High-color-fastness polyester microfiber dyeing method

Abstract

The invention discloses a high-color-fastness polyester microfiber dyeing method. The high-color-fastness polyester microfiber dyeing method is characterized by comprising the following steps of: 1, preparing an ultrafine fiber non-woven fabric with a gram weight of 20 to 1,500g / m<2>; 2, carrying out pre-impregnation treatment on the ultrafine fiber non-woven fabric in the step S1, i.e., using modified PVA and CMC, regulating viscosity to 300 to 5,000 cp.s, regulating solid content to 5% to 40%, regulating impregnation pick-up to 30 to 300%, and drying at a temperature of 110 to 150 DEG C; 3,carrying out polyurethane impregnation treatment on a semi-finished product in the step S2, i.e., using impregnation; regulating viscosity to 300 to 30,000 cp.s, regulating solid content to 5% to 40%,regulating impregnation pick-up to 30 to 300%, and drying at a temperature of 90 to 160 DEG C; 4, carrying out dyeing finishing on the semi-finished product in the step S3, i.e., carrying out directdyeing on fibrils which are not opened by adopting a disperse dye, wherein a molecular particle size of the disperse dye is 0.3 to 10 mum; and 5, carrying out alkali decrement opening treatment on thesemi-finished product in the step S4. Polyester microfibers prepared by the high-color-fastness polyester microfiber dyeing method disclosed by the invention are high in color fastness and excellentin comprehensive performance.

Description

technical field [0001] The invention relates to the technical field of polyester superfiber suede, in particular to a polyester superfiber dyeing method with high color fastness. Background technique [0002] Microfiber leather is the product closest to natural leather for its three-dimensional space structure and hand feeling elasticity. As a substitute for genuine leather, it is becoming more and more popular in the market, especially the suede-like suede leather is the highest grade in the microfiber field. . But some properties fail to meet the application requirements, and there are few applications in high-end clothing fabrics and automotive interiors. [0003] Also there is following defect in the dyeing method of prior art: [0004] 1. The problem of color fastness. Because the fineness of ultra-fine fibers is relatively small, the fiber diameter is small and the specific surface area is large, the amount of dye adsorption on the fiber surface is also greatly incre...

AI Technical Summary

Problems solved by technology

[0004] 1. The problem of color fastness. Because the fineness of ultra-fine fibers is relatively small, the fiber diameter is small and the specific surface area is large, the amount of dye adsorption on the fiber surface is also greatly increased, and the dye fastness of the adsorption is relatively poor. When the dye is used, the dye will fall off or migrate, and the final performance is poor color fastness;

[0005] 2. It is difficult to color the inner layer, and the surface of PET is easy to absorb dye floating color, and the color fastness is poor

[0006] 3. The superfiber produced by the prior art adopts 16-island and 37-island fixed-island nylon superfine fibers (PA6 / COPET) of 1dtex to 6.5dtex and 16 and 37-island fixed-island polyester superfine fibers (PET / COPET) impregnated with polyurethane warp After alkali reduction or toluene fiber opening, dyeing with acid dyes or disperse dyes, and then finishing treatment to process finished products, its color fastness such as dry and wet wiping, color migration, and sunlight can hardly reach level 4 and above at the same time. Above (level 5)

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