Abstract:

The wood of poplar is compressed,then the compression deformation is fixed by high temperature steam and heating.This paper discuss on the role of fixation wood compression deformation in the transverse direction.It is measured for the index of anti-swelling efficiency(ASE),moisture excluding efficiency(MEE),weight loss(WL),compression set and recovery set of compressive deformation and so on.The result show that the dimensional stability can be improved apparently by either high temperature steam or heating.At the same temperature condition,when the value of ASE go beyond the scope 50%,the time of high temperature steam treatment is short clearly compared with heated.Compressive deformation of poplar timber is nearly fixed completely while the temperature is 180℃,which heating treatment need to 15～20 hours,but steam treatment only need to 8 minutes.

Key words: Populus ussuriensis, Compression in the transverse direction, Steam treatment, Dimensional stability