Textiles: spinning – twisting – and twining – Apparatus and processes – Elements
Patent
1975-07-22
1976-07-27
Watkins, Donald E.
Textiles: spinning, twisting, and twining
Apparatus and processes
Elements
57157F, 57157AS, D02G 312
Patent
active
039712028
ABSTRACT:
Described is cobulked continuous filament yarn containing a first yarn and a second yarn having some special quality such as an electrically conductive yarn, a flame-retardant yarn, a yarn having soil release properties or a yarn having some aesthetic quality such as an unusual dye characteristic or unusual luster characteristic, in which the filaments of the second yarn are about 4 to about 20 percent longer than the filaments of the first yarn, whereby the effect of the second yarn is increased by an increase in the appearance of its filaments at the surface of the cobulked yarn. These cobulked continuous filament yarns are produced by drawing the first yarn by wrapping it at least four times around a pair of rolls driven at a rate at least twice the feed rate, wrapping a second continuous filament yarn having a lower shrinkage potential than the drawn, first yarn at least four times around the pair of rolls without drawing, combining the two yarns together on the rolls, and cobulking the combined yarn using a hot fluid bulking jet.
REFERENCES:
patent: 3186155 (1965-06-01), Breen et al.
patent: 3199281 (1965-08-01), Maerov et al.
patent: 3410076 (1968-11-01), Dyer
patent: 3410077 (1968-11-01), Marzocchi et al.
patent: 3447302 (1969-06-01), Field
patent: 3568424 (1971-03-01), Marshall
patent: 3582445 (1971-06-01), Okuhashi
patent: 3586597 (1971-06-01), Okuhashi
patent: 3691750 (1972-09-01), Waters
patent: 3911655 (1975-10-01), London et al.
E. I. Du Pont de Nemours and Company
Watkins Donald E.
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