Method for dyeing yarn containing cellulose fiber by reactive dye

Abstract

The invention relates to a method for dyeing a yarn containing cellulose fiber by reactive dye. In the method, the following processes are carried out on the yarn which is warped into a beam by a continuous pad dyeing mode: padding with cationic modified solution, drying, padding with staining solution, drying, baking, washing and drying, wherein, a drying cylinder is adopted in the baking process for baking in a contact manner, and the yarn is directly contacted with a high-temperature outer wall of the drying cylinder. By means of the method, continuous pad dyeing of the yarn containing cellulose fiber can be carried out by the reactive dye; the dyeing process has the advantages of relatively low baking temperature, simple baking mode and less broken yarns which are easily handled by an operator; and the adopted dye has the advantages of being free from restriction of K-type reactive dye, comprehensive color spectrum, wide selection range, simple auxiliaries without salt, urea and the like, less dye hydrolysis consumption, low wastewater chromaticity and stable dyeing quality, and deep, medium and light color can be dyed.

Description

technical field [0001] The invention relates to the field of textile printing and dyeing, in particular to the dyeing and finishing treatment of colored yarns used in fabrics such as knitting, yarn-dyed weaving and denim. Background technique [0002] The dyeing of colored yarns containing cellulose fiber components used in knitted, yarn-dyed, denim and other fabrics, such as the dyeing of colored yarns containing cotton and viscose, usually uses hank dyeing, cheese dyeing, beam dyeing, pulping Combined dyeing machine dyeing and other dyeing techniques. Because these dyeing techniques have obvious shortcomings such as large water consumption, high energy consumption, and heavy sewage discharge, the continuous pad dyeing technology of cellulose fiber-containing yarn with low water consumption and high production efficiency has been focused on research in the printing and dyeing industry. [0003] The invention patent "A Production Method of Paint Dyeing Colored Fabric" (Pate...

AI Technical Summary

Problems solved by technology

In the application of this technology, the coating cannot effectively penetrate into the yarn fiber, resulting in obvious technical and quality problems: First, the color fastness is poor, especially the rubbing fastness, which can only be produced for garment polishing and washing Second, the dyeing core penetration is poor; third, the dyeing rate is low, it is difficult to dye dark colors, the quality is unstable, and the adhesive roll is seriously stained

Reactive dyes currently mainly use exhaust dyeing methods that are completely different from continuous pad dyeing in yarn dyeing, such as skein dyeing, cheese dyeing, warp beam dyeing, etc., while reactive dyes on fabrics are mainly dyed by continuous pad dyeing. However, the continuous pad dyeing method of reactive dyes for fabric dyeing mainly includes two processes, one is the baking and fixing method, which is mainly suitable for dyeing light colors with K-type dyes, and is not suitable for other types of reactive dyes. The dark color is produced, and the baking temperature is required to be above 170°C, which severely limits the application of this color-fixing method in the continuous pad dyeing of cellulose fiber-containing yarn; After padding the dyeing solution, then immerse in the fixing solution and steam to fix the color. This method itself has problems such as more hydrolysis of the dye and high chroma of the wastewater. If it is used for yarn fixing, special yarn steaming is required. box, and there are problems such as yarn breakage in the steaming box that is difficult to deal with

Therefore, active dyes are applied to the continuous pad dyeing of cellulose fiber yarn, and there is still a lack of effective process methods at present.

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