How does the air dyeing machine realize cleaner production
Mar 22, 2022
The overflow dyeing machine and the airflow dyeing machine are currently developing towards high quality, good hand feeling, wide applicability, short process flow, energy saving, water saving, small batch and large load, automatic control and ecological environmental protection.
A jet dyeing machine is usually defined as a dyeing machine with a nozzle pressure between 2-3kg/cm2. Its characteristic is that the nozzle pressure is high, the jetted liquid flow generates enough thrust to push the fabric to run, and the cloth guide roller only plays the role of guiding the fabric and measuring the speed. Due to the fast cloth speed, the dye liquor and the fabric are exchanged frequently within a unit time, thereby improving the leveling effect and avoiding permanent wrinkle marks. This type of equipment is more suitable for the dyeing of purified fiber fabrics or woven fabrics. For fabrics with loose structure, due to the large continuous friction and tension (the fabric is impacted by the large thrust of the liquid flow and is entrained), it is easy to cause pilling and elongation. Jet dyeing machine can not only be used for fabric dyeing, but also for fabric desizing, pre-shrinking and alkali reduction treatment of polyester fabrics.
In order to reduce the impact of water on the loose fabric, reduce the phenomenon of pilling, and improve the feel and appearance of the fabric, the lifting roller (cloth guide roller) is widely used to assist the running of the fabric, and the nozzle pressure is reduced to 0-1kg/cm2, Such low-pressure nozzle dyeing machines are called overflow dyeing machines, and dyeing machines with a nozzle pressure of 1.2kg/Cm2 are usually called slow-flow dyeing machines. Due to the slight impact of the nozzle liquid on the fabric, the application of the overflow dyeing machine is more extensive than that of the jet dyeing machine and the slow flow dyeing machine.
According to the needs of different dyeing temperatures, the overflow dyeing machine can be divided into high temperature and high pressure type and normal temperature and normal pressure type.
The main difference between an airflow dyeing machine and an overflow dyeing machine is that the overflow dyed fabric runs by liquid flow, while the airflow dyeing machine uses an aerodynamic system to propel the fabric. The running speed of the fabric is related to parameters such as the grammage of the fabric, the air permeability (related to the square grammage of the fabric and the tissue structure), the dry-wet state and the dry-wet friction factor.
Airflow dyeing also has an independent liquid circulation system. Air atomization dyeing is to mix air flow and overflow at the nozzle. Since there is no liquid circulation, ultra-low liquor ratio can be achieved, and the fabric is dyed in the atomized dye liquor. Atomization dyeing is suitable for processing microfiber fabrics and synthetic fabrics.