Notes on feeding and chemical materials in overflow dyeing machine
May 23, 2022
The overflow dyeing machine should carefully carry out chemical and feeding according to the operation regulations. Taking disperse dye as an example, disperse dye itself is a non-ionic hydrophobic dye, but it has been filled with diffusing agent MF when commercialized, and some even added diffusing agent NNO (not resistant to high temperature), and sodium lignosulfonate. , dust-proofing agents and inorganic salt compounds. Therefore, the commercially available disperse dyes are anionic dyes. Due to their low solubility, the dyes are in very small particle suspensions in water, so only hydration materials at about 30°C can be used. If the water temperature of the chemical material is too high, it tends to cause the dye to agglomerate. Sometimes it is stirred or even sieved into the vat, but secondary agglomeration will occur after entering the dye bath, and it is easy to produce spots during dyeing.
Secondly, pay attention to the speed and concentration when adding to the dyeing machine. Generally, it should be diluted to 1:10, that is, 1kg of dyes or auxiliaries should be diluted with 10kg of water. Then slowly inject it into the dyeing machine for about 5 minutes, and it should not be rushed. The overflow dyeing machine can choose automatic feeding to control the feeding time and feeding speed, which is more convenient to operate.