Method of and apparatus for the production of polyester yarn

Details Method of and apparatus for the production of polyester yarn Method of and apparatus for the production of polyester yarn

1999-04-02

2000-11-21

Tentoni, Leo B.

Plastic and nonmetallic article shaping or treating: processes

With twining, plying, braiding, or textile fabric formation

2642107, 2642108, 26421112, 26421115, 26421117, 425 66, 425377, 4253782, 4253791, 4253822, 425464, D01D 5084, D01D 5088, D01D 516, D01F 662

Patent

active

061498475

ABSTRACT:
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.degree. C. to 250.degree. 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.

REFERENCES:
patent: 5965073 (1999-10-01), Geier et al.

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