Introduction to fixing agents
Time：
Jul 28,2022
Fixing agent is one of the important additives in the printing and dyeing industry, which can improve the color fastness to moisture treatment of dyes on fabrics. It can form insoluble colored substances with dyes on fabrics, improving their washing and sweat fastness, and sometimes also enhancing their sun fastness.
Fixing agent is one of the important additives in the printing and dyeing industry In recent years, with the development of science and technology, dyeing and finishing technology has also been significantly improved. Due to the expansion of international textile trade and the improvement of people's living standards and environmental awareness, textiles are required to be comfortable, clean, and safe Since the 1970s, when Germany first launched the "Blue Angel" program, some developed countries in the world (Japan, the United States, etc.) have successively passed and implemented relevant laws and regulations, specifying various indicators of textiles Green textiles require the prohibition of the use of carcinogenic, teratogenic, and biodegradable dyes and certain aromatic amine intermediates produced by regulations in printing and dyeing processes. At the same time, it is also required that the additives used do not contain heavy metal ions and do not produce free formaldehyde, that is, the use of "green additives". The development and application of formaldehyde free fixing agent KS is in line with this requirement. Fixing agent KS is obtained by polymerizing organic amines with epichlorohydrin, and then acidified with hydrochloric acid. It is used for fixing cotton with reactive, direct, and sulfurized dyes. It can "bridge" between dyes and fibers to form compounds, that is, react with dye molecules at the same time, crosslink with cellulose fibers, and form a highly diversified crosslinking system, making dyes and fibers more diverse. Firmly bonded, preventing dye from falling off the fiber and improving color fastness The active substances in the fixing agent can condense with each other, forming a three-dimensional network film on the fiber surface, sealing the dye, increasing the smoothness of the fabric surface, reducing the friction coefficient and not easily worn out, further preventing dye swelling, dissolution, and detachment during wet friction, and improving wet rubbing fastness
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