Abstract:

Aiming at the problem of weaving with greater sizing add-on rate in existing textile enterprise, the different size formulations were adopted to size cotton yarns and the sizing add-on rate, moisture regain and mechanical property were tested. The sized yarns woven in the actual production. The warp and weft stops, weaving efficiency were counted. The performance and morphological structure of sizing membranes, the influences of sizing recipe components on morphological structure of sizing membranes and phase separation of sizing solution were investigated, and it is believed that this might be the reason why greater add-on rate of existing sizing materials are required to meet the requirements of high speeding weaving. Based on the above analysis, the principles of design sizing recipes for high performance cotton yarns of low sizing add-on rate are proposed, and weaving processability of cotton yarns using an optimised sizing formulation composed of polyvinyl alcohol and modified starch Kollotex A115 at a ratio of 37.5：62.5 for low sizing add-on rate of 5.5%~6.8% are reported to ease the burden of dyeing pretreatment.

Key words: low size add-on, morphological structure, weaving, phase separation, size recipe