Functional Dyeing Synchronized with CO2 Supercritical Technology

Organization: Industrial Technology Research Institute (ITRI)
Co-Developer(s): Eclat Textile Co., Ltd.
Year: 2018

Large quantities of water are required for textile processing, dyeing and printing. On average, an estimated 100 to 150 liters of water are needed to process 1 kg of textile material, with some 28 billion kilos of textiles being dyed annually. Therefore, the textile industry has accelerated efforts to reduce or eliminate water consumption in all areas of yarn preparation, dyeing, and finishing. Functional Dyeing Synchronized with CO2 Supercritical Technology replaces water with carbon dioxide, saving water and simplifying the manufacturing procedure. The technology will also further reduce the use of chemicals and energy. CO2 Supercritical Technology is a one bath supercritical fluid dyeing process for polyethylene terephthalate/elastic textile. It is designed with the dye structure containing hard segment (chromophore) and soft segment (auxochrome) to get higher dyeing fastness. The hydrophilic copolymer was designed through CO2-philic/ hydrophilic segment ratio to give dry fit functionality without water.

For more info: