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What is cationic dyeing? What are the advantages and disadvantages of cationic dyeing?

Views: 503     Author: Site Editor     Publish Time: 2021-03-08      Origin: Site


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What is cationic dyeing? Cationic dye is a relatively environmentally friendly and harmless dye in our lives, so many friends in life like to use it for dyeing. Next, I will show you how to dye with cationic dyes and what are the advantages and disadvantages of cationic dyeing!

1. Dyeing method that is not as good as retarder to control temperature

This method is different from the retarding agent, but by appropriately extending the heating time to achieve uniform coloring of acrylic fiber, the temperature must be strictly controlled during dyeing. This method is suitable for the dyeing of loose fibers and rope piece dyeing with relatively large baths, and the dyeing of wool and acrylic blended yarn. The dye in the dyeing bath is gradually absorbed as the temperature rises, which is convenient for over-dyeing acid dyes and cationic softeners in the same bath. Dyeing prescription can choose M-type or X-type cationic dyes with medium affinity, both of which can achieve uniformity. Because the temperature must be accurately controlled during the dyeing and leveling process, the production equipment should be automatically controlled by a temperature program.

Cationic dyes

2. Dyeing method with retarder

Utilizing the blocking effect of cationic retarder on the acidic groups on acrylic fiber, the added amount of retarder makes the acrylic fiber reach an appropriate degree of saturation, hinders the absorption of cationic dyes, and achieves evenness for dyes with fast coloring and poor migration. Dyeing effect. This dyeing method is suitable for all kinds of acrylic fiber products. The characteristics of cationic retarder should be compatible with the K value of the dye. Sodium sulfate has no retarding effect on dyes with small K value.

3. Dyeing method of adding retarder and controlling temperature at the same time

This is a relatively widely used and reliable acrylic dyeing process. According to different types of fibers, select appropriate retarders and control the temperature. The dyeing bath is 85-90 or 90-95 to absorb clean, which simultaneously shrinks the acrylic bulked yarn And dyeing is more ideal conditions.

Cationic dyes

4. Dyeing method with anionic additives

An appropriate amount of anionic diffusing agent N and leveling agent O in the dyeing bath can change the ionization state of cationic dyes and temporarily lose the charge attraction to acrylic fibers, or directly use disperse cationic dyes (KayacrylED). This method is beneficial for dyeing wool and acrylic blended products in the same bath with acid dyes, or for dyeing polyester and acrylic blended products in the same bath with disperse dyes.

5. Constant temperature fast dyeing method

Add cationic retarder in the dyeing bath, acrylic fiber will be dyed at 90, dye adsorption and diffusion can be completed in a short time at the same time, and the production cycle is shortened. The most ideal dyeing process is the highest possible dyeing temperature, faster heating and the shortest dyeing time. If the conditions are strictly met, it can be guaranteed.

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