HT Fine Textile Chemical Auxiliary Agent

The forms of defect When the colored spot mark which is the same color of dyeing textile, that is to say color patch, appearing on the dyeing textile with the form as similar in shape or size basically, or irregular in shape or size which is not definite. This kind of defect is hard to repair once producing, which has a great effect on the quality of dyed products, so it should be paid much attention.  The causes The causes leading to color defect can be concluded 3 aspects as following on the whole: (1) The condensation of dyes The appearance of aggregation of larger dyes (or dyes associations) dues to the direct collision of dye molecules. These aggregations of larger dyes are deposited on the fabric during dyeing, resulting in stain defects. The dyeing time: a) The free dye molecules will be re—crystallizing during the heating (or cooling) process to form new grains; b) The dye molecules that have been dissociated will gradually adsorb on the crystal surface of the original dyes...

High-temperature and high-pressure dyeing is the main dyeing method adopted by Dacron fiber. Owing to these characteristics of Dacron, its put forward special requirement for the  leveling agent . And the difference of semi-finished Dacron fabric on the types put forward a new requirement for the  high-temperature leveling agent . So besides the basic conditions, 130℃ is provided in the process of retarding and migration, some special conditions also need to be provided to semi-finished Dacron fabric. Or the special application requirement to high temperature and high-pressure dyeing will not be met. The basic function of high temperature and high-pressure leveling agent. Hydrophobic disperse dyes is applied in the Dacron fiber dyeing. But its hydrophobic property makes its difficult to dissolve in the water, which is a contradictory thing in the dyeing process in which, the water is the medium. So the dispersing agent and other surfactant is mixed in the dispersing dyeing ...