Dyeing process operation points of the jet dyeing machine
Jan 18, 2019

When dyeing, cover the lid of the jet dyeing machine before heating, and pay attention to the operation of the fabric in the machine,  check whether there are abnormal sounds in all parts of the machine. At 50 to 60 ° C, the disperse dye is dyed very slowly or substantially without dyeing. When the temperature is above 80 °C, the dyeing speed is increased. Therefore, the temperature should not be risen too fast between 80 and 130 °C.


Gradual heating and grading insulation are usually used in the operation to control the heating rate of the machine. The cooling rate should not be too fast, so as to avoid the formation of wrinkles and chicken paw prints. Therefore, the cooling rate of the jet dyeing machine must be strictly controlled. Generally, the heating rate is based on the principle that the temperature of the fabric changes by no more than 1 to 1.5 ° C per one revolution of the fabric. Generally, the dye bath should be from 1:8 to 1:20 depending on the model and structure of the equipment.


In addition, in the operation of the jet dyeing machine, the basic control principle for the pressure is: when the fabric is on the machine, the nozzle pressure can be larger, when the operation is normal, the nozzle pressure can be smaller; the thickness or weight of the fabric is larger, the nozzle pressure is larger, the nozzle diameter should be larger too.The ratio of the diameter of the rope fabric to the diameter of the nozzle is generally 9:10. When cooling down, it is strictly forbidden to inject cold water into the machine at high temperature to forcibly cool

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