Process for the dyeing of synthetic fibers

Details Process for the dyeing of synthetic fibers Process for the dyeing of synthetic fibers

D - Textiles, Paper

06

P

8/31, 8/51

D06P 3/00 (2006.01) D06B 21/02 (2006.01) D06P 3/38 (2006.01) D06P 3/82 (2006.01) D06P 5/20 (2006.01)

Patent

CA 1053857

ABSTRACT OF THE DISCLOSURE Process for the exhaust dyeing of wound bodies of synthetic fiber materials with water-insoluble developing black dyestuffs on the basis of the diazo and oxydation dyeing technique, wherein the wound-up textile material is heated to temperatures in the range of from 105° to 135° C in a pressure-tight dyeing vessel by replacing the air in said dyeing vessel by saturated or superheated steam, preparing the total dyebath in a separate batch vessel, which is likewise pressure-tight but connected with said dyeing vessel by pipes, also heating said dyebath to temperatures in the range of from 105° to 135°C. Control is maintained of the temperature within the mentioned limit values, the steam pressure in both closed systems and/or the application of external pressure securing the building up of a relative excess pressure of 5 to 10 atmospheres gauge in the batch vessel, and the hot dyeing liquor is pressed by the differential pressure within 3 to 60 seconds simultaneously from inside and from outside into the dry or wet wound bodies.

221029

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