对测试转杯纱捻度的几种退捻加捻法的实验分析

选用了不同号数、不同设计捻度的棉转杯纱１２种，分别采用一次退捻加捻法、二次退捻加捻法、三倍退捻加捻法、二重法测试棉转杯纱的捻度。从棉转杯纱捻度测试结果可看出，相对于设计捻度，三倍退捻加捻法的测试误差最小，其次是二次退捻加捻法和二重法，一次退捻加捻法的测试误差最大。

The Experimental Analysis of the Untwist Retwist Methods in Determining the Twist of OE Yarn

kinds of cotton OE yarns with different machine twist levels and yarn linear densities were tested, by way of once back twisting and twisting, twice back twisting and twisting, triple twisting, and double twisting, so as to determine the twist of OE yarns. The results show that the triple twisting method presents the minimum difference between actual twist and designed machine twist and then the twice back twisting and twisting and the double twisting, and that the largest difference is with the once back twisting and twisting method.