The dyeing performance of dyes in HTHP Fabric Dyeing Machine is related to their adsorption properties during the operation. Dyes with good transfer dyeability are easily desorbed. Therefore, if the post-treatment is not carried out, the washing fastness of the dye with high transfer performance is relatively low. The two are contradictory. The diffusion rate of high temperature and high pressure dyeing materials. In most cases, increasing the temperature also reduces the percentage of equilibrium dyeing. Therefore, in order to improve the transfer effect, the dyeing temperature may be increased. For example, from the original 90 ° C to 120 ° C, after a period of transfer, and then gradually reduce the temperature to increase the dye.
High-temperature and high-pressure fabric dyeing machines can alleviate uneven dyeing to different extents through transfer dyeing, but it is more important to try to control the dyeing rate. Through the flow of dyeing liquid, the fibers in different parts of the textile fabric are basically the same. In the case of uniform dyeing, thereby preventing or reducing the occurrence of uneven dyeing.
The dyeing rate varies with the nature of the fiber and dye, and varies with the dyeing process conditions. The dyeing process conditions include dye liquor concentration, temperature, dye liquor flow rate and other dye bath conditions, high temperature and high pressure dyeing machines such as bath ratio, dye pH, salt and other additives.
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