Reducing resin content and board density without adversely affecting the mechanical properties of particleboard through controlling particle size  

作　　者：Mohammad Arabi Mehdi Faezipour Heydar Gholizadeh 

机构地区：[1]Department of Wood & Paper Science and Technology, Faculty of Nat- ural Resources, University of Tehran, P.O. Box 4111, Karaj 31587-77871, Iran [2]Department of Agricultural Economics, College of Agriculture and Natural Resources, University of Tehran, Karaj 31587-77871, Iran

出　　处：《Journal of Forestry Research》2011年第4期659-664,共6页林业研究（英文版）

摘　　要：Density and resin content are two factors that have a significant effect on the production cost of wood composite. However, particle size affects resin content and density, which suggests that the interaction of these three factors can be manipulated to reduce the board density and resin content of particleboard without adversely influencing its mechanical properties. Some mathematical functional forms based on resin content, board density and slenderness ratio were regressed and an appropriate form was chosen. According to analysis of the results using SHAZAM 9 software, the exponential function best fit the experimental data. Finally, ＂indifference curves＂ of mechanical properties were illustrated and analyzed. The results indicated that negative effects of density or resin content reduction on mechanical properties could be compensated for by controlling particles＇ slenderness ratio. Interestingly, increases in slenderness ratio compensated for the negative effects of decreases in resin content or board density on module of rupture （MOR） and module of elasticity （MOE）. Moreover, this ＂compensation ratio＂ intensified as resin content or density decreased and/or as the MOR or MOE increased. On the other hand, reduction in slenderness ratio indicated a comple- mentary effect on reducing internal bond （IB） strength, a result of decreases in resin content or density. Moreover, this ＂complementary ratio＂ was intensified as resin content or density decreased and/or as IB strength increased.Density and resin content are two factors that have a significant effect on the production cost of wood composite. However, particle size affects resin content and density, which suggests that the interaction of these three factors can be manipulated to reduce the board density and resin content of particleboard without adversely influencing its mechanical properties. Some mathematical functional forms based on resin content, board density and slenderness ratio were regressed and an appropriate form was chosen. According to analysis of the results using SHAZAM 9 software, the exponential function best fit the experimental data. Finally, ＂indifference curves＂ of mechanical properties were illustrated and analyzed. The results indicated that negative effects of density or resin content reduction on mechanical properties could be compensated for by controlling particles＇ slenderness ratio. Interestingly, increases in slenderness ratio compensated for the negative effects of decreases in resin content or board density on module of rupture （MOR） and module of elasticity （MOE）. Moreover, this ＂compensation ratio＂ intensified as resin content or density decreased and/or as the MOR or MOE increased. On the other hand, reduction in slenderness ratio indicated a comple- mentary effect on reducing internal bond （IB） strength, a result of decreases in resin content or density. Moreover, this ＂complementary ratio＂ was intensified as resin content or density decreased and/or as IB strength increased.

关 键 词：mechanical properties board density resin content slender-ness ratio partieleboard. 

分 类 号：TS653.5[轻工技术与工程]