarn is produced in such methods that a spinning oil is attached to the yarn being spun with an oiling apparatus8mounted at the position 500 to 1,500 mm below from the lower bottom surface of the insulating board3, the relaxation stress of the yarn is controlled with one or tow tension guides9mounted between Godet rollers of a relaxation region III, or both oiling apparatus8and tension guides9are mounted.

REFERENCES:
patent: 4690866 (1987-09-01), Kumakawa et al.
patent: 5106685 (1992-04-01), Speaker
patent: 5472781 (1995-12-01), Kim et al.
patent: 5658665 (1997-08-01), Kim et al.
patent: RE36698 (2000-05-01), Kim et al.

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