This paper analyses the causes and influencing factors of yarn residual torque,while the influencing factor and improvement method of stitch distortion are also be discussed.It takes Nu-torque yarn and low hairness & torque yarn for example to illustrate the functions of these two new yarns in reducing stitch distortion of jersey fabric.This paper shows that present main methods of reducing yarn residual torque are setting processing method and physical balance method.

This paper introduces the property requirements of cotton yarns for knitting usage,analyzes and discusses the spinning technique properties and application of Sirospun yarns,Solospun yarns,compact yarns,Nu-torque yarns and low hairness & torque yarns respectively.

Negative ion fibers and textiles play an important role in health care of people. This article introduced the forming mechanisms, function, and source of raw materials of the negative ion. And then the production process, test methods, evaluation and application of the negative ion fibers and textiles were described.