Technique for dyeing and finishing flax and Lyocell fiber mixed fabrics

Abstract

The invention relates to a dyeing and finishing process used for a fabric blended by flax and Lyocell fiber, belonging to the textile technique field and aiming at providing an improved blended fabric dyeing and finishing process. The technical proposal of the process is that: after singeing and before desizing-boiling-off, bio-enzymes agent is adopted for cold-dome treatment; low-alkali boiling-off and a hydrogen peroxide bleaching one-step method are adopted; before dyeing, a polybasic carboxylic acid cross-linker EH is adopted to carry out an anti-fibrillation treatment to the Lyocell fiber; after dyeing, a cellulose is adopted to carry out flexibility treatment to the flax fiber; nano-finishing agent is adopted to carry out a four-proofing finishing. The dyeing process not only can preserve the original characteristics of flax fabric but also has better four-proofing capability, low-loss of strength, high dyefastness and functions of ventilation and proper process. After detection, various chemical indexes of the product can meet the requirement of Oeko-Tex100 and the process has the advantages that the operation is easy and process can be easily controlled, etc.

Description

Technical field [0001] The invention relates to a dyeing and finishing process of flax and Lyocell fiber blended fabric, belonging to the technical field of textiles. Background technique [0002] Flax and Lyocell fiber are both cellulose fibers. Lyocell fiber is a kind of regenerated cellulose fiber that is pulped from wood and sprayed out in a certain shape. It is breathable, stiff, easy to absorb moisture, and antibacterial and antibacterial. Performance, so it is a high-end textile material, and its fabric is high-end clothing and decorative cloth. However, the rebound rate of flax at break is small, about 2% to 4%, the elastic stability is poor, the skin-friendly property is poor, and the rigidity is strong, and the wearing performance is restricted to a certain extent. In addition to the characteristics of natural fibers, Lyocell fiber also has good moisture absorption, comfort, gloss, dyeability and biodegradability, and also has strong elongation characteristics; in texti...

AI Technical Summary

Problems solved by technology

However, for a long time, in the dyeing and finishing process of flax and Lyocell fiber blended fabrics, there have been four major technical problems that have restricted the popularization and application of linen fabrics: one is in the traditional process, in order to achieve the purpose of bleaching and removing impurities, often Use the method of alkali annealing + oxygen bleaching + chlorine bleaching, but the excessive chemical reaction is difficult to ensure that the fiber will not be damaged, because Lyocell cellulose fiber is extremely poor in alkali resistance, and a large amount of caustic soda will cause the fiber to dissolve

And in the whole process, a large amount of water is required to clean the caustic soda remaining on the fabric, correspondingly producing a large amount of alkaline waste water, which has a great impact on the environment; the second is that due to its inherent characteristics of Lyocell cellulose fiber, it is difficult to process in the dyeing and finishing process. During the process, through the friction of the equipment, the cohesion of the fibers is reduced, resulting in heresies, and short hairs are formed on the surface

Pilling can occur like wool during wearing, and the cloth surface is not smooth, which affects the appearance of clothing

Moreover, the coloring rate of Lyocell fiber and flax is very different. When dyeing, the coloring of the two fibers is inconsistent, resulting in uneven color of the cloth surface, often appearing on the cloth surface, and the color is dark. The third is that Lyocell fiber is very easy to process during processing. The problem of fibrillation occurs, which makes the formation of long and uneven fibril hairs, poor anti-pilling performance, and rough appearance; the fourth is the conventional four-proof finishing agent such as Qiba’s Teflon finishing, etc., after finishing The fabric feels rough and hard, has poor air permeability, loses a lot of strength, and is difficult to control color change