烟头对聚氨酯泡沫塑料点燃能力的模拟实验研究

A Simulation Experiment Study on the Ignition of the Cigarette Butt on Polyurethane Foam Plastic

以聚氨酯泡沫塑料为实验对象,使用火灾痕迹物证综合实验台等仪器模拟火场条件,分别考虑了烟头所处的位置、长度,实验材料状态及实验材料与棉布组成双元材料体系对实验结果的影响。由熄灭时间、熔化炭化大小、烟头燃烧剩余长度及检测材料被烟头点燃过程中的温度表明:烟头在所模拟的实验条件下不能使聚氨酯泡沫塑料发生有焰燃烧;烟头对泡沫塑料的点燃能力由强到弱的顺序依次为烟头平放在材料内部、朝上放入材料内部和平放在材料表面;烟头朝下放入聚氨酯泡沫塑料内部也能产生阴燃,不会迅速熄灭。本实验研究,可为实际火灾调查工作提供参考依据。

Taking the polyurethane foam plastic as the experimental objects, simulating fire scene conditions by a fire trace evidence experiment table, considering the influence of the position and length of the cigarette butt, the ex- periment material states, and the double material system composed of the experiment materials and cotton cloth on the experiment, results were obtained in this paper. Results show that the cigarette butt can not make the polyure- thane foam plastic occur flame combustion, and the ignition ability of the cigarette butt on foam plastics as the ciga- rette butt position varies, horizontally put in the inside materials, the cigarette butt put in the inner materials up a- long, the cigarette butt horizontally put on the surface of the materials. Besides, cigarette downward into polyure- thane foam plastic internal can also produce smoldering, and will not be quickly extinguished. Therefore, the study of this experiment can provide reference for practical fire investigation.