Influence of yarn structure, sizing ingredients and type of sizing on properties and performance of sized yarns: Part II-A comparative study of sized yarn performance<span style="font-size:14.0pt;font-family: HiddenHorzOCR;mso-hansi-font-family:"Times New Roman";mso-bidi-font-family: HiddenHorzOCR;color:#292929"> for ring- and rotor-spun cotton yarns </span>

Abstract

A comparative study on influence of structural differences of ring- and rotor-spun cotton yarns on the process of sizing and the performance of sized yarns against abrasion has been carried out using the 6s and 16s ring and rotor yarns sized with cold and hot brand PVA at different concentrations (9%, 7% and 5%) and drying rates (70°C and 140°C). It is observed that, in general, the abrasion resistance of rotor yarns is better than that of ring yarns. The rotor yarns give better abrasion resistance at 140°C because the higher temperature reduces size migration from inside to surface of the yarn, thereby ensuring more uniform deposition of size along the cross-section of the yarn. A better size distribution reinforces the open structure of rotor yarns and improves cohesion.