High temperature steaming machine What role does it play?

After textile printing, except for ice dyes and soluble vat dyes, general dyes must be steamed.

Its purpose is to make the printed textile complete the moisture absorption and temperature rise of fiber and color paste film, accelerate the reduction and dissolution of dyes on the fiber, and make the dyes diffuse into the fiber and fix on the fiber. The process conditions of steaming vary with the properties of dyes and fibers. In the process of steaming, the steam first condenses on the textile, and then the temperature of the textile rises rapidly. At the same time, the fiber is hygroscopically expanded. After the color paste absorbs water, it accelerates the full dissolution of dyes and chemicals, which is conducive to the generation of chemical action, promoting the transfer of dyes from the color paste to the fiber, and diffusing to the interior of the fiber to produce color fixation. The main factors affecting the moisture absorption of color paste are Steaming machine Temperature and relative humidity inside.

The steaming equipment is selected according to the steaming process conditions, fabric properties and production scale. For some easily deformed fabrics such as silk, loose steaming equipment shall be used, intermittent steaming equipment can be used for small batch production, and loose continuous steaming machine such as loose bottomless long ring steaming machine can be used for large batch production. Generally, there is a row of guide rollers at the top and bottom of the steaming machine, and the fabric is dragged forward by the upper row of guide rollers. After the fabric is printed, there is a lot of color paste on the cloth surface. To avoid "sizing", the surrounding continuous steaming machine with the back of the fabric in contact with the guide roller can be used.

After steaming, the color paste, paste, residual chemicals, dyes and other substances on the fabric must be washed away, while ice dyes and vat dyes must also be soaped to obtain good color and fastness. The washing and soaping of fabrics are generally carried out on the multi grid washing machine, and the whole washing process is completed through the diffusion of dyes and the exchange of washing liquid.

The original paste in the color paste can be washed off after swelling. The difficulty of washing off is directly related to the nature of the paste and their heating in the pre processing process. Residual dyes, chemicals and other substances are diffused into the washing solution and washed off the fabric under the constant replacement of fresh washing solution. In order to improve the washing effect, the general washing equipment should meet the following requirements and design, namely: increase the washing temperature; Design washing facilities with oscillating effect; Design the equipment that can force the washing solution to penetrate the fabric; Make the washing liquid on the washing machine countercurrent; Increase the cloth capacity to extend the action time of the fabric in the lotion.

In short, the design of the washing machine should be conducive to the desorption of residual dyes and pastes to prevent re staining of the fabric. The commonly used steaming equipment includes the reduction steaming machine and high-temperature atmospheric pressure steaming machine mainly used for cotton and its blended fabrics, the cylinder steaming machine used for silk fabrics, and the simple steaming room equipment used for the reproduction industry such as bed sheets, etc.