%0 Research article
%T Effect of compression wood on dimensional stability of medium density fiberboard
%A Ayrilmis, Nadir
%D 2008
%J Silva Fennica
%V 42
%N 2
%R doi:10.14214/sf.257
%U https://silvafennica.fi/article/257
%X This study evaluated the effect of compression wood on dimensional  stability of medium density fiberboards (MDF) manufactured from fiber  furnishes of pine (Pinus nigra Arnold var. pallasiana) containing  compression wood. Two panel types were manufactured from two different  compression wood (CW) portion / normal wood (NW) portions in the  furnish, 75/25 and 10/90, respectively. Linear and thickness variations  of the panels exposed to various relative humidites at 20 °C, linear  expansion/contraction and thickness swelling/shrinkage, were measured  according to the procedures defined by DIN EN 318 (2005) standard test  method. Panels made from fiber furnish containing 75% the CW had higher  linear expansion and linear contraction values with an average value of  0.286% and 0.247% than those of panels made from fiber furnish  containing 10% the CW with an average value of 0.184% and 0.152%,  respectively. As for thickness swelling and thickness shrinkage  properties, panels made from fiber furnish containing 75% the CW had the  thickness swelling and thickness shrinkage values with an average of  5.042% and 4.402% while panels made from fiber furnish containing 10%  the CW had the values with 3.621% and 2.861%, respectively.  Consequently, based on the findings obtained from this study, expansion  and swelling properties of the MDF panels were negatively affected by  compression wood increase.