目前因傳統減法製造技術無法製作複雜之內部結構，市面上的防火材料多為實心板材，且較少有研究指出內部結構對阻燃性能的影響與趨勢為何，因此本研究利用材料擠出成形法3D列印，來製作具形狀偏移設計之阻燃結構，透過改變結構內部形狀與排列，使其在受燃燒時能迅速形成穩定炭層，隔絕火焰與抑制可燃氣體進入，使其達到與實心板材相似之阻燃效果，但同時又能節省材料用量。
因阻燃材料性質與一般3D列印材料不同，需找到較適當之列印參數，使列印成品具有較佳的品質後，再透過調整內部填充形狀、內部填充密度、切層厚度與外部實心層厚度來得到具有不同特性的樣品後進行燃燒實驗測試，觀察其對於阻燃性能的效益與趨勢，由測試結果發現在同樣結構條件下影響阻燃性之根本原因為材料量，若物體的材料量太少而不足以產生焦炭時則對火焰的抵抗力較差，使表面破孔情況較嚴重。若材料量太多時，雖然能改善表面破孔情況，但會產生嚴重的形狀變形與膨脹。最終本研究設計出偏移的阻燃結構，並以燃燒實驗檢測來驗證其阻燃效果，其中三角形阻燃結構效果較佳，能加強對火焰的抵抗性且可應用於其他可燃物品上作為保護層，改善可燃物體之防火性。

At present, traditional subtractive manufacturing techniques can not produce complex internal structures. Most of the fireproof materials on the market are solid plates, and rare studies have pointed out the influence and trend of internal structure on flame retardant performance. Therefore, this study uses material extrusion molding 3D printing to produce a flame retardant structure with a shape offset design. By varying the shape and arrangement of the internal structure, so that it can quickly form a stable char layer when it is burned, insulates the flame and inhibits the entry of flammable gases, it achieves a flame retardant effect similar to a solid sheet and saves material usage.
Because the properties of the flame retardant material are different from those of the general 3D printing materials, it is necessary to find suitable printing parameters to make the printed product have better quality, and then adjust the infill pattern, the infill density, the primary layer height and the external solid layer to obtain the sample with different characteristics and then perform a combustion test. Observing the benefits and trends of flame retardant performance, the main reason effect of the flammability under the same structural conditions was found to be the amount of material. If the amount of material of the object is too small to produce char, the resistance to the flame is poor, it will cause the surface broken severely. If the amount of material is too large, although the surface breakage can be improved, severe shape deformation and expansion will occur. Finally, this study designed the offset flame retardant structure and verified its flame retardant effect by combustion test. The triangular flame retardant structure has better effect, can enhance the resistance to flame and can be applied to other combustible materials as protection layer to improve the fire resistance of flammable objects.

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