Spandex is a type of fiber commonly used in our lives. Its most prominent feature is its good elasticity, and has the advantages of low fineness, large elastic modulus (elongation at break can reach 400%-800%), and small specific gravity. Spandex can be blended with wool, cotton, polyester, acrylic, viscose and other textile fibers to make the fabric soft, elastic and comfortable to wear. It is widely used in fitness clothes, swimsuits, jeans, leggings, underwear, and one-pieces. Among clothing and underwear, spandex fabrics are more popular among women because women’s clothing has higher requirements for close fitting.
For example: Lace fabrics (containing spandex), which women love most, tend to turn yellow after being worn or left for a long time. What is the reason for this?
Because the spandex molecular chain contains a large number of reactive groups such as amino groups, it is easy to turn yellow during high-temperature setting or storage, affecting the quality of finished products, especially fluorescent whitening fabrics and light-colored fabrics. In order to improve the running performance of spandex during spinning, silicone lubricants and other additives are used during the weaving process. These additives naturally degrade over time causing the fibers to turn yellow. In addition, spandex itself is not easy to color, that is, conventional dyes cannot color spandex. Therefore, after the fabric is dyed and the restoration and cleaning are insufficient, the so-called yellowing phenomenon may also occur.
Best-selling black spandex filament – liquid coloring technology
Black spandex is a widely used variety in clothing fabrics. In recent years, domestic black spandex filament production capacity has continued to expand, and product performance has continued to improve. The black spandex filament spun directly through special processes such as dope dyeing or online addition not only has a more uniform and lasting black effect, higher color fastness and excellent washing resistance, but also eliminates the dyeing process of the fiber and reduces the cost. Reduce energy consumption in the dyeing process and reduce environmental pollution.
</p
