How to make up the dye bath in airflow dyeing

The dye bath for airflow dyeing is composed of the amount of liquid required for the fabric to absorb moisture and swell, and the amount of liquid that meets the needs of pipeline dye liquor circulation and dissolved dyeing materials at the same time. There is no need for water to drive the fabric to run, so the dyeing bath than lower. And low liquor ratio dyeing, easy to produce liquor ratio fluctuations, have a certain impact on dyeing. The factors that cause the fluctuation of the bath ratio in the dyeing process are introduced, and the precise control of the bath ratio in the dyeing process is explained.

The liquor ratio is an important process condition in the water dyeing of rope fabrics. The air-flow dyeing bath ratio is low, and the accuracy and stability of the bath ratio have a great influence on the control of the dyeing quality. In the air-flow dyeing process, how to accurately control the bath ratio, avoid the fluctuation of the bath ratio during the dyeing process, and reduce due to the bath ratio. The influence of factors on the dyeing quality

A feature of the airflow dyeing machine is that the main driving force for the circulating operation of the fabric is high-speed airflow. During dyeing, in addition to the dye liquor on the cloth, the circulating fabric is separated from the free dye liquor. Therefore, strictly speaking, airflow dyeing The dyebath in the dye bath consists of the following parts:

The first part is the dye liquor in the filter and in the circulating pipeline. The amount of dye liquor in this part should meet two conditions at the same time. One condition is the need to fully dissolve the dyestuff, and the other condition is the main pump and pipeline. The need for dye liquor circulation in the circulation system, the amount of dye liquor in this part is constant, is determined by the cylinder type of the airflow dyeing machine, the same cylinder type has the same value, of course, between different equipment manufacturers, its Quantities may vary.

The second part is the part of the dye solution that flows freely on the surface of the fiber without penetrating into the inner pores of the fiber after the fabric fiber absorbs moisture and swells, which is called the unbound free dye solution.

The third part is the part of the dye solution that penetrates into the pores of the fiber after the fiber absorbs moisture and swells, which is called the combined dye solution.

The sum of the last two parts of the dye liquor is actually the amount of liquid carried by the fabric during the dyeing process, which is related to the type of fabric fiber and the weight of the dyed fabric. For the same fabric type, the weight of the dyed fabric is different, and the required liquid amount is different. For different fabric varieties, even if the weight of the dyed fabric is the same, the required liquid value is different. This liquid value, the conventional old varieties have empirical values, and for new varieties, they can be obtained through experiments, so any variety of fabrics , in the dyeing process, the amount of liquid required for hygroscopic swelling is known.