本論文是研究可降解性高分子聚乳酸(Poly Lactic Acid, PLA)與奈米雲母(Nano Mica)，將兩種材料利用熔融插層法相互混煉(Compounding)成為新的奈米複合材料後進行射出成型(Injection Molding)，其加工參數包括混煉時間、螺桿轉速、加熱板溫度、奈米雲母比例、熔料溫度、噴嘴溫度、保壓壓力及射出速度。由於塑膠材料大多強度不足、耐燃性差、無法有效阻隔紫外線以及吸收遠紅外線，故探討之品質特性分別為抗紫外線能力、遠紅外線吸收能力、硬度及耐燃性。本研究經由田口方法(Taguchi Method)中的直交表規劃實驗，再以田口方法中的主效果分析與變異數分析理論得到單一品質的最佳化參數並且探討其加工參數對品質的影響，最後利用層級分析法(Analytic Hierarchy Process) 建立對比矩陣，經過一致性的檢定與總權重計算後進行重要性排序，整理實驗所得到的各品質數據進而探討聚乳酸混合奈米雲母之多品質最佳化之參數，最後依據得到的多品質最佳化之參數透過確認實驗與計算信賴區間，證實其加工參數最佳化組合的再現性。實驗結果顯示，最佳之加工參數分別為混煉時間10 min、螺桿轉速50 rpm、加熱板溫度190 ℃、奈米雲母比例5wt％、熔料溫度220 ℃、噴嘴溫度230 ℃、保壓壓力60 kg/cm2及射出速度80 cm3/sec。透過五次確認實驗顯示四種品質特性平均值分別為：抗紫外線能力98.22％、遠紅外線吸收能力90.53％、硬度M 108.07及耐燃性限氧指數30，其訊號雜音比(Signal-to-Noise ratio, S/N)皆落在95％信賴區間內，故本研究所規劃的實驗有效的提升多種品質特性，對於多品質加工參數最佳化有良好的再現性。

This thesis studies poly lactic acid and nano mica, using the compounding method to mix the two materials into a new nano compound material for injection molding. The process parameters include compounding duration, spinning speed, heating pad temperature, nano mica’s weight percentage, melting material temperature, nozzle temperature, packing pressure and injection speed. Due to lack of strength of the adhesive material and heat resistance, there is no way to effectively block ultraviolet rays and adsorb infrared far-infrared, therefore, the qualities under research are the ability to resist ultraviolet rays, the ability to absorb infrared rays, hardness, and heat resistance. The planning of this study draws from the Taguchi method’s array, then further using the parameters and results of the Taguchi method to determine the optimal values for the parameters in order to examine the effects of these parameters on the qualities. We use analytic hierarchy process to establish contrast matrix, through consistent examination and recalculation to determine the priorities, organizing the states from each quality in the experiment to determine the optimal parameters for the new nano compound material, In the end, we use the results of the optimal parameters to verify and calculate the margin of error and to prove the optimal parameters repeatability. The results show that the optimal parameters are compounding duration 10min, spinning speed 50 rpm, heating pad temperature 190 ℃, nano mica’s weight percentage 5wt%, melting material temperature 220 ℃, nozzle temperature 230 ℃, packing pressure 60 kg/cm2 and injection speed 80 cm3/sec. After five experiments, the four qualities averages are: ultraviolet resistance 98.22%, far-infrared absorbance 90.53%, strength M 108.07 and melting material oxygen limitation number 30, The Signal-to-Noise ratios are within 95% significance interval. Therefore, this experiment effectively enhanced multiple qualities of the material and produced good repeatability in results for the optimal parameters.

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