y adjusting the polymerization process formula, the spandex filament has high heat-resistant resilience and stress, thus ensuring that the spandex filament has good weaving performance. At the same time, it has better evenness, which can meet the usage requirements of high-elasticity warp-knitted plain fabrics and high-density weft-knitted fabrics.

Through a special process, the dyeing disadvantages of traditional spandex in acid dyes are overcome, and the dyeability of spandex in acid dyes is optimized. No spandex coloring agent is needed, and the color is rich and uniform. When this type of spandex is interwoven with nylon, it can improve the "whiteness exposure" on the fabric surface and prevent the phenomenon of competitive dyeing.

A special process is adopted to overcome the problem of rapid decline in strength and elastic recovery rate of spandex in a chlorine environment. The chlorine resistance is increased by 10 times. In a high - concentration chlorine environment, the breaking strength retention rate is 53.5%, and the strength retention rate at 300% elongation is 64.5%. At the same time, it can make the fabric have uniform evenness, and be resistant to high temperature and static electricity.

Process optimization has been carried out for applications such as seamless underwear and high - density mesh cloth, which can improve the performance of such products. This product can maintain good evenness, unwinding tension and the difference between the inner and outer layers of the silk tube under various specification conditions.

Through process modification, the required temperature for spandex setting is reduced. Developed for nylon-spandex fabrics, it can effectively improve the setting fault tolerance. The required setting temperature is 8-10℃ lower than that of conventional spandex. It also has advantages such as better dyeing performance than conventional spandex, fast rebound speed, less tendency of fabric edge curling, and uniform evenness.

Adopting continuous polymerization and dry spinning process technology, it features uniform evenness and stable quality. The products are divided into semi-dull and natural white filaments, and their performance can be adjusted according to different customer needs.