What dyes are used for dyeing non-woven fabrics?

What kind of dyes are used for dyeing non-woven fabrics? Different types of non-woven fabrics often use different dyes. At present, the dyeing methods of non-woven fabrics mainly include reactive dyes, cationic dyes, disperse dyes and other methods. Note that the dyeing of non-woven fabrics During the process, every process of the dyeing process must be controlled, otherwise it may cause insufficient dye absorption and low fixation rate! 　　①Direct dyeing of cotton, linen, wool, silk and viscose (normal temperature dyeing) 　　 Features: the most chromatographic Complete, the lowest price, the worst fastness, and the simplest method. Among them, fabrics dyed directly with formaldehyde as an accelerator generally need to be reinforced with a colorant to stabilize the color fastness.　　②The reactive groups in reactive dyes are combined with the reactive groups in cotton, linen, silk, wool and viscose.　　Features: bright color, good levelness, good fastness, but expensive.　　③Disperse dye polyester special dye 　　The molecules of the dye are as small as possible and can penetrate into it. At the same time, high temperature and high pressure are used to promote the penetration of the dye. Therefore, the color fastness is high.　　④Cation dye 　　A special dye for acrylic fiber. Acrylic fiber is anion when spinning, and it can absorb the cation in the dye to color. 　　B polyester fiber can be dyed at room temperature with cationic dye. It is cationic dyeable polyester yarn.　　 What kind of dye is used for dyeing non-woven fabrics? According to its characteristics, non-woven fabrics require that non-woven fabric pigments must be bright and resistant to a certain temperature. Organic pigments for coloring non-woven fabrics must be bright and can withstand a certain temperature, but also require environmental protection, easy dispersion, migration resistance, low filtration value, and resistance to certain light when used in some specific applications. Among them, Pigment Red 254, Permanent Yellow 83, Phthalocyanine Green, Phthalocyanine Blue have particularly good temperature resistance and light resistance. Non-woven fabrics with higher requirements can choose this type of pigment. The dyes used in the processing of non-woven fabrics are usually textile dyes. Textile dyes are not only convenient to use, but also have good leveling properties. However, if the dyeing process conditions are not properly controlled, the non-woven fabric dyeing fixation rate will decrease and the non-woven fabric The dyeing cost is greatly increased. In contrast, vegetable dyeing dyes are not only non-toxic and safe, and non-woven fabrics will not produce a lot of chemical pollution during the dyeing process, which is also conducive to the protection of the environment! How many square meters are there in a kilogram of cloth?