Paint-indigo stereo overdyeing and fixation desizing-free sizing and dyeing process for jean blended warps

Abstract

The invention discloses a paint-indigo stereo overdyeing and fixation desizing-free sizing and dyeing process for jean blended warps. The process comprises the following steps: diluting self-crosslinking polyacrylate emulsion slurry containing color paste with water, carrying out uniform mixing with stirring, carrying out slurry groove dip-dyeing sizing and roller pad dyeing sizing on the jean blended warps so as to realize sizing and dyeing, drying the jean blended warps having undergone sizing and dyeing with a drying drum, then carrying out self-crosslinking and solidification, then further carrying out sizing coating and dye fixation on the jean blended warps by using self-crosslinking polyacrylate emulsion slurry not containing color paste, carrying out drying with the drying drum, self-crosslinking and solidification and then carrying out overdyeing with indigo; and further carrying out sizing coating and dye fixation on the jean blended warps having undergone overdyeing with indigo by using the self-crosslinking polyacrylate emulsion slurry not containing color paste again. According to the invention, pigment printing paste and indigo are respectively coated by a layer of a transparent self-crosslinking polyacrylate emulsion slurry membrane for dye fixation, so color fastness of two colors are substantially improved, new colored light hardly forms, and good stereoscopic sensation or layering sensation is obtained.

Description

technical field [0001] The invention relates to a desizing-free sizing and dyeing process, in particular to a denim blended warp yarn indigo three-dimensional color registration, color fixation and desizing-free sizing dyeing process; it belongs to the technical field of textile printing and dyeing. Background technique [0002] The processing of denim usually goes through processes such as warp dyeing, sizing, weaving, desizing, and finishing. The warp is mainly dyed with traditional indigo dyes, and sometimes some sulfur dyes or other vat dyes are also used. Indigo is a vat dye, and dyeing needs to go through processes such as dye reduction, leuco dyeing, and leuco oxidation. Because indigo dyes are usually insoluble in water and have low affinity for fibers, in an alkaline solution, the indigo must be reduced to a water-soluble leuco-sodium salt with a reducing agent. After the leuco body is dyed on the cotton fiber, it is oxidized and transformed into the original insol...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the existing indigo overdyeing and weaving process of denim blended warp yarns, the defects such as uneven dyeing, indigo fastness to be improved, weak three-dimensional or layered feeling between colors, and large pollution of desizing wastewater, etc., the present invention provides A denim blended warp coating based on self-crosslinking polyacrylate emulsion size and pigment-containing coating indigo three-dimensional color registration, color fixation and desizing-free sizing and dyeing process

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