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| Coir ply is an innovative product that uses renewable natural hard fibres such as coir and jute, impregnated with phenolic resin and limited pre-treated plantation timber veneers. The product has been successfully test-marketed in India for years and the response from the Indian market shows that it has been well accepted as an alternative to plywood. |
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The use of coconut fibre (coir) as an alternative raw material to wood for various products is quite sustainable. The high lignin content of coir makes it suitable for producing products of high quality. The process consists of converting the coir into a felt and then into a board in combination with preservative treated rubber wood veneers, bonded together with a boiling water resistant/ proof synthetic resin adhesive.
A coconut harvest occurs once in 45 days. From 1000 coconuts it would be possible to extract 10 kgs of coir. Based on a production of 51.281 million nuts in 1994, this means a coir fibre production of 5 million. Even if only 10 percent of this is utilized in the manufacture of coirply, which would correspond to half a million tones of coir utilisation per year, this would save about 8,80,000 tropical trees per year, which corresponds to 8,800 acres of tropical forests per year. |
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- coir ply has all the properties of phenol-bonded ply with the added strength of fibre reinforced phenol bonding.
- coir ply manufacturing process gives it a natural, smooth, glossy finish on both sides. Can be used without surface treatment.
- coir ply can also be painted, polished or laminated. The board has the lowest consumption rating per square foot, on paints and varnishes.
- coir ply has both vertical and horizontal load bearing strengths. The best compression / strength ratios among phenol- bonded boards.
- coir ply can be form-cut into virtually any shape, with minimum wastage and low labour costs. The board can also be nailed or screwed into place.
- coir ply has high degrees of surface abrasion resistance.
- coir ply does not flake-off dust as in ordinary particle boards and asbestos.
- coir ply Resists contraction/ expansion due to temperature variations.
- coir ply does not absorb water or moisture.
- coir ply is Termite / insect resistant. Also has high fire retardant properties.
- Standard board sizes 2.4m x 1.2m
Thickness options - 4mm, 6mm, 8mm, 12mm, 18mm and 19mm.
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| Coirply is the result of extensive research and product testing done by the Coir Board (Government of India) and Supported by United Nations Development Programme (UNDP),
The World Bank and TIFAC (Department Science and Technology) |
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Coir-ply+ |
Plywood |
M.D.F |
Particle Board |
Tested as per IS. No. |
IS-1734 |
IS-1734 |
IS-2380 |
IS-2380 |
Density (Kg/m3) |
748 |
400-700 |
750-850 |
700-800 |
Moisture (%) |
6.50% |
5-15% |
5-15% |
5-15% |
Glue sheer Strength(N/Sq..mm) |
1720 |
1200-1750 |
N.A |
N.A |
Water resistance (8hrs.boiling) |
No Delamination |
No Delamination |
N.A |
N.A |
Tensile Strength (N/Sq.mm) |
23.6 |
35.55* |
7.0-8.0 |
4.0-4.5 |
Compressive Strength (N/Sq.mm) |
51.02 |
29.34* |
N.A |
N.A |
Modulus Elasticity (N/Sq.mm) |
6440 |
3500-7400* |
N.A |
N.A |
Modulus of Rapture(N/Sq.mm) |
47.5 |
29.49* |
25.28 |
12.5-15.0 |
Nail Holding Power (in kgs.) |
50 |
125 |
N.A |
N.A |
Screw Holdig power (in kgs) |
245 |
300 |
125-150 |
85-125 |
Surface Strength(kg/sq.cm)+A15 |
30 |
N.A |
30 |
30 |
* Figures as per Shuttering plywood |
+All Coir ply test data as per tests carried out by I.P.I.R.T.I
(Indian Plywood Industries Research & Training Institute, Bangalore.) |
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