This study investigated the effects of processing parameters, namely particle mixing ratios, press temperatures, and time for the manufacturing of jute stick binderless particleboard (JBPB). Different ratios of fine and coarse particles, press temperature (160 to 240 °C) and press time (4 to 10 min) were used for JBPB fabrication with a target density of 0.9 g/cm3. The dimensional stability and mechanical properties of JBPB were determined according to Japanese Industrial Standard JIS A 5908 (2003). The result shows that the most favorable pressing conditions in the manufacturing process were press temperature of 220 °C for 6 min with a mixing ratio of 50:50 (fine: coarse). The modulus of rupture (MOR), modulus of elasticity (MOE), and internal bonding (IB) of JBPB was 16.35 N/mm2, 3872.99 N/mm2, and 1.07 N/mm2, respectively, which met the minimum requirement for type-18 of particleboard JIS A 5908 (2003) except for the value of MOR. The bonding mechanism was analyzed by the chemical changes in the raw materials after the fabrication of JBPBs. The pentosans present in the raw material decreased with the increased press temperatures. In this study, the hemicellulose was decomposed which may accelerate the self-bonding of the JBPB at high temperatures. The thermal gravimetric analysis (TGA) revealed that the JBPB showed good thermal stability with the increase of press temperatures. Fourier transform infrared (FTIR) spectra indicated that the removal of hydroxyl groups which increased the dimensional stability of JBPBs. Hence, it could be concluded that by controlling particle mixing ratio (50:50) at high press temperature with proper press time, high-performance jute stick binderless particleboard could be successfully developed which has a variety of applications.

中文翻译：

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黄麻棒无胶刨花板生产工艺参数的优化

这项研究调查了工艺参数的影响，即颗粒混合比，压榨温度和生产黄麻棒无粘结剂刨花板（JBPB）的时间。JBPB的制造使用了不同比例的细颗粒和粗颗粒，压制温度（160至240°C）和压制时间（4至10分钟），目标密度为0.9 g / cm3。根据日本工业标准JIS A 5908（2003）确定JBPB的尺寸稳定性和机械性能。结果表明，在制造过程中最有利的压制条件是压制温度为220°C持续6分钟，混合比例为50:50（精细：粗糙）。JBPB的断裂模量（MOR），弹性模量（MOE）和内部键合（IB）分别为16.35 N / mm2、3872.99 N / mm2和1.07 N / mm2，符合刨花板JIS A 5908（2003）中18型的最低要求。通过制造JBPB后原料中的化学变化来分析键合机理。原料中存在的戊聚糖随着压榨温度的升高而降低。在这项研究中，半纤维素被分解，这可能会加速高温下JBPB的自结合。热重分析（TGA）表明，随着压机温度的升高，JBPB表现出良好的热稳定性。傅立叶变换红外光谱（FTIR）表明，羟基的去除增加了JBPB的尺寸稳定性。因此，可以得出结论，通过在高压制温度下以适当的压制时间控制颗粒混合比（50:50），