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Is spandex an elastomeric yarn?

Spandex is a synthetic elastomeric yarn that is commonly used in apparel and other textiles. The spandex fiber has a high tensile strength, high elasticity, and excellent stretch recovery. It is made from polyoxymethylen (POM) and polyethylene terephthalate (PET) fibers.

How do you make spandex yarn?

Spandex fibers are produced in four different ways including melt extrusion, reaction spinning, solution dry spinning, and solution wet spinning. Each of these methods involve the initial step of reacting monomers to produce a prepolymer. Then the prepolymer is reacted further, in various ways, and drawn out to produce a long fiber. Since solution dry spinning is used to produce over 90% of the world’s spandex fibers, it is described.

spandex yarn
filament yarn

Is spandex a filament yarn?

Spandex yarns are produced as a filament yarn, meaning the fiber is continuous and with very large percentage of elongation and recovery. Spandex yarns are sold using the unit of measures of denier or decitex. The common deniers for spandex yarns range from 10 denier to 1,680 denier. At one point, some manufacturers of spandex made a denier past 5,000 denier.

What kind of yarn is spandex?

Spandex is a lightweight synthetic fiber used to make stretchable garments such as sportswear. It consists of long-chain polymers called polyurethanes, produced by reacting polyesters with diisocyanates. The polymer is converted into fibers using dry spinning technology. Spandex was originally produced in the early 1950s and was originally developed as a replacement for rubber. Although the market for spandex is still relatively small compared to other fibers.

spandex filament yarn


Spandex is a synthetic polymer. Chemically, it consists of a combination of long-chain polyethylene glycols and short diisocyanates, and contains at least 85% polyurethane. It’s an elastomer, which means it stretches to a certain point and bounces back when released. These fibers are superior to rubber because they are stronger, lighter and more versatile. In fact, spandex fibers can be stretched to almost 500% of their length.

A spinning process in which spandex yarn is covered with a sheath of staple fibers to produce stretchable spun yarn. The current product type Spandex is suitable for core spinning applications and all types of accessories are available on the market.

Spandex fibers are produced in four ways: melt extrusion, reactive spinning, solution dry spinning, and solution wet spinning. All of these methods include an initial step of reacting the monomers to produce a prepolymer. Once the prepolymer is formed, it is further reacted in various ways and drawn out to make fibers.

The inner component is a core made of continuous filament yarn (usually spandex), and an outer spun yarn sheath covering the yarn core. The use of spandex as the core imparts sought-after properties such as stretchability, durability, better resistance to breakage, and more.

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