Textiles: spinning – twisting – and twining – Apparatus and processes – Elements
Patent
1975-12-11
1977-11-29
Petrakes, John
Textiles: spinning, twisting, and twining
Apparatus and processes
Elements
57157TS, 428371, 428399, D02G 102, D02G 334
Patent
active
040599507
ABSTRACT:
A polyester yarn composed of a plurality of individual fibrous materials such as endless filaments or fibers. Each of these fibrous material is provided with cross-sectional thicker portions, thinner cross sectional portions and intermediate thickness-size portions randomly distributed along the axial direction thereof in a particular condition of distribution of cross-sections of these fibrous material. The above-mentioned polyester yarn involved a textured yarn applied to a drawn polyester multifilament yarn having the above-mentioned basic condition. To produce the polyester yarn according to the present invention, it is the basic condition that the undrawn polyester multifilament yarn should be drawn under a condition of a drawing ratio below a natural draw ratio of undrawn filaments of said undrawn multifilament yarn and a drawing temperature over a crystallizing initiating temperature of said undrawn filaments.
REFERENCES:
patent: 3425206 (1969-02-01), Holton
patent: 3587221 (1971-06-01), Buzano
patent: 3683610 (1972-08-01), Buzano
patent: 3691748 (1972-09-01), Buzano
patent: 3698177 (1972-10-01), Nyfeler
patent: 3772747 (1973-11-01), Buzano
Negishi Takao
Tomiita Kazuo
Petrakes John
Toray Industries Inc.
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