摘要
为了研究初含水率对杨木胶合板板坯的导热性能以及对热压传热过程的影响,采用准稳态法测试了不同含水率条件下施胶杨木胶合板坯的导热系数,并进行了热压工艺试验。结果表明,随着板坯含水率从10%增加到22%,板坯的导热系数明显增加;胶合板热压传热过程可以分为快速升温和慢速升温两个阶段,在快速升温阶段芯层升温速率随着板坯初含水率的提高而递增,在慢速升温阶段初含水率对芯层升温速率基本没有影响。
In order to investigate the effect of moisture content on the thermal conductivity and heat transfer during hot pressing of plywood,the quasi steady method was applied to measure the thermal conductivity of the resinated plywood assembly with different moisture contents during hot pressing.The results showed that with moisture content increased from 10% to 20%,the thermal conductivity increased significantly,and that plywood hot pressing can be divided into fast heating and slow heating phases.During the first phase the heating rate of the core layer rised with the increase of moisture content while during the second phase the impact of moisture content on the heating rate of the core layer could be ignored.
出处
《林业科技开发》
北大核心
2013年第1期32-34,共3页
China Forestry Science and Technology
基金
"十二五"国家科技支撑计划"胶合板生产干燥节能技术"(编号:2012BAD24B0304)
苏北科技发展计划--科技型企业技术创新项目(编号:BC2011422)
关键词
胶合板
含水率
导热系数
传热
plywood
moisture content
thermal conductivity
hot pressing
