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What is twisted coir fibre?

Coir glossary · Updated 2026-09-25 · Also in Português →

Coir fiber spun into double-twisted rope, steamed and later untwisted, which leaves it permanently curled and springy. It is the raw material of rubberized coir (coir bonded with latex) used in mattresses, upholstery and seats.

Twisted coir fibre: how it is made.

In the process described by the Rubber Research Institute of Sri Lanka (RRISL), coconut fiber is spun into rope with a double twist, which gives it a tight curl. The ropes are steamed in an autoclave, which stabilizes the curl and adds elasticity, then passed through an untwisting machine that yields loose, curled fiber. Results improve the longer the rope rests before untwisting.

To make rubberized coir, a web of curled fiber is sprayed with compounded latex on both faces and dried at 60–70 °C; the sheets are stacked, hot-pressed to thickness and vulcanized at about 120 °C for roughly one and a half hours (RRISL). Embrapa lists rubberized coconut fiber among the materials for spring mattresses, car upholstery and cushions.

Twisted coir fibre: equivalents.

PT: fibra torcida · ES: fibra de coco rizada

Sources: RRISL · Embrapa. Definition from the Carve coir glossary, where the full source list is given.

Related terms.

Mattress fiber / short fiber: Shorter fiber fraction (typically 2–10 cm) separated during mechanical processing.

Bristle fiber: Longer, stiffer fibers extracted from the outer mesocarp of mature coconut husk.

Coir fiber: Fibers mechanically extracted from the mesocarp of mature coconut.

See also: Mattress coir fibre · Coir Fiber for Needle-Punch Mattress Pads · back to the coir glossary.

Sources.

  1. Rubber Research Institute of Sri Lanka. Manufacture of Rubberized Coir Mattresses. Agalawatta: RRISL. www.rrisl.gov.lk/content/files/downDoc/8.%20Manufacture%20of%20Rubberized%20Coir%20Matresses.pdf
  2. Correia, M. U. Fibra de coco na indústria (Coconut fiber in industry). In: Embrapa. Agência Embrapa de Informação Tecnológica — Coconut. Brasília: Embrapa. www.agencia.cnptia.embrapa.br/gestor/coco/arvore/CONT000gm3gfso502wx5ok0f7mv209jae397.html
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About this page. Part of the coir glossary maintained by Carve Biorrefinaria Agroindustrial Ltda, a coir pith and fiber producer in Paraipaba, Ceará, Brazil. Corrections: comercial@carvebio.com.br.