Dyeing method for improving deep dyeing performance of polyamide fiber

Abstract

The invention relates to a dyeing method for improving deep dyeing performance of polyamide fiber, and belongs to the technical field of textile printing and dyeing. The dyeing method comprises the following steps: adding disperse dye into a mixed solution of ethanol and water to obtain a dyeing solution, and dyeing the polyamide fiber in an ultrasonic environment, wherein by virtue of strong penetration of ethanol into the polyamide fiber, a synergistic effect is produced under the auxiliary action of ultrasonic, and a large number of dye molecules are carried into the free volume of the fiber so as to deeply and thoroughly dye the polyamide fiber. By the dyeing method, the dyeing temperature is low, the dyeing time is short, strength damage of the polyamide fiber in the dyeing process is alleviated, and the problem that the dyeing depth is not high when the disperse dye dyes the polyamide fiber is effectively solved; and the dyeing method is simple in process and strong in operability and is an efficient polyamide fiber dyeing method.

Description

technical field [0001] The invention relates to a dyeing method for improving the dyeing performance of nylon fibers, which belongs to the technical field of textile printing and dyeing processing. Background technique [0002] Nylon fiber belongs to the category of polyamide fiber. The trade name is nylon. It has the characteristics of high strength and high elasticity. It is mainly used as the main raw material of elastic fabrics in the market, such as manufacturing swimwear, stockings, underwear and other textile products. Nylon fibers include polycaprolactam and polyhexamethylene adipamide, namely nylon 6 and nylon 66. Nylon fiber contains a large number of polar amino groups. Under certain conditions, it can be dyed with acid dyes, disperse dyes and other dyes. Nylon fibers dyed with acid dyes are bright in color, high in exhaustion rate, and easy to achieve the designed color. [0003] When nylon fiber is dyed with acid dyes, the pH value of the dyeing environment is...

AI Technical Summary

Problems solved by technology

Dyeing nylon fiber under high temperature and acidic conditions for a long time will cause certain damage to the strength of nylon fiber, thus affecting the application performance of nylon fiber

[0004] Nylon fibers can also be dyed with disperse dyes. The dyeing pH is generally in a weakly acidic environment, but the dyeing temperature is as high as 85-95°C, and the dyeing time is as long as 40-60 minutes. Under such dyeing conditions, it will Nylon fibers cause a certain degree of damage

If the dyeing temperature is lowered or the dyeing time is shortened during dyeing, although it is helpful to protect the physical and mechanical properties of the fiber, there are still few dyes on the dye, the lifting power of the dye is not strong, and the dyeing depth is not enough, so it can only be used for dyeing medium and light colors. , and problems such as the color of the dye is not bright enough

[0005] Ultrasonic wave is a kind of mechanical wave, which has the characteristics of good directionality and strong penetrating ability. It has many uses in gravel, cleaning, welding, etc., but ultrasonic treatment is applied in textile printing and dyeing processing to improve the dyeing depth of nylon fiber has not received widespread attention

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