Catalum dye is a dye for polypropylene fibrous dyeing, which can also be used for dyeing of modified polyester (CDP). Today, share the basic knowledge of cationic dye.
1. Overview of decentralized dyes
Catalum dye is the earliest synthetic dye. In 1856, the aniline purple synthesized by W.H.Perkin in the United States and the subsequent crystalline purple and malachite green were all cationic dyes. These dyes were previously known as salt -based dyes. They can dye protein fiber and have tannin acid and spit lonely cellulose fiber. They have gorgeous colors, but they are not tolerated. Replace with acidic dyes.
After the industrialization of acrylicization in the 1950s, people found that on polypropylene fiber, cationic dyes not only had high direct and strong colors, but also the dyeing accuracy was much higher than the protein fiber and cellulose fiber, so it was re -re -reinstated. Aroused people's interest. In order to further adapt to the application of acrylic and other synthetic fibers, many new varieties have been synthesized, such as the Duojiachuan structure, nitrogen generation polygawa structure, and pillaramide structure, etc. A major dye of fibrous dyeing.
The cedic dye is generated in the solution with positive charges, and the acid root anion such as chloride, acetate root, phosphate, and methacoposolic acid root is dyed on the polyacryonal fiber. In actual dyeing, several cure dyes are commonly used to fight into a specific color. However, mixed and dyeing dyes in cation are often not easy to dye the same color light, resulting in flower spots and layers. Therefore, in the production of cedic dyes, in addition to expanding the variety and quantity, we must also pay attention to the supporting facilities of the dye varieties; in order to prevent dyeing flowers, pay attention to developing well -dyed varieties. In addition And the sunshine accuracy and so on.
2. Classification of cationic dyes
The group with a positive charge in the cationic dye molecule is connected to the co -murmur system in a certain way, and then forms salt with the anion group. According to the position of the band ionic group in the co -puppet system, cationic dyes can be divided into two categories: isolation and co -pyrum -type types.
1. Isolation cationic dye
The isolation cationic dye -dye -dyeing mother and the group with a positive charge are connected by the isolation base. The positive charge is a fixed domain, and the molecular end of the decentralized dye is introduced to the daily ammonium group. The following formula is represented:
Because the positive charge is concentrated, it is easy to combine with the fiber. The percentage rate and upper dye rate of the upper dyeing are relatively high, but the uniform dyeing is not good. Generally, the color light is dark, the Moore has low inhalation, and the color light is not strong enough, but the heat resistance and sun resistance are excellent, and the fastness is very high. It is often used in dyeing and light color. Typical varieties are:
2. Corporal dye dye
The positive charged group of the common cationic dye dye is directly connected to the dye co -system system, and the positive charge is lying in the domain. The color of this type of dye is very gorgeous, with high light inhalation, but some varieties have poor light resistance and heat resistance. Among the types of use, the common type accounts for more than 90%. There are many varieties of common cationic dyes, mainly in triple methane, vicious azine, and pole of pole.
Third, new cationic dye
1. Migration cationic dye
The so -called migrant cation dye refers to a dye that is relatively simple, the molecular weight and molecular volume, and the good dye of diffusion and uniform dyeing performance has now become a major category in cation dyes. The advantages are as follows:
It has good migration and uniformity, has no selectivity to acrylic, can be applied to different brands of acrylic fibers, and can better solve the uniform problem of acrylic dyeing.
The amount of slow dyeing agent is small (from the original 2 to 3%to 0.1 to 0.5%), and the dye monochrome can even be not added to the dye, so use can reduce the cost of dyeing.
It can simplify the dyeing process and greatly shorten the dyeing time from (the original 45-90 minutes to 10-25 minutes).