Indigo dyeing processing method for cloth fabrics

Abstract

The invention relates to an indigo dyeing processing method for cloth fabrics. The method comprises the following steps: firstly, preparing a staining fluid with an indigo reductive-state leuco body property; preparing nitrogen or other inertial gases; introducing the staining fluid or the inertial gas nitrogen to a closed space for stirring and mixing to form staining fluid foams; then applying the staining fluid foams on the cloth fabrics by means of a closed scraper, an opened scraper or a rolling roller, wherein the staining fluid permeates through fibers of the cloth fabrics through the staining fluid foams, and squeezing out ambient air under the foam breaking pressure of air bubbles; carrying out oxidizing and developing treatment on the cloth fabrics dyed by the staining fluid; then, repeatedly and circularly carrying out dyeing treatment and oxidizing and developing treatment to enable the dyeing concentration to be increased; finally, continuously washing by water and drying to prepare an indigo dyeing cloth finished product. As a small amount of the staining fluid of a staining fluid foam carrier is absorbed by the fibers and the permeation of the staining fluid is relatively good, the method is extremely applicable to use in volume production of indigo dyeing of the cloth fabrics.

Description

technical field [0001] The invention relates to a processing method for indigo dyeing of cloth fabrics, especially a kind of dyeing solution that uses inert gas nitrogen and reduced indigo dye aqueous solution as a gas / liquid mixture to form a foamy dyeing solution carrier, so as to coat the yarn fiber surface of the cloth fabric The above processing methods are scrap printing, coating or pad dyeing. Background technique [0002] Indigo dyeing is different from other dyes because the dye is sensitive to reduction, oxidation and fiber dyeing conditions. Therefore, early indigo dyes were only used in large quantities after yarn dyeing to make colored cloth, and were used in process dyed fabrics. [0003] The current yarn count dyeing or process dyeing all use the reduced indigo dyeing solution as the method of immersion → dehydration → oxidation color development, and the dyed object is dyed and oxidized in the dyeing solution bath. However, during the dyeing process, the ai...

AI Technical Summary

Problems solved by technology

However, during the dyeing process, the air around the fiber will oxidize the dyeing solution, resulting in too many invalid oxidized chromophores and affecting the fastness of the dyeing.

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