| Summary: | 碩士 === 國立臺灣科技大學 === 高分子工程系 === 92 === To study the influence of distinct cotton fibers on OE yarn quality and pilling of knitted fabrics, the nine kinds of cotton had been selected as materials to produce 20Ne OE yarn by a yarn spinning quick system. Then, we measure the OE yarn properties to evaluate the correlation between fiber properties and the OE yarn qualities. The result showed that the better OE yarn quality comes from the superior cotton fiber, such as longer and finer fiber with reach maturity. To synthesize the comparisons with the statistics of yarn properties issued by Zellweger USTER Ltd. in 2001, the best quality of 20Ne OE yarn is equal to the world 50%.
According to CNS 8040 L3140, we use an ICI type Pilling Tester to proceed the pilling test of the plain-knitted fabrics with 70×22courses /in. The results showed that the pill formation rate depends remarkably on the fiber fineness. The coarser fiber has lower tendency to pill. The knitted fabric made of cotton fiber with reach maturity results in decrease of the pill formation rate. As regards the influence of the fiber length on the pilling, the longer the staple, the less pilling was observed. However, when the fineness is smaller than 4.0 mg/in, the increase of the ratio of length to diameter enhances the effect of the fiber flexibility, resulting in raising the pilling tendency. In addition, the higher-tenacity fiber is not easy to occur the pills during the abrasion procedure. But when the fiber fineness is smaller than 4.0 mg/in, the fibers are prone to bending, resulting in tendency to pill. The breaking elongation also contributed to pill. Finally, break strength controlled the pill-break-off stage.
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