Coir

Category Type Material
Fibers Vegetable Fibers

show all Fibers types

 Banana fiber
Coir
Cotton
Felt
Flax
Hemp
Jute
Ramie
Sisal
Starch

Data Table for: Fibers: Vegetable Fibers: Coir

Mechanical Properties

Quantity Value Unit
Young's modulus 4000 - 5000 MPa
Tensile strength 140 - 150 MPa
Elongation 15 - 17.3 %

Physical Properties

Quantity Value Unit
Thermal conductivity 0.047 - 0.047 W/m.K
Density 1.15 - 1.33 kg/m3
Water absorption 10 - 0 %

Environmental Data

Quantity Value Unit
Environmental remarks Coir fiber is produced in India, Sri Lanka and Thailand. The coconut palm yields fruit about five years after planting, with full bearing in 10 years time, untill a palm age of 70 years. On average one palm produces 30 coconuts every year. Fibers are gained from coconut husks. Approximately 40-50% of a mature husk consists of fibers. Some pesticides and fertilisers are applied on coconut fields. Coconut palms cause no soil erosion. After harvesting, the retting process takes place for gaining white fibres. The nuts are retted in water pits for about 8 to 10 months. During retting the water is polluted with organic substances, which causes depletion.
Author: Idemat 2003, Design for Sustainability, Delft University of Technology

General

     
Synonyms Coconut fiber
Remarks This fruit fiber is contained in the husk of coconuts. Fiber length ranging from 10-30 cm. Coir fibers are ligth in weight, strong and elastic and have a low lightresistance and a high durability ( because of the fibre composition; 35-45% cellulose, 40-45 % lignine and 2.7-4% pectins and 0.15-0.25 % hemicelluloses).

Several kinds of coir fibers can be distinguished, based on the type of raw material or kind of extraction method. Here, the distinction is made between white, green and brown coir fibers; White fiber is considered to be superior by colour and quality and gained by the most traditional extraction method: no machines are used, extraction by retting and handbeating. Green fibers are gained by mechanical fiber extraction and the quality of green fibers is slightly inferior to white fibers. The brown fiber is inferior of quality and also gained by mechanical extraction.

Sample: Vegetable Fibers

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