IS:1659
Plywood
Gupta Agro Co. Block boards are stable firm and strong enough to cope with the requirements of tough interior and exterior needs. These block boards are available in MR and BWP grade bonded with superior grade condensed Phenol Formaldehyde (PF) synthetic resin (as per IS: 848:1974).
It is formulated by resin, which on being poisoned by specific chemicals makes the board resistant to termite and other wood destroying elements.
You can also ask for the 7 Layers & 9 Layers BLACK CLUB block board with alternate combinations of core veneers. This structure renders better strength properties and balanced construction, making the BLACK CLUBblock board much superior than any other ordinary block.
TECHNICAL DETAILS (IS : 1659)
| PROPERTY | REQUIREMENT | RESULT |
| Moisture Content | 5-15% | 6-10% |
| Change caused by Humidity | Not more than + 1 mm | Less than 0.6 mm |
| Adhesion of Plies | Excellent | Excellent |
| Water Resistant | 3 hrs. at 600C+20C 72 hrs. at 1000C |
More than 12 hrs. at 80C |
| Mycological Test | 1 cycle of 21 days | Can under go 3 cycles of 21 days each without any edge separation |
|
Modulus of Rupture Average Min. Individual |
40 / 50 N/mm2 34 / 42 N/mm2 |
45 / 55 N/mm2 42 / 48 N/mm2 |
|
Modulus of Elasticity Average Min. Individual |
4000 / 5000 N/mm2 3400 / 4200 N/mm2 |
4500 / 5500 N/mm2 4200 / 4800 N/mm2 |
