الفهرس 
IntroductionOnly 14 pages are availabe for public view
 |  | from | 128 |  |  |
| | | from | 128 | | |
Abstract
The main experiments were carried out through the year of 2020 at a private work shop in Zagazig city, Sharkia Governorate. The main objective of the present investigation was to investigate the potential of using agricultural residues as a raw material for producing different types of compressed wood taking into consideration the final product quality. To fulfill the objective of this research, experiments were conducted to study the effect of some operating parameters on the production processes of the pressed wood. These parameters are: three different agricultural residues mixtures (A) (Wood saw dust + Linen sass + Rice straw), (B) (Wood saw dust + Linen sass + Corn stalks) and (C) (Wood saw dust + Linen sass + Cotton stalks), four different pressing pressures (1, 3, 5 and 7 MPa), four different pressing times (5, 10, 15 and 20 min) and two different types of resin (Urea formaldehydes and Speria formaldehydes). The manufactured pressed wood samples were evaluated taking into consideration physical properties (Density, thickness swelling and water absorption) and mechanical properties (Modulus of rupture, modulus of elasticity and internal bond strength) as well as the final pressed wood quality. The obtained data reveal that the final pressed wood quality was in the optimum region under conditions of 5 MPa pressing pressure, 15 min pressing time with the use urea formaldehyde resin The findings also illustrated that low density particleboards (PB) could be produced from the three used mixtures (A), (B) and (C), while medium density fiberboards (MDF) could be produced from mixtures (B) and (C). High density fiberboards (HDF) could be produced only from mixture (B).