SEMI-CONTINUOUS PROCESS FOR DYEING KNITTING GOODS FROM CIRCULAR KNITTING MACHINES, AND CONTAINING CELLULOSIC FIBRES, WITH AZOIC DEVELOPING DYES

摘要

In the dyeing of cellulose knitted fabrics in hose form, according to a two-bath procedure, with azo dyes produced on the fiber by coupling of their formation components, it was hitherto impossible on an industrial scale to forward the developing liquor in a sufficiently rapid manner into the interior of the textile hose, after impregnation of said tubular goods in a winch beck using the exhaust technique. Dyestuff development without intermediate drying was impeded by the insufficient liquor uptake of the flattened textile material that had previously been impregnated on subsequent slop-padding wet-in-wet with the developing liquor. By incorporation of an auxiliaries' combination comprising homo- or copolymers of acrylic acid amide and a wetting agent in said developing liquor, the liquor uptake thereof by the moist fiber material is increased and the penetration rate of this liquor during the coupling is incited in such a manner that textile hoses which exhibit even, well penetrated dyeings are obtained. Dyeing of tubular knitted fabrics, especially in hose form, with azo developing dyes has become safe only in accordance with this invention.