ABSTRACT

In this study, Medium Density Fiberboard (MDF) was manufactured from bamboo (Dendrocalamus strictus Roxb. Nees) fibers and phenol-formaldehyde (PF) resins at different hot-pressing pressures using a novel needle-punching treatment to improve the properties of the panel. One-, two-, three- and four-time needle-punching treatments (1TP, 2TP, 3TP, and 4TP) were used in this work. Laboratory MDF panels were prepared by mixing bamboo fibers with 10% of PF resins. The needle-punching treatments were applied simultaneously on resinated bamboo fibers during the mat formation. The MDF mats were then hot-pressed at 14.0, 17.5, 21.0 kg/cm² and at 150 °C for 15 min. Thereafter, the physical and mechanical properties of MDF panels were evaluated as per Indian Standard (IS) specification IS: 12406. It was observed that the combination of novel needle-punching technique and hot-pressing pressure enhanced the physical and mechanical properties of MDF panels. Statistical analysis suggested that a combination of 3TP and 21.0 kg/cm² of pressures produced the MDF panel with satisfactory results. The research indicated that a combination of needle-punching treatment and hot-pressing pressure could be an excellent technique to improve the properties of the MDF panel.

摘要

在这项研究中，中密度纤维板 (MDF) 由竹 ( Dendrocalamus strictus Roxb. Nees) 纤维和酚醛 (PF) 树脂在不同的热压压力下使用新型针刺处理工艺制造，以改善面板的性能. 这项工作使用了一次、两次、三次和四次针刺处理（1TP、2TP、3TP 和 4TP）。实验室 MDF 面板是通过将竹纤维与 10% 的 PF 树脂混合制成的。在垫子形成过程中，针刺处理同时应用于树脂化竹纤维。然后以 14.0、17.5、21.0 kg/cm ^{2热压 MDF 垫}并在 150 °C 下保持 15 分钟。此后，根据印度标准 (IS) 规范 IS：12406 评估 MDF 面板的物理和机械性能。观察到，新型针刺技术和热压压力的结合提高了 MDF 面板的物理和机械性能. 统计分析表明，3TP 和 21.0 kg/cm ²压力的组合产生了具有令人满意结果的 MDF 面板。研究表明，针刺处理和热压压力的结合可能是改善中密度纤维板性能的绝佳技术。