- 期刊
彈性包芯紗機械性質及應力─應變曲線之分析
Curve of Spandex Elastic Core Spun Yarns
摘要
彈性纖維與一般纖維相較之下，有較低的強度，為改善此一缺點，本篇研究係以環錠精紡機及自行設計組裝之拉伸機構，將聚酯／嫘縈短纖包覆彈性絲(spandex)，紡製成彈性芯紗，以提高彈性絲之強度。在製程中，我們變化彈性絲的拉伸羅拉道數及拉伸倍數，並測試彈性芯紗之偏心率及進行強伸度之物性探討，分析其中之相關性。彈性包芯紗偏心率受拉伸道數及拉伸倍數影響。拉伸道數愈多，拉伸倍數愈大，其偏心率愈小，則彈性芯紗最大斷裂強度愈大，最大斷裂伸度愈小；反之，則結果相反。我們期望聚酯／嫘縈短纖能以較低的偏心率，完全將彈性絲包覆於內，並結合聚酯／嫘縈短纖及彈性絲的優點，以製成高性能之複合紗。將彈性芯紗之應力─應變曲線作分析，以了解拉伸道數及拉伸倍數對彈性芯紗強、伸度性質之影響，作為日後依不同用途而選用芯紗之依據。
並列摘要
The tenacity of spandex was lower than the general fiber. In order to improve this disadvantage, we studied that spandex was covered with polyester / rayon fiber, and produced spandex core spun yarns by using the modified ring spinning frame and our drawing machine to enhance the tenacity of yams. During the process, we changed the roller drawing stage and drawing ratio. Then we measured the modulus of bias, tenacity and elongation of spandex core spun yams. Finally we discussed and analyzed the correlation between them. Effect of drawing stage and drawing ratio on the modulus of bias of spandex core spun yarns was studied in this article. When drawing stage and drawing ratio increased, the modulus of bias of yams decreased, and the maximum breaking tenacity of spandex core spun yarns increased, but the maximum elongation at breaking decreased. However, when drawing stage and drawing ratio decreased, the result was opposite. We expected spandex could be covered with the staple fiber completely with lower modulus of bias and produced high performance composite yams applied to the advantage of T / R and spandex. We analyzed stress-strain curve of spandex core spun yams to understand effect of various drawing stage and drawing ratio on tenacity and elongation of yams. To select various condition of elastic core spun yarns for different end-use according to stress-strain curve of yams in future.