摘要
分别采用高温湿热处理和二次干燥湿热工艺对钢琴用云杉干板材进行再处理。通过对两种宽、窄年轮的云杉板材吸湿性的研究发现:经过高温湿热处理和二次干燥湿热处理均能有效降低试材的吸湿性能,且随着处理温度升高,吸湿性降低的幅度增大,尺寸稳定性更好。其中,经过140℃、8h高温热处理的云杉弦向尺寸变化率为1.74%,径向尺寸变化率为1.02%,吸湿性能最接近AI材的水平。
In this study,spruce wood used for piano was treated by either high temperature steaming or second drying.The hygroscopicity of spruce wood with wide or narrow annual ring was investigated.It was found that the moisture absorption of the samples was effectively decreased by both treatments,and that higher treatment temperature led to lower hygroscopicity and better dimensional stability.After the 8-hour treatment at 140℃,the tangential and radial dimensional changes of the samples were 1.74% and 1.02%,respectively,the performance most close to the demand of AI standard.
出处
《林业科技开发》
2011年第6期80-82,共3页
China Forestry Science and Technology
基金
国家林业局"948"项目(编号:2011-4-12)
关键词
云杉板材
热处理
吸湿性
spruce
moisture absorption
tangential direction
radial direction
