Process for the continuous dyeing of cellulose fibers or mixtures thereof with synthetic fibers with water-in-soluble azo dyestuffs developing 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 an overflow system or a combination of an overflow system and a preceding or following Venturi tube 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.
Claims16
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 being applied by passing the rope through an overflow system comprising a substantially vertical conduit which is surrounded by a bath of the dyeing liquor, which bath is filled so that liquor overflows into the conduit, such that the overflowing liquor around the rope in the conduit has an opening effect on the rope.
Dependencies are inferred from the claim text.