榉木薄板阻燃处理工艺研究

Fire retardant treatment method for Zelkova schneideriana boards

研究了氮磷系阻燃剂对榉木薄板的最佳阻燃处理工艺,选用由双氰胺、甲醛、尿素、磷酸二氢铵以一定比例配成的阻燃液,研究了温度、时间、pH及阻燃液浓度对阻燃性能的影响。结果表明:一次浸渍液质量分数为20%,时间为48h,pH=12,在100℃烘干6h;二次浸渍液质量分数为10%,时间为22h。经测试所得阻燃榉木的阻燃性能可达阻燃二级。相同条件下不变,将榉木薄片放入阻燃液中后一起放入超声波仪中,一次浸渍和二次浸渍时间分别为1h和1.5h,可达同样效果,实验效率明显提高。

The treatment method of organic PN flameretardant agent to Zelkova schneideriana thin board was studied. The flameretardant solution was made up of formaldehyde urea, dicyandiamide, NH4H2PO4. The influence factors such as temperature,maceration time,pH and proportion of flameretardant solution were studied with orthogonal experiments.The experimental results show that the optimum technology was established that the first maceration was done in 20% solution at pH=12 for 48 h,then Zelkova schneideriana thin board was baked at 100℃ for 6 h,while the second maceration in 10% solution for 22 h. The flameretardant Zelkova schneideriana thin board was of the second grade.In former condition, it has the same result through ultrasonic processing, but the first and the second soaking time are only 1 h and 1.5 h respectively, the experiment efficiency will be greatly advanced. 