| 单板条层积材密度梯度的研究 |
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| 引用本文： | 王石建,那斌,高婧,卢晓宁.单板条层积材密度梯度的研究[J].南京林业大学学报(自然科学版),2012,36(4):115-118. |
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| 作者姓名： | 王石建 那斌 高婧 卢晓宁 |
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| 作者单位： | 南京林业大学木材工业学院,江苏 南京,210037 |
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| 基金项目： | 国家林业公益性行业科研专项项目，江苏省科技攻关项目，江苏省苏北科技发展计划，江苏省科技型企业技术创新资金项目 |
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| 摘 要： | 通过不施胶压制单板条层积材(PSL)板坯,测定板坯各层的密度分布规律并对其进行统计分析。结果表明,板坯内各层的单板条压缩后密度呈正态分布。根据预测方程计算板坯密度梯度,并将密度梯度预测值与统计分布区间进行比较,结果表明,当热压压力低于5 MPa时,计算值能较好地与统计区间吻合,板坯密度梯度不大;当热压压力为5 MPa时,计算值与统计区间相差较大,经过分析修正,最终得出板坯密度梯度的计算模型。通过断面密度扫描试验,最终得出的计算模型能反映PSL板坯的密度梯度。
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| 关 键 词： | 杨木单板 单板条层积材 密度分布规律 密度梯度 |
Research on density gradient of parallel strand lumber |
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| WANG Shijian
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NA Bin
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GAO Jing
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LU Xiaoning.Research on density gradient of parallel strand lumber[J].Journal of Nanjing Forestry University(Natural Sciences ),2012,36(4):115-118. |
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| Authors: | WANG Shijian NA Bin GAO Jing LU Xiaoning |
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| Institution: | (College of Wood Science and Technology,Nanjing Forestry University,Nanjing 210037,China) |
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| Abstract: | Statistical analysis on the density distribution of each layer was made based on the PSL(parallel strand lumber) pressed without glue.The result indicated that the density of each veneer strip after pressed met the normal distribution.The predicted value calculated by the model would be compared with statistical distribution range.When the pressure is lower than 5 MPa,the calculated value meets well with statistical distribution range.But when the pressure is 5 MPa,there is a great difference between them.And finally the density gradient model was confirmed.The result of face density scanning indicated that the density gradient model of PSL is accurate. |
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| Keywords: | poplar veneer parallel strand lumber(PSL) density distribution density gradient |
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