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  • ISSN 1001-5299    CN 11-1874/S
  • 邮发代号:2-141
  • 主办:中国林产工业协会 国家林业和草原局林产工业规划设计院
林产工业
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UF/PDMI组合胶黏剂在刨花板生产中的应用
采用脲醛树脂 (UF)/聚合异氰酸酯 (PDMI) 组合胶黏剂,以不同的组合配比在较低热压温度 (160 ℃) 条件下用高含水率(9.0%)杂木刨花制备刨花板,检测其静曲强度、内结合强度以及2 h和24 h吸水厚度膨胀率。结果表明:聚合异氰酸酯 (PDMI) 的引入,可以显著提高刨花板的物理力学性能和耐水性能;将刨花终含水率提高至9.0%可节约刨花干燥能耗达13.0%以上;与脲醛树脂胶黏剂 (UF) 相比,使用PDMI/UF配比为1∶9的 (10 .0 wt% PDMI) 组合胶黏剂可以提高刨花板静曲强度80%,提高内结合强度150%;在不添加防水剂的条件下,可以将板材的2 h 吸水厚度膨胀率由31.0%提高至21.0%。该研究可为刨花板节能环保生产提供新思路。
1. 中南林业科技大学材料科学与工程学院, 长沙 410004
2. 大亚人造板集团有限公司, 镇江 212300
3. 广西丰林木业集团股份有限公司, 南宁 530031
Application of UF Resin and PDMI Composite Adhesive in Particleboard Manufacturing
In this study, the application of urea-formaldehyde (UF) resin /isocyanate (PDMI) composite adhesive in particleboard manufacturing was explored. Particleboard was prepared at different UF/PDMI formulations using high moisture content (9.0%) particles and was hot-pressed under a comparatively low temperature of 160℃. The static bending strength (MOR), internal bonding (IB) and thickness swelling (TS) under 2 h and 24 h water soaking of the particleboard were tested. The results show that the incorporation of polyisocyanate (PDMI) resin significantly improved the physical and mechanical properties and water resistance of the particleboard. The energy used for drying process of wood particles could be decreased by 13.0% when drying the particles to a final water content of 9.0%. Compared with UF resin, the MOR and IB of particleboard was increased 80% and 150% respectively by using the PDMI/UF (1∶9, 10.0% of PDMI on weight basis) composite adhesive. The 2 h TS of the particleboard increased from 31.0% to 21.0% without the addition of waterproofing agent. The composite adhesive used in this study provides new ideas for energy-saving and environmentally friendly manufacturing of particleboard.
1. College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China
2. Dare Wood-based Panel Group Co., Ltd., Zhenjiang 212300, China
3. Guangxi Fenglin Wood Industry Group Co., Ltd., Nanning 530031, China