Overflow jet printing and dyeing machine in the process of knitted fabric dyeing

　　The overflow jet printing dyeing function can dye and process most knitted fabrics. The dyeing products are of good quality and reasonable cost, so they have a high share of dyeing equipment in knitted fabric printing and dyeing enterprises.

　　The following matters should be paid attention to during the dyeing process of overflow jet printing and dyeing machine;

　　(1) Control the bath ratio and determine the size of the bath ratio and is related to the thickness of the processed knit fabric. When processing light and thin fabrics, the bath ratio should be larger, because thin fabrics are larger in volume and longer in length; conversely, when processing thicker fabrics, the bath ratio may be smaller. The size of the general bath ratio can make the fabric run around the machine for about 1.5 to 2 rain. Practice has proved that if the fabric rotates too fast, the more times the fabric contacts the guide roller, the interweaving points of the fabric will often slip; if the speed is too slow, it is easy to produce color flowers. This is because the fabric accumulates in the storage cabinet for a long time, and the fabric is inevitably subject to uneven heat during the retention of the machine, which leads to color light and color flowers. In addition, the flow direction and speed of dye liquid in the machine will also cause fabric knotting and blocking.

　　(2) Master the heating, insulation and cooling during the dyeing process, and avoid major ups and downs. As originally. 1. C. /min heating or cooling can be accelerated or slowed down by 0.5 if other factors are taken into account. C, i.e. l. 5. C/min or 0.5. C/rain.

　　(3) Control the pH value well. First, control the pH value to meet the process requirements when dispensing the liquid. It is more important to control the pH value during the dyeing process. The dyeing additives should be selected with caution. For example, when using dispersed dyes to dye polyester and its blended interwovens, the pH value can be adjusted to 5±0.5 with 98% glacial acetic acid. 0 When the dye solution is heated or the auxiliary is used incorrectly, the pH value of the dye solution will increase, causing the dye bath. of. The pH value is unstable. If ammonium sulfate is added, it can stabilize the pH value of the dye bath, and ammonium dihydrogen phosphate can also be added.

　　(4) Strictly implement and add materials and add materials in accordance with the operating regulations. Taking dispersed dye as an example, dispersed dye itself is a nonionic hydrophobic dye, but it has been filled with diffuser MF when commercialized. Some even add diffuser NNO (not resistant to high temperatures) and sodium lignin sulfonate. , dustproofing agents and inorganic salt compounds. Therefore, the commercially available dispersed dyes are anionic dyes. Due to their low solubility, the dye is an extremely fine particle suspension in water, so it can only be used for 30. C hydrating material. If the water temperature of the chemical material is too high, it tends to accumulate dyes. Sometimes, even after stirring or even sieve, secondary condensation will occur after entering the dye bath, which can easily cause spots during dyeing. Secondly, pay attention to the speed and concentration when adding the dyer. Generally, it should be diluted to 1:10, that is, the lk9 dye or additive is diluted with lok9 water, and it should be more than less. Then slowly inject the dyeing machine in about 5 minutes, and it is not advisable to rush it.