辊压处理大青杨木材的密度和干缩系数变异  

Variation of Density and Shrinkage Rate of Popular Sample Compressed by Rollers

作　　者：孙耀星[1] 刘一星[2] 

机构地区：[1]北华大学,吉林省吉林市132013 [2]教育部生物质材料科学与技术重点实验室(东北林业大学),哈尔滨150040

出　　处：《木材工业》2007年第6期13-16,共4页China Wood Industry

基　　金：引进国际先进农业科技技术(948)项目(2004-4-43)

摘　　要：对大青杨辊压处理材（压缩率10％～50％）的密度和干缩系数进行测试和研究。结果表明，与素材相比，辊压处理材的全干、气干和基本密度均有所增加，密度变化率〈5％，其中气干密度增幅最大，密度变异与压缩方向无明显相关；气干和全干干缩系数随压缩率增大而变大，变动范围3．448％～23．678％；弦向干缩系数变化大于径向。The timber of Populus ussuriensis Kom. was compressed transversely by rollers under several conditions of compression ratios from 10% to 50%. Comparing the density and shrinkage rate between compressed and uncompressed samples, the results showed that the density of compressed sample increased with the rise of the compression ratio and less than 5% without relation to the compression direction. The shrinkage coefficients of compressed sample increased gradually with the increase of the compression rate while the coefficients of shrinkage of tangential compression increased more than that of radial compression. The range of all shrinkage rates was from -3. 448% to 23. 678%.

关 键 词：辊压处理 压缩率 木材密度 干缩系数 

分 类 号：TS611[轻工技术与工程]