Li Zhihui, Qi Xinglai, Gao Yanlong, Zhou Yonghui, Chen Nairong, Zeng Qinzhi, Fan Mizi, Rao Jiuping
College of Materials Engineering, Fujian Agriculture and Forestry University 350002 Fuzhou Fujian China
College of Engineering, Design and Physical Sciences, Brunel University London Uxbridge UB8 3PH UK.
RSC Adv. 2019 Jul 10;9(37):21530-21538. doi: 10.1039/c9ra02848j. eCollection 2019 Jul 5.
In order to solve the practical problem of heat transfer during the hot pressing process of a novel wood-plastic composite plywood, this paper investigates the perforation treatment of polyvinyl chloride (PVC) plastic films and their plywood composites. The PVC films were pretreated by the physical punching method, and the effects of PVC perforation diameter, hot pressing time and hot pressing temperature on the mechanical properties of the plywood composites were investigated by orthogonal experimental design. The results showed that the optimum hot pressing time was 7 min, the hot pressing temperature was 170 °C, and the PVC perforation diameter was 15 mm for the optimum mechanical properties. The punching pretreatment of PVC films gave rise to a reduction of the hot pressing time by 51 s due to improved heat transfer and heat loss by 5.06%, and allowed an increase in the initial moisture content of the veneer by 2-3%, thereby cutting down the drying cost in the veneer production process, which is conducive to energy conservation and environmental protection.
为解决新型木塑复合胶合板热压过程中的实际传热问题，本文研究了聚氯乙烯（PVC）塑料薄膜及其胶合板复合材料的穿孔处理。采用物理冲孔法对PVC薄膜进行预处理，并通过正交试验设计研究了PVC穿孔直径、热压时间和热压温度对胶合板复合材料力学性能的影响。结果表明，对于最佳力学性能，最佳热压时间为7分钟，热压温度为170℃，PVC穿孔直径为15毫米。PVC薄膜的冲孔预处理使热压时间减少了51秒，这是由于传热改善且热损失减少了5.06%，并使单板的初始含水率提高了2%-3%，从而降低了单板生产过程中的干燥成本，有利于节能环保。
