Lycra, that is, nylon, spandex. Lycra, to put it bluntly, is just a rubber band added to the fabric to make the fabric elastic. Nowadays, 5%-10% Lycra, that is, spandex, is added to many cotton fabrics. This kind of fabric has a certain degree of elasticity, and the clothes can be tailored to fit more closely, but they are not restrictive and are more comfortable to wear. Elastane is not fabric, it is what fabric is made of!

Polyamide (PA, commonly known as nylon) is a resin first developed for fiber by the American DuPont Company and was industrialized in 1939. In the 1950s, injection molded products began to be developed and produced to replace metal to meet the requirements of lightweight and cost-reducing downstream industrial products. PA has good comprehensive properties, including mechanical properties, heat resistance, wear resistance, chemical resistance and self-lubricating properties. It also has low friction coefficient, certain flame retardancy, easy processing, and is suitable for use with glass fiber and Other fillers are used to enhance the modification, improve performance and expand the scope of application. There are many varieties of PA, including PA6, PA66, PAll, PAl2, PA46, PA610, PA612, PAl010, etc., as well as many new varieties such as semi-aromatic nylon PA6T and special nylon developed in recent years.

Because polyamide is non-toxic, lightweight, has excellent mechanical strength, wear resistance and good corrosion resistance, it is widely used to replace copper and other metals in machinery, chemical industry, instrumentation, automobiles, etc. Bearings, gears, pump blades and other parts are manufactured in industry. Polyamide has high strength after melt spinning into filament. It is mainly used as synthetic fiber and can be used as medical suture.