In the dyeing work, the dyeing machine can run normally. When it works, it is affected by many factors. The specific influencing factors can include four factors.
In order to avoid this problem, we need to choose good cloth and good dye.
Second, temperature is also a very important influencing factor. If the temperature is high or low, it will affect its effect. When the temperature is raised, the temperature cannot be raised very fast.
Third, the dissolving problem of fuel should be ensured enough to be fully dissolved. Manual assistance can be provided when necessary, which has a good effect.
Fourth, there may be a lot of friction when dyeing. In order to avoid this problem, you can use a proper amount of lubricant.
1, the temperature
Temperature is the key factor of high temperature and pressure dyeing machine. Increasing the temperature can increase the dyeing of disperse dyes %. However, when the temperature is above 130 degrees, the dyeing percentage of most disperse dyes no longer increases significantly. High temperature will cause hydrolysis of polyester ester bonds, resulting in decreased elasticity and strength of the fiber, color difference, high temperature and high pressure dyeing is generally not more than 145 degrees. Generally, the dyeing temperature is controlled between 125 and 130 degrees. At this temperature, not only is the homogeneity good, but the color amount is high, and if the PH value of the dyeing bath is controlled within the weak acid range of 5-6, most disperse dyes are quite stable, so the color is very bright. In order to make the dye can be absorbed evenly by polyester, the heating rate must be controlled strictly. When the temperature rises to the specified temperature, the insulation should be dyed for a period of time to ensure that the dye fully diffuses. The incubation and dyeing time is generally 30-60 minutes. The light color can be shorter and the dark color can be longer. Once the dye is finished, the temperature should not cool too quickly, otherwise it will affect the feel and cause creases.
2, PH value,
Many disperse dyes will hydrolyze under the condition of high temperature and alkalinity. Therefore, high temperature and high pressure dyeing bath is better under the condition of controlling acidity.
3. Application of additives
In the high temperature and high pressure dyeing, in order to make the dye can be stably dispersed in the dyeing bath, and in order to obtain the effect of uniform dyeing, a proper amount of dispersant and uniform dyeing agent can be added in the dyeing bath.