本研究依據環氧樹脂塗覆玻璃纖維作業實際事故案例，進行火災危害成因鑑識分析，其研究結果發現作業過程中，主要有二個因素導致火災意外發生，一為塗料環氧樹脂與聚醯胺硬化劑混合後的反應放熱，由微差掃瞄熱卡計與差熱/熱重分析儀可知環氧樹脂與硬化劑混合實驗於52.78℃以上，已產生放熱的危害情形；另杜爾瓶絕熱分析實驗顯示，溫度由23.5℃可升至177℃；另一為塗覆作業光照模擬實驗，以光照促進其發生火災，其溫度可高達350℃以上，玻璃纖維呈現嚴重的焦黑，且PVC電線有小氣爆火苗產生。因此該火災原因係為環氧樹脂放熱反應及經長時間光照導致溫度上升至PVC的自燃溫度263℃，而產生火苗，使環氧樹脂中的二甲苯燃燒。

In this study, we investigated and analyzed the causes of fire hazards based on actual accidents that occurred during epoxy resin fiberglass-coating operations. The research showed that, during the operational process, two major factors can lead to a fire. One factor concerns the heat released after mixing the epoxy and the polyamide-curing agent. Using differential scanning calorimetry and differential heat / thermal weight analysis, we found that a mixture of epoxy and curing agent at above 52.78℃ creates a heat-releasing hazard. Also, an pseudo-diabatic analysis performed in a Dewar vessle showed that the emperature could rise from 23.5℃ to 177℃. The other factor that could increase the fire hazard is the illumination source used during the coating operation. Our experiment simulating the accident conditions indicated that the temperature could rise above 350℃. The fiberglass-reinforced plastics showed serious burn marks, and the polyvinyl chloride (PVC) cable emitted small explosion-causing flames. The fire cause determination for mixed heat release of epoxy resin and curing agent with long turn illumination cause temperature increase archive PVC autoignition temperature 263℃ to ignite xylene flammable solvents.