Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

A cheaper and more environmentally friendly process for dyeing fabric

17.09.2003


Fabric has been dyed by the same wasteful method for over 100 years. This involves chemical agents being added to a dye bath and thrown away afterwards. A new process developed by EUREKA project E! 2625 EUROENVIRON ECDVAT (ElectroChemical Dyeing with Vat dyes) replaces environmentally damaging chemical reducing agents with electrons.

According to Prof. Dr. Thomas Bechtold of the University of Innsbruck’s Textiles Department, the new process can be more easily controlled. Using the conventional method, the amounts of chemicals and the bath temperature have to be calculated very carefully to get the dye level right. “With the new method, dyers can monitor the situation in the dye bath and can increase the electrochemical addition of chemicals to “steer” the process. Using electrons instead of chemicals means that the dye bath can be monitored and adjusted in real time,” explains Bechtold. “This is a big advantage and allows us to maintain the high quality of the dyed fabric,” he says.

The new process also has environmental benefits. Any chemicals released with ECDVAT are easily biodegradable and the partners are working towards greater water savings, expected to be as high as 85% of the volume used today in the dyeing process.



Dr. Wolfgang Schrott, Head of Technical Marketing at the German project partner, Dystar Textilfarben GmbH & Co. Deutschland KG, says that the project is a “big technical success,” but the equipment is still too expensive from a commercial point of view. “We need to concentrate on making the machinery cheaper,” he says.

“We expect savings in chemical costs and in fresh water and waste water treatment and to create better controlled processes with improved reliability, thus lowering the costs of unsatisfactory dyeings,” says Bechtold. “The development of cheaper and more efficient equipment on the basis of the results of ECDVAT will lower the costs further and make our high quality vat dyeing process even more attractive and competitive.”

Now the team’s strategy is to broaden the uses of the technology to bring down the cost and continue to make the process more profitable.

The partners expect other firms to become interested before too long as they are presenting their work at the “textile Olympics” – the four-yearly International Textile Machinery Association fair in Birmingham, UK, in October 2003.

“Being part of EUREKA helped in the formation of the group and brought extra funding,” explains Bechtold. “In Austria there is a special funding structure which increases financial support if a EUREKA project is formed.”

Nicola Vatthauer | alfa
Further information:
http://www.eureka.be/ecdvat

More articles from Process Engineering:

nachricht New manufacturing process for SiC power devices opens market to more competition
14.09.2017 | North Carolina State University

nachricht Quick, Precise, but not Cold
17.05.2017 | Fraunhofer-Institut für Lasertechnik ILT

All articles from Process Engineering >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Smart sensors for efficient processes

Material defects in end products can quickly result in failures in many areas of industry, and have a massive impact on the safe use of their products. This is why, in the field of quality assurance, intelligent, nondestructive sensor systems play a key role. They allow testing components and parts in a rapid and cost-efficient manner without destroying the actual product or changing its surface. Experts from the Fraunhofer IZFP in Saarbrücken will be presenting two exhibits at the Blechexpo in Stuttgart from 7–10 November 2017 that allow fast, reliable, and automated characterization of materials and detection of defects (Hall 5, Booth 5306).

When quality testing uses time-consuming destructive test methods, it can result in enormous costs due to damaging or destroying the products. And given that...

Im Focus: Cold molecules on collision course

Using a new cooling technique MPQ scientists succeed at observing collisions in a dense beam of cold and slow dipolar molecules.

How do chemical reactions proceed at extremely low temperatures? The answer requires the investigation of molecular samples that are cold, dense, and slow at...

Im Focus: Shrinking the proton again!

Scientists from the Max Planck Institute of Quantum Optics, using high precision laser spectroscopy of atomic hydrogen, confirm the surprisingly small value of the proton radius determined from muonic hydrogen.

It was one of the breakthroughs of the year 2010: Laser spectroscopy of muonic hydrogen resulted in a value for the proton charge radius that was significantly...

Im Focus: New nanomaterial can extract hydrogen fuel from seawater

Hybrid material converts more sunlight and can weather seawater's harsh conditions

It's possible to produce hydrogen to power fuel cells by extracting the gas from seawater, but the electricity required to do it makes the process costly. UCF...

Im Focus: Small collisions make big impact on Mercury's thin atmosphere

Mercury, our smallest planetary neighbor, has very little to call an atmosphere, but it does have a strange weather pattern: morning micro-meteor showers.

Recent modeling along with previously published results from NASA's MESSENGER spacecraft -- short for Mercury Surface, Space Environment, Geochemistry and...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

World Health Summit 2017: International experts set the course for the future of Global Health

10.10.2017 | Event News

Climate Engineering Conference 2017 Opens in Berlin

10.10.2017 | Event News

Conference Week RRR2017 on Renewable Resources from Wet and Rewetted Peatlands

28.09.2017 | Event News

 
Latest News

A single photon reveals quantum entanglement of 16 million atoms

16.10.2017 | Physics and Astronomy

The melting ice makes the sea around Greenland less saline

16.10.2017 | Earth Sciences

On the generation of solar spicules and Alfvenic waves

16.10.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>