摘要
采用高频介质加热技术,研究了不同含水率条件下的多层豆胶胶合板板坯温度场分布和水分迁移情况,以及单板涂胶量对豆胶胶合板胶合性能的影响。结果表明:在高频热压(频率为6.78 MHz,压力为1.0 MPa)过程中,板坯内部温度场分布均匀;干燥效率呈现出从表层向芯层逐渐增加,即由里到外的干燥模式;当单板双面涂胶量为400 g/m2时,胶层平均湿态剪切强度为0.83 MPa,高频热压时间仅为12 min。
The distribution of temperature field and moisture migration in the mats with different moisture content through radio-frequency （ RF） heating and pressing was investigated in this work, the influence of gluing content of soyprotein adhesive （ SPA） on the bonding characteristics of plywood was also examined. The results showed that the mats had a u-niformly distribution of temperature field during the RF heating at 6.78 MHz and pressing at 1.0 MPa. The RF drying ef-ficiency increased towards the center of the mats, creating the typical drying pattern from inside to outside. When the glue spread amount （ two faces） of veneer was 400 g/m2 , the wet shear strength of plywood was 0.83 MPa and the work-ing time was just 12 min.
出处
《南京林业大学学报（自然科学版）》
CAS
CSCD
北大核心
2014年第3期120-124,共5页
Journal of Nanjing Forestry University：Natural Sciences Edition
基金
高校科研成果产业化推进工程项目(JH10-15)
苏北科技富民强县项目(BN2009011)
江苏省科技型企业技术创新资金项目(BC2013422)
关键词
胶合板
高频热压
大豆蛋白胶黏剂
胶合性能
plywood
radio-frequency heating and pressing
soy protein adhesive
bonding characteristics
