Official Journal of the Japan Wood Research Society
Table 2 Some physical properties of three-layer MDF panels
MDF code (wt% of resin of core)/target density: kg/m3) | Density (kg/m3) | Equilibrium moisture content (%) | Thickness swelling (24 h) (%) | Dimensional changes in with relative humidity at 20 °C | |||
|---|---|---|---|---|---|---|---|
Relative humidity (65 to 30% at 20 °C) | Relative humidity (65 to 85% at 20 °C) | ||||||
LC65 to 30 (%) | TSh65 to 30 (%) | LE65 to 85 (%) | TS65 to 85 (%) | ||||
A (10.5)/(700) | 696 (21)a | 7.61 (0.95)a | 34.2 (1.8)ae | 0.15 (0.01)af | 2.36 (0.2)ad | 0.14 (0.02)ae | 2.25 (0.2)a |
B (9.5)/(700) | 698 (17)a | 7.60 (0.84)a | 36.7 (2.4)ab | 0.18 (0.03)ae | 2.85 (0.2)ab | 0.17 (0.03)ab | 2.54 (0.3)ab |
C (8.5)/(700) | 695 (13)a | 7.63 (0.75)a | 40.8 (3.0)bc | 0.22 (0.02)be | 3.15 (0.4)b | 0.19 (0.02)b | 3.01 (0.4)b |
D (7.5)/(700) | 697 (20)a | 7.61 (0.86)a | 43.4 (2.7)cd | 0.27 (0.03)c | 3.94 (0.3)c | 0.25 (0.03)c | 3.78 (0.2)c |
E (6.5)/(700) | 700 (24)a | 7.62 (0.90)a | 49.2 (3.2)d | 0.33 (0.04)d | 4.36 (0.5)c | 0.30 (0.04)d | 4.20 (0.3)d |
F (10.5)/(730) | 728 (26)b | 7.62 (0.77)a | 37.8 (2.0)ab | 0.19 (0.02)e | 2.94 (0.3)ab | 0.17 (0.01)ab | 2.90 (0.4)ab |
G (10.5)/(700) | 696 (21)a | 7.60 (0.84)a | 34.2 (1.8)ae | 0.15 (0.01)a | 2.36 (0.2)ad | 0.14 (0.02)ae | 2.25 (0.2)a |
H (10.5)/(675) | 675 (17)c | 7.61 (0.79)a | 32.7 (1.5)ae | 0.13 (0.02)f | 2.11 (0.1)d | 0.11 (0.01)ef | 2.01 (0.2)e |
I (10.5)/(650) | 651 (19)d | 7.63 (0.83)a | 31.4 (3.4)e | 0.12 (0.01)f | 1.95 (0.2)d | 0.09 (0.02)f | 1.84 (0.1)e |