本研究探討不同紙漿複合材料(Pulp composites material)之材料配比對於熱性質、流動性質與射出模造成形試片與成品之機械性質的影響，並找出最佳材料後，以不同之製程參數進行全因子射出模造成形實驗，探討製程參數對於機械性質之影響性。研究方法將先進行模具設計與測試，在完成模具設計後，則進行紙漿複合材料製備，接著利用材料熱性質分析及螺旋流動模具短射實驗，探討材料之熱性質以及流動性質，經由螺旋流動模具短射實驗結果可得知具最佳流動性質之紙漿複合材料，接著探討紙纖維與玉米澱粉之配比對於機械性質之影響，並找出最佳性質之紙漿複合材料後，以實驗設計與回歸分析方法找出射出模造成形紙漿複材之抗拉及耐衝擊強度影響最大之製程參數。由實驗結果得知，紙纖維與玉米澱粉之配比對於材料之裂解溫度並無明顯之差異，P48/S7/W45紙漿複合材料具有最高之裂解溫度(Td)為388.9℃；由流動長度結果可得知含水率為主要影響流動長度之因素，當含水率達45 wt%時，具有最高之流動長度為315 mm；紙漿複合材料機械性質結果可得知P38/S17/W45具有最高之拉伸強度為14.52 MPa，P28/S27/W45則具有最高之衝擊強度23.15 J/m，比較整體機械性質後，選擇以P38/S17/W45進行後續全因子射出模造成形實驗，由實驗結果可以得知主要影響拉伸強度之因子為射出速度，主要影響衝擊強度之因子為模具溫度。本研究之紙漿複合材料射出模造成形與機械性質分析研究成果可應用於盆栽、杯墊與紙碗及生醫相關產品。

This study is to investigate the effect of different pulp composites material on thermal, flow and mechanical properties by injection molding. After preparing with the pulp material, a full-factor injection molding experiment has been performed with different process parameters to investigate the influence of process parameters on mechanical properties. In this research, a spiral flow mold and coaster core are designed. The thermal property analysis and short shot experiment of spiral flow mold are used to investigate the flow and thermal properties. From results of short-shot experiment of spiral flow mold, the pulp composites with the best fitting properties can be obtained, and then the effect of the ratio of paper fiber to corn starch on mechanical properties is investigated. Design of injection molding experiment is adopted to find the most significant factors for tensile strength and impact strength of pulp composites samples. Final, the coaster injection molding experiment has been conducted. Results of TGA analysis show that the ratio of paper fiber to corn starch has no significant effect on the degradation temperature of such material. The degradation temperature of P48/S7/W45 is 388.9℃. From result of fitting length, it can be known that the water content is the main significant factor. When the water content is 45 wt%, the highest flow length is 315 mm. Result of mechanical properties show that the tensile strength of the P38/S17/W45 is 14.52 MPa and impact strength of the P28/S27/W45 is 24.86 J/m. Finally, the P28/S27/W45 is selected to conduct full-factor injection molding experiment. From experimental results, injection velocity and the mold temperature are the main effect factors of tensile and impact strength, respectively. Result of this study can be further application on potted plants, coasters, paper cups, paper bowls and other bio-medical products.

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