What should be paid attention to when feeding and chemicalizing the overflow dyeing machine?
May 01, 2023
The function of the overflow dyeing machine is to dye most of the knitted fabrics. Due to the high quality of the dyed products and the reasonable cost, it has a relatively high share in the dyeing equipment of the knitting printing and dyeing enterprises.
However, when using, the addition of raw materials should be carefully carried out in accordance with the operating regulations. Taking disperse dyes as an example, disperse dyes themselves are non-ionic hydrophobic dyes, and some even add diffusing agent NNO (not resistant to high temperature), sodium lignosulfonate, dustproof agent and inorganic salt compounds.
Therefore, commercially available disperse dyes are anionic dyes with low solubility, and the dyes are in the form of small particle suspensions in water, so only hydrated materials at about 30°C can be used.
If the water temperature of the chemical material is too high, there is a tendency for the dye to condense. Although it is sometimes stirred and filtered into the cylinder, it will cause secondary condensation when it enters the dye bath, and it is easy to cause spots when dyeing.
Secondly, we should pay attention to the speed and concentration when putting into the dyeing machine. Usually it is 1:10, that is, 1kg of dye or auxiliaries must be diluted with 10kg of water. After that, slowly inject it into the dyeing machine in about 5 minutes, and it is not advisable to act too hastily.
The overflow dyeing machine can choose to add automatically, and the time and speed of adding can be controlled, and the operation is more convenient.
Facts have proved that if the rotation speed of the fabric is too fast, the more times the fabric is in contact with the guide roller, the easier the interlacing point of the fabric will slip. If the rotation speed is too slow, it will be easily colored.
This is because the fabric is accumulated in the storage box for a long time, and the heat unevenness will inevitably occur when the fabric stays in the machine, causing color light and color flowers. In addition, the slow flow and speed of the dye liquid in the machine will also cause knots or blockage of the fabric.
