Process for the indigo dyeing of yarns in skeins

Details Process for the indigo dyeing of yarns in skeins Process for the indigo dyeing of yarns in skeins

1993-07-13

1994-11-08

Coe, Philip R.

Bleaching and dyeing; fluid treatment and chemical modification

Fluid treatment

Combined liquid and gas or vapor

81512, 81552, 68 22R, 68161, 68175, 68181R, D06B 309

Patent

active

053614380

ABSTRACT:
Process for the indigo dyeing of yarns in skeins having the peculiarity that it consists in placing a skein of yarn on at least two spaced rollers, in at least partially impregnating the skein in an indigo dyeing bath drawn continuously from a main indigo dyeing bath of a plant for the continuous dyeing of yarns in ropes or bands, in exposing the impregnated part to air for its oxidation, in alternately repeating impregnation and oxidation for a preset number of times which is a function of the color intensity to be obtained, in washing the skein to remove the residue of dye which has not been fixed on the fiber and in drying the skein.

REFERENCES:
patent: 668694 (1901-02-01), Steenberghe
patent: 1417825 (1922-05-01), Halter
patent: 3512193 (1970-05-01), Kronsbein
patent: 4123921 (1978-11-01), Eakes

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