Using Water-Less Technologies in the Dyeing Process

Water scarcity and water pollution can derail your production process or supply chain, lead to fights with other water users, or damage business reputations.

The problems of large water consumption are closely linked to the textile industry which has become a global industry nowadays. Textiles adorn every element of your daily life, from designer clothes and furniture to the filters of your washing machines and vacuum cleaners. However, the same textiles leave maximum water imprints on Mother Earth and pose a big problem for the delicate ecological balance. Polyester and cotton, two of the largest mass-marketed textiles, require large amounts of water in their dyeing process.

The country’s dye shops not only consume huge amounts of water for this purpose, but also discharge large amounts of harmful effluent into local rivers or streams. One of the biggest challenges facing the textile industry is the use of water-friendly technologies or the establishment of efficient water management systems. It is essential that the industry take major steps to mitigate the environmental damage caused by the dyeing process which uses various dyes such as acid dye manufacturers, reactive dye manufacturers, vat dye manufacturers, basic dyes , etc.

Some steps in this regard have been taken by several manufacturers. One way is to reduce the dye-to-water ratio, but the answer to this lies in the mechanization of the factory’s manufacturing processes. In addition, natural fibers are a big problem for adopting waterless dyeing methods. Polyester can be colored in an airless environment where the dyes are dispersed throughout the material under pressure at high temperature. However, wool and cotton suffer damage if they pass through this environment.

Despite this, several companies have undertaken efforts to significantly reduce the consumption of water in dyeing natural fibers. One effort in this regard has been to change the molecular structure of cotton so that it allows the dyes to be dispersed throughout the fabric using very less amounts of water. It is said that both energy and water consumption have been significantly reduced with this technology. Another technique used is to incorporate textile dyes into the fabric, while using air for the dye dispersal process.

Yet another method which has been accepted in the industry is the use of pressurized and compressed carbon dioxide to disperse the dye in the fabric. The carbon dioxide which is contained in stainless steel chambers takes on liquid-like properties. After the dyeing process is complete, the carbon dioxide takes on its gaseous form and separates from the dye inside the fibers. The dye in the fiber condenses and the carbon dioxide is recycled and reused for the dyeing process. However, this is simply said to be done because the investment required for the technology is still huge.

Still, many large companies are actively looking for ways to reduce or eliminate water consumption in their dyeing process and the day when all manufacturers use waterless or nearly waterless dyeing technologies will not be far off.

Source by Mihir Vora

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