Spandex is a commonly used fiber variety in our daily lives, with the most prominent feature being good elasticity, low fineness, high elastic modulus (up to 400% -800% elongation at break), and low specific gravity.

Spandex can be blended with textile fibers such as wool, cotton, polyester, acrylic, and viscose to create fabrics that are soft, elastic, and comfortable to wear. They are widely used in fitness wear, swimwear, jeans, leggings, underwear, jumpsuits, and underwear. Due to the high demand for a snug fit in women's clothing, spandex fabric is more favored by women.

For example, in lace fabrics (including spandex) that women love the most, wearing or placing them for a long time can easily cause yellowing. What is the reason for this?

Due to the presence of a large number of reactive groups such as amino groups on the molecular chain of spandex, it is prone to yellowing during high-temperature setting or storage, which affects the quality of finished products, especially fluorescent whitening fabrics and light colored fabrics.

Due to the use of silicone oil lubricants and other additives in the weaving process of spandex to improve its spinning performance. These additives will naturally degrade over time, causing the fibers to turn yellow. In addition, spandex itself is not easy to color, which means that conventional dyes cannot color spandex. Therefore, in the case of insufficient restoration and cleaning after fabric dyeing, the so-called yellowing phenomenon may also occur.

Bestselling black spandex filament - original coloring technology.

Black spandex is a widely used variety in clothing fabrics. The black spandex filament spun directly through special processes such as original liquid coloring or online addition not only has a more uniform and durable black effect, higher color fastness, and excellent washing resistance, but also eliminates the fiber dyeing process, reduces energy consumption during the dyeing process, and minimizes environmental pollution.