Lycra fiber generally refers to spandex. Spandex is the abbreviation of polyurethane fiber, which is an elastic fiber. Chinese mainland is called "spandex", which has high elasticity and can be stretched by 6 ~ 7 times, but it can recover quickly with the disappearance of tension. Its molecular structure is chain-like, soft and malleable polyurethane, and its characteristics are enhanced by connecting with hard segments.

Elastic fibers are divided into two categories: one is polyester chain; One is polyether chain. Polyester elastic fiber has strong oxidation resistance and oil resistance; Polyether elastic fiber has good mildew resistance and detergent resistance.

Extended data:

Spandex can be used in garments that can be stretched to meet comfort requirements. Such as: professional sportswear, fitness clothes and sportswear, diving suits, swimming suits, swimsuits for competitions, basketball suits, bras and suspenders, ski pants, discos, jeans, casual pants, socks, leggings, diapers, tights, belts, underwear, jumpsuits and spandex underwear.

Spandex can also be used for male ballet dancers, surgical protective clothing, protective clothing for logistics troops, riding short sleeves, wrestling vests, rowing clothes, underwear, performance clothes, qualitative clothes and so on. Such as: bra, home decoration, bead pillow.

The proportion of spandex used in ordinary clothes is very small. In North America, it is rarely used in men's wear, but more used in women's wear. Because women's clothing requires close fitting. When in use, a large number of other fibers, such as cotton and polyester blends, are added to minimize the gloss.

Baidu encyclopedia-spandex