摘要
植物纤维发泡包装材料是一种环境友好型的新型包装材料。对该包装材料的干燥工艺和水分移动机理进行了研究。选择了三种干燥方案,分析研究结果表明:植物纤维发泡材料的干燥经历了等速和减速的干燥过程,其临界含水率为237.5%(db);如果干燥初期材料本身的温度太高,会引起材料结构的破坏;在高温作用下形成的表面硬结严重影响了水分的蒸发,利用水热原理可以消除或缓解,从而可加速干燥的进行。
The EPFBW1 is a new type of environmental friendly packing material. In this paper, research on moisture moving mechanism and drying technology of the EPFBW was conducted. 3 kinds of drying plan were chosen, the results showed that all of them experienced constant rate drying stage and then decelerating rate drying process, the critical moisture content is 237.5%; Too higher temperature at beginning drying stage would destory the structure of sample; The high temperature during drying process would make surface layer harden which would obstruct moisture to move seriously but could be alleviated by combination of water and heat.
基金
福建省自然科学基金资助项目(2006J0149)。
关键词
植物纤维
发泡
包装材料
干燥
Expanded
Plant fiber
Packing material
Dry
