本篇研究使用熔融電紡技術與氣渦流加撚系統結合，並進行紗線熱延伸、熱定型、以及聚丙烯包芯紗的紗線性質研究，以及開發多針熔融電紡系統改變針頭間距以及改變接收屏系統觀察電紡纖維沉積型態，最後再將多針熔融電紡及氣渦流加撚系統紡製出多針電紡奈米紗線。
本實驗分為三部份，第一部分將單針紗線改變捲取速度以及氣渦流空氣流量得到最佳的捲取速度120cm/min及空氣流量100L/min，電紡奈米紗線斷裂強度達到1.15 cN/tex，之後將紗線用熱延伸延伸溫度80℃與延伸倍率2倍再將紗線熱定型，使紗線斷裂強度達到2.74 cN/tex。
第二部分將聚丙烯35D紗線與聚乳酸電紡纖維結合，發現捲取速度80cm/min及氣渦流100L/min可製作出最佳的包芯紗，之後將包芯紗線用熱延伸溫度70℃與延伸倍率1.2倍，包芯紗的斷裂強度因此達到2.75 cN/tex。
第三部分開發多針熔融電紡技術，探討其電紡參數得到最佳參數為模頭溫度260℃、電壓50kV、工作距離8公分、供給量0.02g/min得到8μm的纖維直徑，再改變針頭孔洞尺寸0.3毫米得到纖維直徑5μm及改變紡絲空間溫度70℃得到纖維直徑為4μm，以及探討其針頭距離改變由11毫米至44毫米及改變接收屏系統觀察其電紡纖維沉積型態，發現固定式接收屏電紡纖維在11毫米針頭間距會重疊，滾筒為長直條狀電紡纖維間的距離為針頭間的距離，最後在將多針熔融電紡技術與氣渦流加撚系統結合，紡製出多針電紡奈米紗線最佳的捲取速度為140cm/min，紗線斷裂強度提升至1.5 cN/tex。
由多針熔融電紡技術沉積結果得知，若是能夠將針頭距離縮短，可以達到縮小工業化機台尺寸，與工業化量產前景達到更廣泛應用。

This research combined the techniques of melting electronspun and air vortex spinning to form the polylactide (PLA) yarn, through hot drawing, heat setting of PLA and PP core spun yarn. Not only single nozzle, in order to study mass production, multi nozzle melting electronspspun of air vortex PLA yarn was also developed.
This research contains three parts. First part, the single nozzle system we discussed. We derived the best PLA electronspspun fiber with the take up speed 120 cm/min and air flow 100 L/min. The results also shows that under 90℃ for heat setting and stretch ratio 2 and 80℃ for the hot drawing with best breaking strength as 2.74 cN/tex. Second part, PLA/PP core spun yarn with best performance under the take up speed 80 cm/min and air flow 100 L/min. The results also shows that without heat setting and stretch ratio 1.2 and 70℃ for the hot drawing with best breaking strength as 2.75 cN/tex. The surface morphology after and before hot drawing and heat setting behaviors were also researched. The last part, we discuss the multi nozzle system. We found the best parameter for the breaking strength, 1.5 cN/tex, as take up speed 140 cm/min. From the deposition morphology, we can realize the shorter working distance have better yarn structure which may meet the minimizing of machine size for the real industrial application.

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