TextileGlossary.com

What is "Coir" - Definition & Explanation

Coir is a coarse fibre extracted from the fibrous outer shell of a coconut.
Coir (from Malayalam kayaru - cord) is a coarse fibre extracted from husk, the fibrous outer shell of a coconut.
Structure
The individual fibre cells are narrow and hollow, with thick walls made of cellulose. They are pale when immature but later become hardened and yellowed as a layer of lignin, is deposited on their walls. Mature brown coir fibres contain more lignin and less cellulose than fibres such as flax and cotton and so are stronger but less flexible. They are made up of small threads, each less than 0.05 inch (1.3 mm) long and 10 to 20 micrometres in diameter. White fibre is smoother and finer, but also weaker.

The coir fibre is relatively water-proof and is the only natural fibre resistant to damage by salt water.
Processing
Green coconuts, harvested after about six to twelve months on the plant, contain pliable white fibres. Brown fibre is obtained by harvesting fully mature coconuts when the nutritious layer surrounding the seed is ready to be processed into copra and desiccated coconut. The fibrous layer of the fruit is then separated from the hard shell (manually) by driving the fruit down onto a spike to split it(De-husking). Machines are now available which crush the whole fruit to give the loose fibres.
Brown fibre: The fibrous husks are soaked in pits or in nets in a slow moving body of water to swell and soften the fibres. The long bristle fibres are separated from the shorter mattress fibres underneath the skin of the nut, a process known as wet-milling. The mattress fibres are sifted to remove dirt and other rubbish, dried and packed into bales. Some mattress fibre is allowed to retain more moisture so that it retains its elasticity for 'twisted' fibre production. The coir fibre is elastic enough to twist without breaking and it holds a curl as though permanently waved. Twisting is done by simply making a rope of the hank of fibre and twisting it using a machine or by hand. The longer bristle fibre is washed in clean water and then dried before being tied into bundles or hunks. It may then be cleaned and 'hackled' by steel combs to straighten the fibres and remove any shorter fibre pieces. Coir bristle fibre can also be bleached and dyed to obtain hanks of different colours.
White fibre: The immature husks are suspended in a river or water-filled pit for up to ten months. During this time micro-organisms break down the plant tissues surrounding the fibres to loosen them - a process known as retting. Segments of the husk are then beaten by hand to separate out the long fibres which are subsequently dried and cleaned. Cleaned fibre is ready for spinning into yarn using a simple one-handed system or a spinning wheel.
Uses
Brown coir is used in brushes, doormats, mattresses and sacking. A small amount is also made into twine. Pads of curled brown coir fibre, made by needle-felting (a machine technique that mats the fibres together) are shaped and cut to fill mattresses and for use in erosion control on river banks and hillsides. A major proportion of brown coir pads are sprayed with rubber latex which bonds the fibres together (rubberized coir) to be used as upholstery padding for the automobile industry in Europe. The material is also used for insulation and packaging. The major use of white coir is in rope manufacture. Mats of woven coir fibre are made from the finer grades of bristle and white fibre using hand or mechanical looms.
Coir is recommended as substitute for milled peat moss because it is free of bacteria and fungal spores.
Major producers
Total world coir fibre production is 250,000 tonnes. The coir fibre industry is particularly important in some areas of the developing world. India, mainly the coastal region of Kerala State, produces 60% of the total world supply of white coir fibre. Sri Lanka produces 36% of the total world brown fibre output. Over 50% of the coir fibre produced annually throughout the world is consumed in the countries of origin, mainly India.

The fibers obtained from the husk of a coconut, used for making rope.
Fibrous material derived from the outer husk of the coconut; used as an environmentally friendly replacement for peat in potting composts but usually less easy to manage. Sometimes known as coconut fibre.
A natural vegetable based fibre derived from the coconut.
stiff coarse fiber from the outer husk of a coconut.

Some other terms

Some more terms:

A corset is a garment worn to mold the torso into a desired shape for aesthetic or orthopaedic purposes (either for the duration of wearing it, or with a more lasting effect). Both men and women have...
Made from wool, cotton, linen, silk, rayon, or synthetics. In a basket weave. Monk’s cloth is heavy due to its construction. It is difficult to sew or manipulate as the yarns have a tendency to...
Heavily fulled twill wool cotton that resembles the animal of that name. Has softer body and longer nap than kersey and melton. If term is used, it must be referred to as imitation beaver cloth to...
The removal of dye from a fabric by rubbing. Crocking can be caused by insufficient dye penetration or fixation, the use of improper dyes or dyeing methods, or insufficient washing and treatment...
Two or more yarns (at least one of which is folded) (see yarn, doubled) that have been twisted together in one or more operations. NOTE: a) Combinations of folded yarns and single yarns may be...

Companies for Coir:


If you manufacture, distribute or otherwise deal in Coir, please fill your company details below so that we can list our company for FREE!

Add a definition

Add a definition for a textile term that you know about! Send us an email & tell us:
  • The term you want to define
  • Its definition in 500 words or less
  • Attach an image if necessary.
  • Optionally, tell us about yourself in 200 words or less!

(s) 2017 TextileGlossary.com Some rights reserved. • Sitemap