By adopting the 100℃drying test method,the drying characteristics and drying schedule of the pre-frozen and unfrozen Eucalyptus pellita wood were studied.The results show that the pre-freezing treatment reduced the i...By adopting the 100℃drying test method,the drying characteristics and drying schedule of the pre-frozen and unfrozen Eucalyptus pellita wood were studied.The results show that the pre-freezing treatment reduced the initial crack, inner crack and cross section deformation of wood, and the drying quality for the frozen wood was superior to that for the control.展开更多
Drying characteristics of 5 species of tropical plantation wood were studied by the100℃-test method. The results showed that almost every sample had some light end checks and thesamples of Eucalyptus citriodora and E...Drying characteristics of 5 species of tropical plantation wood were studied by the100℃-test method. The results showed that almost every sample had some light end checks and thesamples of Eucalyptus citriodora and E. exserta were severer than the others in the end check.E. grandis × E. urophylla and Acacia mangium were the severest in internal checks, followed byE. grandis, E. exserta and E. citriodora. And E. grandis and E. grandis × E. urophylla were theseverest in cross-section deformation, followed by A. mangium, E. citriodora and E. exserta. All these5 species of tropical plantation wood were difficult to dry, so the mild drying schedules should beadopted and at the early stage the drying temperature should not be over 50 oC and the relative humidity(RH) should be high. Five drying schedules were gained through analyzing the drying characteristics ofthese tropical species after the 100℃- test.展开更多
文摘By adopting the 100℃drying test method,the drying characteristics and drying schedule of the pre-frozen and unfrozen Eucalyptus pellita wood were studied.The results show that the pre-freezing treatment reduced the initial crack, inner crack and cross section deformation of wood, and the drying quality for the frozen wood was superior to that for the control.
文摘Drying characteristics of 5 species of tropical plantation wood were studied by the100℃-test method. The results showed that almost every sample had some light end checks and thesamples of Eucalyptus citriodora and E. exserta were severer than the others in the end check.E. grandis × E. urophylla and Acacia mangium were the severest in internal checks, followed byE. grandis, E. exserta and E. citriodora. And E. grandis and E. grandis × E. urophylla were theseverest in cross-section deformation, followed by A. mangium, E. citriodora and E. exserta. All these5 species of tropical plantation wood were difficult to dry, so the mild drying schedules should beadopted and at the early stage the drying temperature should not be over 50 oC and the relative humidity(RH) should be high. Five drying schedules were gained through analyzing the drying characteristics ofthese tropical species after the 100℃- test.