Technical advantages of HT Jigger Dyeing Machine disperse dyes

Take care to avoid the migration of dyes during pre-baking and baking. The hot melt baking stage is an important stage for the disperse dyes on cotton to transfer to polyester. The appropriate choice should be made according to the heat resistance function of the dye, that is, the fastness of the dye. Melting temperature and time. In the practice of dyeing, the transfer of dyes cannot be complete. There will always be a part of the dye remaining on the cotton to form the staining of the cotton. Post-dyeing treatment can be carried out by restoring washing or soaping. If the cotton part is to be over-dyed after the hot-melt dyeing, the post-treatment can be selected after the over-dyeing.

High-temperature and high-pressure dyeing of disperse dyes can be carried out on high-temperature and high-pressure jig dyeing machines and jet and overflow dyeing machines. It is suitable for dyeing deep and thick colors. The dyeing pH value is generally controlled at 5 to 6, and acetic acid and ammonium dihydrogen phosphate are commonly used to adjust the pH value. . In order to keep the dyeing bath stable, a dispersant and a high-temperature leveling agent are required during dyeing.

Commonly used carriers are o-phenylphenol, biphenyl, methyl salicylate, etc., because most of them are toxic and harmful to the human body, so they are rarely used at present