EVERYDAY MATERIALSAtlas
Polymers / Elastic fibre based on segmented polyurethane

Elastane / spandex

Elastane, also called spandex, is a manufactured elastic fibre commonly combined with other fibres in clothing. Its job is to extend and recover, while cotton, nylon or polyester can supply much of the fabric’s surface, strength and feel. A small fibre fraction can therefore change the behaviour of a whole garment. LYCRA is one trademark for this fibre class, not its generic chemical name; stretchy fabrics can also obtain movement from their knitted structure or other fibres.

See it in everyday life
JeansDenim panelsBed sheetStretch fabric surface

Useful properties

Why it earns its place

Extension and recovery ↗

The fibre can extend under load and recover after release, helping a fabric move with the wearer.

Fine continuous filaments ↗

Spinning turns a prepared polymer into filaments that can be incorporated into yarns and textile structures.

Care-sensitive performance ↗

The appropriate washing, drying and finishing conditions depend on the fibre grade and complete textile; use the garment’s care instructions.

From input to useful material.

A simplified industrial pathway. Select a stage to learn what changes. Recycled feedstock and other process variants can enter at different stages.

  1. 01 Prepare polymer feedstocks
  2. 02 Build the segmented polymer
  3. 03 Spin and recover solvent
  4. 04 Combine or cover yarns
  5. 05 Weave or knit the fabric

Origins & processing

Elastane production begins with chemical feedstocks that form a segmented polyurethane-based polymer. Flexible portions and more strongly associated portions together create the fibre’s elastic response. In a common solution-spinning route, the prepared polymer passes through small openings and the solvent is removed to leave continuous filaments. Processing then gathers and winds the fine strands. Textile mills combine them with other yarns, sometimes covering an elastic core with cotton or another fibre before weaving or knitting. Fibre manufacture and fabric construction are separate stages, and neither alone specifies a garment’s final fit.

Where it turns up

Stretch denim, fitted sheets, sportswear, hosiery and elastic garment sections are familiar applications. The percentage on a fibre label is only one clue: yarn placement, fabric geometry and finishing also determine how easily the textile stretches and how it recovers. Elastane fibre is a distinct physical form within the wider polyurethane material family.

Useful, with limits.

More stretch is not automatically better recovery, greater durability or a better-fitting garment. The supporting fibres, seams and pattern must work with the elastic yarn. Care requirements belong to the complete textile, so follow its label rather than treating every elastane blend alike. A marketing claim about a particular branded grade cannot establish the behaviour of all spandex fibres.

A next life depends on the system.

A cotton–elastane or polyester–elastane fabric contains different polymers intertwined at fibre scale. That complicates processes designed for a single fibre, and successful separation in research does not establish an available household collection route. Repair and continued use can preserve a garment before recovery is considered. Ask a textile collector whether the actual blend and condition are accepted; do not assume stretchy clothing belongs with plastic packaging.

Choose your next question

Keep the connection going.

Where else is it used?2 objects in this atlas link to elastane / spandex.Where does it come from?Follow the industrial process and its inputs.What happens after use?Return to the whole object and its recovery choices.

Follow the evidence

Original explanations informed by the sources below. Technical and industry sources support material behaviour; industry environmental marketing is not treated as a universal comparison. Browse the source register.