Spandex Yarn: The Secret and Application of Elastic Fiber

In the textile industry, spandex yarn has become an important raw material for many functional textiles with its elasticity and recovery performance. Spandex, also known as spandex, is a polyurethane fiber, also known as spandex elastic fiber, and its English name is widely accepted and used worldwide.

The reason why spandex yarn is widely favored is mainly due to its unique physical and chemical properties. Spandex fiber has extremely high elasticity, with an elongation of 500% to 600%, and can quickly return to its original state after the external force disappears, with an instantaneous elastic recovery rate of more than 99%. This means that textiles made of spandex can fit the curves of the human body closely, providing excellent comfort and freedom.

The linear density of spandex fiber is low, and the finest can reach 11dtex, which is much lower than traditional elastic materials such as rubber yarn, making textiles lighter and softer. In addition, spandex also has good heat resistance, weather resistance, flex resistance and wear resistance, and can maintain stable performance in a variety of harsh environments.

The production process of spandex yarn involves complex chemical and physical processes. Generally speaking, spandex fiber is made by melt spinning. Polyurethane resin is dissolved in a solvent to form a spinning solution. Then, the solution is extruded through a spinning nozzle and stretched and solidified at high temperature to form continuous spandex fiber. Finally, the fiber is curled, twisted and ply-coated to obtain spandex yarn with specific elasticity and strength.

During the production process, factors such as the selection of raw materials, spinning process, stretch multiple and heat treatment conditions will affect the performance of spandex fiber. Therefore, manufacturers need to strictly control production parameters to ensure product quality and stability.

Spandex Yarn has been widely used in many fields such as clothing, sports equipment, and medical supplies due to its elastic properties. In the field of clothing, spandex yarn is often used to make tights, sportswear, swimsuits, stockings and other products that require high elasticity and fit. In addition, spandex can also be blended with other fibers to improve the elasticity and comfort of the fabric.

In terms of sports equipment, spandex yarn is used to make fitness equipment such as yoga mats and resistance bands, as well as outdoor sports equipment such as ski suits and mountaineering suits. These products not only have excellent elasticity, but also maintain good performance in cold or humid environments.

In the field of medical supplies, spandex yarn is used to make medical supplies such as bandages and surgical gowns. These products need to have good breathability and elasticity to adapt to the patient's physical changes and activity needs.