Waterfree and Environmental-friendly Textile Dyeing
As key natural resources on our planet, such as water, come increasingly under pressure from domestic and industrial demand, we must re-evaluate traditional processes and find ways to make them more sustainable.
Using waste CO2 to save water in fabrication
The garment industry is typically a heavy consumer of water. The Dutch company DyeCoo Textile Systems offers the world's first dyeing solution that uses no water and is process chemical-free. The technology utilises reclaimed CO₂ as the dyeing medium in a closed-loop process. When pressurized, CO₂ becomes supercritical (SC-CO₂): a phase between a liquid and a gas. In this state, CO₂ has a very high solvent power, allowing the dye to dissolve easily. Thanks to the high permeability, the dyes are transported easily and deeply into fibres, creating vibrant colours.
Co2 closed-loop system
CO₂ dyeing does not need added process chemicals to dissolve dyes. DyeCoo technology uses 100% pure dyes and with more than 98% uptake, none of it is wasted. No process chemicals, no water, no wastewater, and therefore no wastewater treatment is necessary. The CO₂ used is reclaimed from existing industrial processes, recycling 95% of it in a closed-loop system.
The DyeCoo process also liberates fabric producers from having to locate close to ready supplies of water. While, on a global scale, water is scarce and carbon dioxide is 'readily available' in abundance, integrated solutions can respond to both issues in an intelligent way.
Sustainable Urban Delta
The inherent complexities and pressures associated with densely populated urban areas are second nature to the Dutch. Over many centuries, authorities, industries, knowledge institutes, and citizens have striven to develop integrated approaches and a holistic vision to enable sustainable development of the urban environment – the Sustainable Urban Delta.