Duro Marine is chemically treated with permanent preservatives through vacuum pressure impregnation. This process ensures the highest level of bonding and it is so good that it is often used in Cooling Towers.
Prescribed Test | Values for Conformity | Observed Value |
---|---|---|
Moisture content (%) | 5 - 15 | 9 |
Glue shear strength (in dry state) | Min. ind.: 1100N Avg.: 1350N |
1350N 1350N |
Adhesion of ply | Minimum pass standard | Excellent |
Glue shear strength (after 72 hrs. boiling) | Min.: 800N Avg.: 1000N |
1150N 1250N |
Tensile strength - Along the grain - Across the grain |
42N/Sq. mm. 25N/Sq. mm. |
55N/Sq. mm. 39N/Sq. mm. |
Sum of strength | 84.50N/Sq.mm | 94N/Sq.mm. |
Static bending strength Modulus of Rupture - Along the grain - Across the grain Modulus of Elasticity - Along the grain - Across the grain |
50N/Sq. mm. 20N/Sq. mm. 7500N/Sq. mm. 4000N/Sq. mm. |
65N/Sq. mm. 409N/Sq. mm. 8305N/Sq. mm. 4870N/Sq. mm. |
Sizes (in mm) |
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2440 x 1220, 2140 x 1220, 1840 x 1220, 2140 x 920, 1840 x 920. |
Thickness (in mm) |
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4, 6, 9, 12, 16, 19. |
BWR and MR grade plywood
Advantages of Blockboard