Investigation On Medium Density Fiberboard (MDF) Properties Produced From Horn Beam Wood
2007
Kargarfard, A., Scientific Boards Member of Wood and Paper Science Research Division , Research Institute of Forests and Rangelands | Nourbakhsh, A., Scientific Boards Member of Wood and Paper Science Research Division , Research Institute of Forests and Rangelands | Hosseinkhani, H., Scientific Boards Member of Wood and Paper Science Research Division , Research Institute of Forests and Rangelands
In this investigation, horn beam (Carpinus betulus) wood for medium density fiberboard (MDF) production and determining of mechanical and physical properties of boards have been studied. variables factors were steaming time in three levels (5, 10 and 15 minutes), press time in two levels (4 and 6 minutes) and resin content in two levels (9 and 11 percent). The results of this study indicated that,the highest bending strength (MOR), were observed on MDF boards produced for 5 and 15 minutes steaming time,and boards made for 10 minutes steaming time had the lowest of MOR strength.However the maximum and minimum modulus of elasticity (MOE) achived with fibers obtained under 5 and 15 minetes steaming time condition , respectively.In all conditions, increasing resin consumption was to improve MOR and MOE of the boards. The results also showed that the maximum internal bonding (IB), were related to MDF boards produced with fibers obtain under 15 minutes steaming time condition .However increasing of press time didnot affect on IB significantly. Thickness swelling (T.S) after 2 and 24 hours soaking in water of boards had inverse relationship with IB. Also the lowest T.S related to boards produced with fibers which obtained under 15 minetes steaming time and 11% resin consumption condition.
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