In people’s daily life, textiles are closely related to our life and will not and cannot disappear from the trend of social development. The vigorous development of the textile industry also promotes the development of society. It can be seen that the textile industry plays an important role in China’s economic development.
With the continuous improvement of people’s living standards, people also have further requirements for the fabric, style, pattern and color fastness of textiles. In order to meet the requirements of product color fastness, it is necessary to increase the link of color fixation treatment after textile dyeing. Color fixing agent belongs to a kind of important chemical additives to improve the combination fastness of dyes and textiles. Since it belongs to chemical additives, it is inevitable that a small number of chemical molecules will be released during the use of textiles. These chemical molecules may cause harm to human body, the most typical of which is
It’s formaldehyde. The basic criteria for determining the properties of color fixing agents are whether the formaldehyde exceeds the standard and whether its own color fixing ability meets the standard.
In the process of textile dyeing, direct dyes and acid dyes are usually used. Because these dyes not only have a rich color range, but also can dye very bright colors, they are loved by the public. However, generally, the wet rubbing fastness of the fabric is not good enough, and the phenomenon of fading or staining with white cloth will appear. This is because the groups on the dyes have certain hydrophilicity and will fall off from the fabric in aqueous medium. After the fabric is dyed with reactive dyes, although it can form stable and firm covalent bonds with fibers, in fact, the unreacted part and hydrolyzed part of the dyes can not meet the requirements of complete washing from the dyed fabric, and the covalent bonds formed between fabric fibers and dyes will also be hydrolyzed, so these dyes will fade.
The early color fixing agent y and color fixing agent m usually contain free formaldehyde that exceeds the current color fixing agent standard, which will be released during the use of fabrics, resulting in skin inflammation and even ulceration. Therefore, the development of formaldehyde free color fixing agent is an inevitable problem in the textile industry.
For a long time, through the efforts of many researchers, a variety of aldehyde free color fixing agents have been developed. Because they do not contain substances such as formaldehyde, aromatics and heavy metals harmful to human body, and can significantly improve the color fastness of fabrics, the quality of textile products has made a great breakthrough. Aldehyde free color fixing agents have become very popular color fixing agents in the market.
