Study on Poplar Densification by CrossGrain Compression

Crossgrain compression method was applied for intensifying the poplar board. Test results showed that all the physical and mechanical properties of the poplar wood were improved by densification treatment. At 50% compression ratio, 30% initial moisture content and 100℃ compression temperature, the performance of the poplar wood was proven to be better than that of the oak board. The results from observation by scanning electronic microscope (SEM) and Matlab analysis displayed that poplar vessels were severely deformed by crossgrain compression, leading to the reduction of porosity and increment of cell substance per unit volume. Therefore, the effective area to bear the external force was enlarged, and the ability of antiexternal force destruction was greatly enhanced, which could be manifested by remarkable reinforcement of physical and mechanical properties.