上浆前处理剂对经编用棉纱性能的影响

为改善棉纱的物理性能以适应经编高速生产，对棉纱经编织造前处理技术进行研究。选择3种不同粗细棉纱及靛蓝纱为研究对象，采用低温淀粉、低温聚乙烯醇、液蜡及白油为前处理剂，测试其对４ 种棉纱上浆率、断裂性能以及毛羽性能的影响，并借助扫描电子显微镜对前处理前后纱线表面进行观察。结果表明：低温聚乙烯醇以及液蜡可以改善棉纱的毛羽性能，并有利于提高其断裂强力及断裂伸长；低温淀粉可改善毛羽性能并提高断裂强力，但可降低纱线断裂伸长；白油会造成纱线强力及断裂伸长减小；而靛蓝纱因经靛蓝染色使表面性质改变，经前处理后纱线断裂性能与其他3 种棉纱有所差异。

Influence of sizing pretreatment agent in properties of warp knitting cotton yarn

In order to improve the physical properties of cotton yarn to adapt to the high speed warp knitting production, the preteratment technology of cotton yarn were studied. Taking three kinds of cotton yarn with different fineness and indigo dyed cotton yarnas the experimental objects, the low temperature starch, low temperature PVA, lipuid-wax and white oil as the pretreatment agent, the influence of 4 kinds of pretreatment agents on sizing ratio, breaking performance and hairiness properties of 4 kinsa of cotton yarn was studied,and the yarn surface was observed by scanning electron microscope. The results show that the low temperature PVA and liquid wax can decrease the hairiness and improve the stuength of cotton yarn. The low temperature starch can improve the hairiness and the sprength, but reduce the elongation of yarn. White oil can cause the decreases of yarn strength and elongation. The change of the surface properties of indigo yarns due to indigo dyeing make them different from the other three kinds of cotton yarns after the pretreatment.