Airflow Dyeing Machine
Airflow Dyeing Machine – Discontinuous processing of textile substrates requires more water and energy compared to continuous processes. However, for a long time efforts are undertaken to optimise discontinuous process with respect to productivity, efficiency and also to minimise energy and water consumption respectively. This lead to dyeing jets. Thereby liquor ratios have been reduced step by step. The latest developments have liquor ratio of 1:3 (for woven and PES fabric) and 1:4.5 (for woven CO fabric), instead of 1:10-1:12. Besides, the airflow dyeing machine offers combination of high productivity and reproductively and reduction of water, chemicals and energy consumption. It is similar to IR Dyeing Machine
To achieve such low liquor ratio, within the (jet) machine, the fabric is moved by moisturised air or a mixture of steam and air only (no liquid) along with a winch.
Rinsing is carried out in a continuous manner. During the whole rinsing process, the bottom valve is opened and rinsing water is discharged without additional contact with the fabric (which is the case in conventional machine). This also allows the discharge of hot bath liquors, also after high-temperature dyeing at 130oC. Thus, in addition to time saving, optimum heat recovery can be performed. The fabric itself is processed with low tension and crease formation is minimised.
Due to lower liquor ratio, the new airflow-dyeing machine is expected to save up to 60% in water, and heating energy, 40% in chemicals, 35% in salts (and even 10% in dyestuffs).
The application in this technique needs investment in new dyeing machine. Existing machine can not be retrofitted. The machine can be used for both knit and woven fabric and for nearly kinds of textile substrates.
Not applicable to fabrics consisting of wool or wool blends with a percentage of more than 50% wool because of felting. It is not recommended to dye linen fabric because of scaling of the machine with linen fluffs.
The system has been approved for silk, but it is still rarely applied in practice.
Investment cost for airflow dyeing machines, compared to conventional dyeing jets are around one third higher.
For one storage chamber, 150kg, it costs USD 190500.
Two storage chambers, 450kg, it costs USD 240000.
Three storage chambers, 625kg, it costs USD 309500.
Four storage chambers, 900kg, it costs USD 362000.
(Note Airflow Dyeing Machine : Please check the latest price from the market. It might vary depending on different tax and other charges in your country)