Dyeing and finishing process for suede fabric

Abstract

The invention discloses a dyeing and finishing process for a suede fabric. The dyeing and finishing process comprises the following steps of: desizing, refining, slackening, splitting, presetting, sueding, dyeing a gray fabric; and forming a finished product, wherein the gray fabric is dyed by adopting a supercritical fluid dyeing means in the dyeing step, the dyeing temperature is 90-115 DEG C, the dyeing pressure is 18-25MPa, and the dyeing time is 15-45min. According to the dyeing and finishing process disclosed by the invention, time, labor and energy sources are saved; the environment is protected; and the dyed and finished product has the characteristics of high dyeing firmness, dyeing penetration and isochromatic property.

Description

technical field [0001] The invention discloses a dyeing and finishing process, in particular to a dyeing and finishing process of a suede fabric with island-in-the-sea superfine fibers as the main raw material. Background technique [0002] Suede is a kind of high-grade suede natural leather made from animal suede skin through tanning, drying, sanding and dyeing. The quantity of natural suede is extremely limited due to the limitation of resources, output, price, laws, etc. People began to look for ways to use fabric as a substitute - the production method of artificial suede. At present, artificial suede fabric gray cloth is made by using sea-island type composite superfine fibers, and processed into a new generation of artificial suede through special finishing and dyeing techniques. The surface of the finished product is fine and dense, soft and smooth, and has a certain leather feel. It can be faked in appearance, and it surpasses real leather in terms of strength, ela...

AI Technical Summary

Problems solved by technology

(2) Poor level dyeing property: due to the low linear density and large specific surface area of ​​the fiber, the adsorption speed of the dye is fast, and it is easy to appear uneven

If the amount of alkali is reduced before dyeing and the pre-setting is uneven, it will lead to uneven dyeing

(3) Poor dyeability: the diameter of ultrafine fibers is small, and the diffuse reflection of light on the surface of the fabric is enhanced, so the color tone is correspondingly weakened

(4) Poor dyeing fastness: Due to the low linear density and high content of amorphous regions, dyes are easily migrated to the surface by heat; due to the large surface area and irregular cross-section, it is easy to be contaminated with dyes and difficult to clean, resulting in a decrease in rubbing fastness; The polymer content in microfiber is high, and it is easy to absorb dyes under hot and humid conditions, which reduces the wet fastness; also due to the low density and large surface area of ​​microfiber, light and gas can easily enter the fiber, so the light fastness is low

[0004] Due to the dyeing performance of island-in-the-sea microfibers, the dyeing effect of the suede made by conventional dyeing methods is poor

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