【摘要】 以木质纤维为原料,木质素磺酸铵/尿素为填料制备无醛纤维板,并分析试板的结合性能。通过差示扫描量热法(DSC),测定填料木质素磺酸铵/尿素的热反应特性,在确定热压温度参数的基础上,利用正交试验法对其热压工艺参数进行优化。结果表明:在填料量20%,板坯含水率13%,热压温度190℃,热压时间7min的条件下,试板性能可达到欧盟标准EN622-2—2004《硬质纤维板技术要求》的要求。更多还原

【Abstract】 The binding properties of binderless fiberboard made of wood fiber using ammonium lignosulphonate/urea as filling material was analysed. The thermo-reaction properties of lignosulphonate/urea were measured by differential scanning calorimetry ( DSC) ,and the hot-pressing parameters of fiberboard were optimized based on the confirmation of hot-pressing temperature by orthogonal experimental method. The optimal process parameters were obtained as filler content 20% ,mat moisture 13% ,hot-pressing temperature 190 degrees C,and hot-pressing time 7 minutes. The mechanical properties of the test panels could meet the requirements of European standard EN 622-2-2004 for hardboard.更多还原