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100% polyester yarn DTY filament dty knitting yarn 150D96F

A new type of water-free disperse dye paste to alleviate the pressure of dyeing water pollution

On May 7, a company developed a new type of water-free environmental friendly high fastness nano disperse dye paste, which can reduce the use of dyeing and finishing auxiliaries without changing the existing dyeing process, make the water-saving efficiency of the printing and dyeing process more than 60%, and effectively alleviate the pressure of water pollution faced by the printing and dyeing industry.

Under the background of increasingly severe environmental protection, solving the problem of water pollution is the top priority of the printing and dyeing industry. In the textile printing and dyeing industry, there are many problems such as floating color and low color fastness. It is mainly due to the dye particles staying on the fiber surface, not entering the fiber and combining with the fiber. For many years, washing has been regarded as the only way to remove floating color and improve color fastness.

"The CC series of new environmentally friendly, water-free and high fastness nano disperse dye pastes developed by us is a new water-saving dyeing product." Du Changshen, vice president of the company, introduced that the technology effectively solved the water pollution caused by the traditional printing and dyeing auxiliaries and their solubilizing dyes, so that the dyeing bath can be recycled and recycled, and more than 60% water can be saved in the dyeing process of polyester fabric.

"In particular, the product uses hyperbranched polymer with multi active functional groups to modify disperse dyes, which solves the problem that the color fastness of fabrics is difficult to reach the standard. When the dye is steamed at high temperature, the hyperbranched polymer will coat the dye which is not completely into the fiber structure, thus forming microcapsules. The combination of this structure and polyester fabric is strong, so the printing and dyeing washing process is reduced, the sewage discharge is reduced, and the sewage COD content is also less. " Du Changshen said.

The polyester fabric dyed with the product has high color fastness, good softness, high water-saving efficiency, and can reduce the consumption of reducing detergent, softener and other printing and dyeing auxiliaries by more than 50%. It can also achieve the effect of color fastness and uniform coloring for polyester fabric with high twist and tightness.

In addition, CC series of new water-free environmental friendly high fastness nano disperse dye pastes have been applied in printing and dyeing enterprises in Shandong, Jiangsu, Zhejiang and other places. According to the user's reaction, dyeing with this technology has the characteristics of saving more than 60% water, high color fastness, good hand feeling, saving time and materials, etc.

It is understood that polyester fiber is a kind of hydrophobic fiber with good physical and chemical properties and tight structure, which is usually dyed with disperse dyes. When disperse dyes are used to dye polyester fabric, it is impossible to ensure that all dye molecules enter into the fiber when dyeing, especially when dyeing in medium and dark colors, a large number of disperse dyes will adhere to the fiber surface. Only by removing the floating color can the fiber color be firmer.

The traditional dyeing technology is completed under the joint action of various auxiliaries, which also leads to a huge amount of auxiliaries. After dyeing, all these auxiliaries enter the water, forming the first pollution source of dyeing industry. In addition, in order to ensure the color fastness of the dyed products to meet the requirements, a sufficient washing process is also essential. A series of washing aids such as detergent are needed, forming another major pollution source in the dyeing industry.