The importance of temperature control in high temperature dyeing machines
Nov 19, 2022
When using a high temperature dyeing machine, it is the temperature that matters. Properly increasing the temperature will effectively improve the dyeing rate, but if the temperature of the dyeing machine exceeds 130 ℃, it will lead to the increase of disperse dyes and the dyeing rate will change significantly. will exceed 145°C.
When dyeing with a high-temperature dyeing machine, the heating rate should be correctly controlled. The actual heating rate should be reasonably set according to the levelness, dyeing depth, dye liquor circulation state and different dyeing stages of the dyes used. Usually the heating rate is 1~2°C/min.
When the dyeing temperature is below 85 ℃, the dye is rarely dyed, and it can be directly heated. 85°C-110°C is the temperature area where the dyeing speed increases rapidly, and the heating speed needs to be strictly controlled below 1.5/min. It can be slightly faster in the range of 115°C-130°C, but the heating rate needs to be controlled at about 2°C/min. The holding time here is for medium-depth colors. Light colors can be appropriately shortened, dark colors can be appropriately extended, and the holding time should be appropriate. Too short will cause ring dyeing, and too long will easily produce wool. Generally, it should be controlled within 30-60min.
In addition, after the high-temperature dyeing machine is finished dyeing, the temperature should not be cooled too fast, otherwise there will be bad creases, or the effect of the entire feel will be affected.