研究為遠紅外線放射特性及抗菌性等多機能性聚丙烯(polypropene, PP)纖維之開發研究，係使用雙螺桿混煉法將奈米級二氧化矽及氧化鋅粉體均勻混摻於聚丙烯粒中，提升聚丙烯纖維機械性質與熱性質，同時具有遠紅外線放射、溫升及抗菌等附加機能，有助於提升機能性紡織品之相關運用。
本研究開發分成二部分，第一部分為複合材料開發，探討聚丙烯複合材料之熱性質及加工性質，熱性質方面透過熱重損失分析發現奈米粉體添於聚丙烯中，能提升聚丙烯之熱裂解溫度；由熱示差分析發現奈米粉體添於聚丙烯中具有成核劑的效用，提高結晶溫度及結晶度改善聚丙烯耐熱性；在加工性質方面常因粉體添加過多將導致流動性不佳，故透過熔融指數分析儀發現二氧化矽的添加有助於材料之流動性，以利後續熔融紡絲加工。
第二部分為聚丙烯複合纖維製程參數設計，利用田口方法(Taguchi method)將粉體比例、雙螺桿混煉及熔融紡絲之製程參數進行實驗規劃，並利用灰關聯分析法(grey relational analysis, GRA)求得各品質特性之客觀權重值，最後結合理想解類似度順序偏好法(technique for order preference by similarity to ideal solution, TOPSIS)進行多品質分析探討加工參數對纖維品質之影響。結果顯示複合纖維相較於純聚丙烯纖維有較好的機械性質，說明品質工程理論能大幅改善複合纖維之品質特性。
經遠紅外線放射測試發現複合纖維之遠紅外線放射值為85%相較於純聚丙烯提升2.3倍，經遠紅外線溫升測試複合纖維溫度升高8.6°C，相較於純聚丙烯溫升6°C提升43%；透過抗菌測試，複合纖維於黃金葡萄球菌(Staphyloccocus aureus rosenbach)及肺炎桿菌(Klebsiella pneumoniae)下皆有抗菌效果。測試結果證實聚丙烯添加奈米二氧化矽及氧化鋅之複合纖維均符合遠紅外線放射特性FTTS-FA-010及定性抗菌JIS L-1902之標準。

This study aims to develop multifunctional polypropylene fiber with far infrared ray emission property and microorganism resistance. The nanoscale silicon dioxide and zinc oxide powder are blended with polypropylene cheap uniformly by twin-screw mixing, and then the fiber is produced by melt spinning, the polypropylene fiber's mechanical property and thermal property are enhanced, and it has additional functions of far infrared ray emission, temperature rise and antibiosis, contributing to enhancing relevant application of functional textile.
The development is divided into two parts in this study, Part 1 is the development of composite material, the thermal property and working properties of polypropylene composite material are discussed. In terms of thermal property, the thermogravimetry analyzer shows the addition of nano-powder to the polypropylene can increase the pyrolysis temperature of polypropylene. The differential scanning calorimetry shows the nano-powder in the polypropylene has the effectiveness of nucleating agent, increasing the crystallization temperature and the degree of crystallinity, improving the heat resistance of polypropylene. In terms of working properties, excessive addition of powder often causes bad flowability, so the melt index shows the addition of silicon dioxide contributes to the flowability of material, helpful to subsequent melt spinning process.
Part 2 shows the polypropylene composite fiber process parameter design, the process parameters of powder proportion, twin-screw mixing and melt spinning are planned by using Taguchi method, and the objective weights of quality characteristics are obtained by grey relational analysis (GRA). Finally, the technique for order preference by similarity to ideal solution (TOPSIS) is used for multi-quality analysis to discuss the influence of processing parameters on the fiber quality. The results show that the composite fiber has better mechanical property than pure polypropylene fiber, proving that the quality engineering theory can improve the quality characteristics of composite fiber greatly.
According to the far infrared ray emission test, the far infrared ray emission value of composite fiber is 85%, it is 2.3 times of pure polypropylene. According to the far infrared ray emission temperature rise test, the composite fiber temperature increases by 8.6℃, 43% higher than the 6℃ temperature rise of pure polypropylene. The antibacterial test shows the composite fiber has antibacterial effect on staphylococcus aureus and pneumobacillus. The test results show that the composite fiber of polypropylene with nano silicon dioxide and zinc oxide meets the far infrared ray emission property FTTS-FA-010 and qualitative antibacterial JIS L-1902 standards.

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