木材科学与技术2023，Vol.37Issue(5)：69-76,8.DOI:10.12326/j.2096-9694.2023066
预蒸处理对辐射松脱脂效果及干燥质量的影响
Effect of Pre-Steaming on Deresination Rate and Drying Quality of Radiata Pine Lumber
摘要
Abstract
The sawn timber of radiata pine(Pinus radiata)was degreased and dried by combining pre-steaming and conventional drying.The effects of pre-steaming on the moisture content(MC),the deresination rate,and the drying quality of radiata pine sapwood and heartwood were analyzed.The results showed that after the pre-steaming treatment,the drying time of heartwood shortened but the drying time of sapwood had little change.Because the lower resin content and higher permeability of sapwood,the pre-steaming had a little effect on the deresination rate of sapwood.The deresination rate of the sapwood was about 60%in both with and without pre-steaming techniques.For heartwood,pre-steaming treatment promoted the migration of resin,so that the deresination rate of the pre-steaming group was higher than that of the control group.However,the initial MC of the heartwood was low and the permeability was poor,so the deresination rate of heartwood was lower than that of sapwood.Both the pre-steamed group and the control group showed good anti-resin-exudation.The visual quality of the pre-steaming group was better than that of the control group.In conclusion,pre-steaming treatment had no significant effect on the drying quality of sapwood and heartwood.Special attention was paid to prevent the distortion caused by the spiral texture of heartwood in the process of wood drying.关键词
预蒸处理/辐射松/脱脂率/木材干燥质量/边材/心材Key words
pre-steaming treatment/radiata pine/deresination rate/wood drying quality/sapwood/heartwood分类
农业科技引用本文复制引用
曹惠敏,殷方宇,周永东,伊松林,周凡,高鑫..预蒸处理对辐射松脱脂效果及干燥质量的影响[J].木材科学与技术,2023,37(5):69-76,8.基金项目
中央级公益性科研院所基本科研业务费专项资金"进口辐射松木材提质处理技术研究"(CAFYBB2021QA003). （CAFYBB2021QA003）
