How to dye nylon 6 fabrics with acidic dyes

In 1935, Dr. Carothers, American scientists and his team developed polyamide, commonly known as "nylon". Nylon has multiple varieties. At present, the most widely used polyamide is nylon 6,6 and nylon 6.

Nylon 6 is aggregated by the ingredients as a single raw material, and the nylon 66 is aggregated by arimine and hepic acid as a single raw material.

Today, Mansi Chemical is mainly based on the basic information of your Popular Nylon 6.

01 What is nylon 6

Nylon 6 is a type of polymer material containing characteristic structured amide bonds on the main chain of the macromolecular. Its dyeing performance is similar to wool. Has excellent use of strong strength, abrasion resistance and softness, and light texture, etc., occupying an important position in the fiber fiber. At the same time, the recovery rate of nylon fabrics is high, up to 4.5 % to 7 %.

It is comfortable and lighter, and the nylon fabric is lighter. The fiber and its blended fabrics make mountaineering clothes, sportswear, and swimsuit clothing and other clothing and clothing. Especially in recent years, the development of super fine fibers has greatly improved the grade of the raw materials itself.

Nylon 6 fabrics are generally dyed with decentralized dyes, acidic dyes and neutral dyes. For the dyeing of the nylon 6 fabric, acid dyes are combined with the nylon 6 -end amino group through a strong ion bond or static gravitational effect, which has a bright color with excellent coloring fastness, which has become the first choice for nylon 6 fabric dyes. We will start with the dyeing mechanism of acid dyes to study the process factors that affect the performance of nylon 6 fabric dyeing, improve the appearance of fabric dyeing and reduce the emergence of defective diseases.

02 dyeing mechanism

The dyeing mechanism of acid dyes is basically the same as wool dyeing. The carboxyl content of nylon 6 is higher than the amino-based content, and the pH value of the electric point of nylon is 5-6. When the electrical point is below the dyeing point, the dye is mainly fixed on the end amino group of the fiber, and the acidic dye is on the nylon 6 6 6 The saturation value of the upper is basically consistent with the content of the end aminel.

When the pH value drops below 2.5, the fibrous amide group begins to adsorb protons and generates an ultra -compact adsorption. Dyeing under the condition of low pH value will promote the degradation of nylon 6 fabrics. When a pH value of Nylon 6 is stained above more than a pH value of more than PH, the dye is adsorbed on the fiber by the gravitational gravity such as Van Dehua and hydrogen bonds. The upper dye of acid dyes to nylon 6 fiber is mainly due to dye anion and nylon 6 -acid ions. Nylon 6 fabrics are commonly used for dye dyeing, and the actual dyeing pH value is between 4-6.

03 How to choose

Acid dyes are required to be complete, excellent and often used. Among them, the sun exposure is basically above 3 to 4, and the soap washing, sweat stains, and friction fastness must be above level 4. The compatibility performance must be good, and no competitive dyeing is produced during color fighting. And there must be a certain coverage performance. The dyes selected by Manyi are basically in line with the above requirements. Basically, the nitrogen acid dye is the main.

04 method analysis

Nylon fabric dyeing can be dyed and rolled. In order to prevent wrinkles, the roll dyeing process is selected here. Select a rolled staining machine staining, the nylon fabric is stained with a rolling staining machine. During the operation, the equipment can maintain the constant tension, and it can maintain the constant line speed. Poor color difference, uniform color, no flawed diseases such as wrinkles, and high -dyeing. It is especially suitable for small batch dyeing, the cost is small, and the production conditions are not high.