home Wood Based Panels MDF Lamination Grade
Dongwha Lamination Grade MDF is made from high ratio of tropical hardwood species. This is to minimize surface defect during the lamination process. As such the color is darker than the normal MDF due to the higher usage of tropical species of wood. And due to this factor, the board property is stronger than the general MDF.
<Physical & Mechanical Properties of Fibreboard>
Mechanical Properties |
Test Method |
Unit | ≥ 2.5 - 4.0 |
> 4.0 - 6.0 |
> 6.0 - 9.0 |
> 9.0 - 12.0 |
> 12.0 - 19.0 |
> 19.0 - 30.0 |
---|---|---|---|---|---|---|---|---|
Thickness tolerance | BS EN 324-1 |
mm | ±0.2 | |||||
Size tolerance (length & width) |
BS EN 324-1 |
mm | a) within 5mm (length) & within 2mm (width) for free trim panel b) +2 mm (width) and + 5mm (length) for nett size panel |
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Squareness | BS EN 324-2 |
mm/m | <1.5 | |||||
Squareness (diagonal) |
BS EN 324-2 |
mm | < 5 | |||||
Average density | BS EN 323 |
kg/㎥ | 800-860 | 780-840 | 760-800 | 720-760 | 700-740 | 650-690 |
Board moisture | BS EN 322 |
% | 5-8 | |||||
Modulus of Rupture | BS EN 310 |
N/㎟ Ave |
23 | 23 | 23 | 22 | 20 | 18 |
Modulus of elasticity in bending |
BS EN 310 |
N/㎟ Ave |
NA | 2700 | 2700 | 2500 | 2200 | 2100 |
Internal bond (dry) | BS EN 319 |
N/㎟ Ave |
0.65 | 0.65 | 0.65 | 0.60 | 0.55 | 0.55 |
Screw holding Face | BS EN 320 |
N/㎟ Ave |
NA | NA | NA | NA | 1050 | 1000 |
Screw holding Edge | BS EN 320 |
N Ave |
NA | NA | NA | NA | 850 | 700 |
Thickness swelling (24hr) |
BS EN 317 |
% Max |
35 | 30 | 17 | 15 | 12 | 10 |
<Formaldehyde Emission of Fibreboard>
Properties | Test Method / Unit |
Classification | MDF | MDF LF |
MDF LG |
MDF MR |
MFB |
---|---|---|---|---|---|---|---|
Desiccators Method | JIS A 1460 mg/L |
F**** Ave ≤ 0.3 Max ≤0.4 |
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F***(E0) Ave ≤ 0.5 Max ≤0.7 |
√ | √ | √ | √ | √ | ||
F** Ave ≤1.5. Max ≤2.1 |
√ | √ | √ | √ | √ | ||
CARB (Small Chamber Method) |
ASTM D 6007 ppm |
Phase 2 MDF Thin Board < 8mm < 0.13 |
√ | √ | √ | √ | √ |
Phase 2 MDF Thick Board > 8.1mm < 0.11 |
√ | √ | √ | √ | √ |
- NOTES :The perforator values in this table apply to panels with moisture contents of 6.5%