During the dyeing process, the fabric in the dyeing chamber is pulled by the winch and then enters the nozzle of the high temperature high pressure soft flow dyeing machine. Since the nozzle here is an annular outlet, the dye liquor is ejected from the gap of the nozzle. By the pressure of the nozzle, the dyeing liquid is sprayed to increase the number of cycles of the fabric, that is, the number of times is increased, and the temperature and dye distribution in the dyeing machine are uniform. To the extent that the number of times the dye is in contact with the fabric is increased, the dyeing time is shortened.
At the same time as increasing the speed of the fabric and increasing the number of dyeing cycles, it should be noted that the high temperature and high pressure soft flow dyeing machine has a mutual cooperation between the winch speed and the nozzle pressure. Since the bath ratio not only affects the color of the fabric, but also affects the normal operation of the fabric in the dyeing machine, it is necessary to control the bath ratio of the high temperature and high pressure soft flow dyeing machine.
The main factors affecting the dyeing quality of high temperature and high pressure soft flow dyeing machine are dye and addition mode, dyeing temperature, type and amount of salt and alkali agent, addition mode, dyeing time, dye bath ratio. Among the above influencing factors, except for the way of adding dyes, salts and alkali agents and the bath ratio, the other factors only affect the shade of the fabric, that is, the factors affecting the fixing rate of the reactive dyes.
After the dyeing of the high temperature and high pressure soft flow dyeing machine is completed, the temperature should be slowly lowered. When the temperature is lowered to 100 °C, the method of rapid cooling can be adopted. When the temperature is lowered to 80 °C, the overflow cleaning is performed to further reduce the temperature in the dyeing chamber.