The short answer: coconut fibre (coir fibre) is the stiff, lignin-rich strand pulled out of the coconut husk. Long, coarse brown fibre goes into brushes, brooms, mattress padding, rubberised coir sheets, twine and erosion-control meshes. Finer white fibre, retted for months before extraction, is spun into yarn for mats, rope and nets. Which use a lot of fibre is fit for comes down to three things a buyer can specify: colour (brown or white), grade (bristle, mattress or mixed) and the moisture and impurity levels in the bale.
The husk is roughly 30 percent fibre and 70 percent pith by dry weight. This article is about the 30 percent. The pith is covered in what coco peat is, and husk chips have their own guide.
Key facts
- A husk from southern India or Sri Lanka yields about 80 to 90 g of fibre. Roughly a third of that is long bristle fibre.
- Fibre strands run 10 to 30 cm, occasionally to 35 cm, and 50 to 450 microns across. Lignin content is high, with figures from the low 30s to the mid 40s percent quoted depending on the test and the fibre.
- Bristle fibre is usually defined as strands of 20 cm (8 in) or more. Mattress fibre is the shorter, finer fraction. Mixed fibre is everything together.
- Bales are typically 100 to 130 kg, pressed and strapped, at 15 to 18 percent moisture.
How the fibre is separated from the husk
There are two routes, and they produce different fibre.
Retting is the old method. Whole or split husks are sunk in brackish backwaters, lagoons or pits and left to ferment. Figures quoted for the soak run from three to six months at the short end to ten months or more for the finest fibre. Micro-organisms break down the soft tissue binding the strands, then the husk is beaten to shake the fibre loose, washed, hackled and dried in shade. Retting is slow and pollutes the water, but it gives a soft, supple, light-coloured strand that spins well.
Mechanical decortication is what most of the brown fibre trade uses now. Husks are soaked for only a few days, often around five. A breaker crushes the husk, then revolving drums beat and comb the strands away from the pith. The fibre is washed, dried, cleaned of dust and baled. Husk to bale can take a week rather than a season.
Why does the method change the fibre? Retting removes more of the binding material, so the strands come apart cleanly and stay flexible. Decortication rips them apart, leaving more pith on the fibre, breaking some long strands and keeping the fibre stiffer. Husk age matters too. A mature husk gives a brown, woody, stiff strand. A green husk gives a paler, finer one.
Brown fibre vs white fibre
| Brown fibre | White fibre | |
|---|---|---|
| Husk used | Fully mature nuts, usually husks left over from copra | Green nuts, roughly 6 to 12 months after flowering |
| Extraction | Mostly mechanical decortication after a short soak | Long retting, then beating and hackling |
| Colour | Golden to dark brown, can be bleached to pale yellow | Cream to light brown |
| Feel | Coarse, stiff, abrasion-resistant | Finer, smoother, more flexible, weaker |
| Main uses | Brushes, brooms, mattress and upholstery padding, rubberised coir, geotextile twine, mulch mats, growing-media blends | Spun yarn for floor mats and matting, rope, cordage, fishing nets |
| Main source | Tamil Nadu (India), Sri Lanka, Vietnam | Kerala (India) |
Brown fibre is the bulk of international trade in loose fibre. White fibre is mostly spun into yarn near where it's produced and exported as yarn or finished mats. If a supplier just says coir fibre, assume brown.
One property that matters for rope and nets: coir tolerates sea water well, and its strength is less affected by soaking than sisal or abaca. That's why white coir rope was the traditional choice for fishing gear.
The grades: bristle, mattress and mixed
Grading is by length and stiffness, not colour. The names come from what each fraction was sold for.
| Grade | Typical length | Character | Typical use |
|---|---|---|---|
| Bristle fibre | Mostly 15 to 30 cm, with 20 cm+ the usual definition | Long, stiff, highest breaking load (roughly 3 to 6.5 N per strand) | Brushes, brooms, heavy twine, liners, growing-media fibre |
| Mattress fibre | Mostly under 12.5 cm, a large share under 5 cm | Short, finer, more elastic, holds a curl | Mattress and upholstery padding, rubberised coir, needle-felt pads, erosion blankets |
| Mixed fibre | Whole range from a decorticator, uncombed | Everything in the husk, more pith and dust | Yarn, twine, geotextile warp, low-value padding, horticulture |
In Sri Lanka you'll also hear one-tie, two-tie and three-tie bristle. One-tie is bristle straight from the defibering machine. Two-tie has been hackled (combed) once to remove short fibre and straighten the strands. Three-tie has been combed again. Each pass raises the share of long, parallel fibre and the price. The short fibre combed out is sold as omat fibre, a medium grade for twine, geotextiles and upholstery.
Tested Sri Lankan fibre shows how different the grades are. By weight, about two thirds of bristle fibre falls between 17.5 and 27.5 cm. For mattress fibre, about 60 percent by weight is under 12.5 cm, and by count well over a third of strands are under 2.5 cm. Mattress fibre has the lowest breaking load per strand but, being thinner, the highest tensile strength per unit of cross-section. It packs and springs well in a mattress but is useless in a broom.
What coconut fibre is used for
Brushes and brooms
Bristle fibre, combed, often dyed black and sometimes "flagged" (ends split) for a softer sweep. It's cut to length, bunched and fixed into wooden or plastic stocks for yard brooms, deck scrubs, masonry and tar brushes and tawashi scrubbers. Coir holds water well and doesn't scratch soft surfaces. Natural coir is the cheap end of the brush trade and crushes more easily than synthetic filament, so the better brushes use two-tie or three-tie fibre.
Ropes, twine and yarn
Fibre is spun, by hand or on motorised units, into two-ply yarn, which becomes rope, netting, tree ties, garden string and the warp for woven mats and meshes. White fibre gives the smoother, stronger yarn. Brown mixed fibre gives a hairier yarn that's fine for geotextile mesh and packaging twine.
Mattresses and upholstery padding
Mattress fibre is layered and needle-felted into pads as a filling or insulator layer in spring mattresses, car seats, sofas and cushions. Coir padding breathes and resists sagging. It's also used loose as packing cushion.
Rubberised coir
This is the highest-value padding product. Fibre is spun into a tight two-ply rope and left to cure so it takes a permanent curl, then untwisted and opened into a springy, curly mass. The curled fibre is laid into a web, sprayed with natural rubber latex (around 60 percent solids), dried, pressed to thickness and vulcanised in heat. The result is a bonded sheet cut for mattress cores, seat pads and car-seat backs. European automotive upholstery has used it for decades. Fibre arriving for this process is typically at 16 to 19 percent moisture and is dried further before latexing.
Geotextiles and erosion control
Brown twine is woven into open meshes of 400, 700 and 900 g/m², and loose mattress or mixed fibre is needle-punched into blankets or stuffed into netting as logs. The high lignin content means they last two to five years in the ground, long enough for vegetation to take over. How these products are specified and installed is covered in the coir erosion control guide.
Mulch mats and weed discs
Fibre is needle-punched or latex-bonded into flat mats and discs that sit around tree bases, in planters or along rows. They block light to suppress weeds, let water through and slowly rot into the soil. Landscaping contractors buy them in bulk, usually with a slit to the centre for the stem.
Growing-media component
Long fibre is chopped short and blended with coco peat and husk chips to add air space and drainage to a substrate, in open-top slabs and container mixes. The fibre is slower to break down than the pith, so it keeps structure through a long crop. If you're buying it for this, ask about washing and salt content the same way you would for pith, because fibre from near-coastal retting can carry chloride.
Horticultural liners and baskets
Bristle or mixed fibre is pressed into shaped liners for hanging baskets, wall planters and window boxes. These sell on appearance as much as function, so colour uniformity and freedom from pith matter more here than for padding.
How fibre is baled and shipped
Dried fibre is pressed hydraulically and bound with steel or polypropylene strapping. Indian and Sri Lankan export bales are generally 100 to 130 kg, with lighter 35 to 50 kg bales for smaller buyers, and some national standards allow 50 to 200 kg. A 40 ft high-cube container typically takes around 20 to 22 tonnes of pressed bales, or roughly 180 to 200 bales at 110 to 120 kg each.
Moisture is the thing that goes wrong in transit. Sun-dried fibre in the tropics settles at 15 to 18 percent moisture. Ship it wetter than that and condensation forms inside the container when it reaches a cold port, leading to mould, discolouration and a musty smell that mattress and brush makers will reject. Ask for the moisture at baling, not at the factory gate.
What a buyer should specify
Buyers and suppliers have traditionally agreed quality by eye, which is where most disputes start. Put these on the purchase order.
| Parameter | What to ask for | Typical figures |
|---|---|---|
| Colour | Brown or white, natural, bleached or dyed | Brown is standard for loose fibre |
| Grade | Bristle (and how many ties), mattress, omat or mixed | Match to end use, see table above |
| Length | Minimum, or a length distribution | Bristle 20 cm+, mattress mostly under 12.5 cm, national standards allow 10 to 35 cm overall |
| Moisture | Maximum at baling | 15 to 18 percent is normal, some buyers specify under 15 |
| Impurities | Pith, dust, husk pieces, foreign matter | Under 2 to 3 percent for good decorticated fibre, up to 6 percent in lower grades, with dust alone under 1 to 3 percent |
| Bale weight | Net weight and tolerance | 100 to 130 kg, strapping type |
| Extraction | Retted or mechanical, husk maturity | Affects colour and stiffness |
| Treatment | Washed, bleached, dyed, flagged, curled, cut to length | Only where the end use needs it |
Ask for a sample from the production lot, not a showroom sample. Pull a handful and measure the longest and shortest strands. For padding, press a wad and see how it springs back. For brushes, bend the strands and count how many break.
Where the fibre comes from
India is the largest producer of coir fibre, at roughly 590,000 tonnes in a recent year, with Vietnam second at around 390,000 and Sri Lanka third at about 160,000 out of a world total near 1.3 million tonnes. Inside India, Kerala produces most of the world's retted white fibre and spins it into yarn and mats, while Tamil Nadu is the main producer of mechanically extracted brown fibre and pith. Sri Lanka is the biggest exporter of loose brown fibre and has the longest-standing grading system for it. Most Indian fibre is used at home, so its export share is smaller than the production figure suggests.
Less than a tenth of the world's husk ever becomes traded fibre. Most is burnt, left in the field or used locally, so supply is limited by processing capacity near the groves rather than by coconuts.
CVM supplies coir bristle fibre alongside its coco peat products, and handles the paperwork for export in the same way. If you're sourcing fibre for brushes, padding or a growing-media blend and want to talk through grade and bale specs, get in touch.
FAQ
Is coconut fibre the same as coir?
Yes. Coir is the trade name for the fibre from the coconut husk, from the Tamil and Malayalam word for cord. "Coco fibre" and "coconut coir fibre" mean the same thing. Coco peat or coir pith is the fine spongy material left over after the fibre is removed, and it's a different product.
What is the difference between brown coir and white coir?
Brown coir comes from mature husks and is mostly extracted mechanically after a short soak. It's coarse, stiff and brown. White coir comes from green husks retted in water for months, and it's finer, paler and more flexible but weaker. Brown goes into brushes, padding and geotextiles. White is spun into yarn for mats and rope.
What is bristle fibre?
Bristle fibre is the long, stiff fraction of coir, usually defined as strands of 20 cm (8 inches) or longer. It has the highest breaking load of the grades and is used for brushes, brooms, heavy twine and horticultural liners. It's sold as one-tie, two-tie or three-tie depending on how many times it has been combed.
What is mattress fibre used for?
Mattress fibre is the short, finer fraction left after the bristle is taken out. It's needle-felted into pads for mattresses, upholstery and car seats, curled and latex-bonded into rubberised coir, and used in erosion-control blankets and logs. It's too short and soft for brushes.
How long should coir fibre be?
Whole fibre from a husk runs about 10 to 30 cm, sometimes to 35 cm. Bristle grade is mostly 15 to 30 cm. Mattress grade is mostly under 12.5 cm with a large share under 5 cm. For growing-media blends the fibre is chopped short so it mixes evenly with the pith.
What moisture content should baled coir fibre have?
Sun-dried fibre settles at 15 to 18 percent moisture, and that's what most export specifications are built around. Some buyers ask for under 15 percent. Higher moisture leads to condensation, mould and discolouration in the container, especially on voyages to cold climates.
Does coconut fibre rot?
Slowly. Coir has one of the highest lignin contents of any plant fibre, so it lasts far longer than jute or straw when wet or buried. Erosion-control products are quoted at two to five years in the ground. Indoors and dry, brushes, mats and padding last for many years.
Which countries export coconut fibre?
India is the largest producer but uses most of its fibre at home. Sri Lanka is the largest exporter of loose brown fibre, and Vietnam has become a big producer. Indonesia and the Philippines have large husk supplies but process relatively little of it. Thailand and Ghana are smaller suppliers.