(Double Core)
Prince Block Boards are available in a moisture resistant & boiling water proof grade, bonded with Melamine Ultra Formaldehyde & Phenol Formaldehyde Synthetic Resin respectively. It is a premium quality board with high resistant properties against borer and termite attacks, Face Veneer, Core veneer & wooden battens are well graded for their quality by supervisors. The wooden battens are thoroughly seasoned in scientifically run seasoning kiln plants to control and equalize moisture in battens to get better bonding.
Battens are systematically arranged with the support of frames and utmost care is taken to avoid any extra gap between the battens. Regular tests are conducted in a modern laboratory to maintain the quality of block boards as per ISl standards.
| TECHNICAL SPECIFICATIONS (IS: 1659) | |||
| Sr. No. | TEST | ISI REQUIREMENT | Observed Value |
| 1 | Dimensional Changes Caused | ||
| By Humidity | |||
| a. | Changes, mm | ||
| From 65% Rh To 90% RH | + 1mm Max. | + 0.50 mm | |
| From 65% Rh To 40% RH | - 1mm Max. | - 0.55 mm | |
| b. | Local Planeness | < 1/150 | < 1/175 |
| c. | At The Extreme Range of | No De-lamination At The | No De-lamination |
| Humidity | Extreme Range of Humidity | Observed | |
| 2 | Adhesion of The Plies | Minimum Pass Standard | Excellent |
| 3 | Resistance to Water | No De-lamination After 72 | No De-lamination |
| (72 Hours Boiling) | Hours Boiling | ||
| 4 | Resistance to Micro | No Appreciable Sign of | No Separation |
| Organisms | Separation At Edges. | At Edges | |
| 5 | Modulus of Elasticity | Min. 5000 N / sq. mm | 6050 N / sq. mm |
| 6 | Modulus of Rupture | Min. 50 N / sq. mm | 61 N / sq. mm |