Process for the continuous dyeing of cellulose fibers or mixtures thereof with synthetic fibers with water-insoluble azo dyestuffs developed on the fiber
AssigneeHoechst Aktiengesellschaft
InventorHans-Ulrich VON DER Eltz
Life of this patent
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Abstract
Process for the continuous dyeing of textile material made of cellulose fibers or their mixtures with synthetic fibers in the form of endless ropes by developing water-insoluble azo dyestuffs on the fiber, which comprises impregnating the textile material at first with the alkaline bottoming bath by means of a Venturi tube or a system of Venturi tubes and then, optionally after intermediate rinsing or dwelling, treating the textile material with the acidic developing liquor and aftertreating and finishing it in the usual manner.
Claims14
A process for the continuous dyeing of fibers or filaments of natural or regenerated cellulose, or of a material comprising fibers or filaments of natural or regenerated cellulose, in rope form, which comprises:
- applying to the rope, by means of at least two dyeing liquors, the components for producing a water-insoluble developing azo dyestuff on the fibers or filaments, the first dyeing liquor applied to the rope being an alkaline liquor containing a dyestuff coupling component and bein applied to passing the rope through a conduit having a constriction therein and a liquor application jet or jets positioned at or before the constriction, such that the applied liquor has an opening effect on the rope.
A process as claimed in claim 1, wherein the second dyeing liquor is applied to the rope in one or more stages, the application of said second dyeing liquor being in the manner recited in claim 9 for the first dyeing liquor.
A process as claimed in claim 1, wherein the rope is subjected to an intermediate rinsing after application of the first dyeing liquor, the rinsing liquor being applied in one or more stages in the manner recited in claim 9 for the first dyeing liquor.
A process as claimed in claim 1, wherein the dyed fibers or filaments are subjected to an aftertreatment, the aftertreatment liquor being applied in one or more stages in the manner recited in claim 9 for the first dyeing liquor.
A process as claimed in claim 13, wherein the synthetic fibers are polyester fibers.
Dependencies are inferred from the claim text.