D3 – Water-efficient textile machinery

Partner: THIES, HN-FTB

Objective
Anything fed into a dyeing machine will also be discharged. The waste water from the dyeing process has a high coloration and is highly contaminated with chemicals and electrolytes.

The aim is to reduce the energy consumption and the use of resources while maintaining the fabric quality. By introducing new technologies and optimizing the process steps by providing the user with visual reports of the process, the targeted adaptation of selected process steps is made possible, resulting in resource savings and overall more efficient processes.

Current Results
Together, the Research Institute for Textile and Clothing (FTB), the CHT Group and Thies Textilmaschinen have conducted several dyeing experiments both in laboratories and textile mills.

Through the use of optimized dyeing machines in combination with optimized recipes for the dyes, water savings of 10 to 19% have been achieved in the experiments.

The installation of a Thies DyeControl in existing iMaster exhaust dyeing machinery for online opacity measurements of the liquor to optimize rinsing time and number of rinsing baths resulted in a decrease of water use for black shade dyeing from 69 to 52-62 L/kg textile. Overall, a reduction of 10 to 15% of water use for textile finishing seems feasible by installing water efficient textile machinery.

Expected Outcome
By introducing the new DyeControl measurement technology, energy and water savings will be achieved. DyeControl is an additional system for the analysis and optimization of dyes and treatments for the exhaust procedure. DyeControl produces an accurate image of the dyeing profile. The online measurements of the rinsing and washing processes as well as the dye baths allows for a continuous analysis, the results of which can then be displayed graphically. In rinsing processes, the rinsing time and the number of rinsing baths can be optimized. The dyeing profile further allows for the automated optimization of the rinsing processes.