材料受輻射引燃之著火性研究

潘南榮

[摘要]

本研究係以較大尺寸試體(A尺寸試體)在較不穩定量熱輻射作用下之材料著火性質，與較小尺寸試體(B尺寸試體)在定量熱輻射之表面著火試驗中之結果，比較分析木質材料與塑膠材料等，因材質、尺寸大小及材料厚度大小對熱輻射引燃性質的影響。由實驗結果得知，不論是木質材料或塑膠材料，大尺寸與小尺寸的結果均存在著相關性，但其相關性視各個材料而有所不同。其中由於塑膠材料為均質材料，故其熱性質的重現性在大、小尺寸的實驗中，均較木質材料為高。而在厚材與薄材的比較方面，在較低量熱輻射時雖薄板較易引燃，但在較高量熱輻射時，薄板與厚板之熱輻射引燃時間，則有愈來愈接近的趨勢。綜合論之，若能經過適當的修正，木質材料與塑膠材料大尺寸著火性質，可經由修正小尺寸之實驗結果而得到。

[摘要]

In the unsteady heat flux ignition of the larger dimension specimens and the surface ignition of the smaller dimension specimens, there are different results out. In this study, it compares the differences which are between the ignitabilites of heat flux ignition of wood and plastic products with the material properties, dimensions and thickness. We know that they are correlative in the larger and smaller dimension when we use the wood product specimens. But the correlation is distinct from the different dimensions. The plastic, the homogenous material, its thermal properties are more reproductive than wood product specimens, no matter the larger dimensions or the smaller dimensions. The thermal thin materials are more inflammable in the condition of the smaller amount of heat flux than thermal thick materials. But the time is might going to be equal, when we ignition those materials under the larger amount of heat flux condition. In conclusion, by the experiment result in smaller dimension of wood and plastic products, it can estimate the ignitability of heat flux of the larger dimension ones if we make proper modification.