Dedicated dye for dyeing blend fabric and mixed fabric

Abstract

The present invention relates to a kind of special dyestuff applied in mixing fabric and interweaving fabric dyeing, mixed by anion dyestuff, cation dyestuff and surface active agent. The weight proportion of anion and cation dyestuff is 5 - 95 : 5 - 95, the surface active agent is 1% - 200% of the sum of anion and cation dyestuff; the anion dyestuff is selected from acid dyestuff, weak acid dyestuff, neutral dyestuff, active dyestuff or direct dyestuff; the cation dyestuff is selected from cation dye or alkali dyestuff; the surface active agent is selected from fatty mellow polyethyleneoxide ether, alkyl mellow polyethyleneoxide sulfuric ester from the esterification reaction of average add and strong sulfuric acid, the methylene double sodium naphthalenesulfonate added levelling agent O or alkyl phenol polyethyleneoxide ether OP-10. The dyestuff can effectively prevent the interaction of different dyestuff components to form compound or such phenomenon as sedimentation, which can make mixing spinning and interweaving fabrics whose dyeing technologic conditions mutually conflicts as fur / nitrile and cotton / nitrile realize the dyeing technics of One Bath One Step method.

Description

technical field [0001] The invention relates to a special dye suitable for dyeing fabrics blended or interwoven with two (or more) different fibers. Background technique [0002] Dyeing products can be divided into three categories: pure spinning, blending and interlacing according to their fiber composition. Different fibers in blending and interweaving products can be dyed in the same color or in different colors, or only one of the fiber groups can be dyed. Points, get two-color or flash-color products. There are generally two methods for dyeing blended and interwoven products: one is to dye different fibers separately for loose fibers (or fiber strips) before spinning, and then carry out blending and interweaving of colored fibers. This method does not need to consider dyes and dyeing conditions. Mutual influence, but the production process is complex; another method is to dye blended or interwoven fabrics, which has less impact on the weaving process and has a faster t...

AI Technical Summary

Problems solved by technology

If the one-bath method is used for dyeing, the anionic dyes and cationic dyes in the dyeing solution will interact and form complexes. In severe cases, precipitation will occur, resulting in dyeing defects such as color flowers and color spots. effect can also lead to poor reproducibility of staining

For cotton / acrylic blended and interwoven fabrics, the direct dyes or reactive dyes used for cotton dyeing and the cationic dyes used for acrylic fiber dyeing not only have the same problem of different charge properties, but also when the reactive dyes are fixed with alkali, the cationic dyes are still very weak. It is easy to decompose and affect the dyeing; therefore, the two cannot be dyed in the same bath, but have to use the two-bath dyeing process, that is, the two dyes are dyed on two fibers step by step.

However, the two-bath method is cumbersome, the dyeing cycle is long, the production efficiency is low, and the energy consumption is high. Therefore, the realization of one-bath dyeing of blended and interwoven fabrics has been the goal pursued by dye manufacturers and the printing and dyeing industry for many years.