Precautions for high temperature dyeing machine

1. Preparation of the dye liquor When preparing the dye liquor, the dye should be made into a paste with a small amount of cold water first, and then diluted with room temperature water. Note that the temperature of the diluted water should not be too high, higher than 60 degrees, and the disperse dyed quilt will be damaged. For coagulation, in addition to the above modulation, the dye can also be modulated by the dusting method, that is, the dye is gradually sprinkled into cold water under high-speed mixing, and the dye bath should not be left for a long time after preparation. It needs to be gradually mixed with a mixer to avoid sedimentation.

2. Selection of dyestuffs When dyeing, try to choose the kinds with good diffusivity and levelness, and choose dyes with similar dyeing performance when combining colors.

3. Reduction cleaning Reduction cleaning is an important part of removing floating color. After washing by reduction, the color is slightly lighter. At the same time, the rubbing fastness and the light fastness were improved.

4, the avoidance of tar spots The so-called tar spots are viscous substances formed in the dye liquor, and the main components are dye dispersants and polyester oligomers. When polyester oligomer is polyester polycondensation, it will ooze out from the fiber and flow into the dye liquor and adhere to the surface of the fiber during the high temperature and long-term dyeing process.

The measures to avoid tar spots are: 1. Strengthen the pretreatment of fabrics. 2. Improve the dyeing bath ratio. 3. Apply high temperature and high pressure dispersant. 4. Use high temperature drainage to avoid crystallization of dye after cooling. 5. Shorten the equipment cleaning cycle. When preparing the dye solution, the dye should be made into a slurry with a small amount of cold water first, and then diluted with room temperature water. Note that the temperature of the diluted water should not be too high, higher than 60 degrees, the dispersion dyeing quilt will be damaged and coagulated. In addition to the above preparation, the dye can also be prepared by the dusting method, that is, the dye is gradually sprinkled into cold water under high-speed mixing, and the dye bath should not be left for a long time after preparation. It needs to be gradually mixed with a mixer to avoid sedimentation.