Multi-step process for dyeing textile materials with a concentrated dye system

Abstract

The present invention relates to a process for dyeing sheetlike textile materials with a concentrated dye, which comprises a concentrated dye system being applied in a total amount of 1% to 25% by weight, based on the textile material, to the textile material in two or more sub-steps and the dye being fixed on the textile material after each and every sub-step.

Description

(1) Technical field [0001] The invention relates to the technical field of dyeing of textile materials. (2) Background technology [0002] A large part of the impact caused by the textile industry is attributable to today's dyeing and finishing processes, which consume large amounts of water and textile auxiliaries. All further optimizations of existing methods that can be hoped for appear to be, at best, marginal improvements relative to the minimization of environmental impact. [0003] The dyeing of denim items with indigo is of particular interest in this context, since this field usually employs large-scale industrial dyeing series, which have a large volume and therefore also a high water demand and wastewater impact. [0004] The prior art involves a continuous exhaust dyeing process to piece together pieces of (warp) threads (as required in weaving) or ropes (combining 300 to 400 pieces of warp in one rope) Yarn) individual threads are dyed. In this continuous exh...

AI Technical Summary

Problems solved by technology

[0006] Furthermore, the low fastness levels achieved by existing methods of dyeing denim with indigo are a nuisance for both industry and consumers, especially in relation to dry and wet rubbing fastness

[0007] Finally, the mentioned methods are technically demanding in that multiple interactively interacting parameters have to be captured and monitored at great cost and are inconvenient in terms of the required measurement and control technology

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