本研究開發一同時具有遠紅外線放射、抗靜電及暖感之發熱聚酯機能性纖維織物，適用於冬季服飾。本研究之開發分為兩部分：
第一部份為聚酯纖維遠紅外線機能改質開發及研究，透過奈米鍺金屬及與聚酯材料之熔融混煉，使聚酯附有遠紅外線機能，纖維能吸收陽光中之遠紅外線，達到溫度上升之效果。改質後之聚酯材料透過熔融紡絲製程製作75d/72f之全延伸絲(Full drawn yarn, FDY)，製程透過田口方法(Taguchi method)結合層級分析法(Analytic hierarchy process, AHP)及理想解類似度順序偏好法(Technique for order preferenceby similarity to ideal solution, TOPSIS) 探討最佳化遠紅外線聚酯纖維之拉伸強度、伸長率、丹尼數、遠紅外線放射率及遠紅外線溫升等性質。結果顯示，最佳化遠紅外線聚酯纖維之拉伸強度為4.84 g/d，斷裂伸長率為41.26％，丹尼數為74.39d / 72f，遠紅外線放射率為89％，遠紅外線溫升為6.3℃，且透過表面觀測證實本研究確實混煉奈米鍺金屬與聚酯材料並具有良好之分散性。
第二部份為聚酯纖維吸濕發熱改質及多機能性暖感織物之開發研究，於對苯二甲酸(Terephthalic acid, TPA)及乙二醇(Ethylene glycol, EG)酯化反應中添加間苯二甲酸二羥基乙酯-5-磺酸鈉(Sodium-5-s ulfobis(β-hydroxyethyl) isophthalate, SIPE)與聚乙二醇(Polyethylene glycol, PEG)以製備親水性聚酯，再以熔融紡絲製成吸濕發熱聚酯纖維。製程優化透過田口方法結合灰關聯分析法(Grey relational analysis, GRA)進行品質優化，探討改質聚酯纖維之吸濕發熱溫升、丹尼數、拉伸強度及斷裂伸長率等性質。結果顯示，最佳化吸濕發熱聚酯纖維之吸濕發熱溫升為1.3℃，拉伸強度為4.16 g/d，斷裂伸長率為44.89%，丹尼數為75.02 d/72f，表面電阻為107 Ω，證實本研究透過SIPE與PEG改質聚酯材料之親水性，能有效賦予其纖維吸濕發熱及抗靜電之機能。
最後結合兩部分纖維獲得機能性暖感織物，其性質為：遠紅外線放射率89%、發熱溫升8.1°C及表面電阻為107Ω，相較於市售發熱衣物，本研究所開發之暖感織物具有較高之發熱溫升且具有多機能性，能適用於高緯度之寒帶國家。

This series study develops a multi-functional poly(ethylene terephthalate) (PET) fabric with far-infrared function and moisture absorption heating properties for warming clothing application. The study is divided into two parts:
In Part I, polyethylene terephthalate (PET) is used as the polymer matrix, and nano germanium powder is uniformly mixed with PET by the melt blending process for modification, in order that the PET composite has far-infrared function. Afterwards, the modified PET is made into 75d/72f fully drawn yarn (FDY) by melt spinning and melt drafting. The properties of the yarn, including tensile strength, elongation at break, yarn count (in denier), far-infrared emissivity, and far-infrared heating are discussed. In order to optimize the quality of yarn in the melt spinning process, this study designs process parameters consisting of germanium powder addition, melt temperature, mold temperature, nozzle temperature, gear pump speed, and take-up speed using the Taguchi method. Then, the analytic hierarchy process (AHP) is applied to obtain the weights of each quality, which will be used in the technique for order preference by similarity to an ideal solution (TOPSIS) to obtain the optimal processing parameters for multi-quality yarn. The results show that the tensile strength of the optimized modification PET yarn is 4.84 g/d, the elongation at break is 41.26%, yarn count is 74.39d/ 72f, the far-infrared emissivity is 89% and the far-infrared heating is 6.3°C. The properties of the optimized modified yarn are obviously better than general PET yarn.
In part II, the moisture absorption heating PET yarn is made by the hydrophilic PET, and the process parameters optimization for melt spinning is presented. First, in order to improve the hydrophilicity of PET, the modified PET is polymerized by terephthalic acid (TPA), ethylene glycol (EG), polyethylene glycol (PEG) oligomers, and sodium-5-s ulfobis(β-hydroxyethyl) isophthalate (SIPE). Then, the hydrophilic PET is made into a moisture absorption heating PET yarn, specified to a 75d/72f FDY by melt spinning. The properties of this yarn including hygroscopic heating, surface resistance, tensile strength, elongation at break, and yarn count are presented. In order to improve the properties of this yarn, the Taguchi method combined with grey relational analysis (GRA) is used to obtain the optimal multi-quality process parameters for melt spinning. From experiment results, this modified yarn has excellent hygroscopic heating, surface resistance and elongation. At the same time, it is shown that the warming fabric forms from part I and this modified yarn can get the properties as far-infrared radiation of 89%, textile heating of 8.1°C and surface resistance of 107Ω. Compared with the commercially available heating clothes, the warm fabric developed by this research institute has a high heat-increasing has multi-functionality, and can be applied to a cold latitude country at a high latitude.

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