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 CeGlaFlex project: wafer-thin, unbreakable and flexible ceramic and glass
25.04.2017 | Fraunhofer-Institut für Lasertechnik ILT

nachricht Additive manufacturing, from macro to nano
11.04.2017 | Laser Zentrum Hannover e.V.

All articles from Process Engineering >>>

The most recent press releases about innovation >>>

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

Im Focus: Making lightweight construction suitable for series production

More and more automobile companies are focusing on body parts made of carbon fiber reinforced plastics (CFRP). However, manufacturing and repair costs must be further reduced in order to make CFRP more economical in use. Together with the Volkswagen AG and five other partners in the project HolQueSt 3D, the Laser Zentrum Hannover e.V. (LZH) has developed laser processes for the automatic trimming, drilling and repair of three-dimensional components.

Automated manufacturing processes are the basis for ultimately establishing the series production of CFRP components. In the project HolQueSt 3D, the LZH has...

Im Focus: Wonder material? Novel nanotube structure strengthens thin films for flexible electronics

Reflecting the structure of composites found in nature and the ancient world, researchers at the University of Illinois at Urbana-Champaign have synthesized thin carbon nanotube (CNT) textiles that exhibit both high electrical conductivity and a level of toughness that is about fifty times higher than copper films, currently used in electronics.

"The structural robustness of thin metal films has significant importance for the reliable operation of smart skin and flexible electronics including...

Im Focus: Deep inside Galaxy M87

The nearby, giant radio galaxy M87 hosts a supermassive black hole (BH) and is well-known for its bright jet dominating the spectrum over ten orders of magnitude in frequency. Due to its proximity, jet prominence, and the large black hole mass, M87 is the best laboratory for investigating the formation, acceleration, and collimation of relativistic jets. A research team led by Silke Britzen from the Max Planck Institute for Radio Astronomy in Bonn, Germany, has found strong indication for turbulent processes connecting the accretion disk and the jet of that galaxy providing insights into the longstanding problem of the origin of astrophysical jets.

Supermassive black holes form some of the most enigmatic phenomena in astrophysics. Their enormous energy output is supposed to be generated by the...

Im Focus: A Quantum Low Pass for Photons

Physicists in Garching observe novel quantum effect that limits the number of emitted photons.

The probability to find a certain number of photons inside a laser pulse usually corresponds to a classical distribution of independent events, the so-called...

Im Focus: Microprocessors based on a layer of just three atoms

Microprocessors based on atomically thin materials hold the promise of the evolution of traditional processors as well as new applications in the field of flexible electronics. Now, a TU Wien research team led by Thomas Müller has made a breakthrough in this field as part of an ongoing research project.

Two-dimensional materials, or 2D materials for short, are extremely versatile, although – or often more precisely because – they are made up of just one or a...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Expert meeting “Health Business Connect” will connect international medical technology companies

20.04.2017 | Event News

Wenn der Computer das Gehirn austrickst

18.04.2017 | Event News

7th International Conference on Crystalline Silicon Photovoltaics in Freiburg on April 3-5, 2017

03.04.2017 | Event News

 
Latest News

Scientist invents way to trigger artificial photosynthesis to clean air

26.04.2017 | Materials Sciences

Ammonium nitrogen input increases the synthesis of anticarcinogenic compounds in broccoli

26.04.2017 | Agricultural and Forestry Science

SwRI-led team discovers lull in Mars' giant impact history

26.04.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>