How to reduce the liquor ratio of overflow dyeing machine
Sep 12, 2022
At present, the overflow dyeing machine has optimized the two main forms of growth tube L-shaped and cylindrical U-shaped and 0-shaped. Because the cloth storage tube of the L-type dyeing machine is long and horizontal, the liquor ratio is slightly larger than that of the U-type or 0-type dyeing machine.
In order to reduce the dyeing bath ratio of the overflow dyeing machine, the water volume in the circulation pipeline, especially the water volume in the cloth storage tank, should be reduced as much as possible. The U-type or O-type overflow dyeing machine has gone through three main stages in the development of reducing liquor ratio.
(1) The fabric is fully immersed: the fabric is almost completely immersed in the dyeing solution of the stored fabric, and the bath ratio is 1:10-1:15.
(2) Partially dyed fabric type: The cloth-liquid separation technology developed in the 1990s added an interlayer at the bottom of the cloth storage tank, so that the fabric runs in the cloth storage tank, and the dye liquor circulates rapidly in the interlayer.
ring, only part of the fabric is dipped in the dye liquor. Therefore, the amount of dyeing solution is reduced, and the dyeing bath ratio is reduced to 1:7~1:10.
(3) The cloth liquid is completely separated: the rapid circulation of the dye liquor is retained, and the innovation is that there are many gaps on the separator. The dye liquor flowing into the cloth storage tank and the excess dye liquor on the fabric can be quickly returned to the dye liquor interlayer through the gap, that is, quickly enter the pipeline circulation system for circulation. This innovative technology significantly reduces the bath ratio, up to 1:3.5~1:4, and the dyeing bath ratio for cotton fabrics is reduced to 1:5. The bath ratio of dyeing cotton fabrics is larger than that of dyeing hydrophobic fabrics such as pure polyester. This is because the amount of water absorbed by cotton fabrics is about three times the weight of the fabrics, and the water consumption for preparing dyes, salts and lye is larger.
In the dyeing process, because the ECO series dyeing bath ratio is low. The fabric carries less water during operation. The running weight of the fabric is reduced to the greatest extent, thereby reducing the tension of the fabric and the fluffing phenomenon caused by friction, and improving the surface effect of the fabric. Reduced shrinkage.