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What is cationic dyeing? What are the advantages and disadvantages of cationic dyeing?
Release time:
2024-09-29
What is cationic dyeing? Cationic dyes are a relatively environmentally friendly and harmless type of dye in our current lives, so many people like to use them for dyeing. Next, the editor of Global Textile Network will take you to see how to dye with cationic dyes and the advantages and disadvantages of cationic dyeing!
What is cationic dyeing? Cationic dyes are a relatively environmentally friendly and harmless type of dye in our current lives, so many people like to use them for dyeing. Next, the editor of Global Textile Network will take you to see how to dye with cationic dyes and the advantages and disadvantages of cationic dyeing!
1. Unlike the dyeing method that controls the temperature with a retarder, this method uses a suitable extension of the heating time to achieve the purpose of uniform dyeing of acrylic fibers, and the temperature must be strictly controlled during dyeing. This method is suitable for dyeing of large-bath loose fibers and rope-like pieces, as well as wool-acrylic blended yarns. The dye in the dye bath is gradually absorbed as the temperature rises, which facilitates the overdyeing of acid dyes and the application of cationic softeners in the same bath for wool-acrylic blended products. The dyeing recipe can choose M-type or X-type cationic dyes with moderate affinity, both of which can achieve uniform dyeing effects. Because the dyeing process must precisely control the temperature, the production equipment should have automatic temperature program control.
2. Dyeing method with added retarder Using the blocking effect of cationic retarders on the acidic groups on acrylic fibers, the addition of retarders makes the acrylic fibers reach an appropriate saturation level, hindering the absorption of cationic dyes, and achieving uniform dyeing effects even for dyes with fast coloring and poor migration. This dyeing method is applicable to various acrylic products. The characteristics of the cationic retarder should be adapted to the K value of the dye. Sodium metasilicate has no retarding effect on dyes with a small K value.
3. Dyeing method with added retarder and temperature control This is a widely used and reliable acrylic dyeing process. According to the different fiber Models, appropriate retarders are selected and the temperature is controlled. The dye bath is absorbed at 85-90 or 90-95, which is an ideal condition for the simultaneous shrinkage and dyeing of acrylic bulked yarns.
4. Dyeing method with anionic auxiliaries An appropriate amount of anionic dispersing agent N and leveling agent O in the dye bath changes the ionization state of the cationic dye, temporarily losing the electrostatic attraction to acrylic fibers, or directly using disperse cationic dyes (Kayacryl ED). This method is conducive to dyeing wool-acrylic blended products in the same bath with acid dyes, or dyeing polyester-acrylic blended products in the same bath with disperse dyes.
5. Constant temperature rapid dyeing method Cationic retarder is added to the dye bath, acrylic fiber is dyed at 90℃, and dye adsorption and diffusion are completed simultaneously in a short time, shortening the production cycle. The most ideal dyeing process is to use the highest possible dyeing temperature, faster heating, and shortest dyeing time. If the conditions are strictly met, it can be guaranteed.
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