Aramid fiber antibacterial dyeing one-bath treatment method

Abstract

The invention provides an aramid fiber antibacterial dyeing one-bath treatment method. The method comprises the following steps of S1, sequentially adding a carrier and sodium sulfate into a cationic dye to obtain a mixed solution; S2, adding silver nitrate into the mixed solution prepared in the step S1, adjusting the pH value to 3-5 after uniform stirring, and obtaining a dye liquor; and S3, putting an aramid fabric and the dye liquor obtained in the step S2 into a dyeing cup, putting the dyeing cup into a high-temperature dyeing machine, raising the temperature to 60-100 DEG C, keeping the temperature for 20-50 minutes until the carrier and the fabric act uniformly, after heat preservation is finished, increasing the temperature to 120-140 DEG C at the speed of 2 DEG C/min, dyeing for 50-80 min, and after dyeing is finished, cooling to 40 DEG C, soaping and drying. According to the method, aramid fiber is dyed by using the cationic dye, and the dye has positive charges, so that the dye mainly exists in a dye bath in an ionic form, but the main combination mode between the dye and the fiber is not an ionic bond, but hydrogen bonds, Van der Waals' force and the like, and the dyeing effect is obvious. Meanwhile, the dyed aramid fiber has good color fastness to rubbing, soaping fastness and better color fastness to sunlight.

Description

technical field [0001] The invention belongs to the field of textile dyeing and finishing, and in particular relates to a one-bath treatment method for antibacterial dyeing of aramid fiber, which enables the aramid fiber to have an antibacterial effect while being dyed. Background technique [0002] Aramid is a new type of high-tech synthetic fiber with excellent properties such as ultra-high strength, high modulus, high temperature resistance, acid and alkali resistance, light weight, insulation, anti-aging, and long life cycle. It is widely used in composite materials and bulletproof products. , building materials, special protective clothing, electronic equipment and other fields, often used in the manufacture of ropes, ribbons, weaving, reinforced cables and optical cables, cables for ships, and packing for sealing and other products. The aramid structure has two layers of skin and core. The high strength and high modulus of aramid fiber is mainly determined by the inner...

AI Technical Summary

Problems solved by technology

The aramid structure has two layers of skin and core. The high strength and high modulus of aramid fiber is mainly determined by the inner high crystallization core layer. In the application process, especially in some humid or outdoor exposure application environments, aramid fiber It is easy to mold in the material, and when a large amount of mold gathers, it will cause damage to the aramid fiber filament, thereby reducing the quality of the product it is applied to

[0003] Therefore, when people produce aramid fibers, they need to be treated with mildew and antibacterial treatment. In the traditional treatment method, one is to add antibacterial agents during the spinning process of aramid fibers, so that the antibacterial agents can be integrated into the aramid fibers. The process of the method is relatively complicated and the cost is high. At the same time, because the antibacterial agent exists inside the aramid fiber, it will destroy the regularity of the molecules, affect the crystallization of the aramid fiber, and greatly reduce the tensile strength of the aramid fiber; The first is to graft antibacterial agents on the surface of aramid fibers through chemical reactions, but this method requires a long processing time and high cost. Multi-active groups, when the antibacterial agent is grafted onto the aramid fiber, this reaction process will have a great impact on the performance of the aramid fiber, and also greatly reduce the tensile strength of the aramid fiber

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