Abstract: Based on the analysis of yarn index and weaving difficulties of 9.7 tex high-count colored spun yarn, the paper pointed out that its difficulties were mainly due to poor yarn strength, hairiness and abrasion resistance, which caused several times of machine stoppage, as well as low weaving efficiency. Based on the characteristics of high-count colored spun yarn, the sizing index and the yarn quality of the loom beam are improved by the process improvement, including, the sizing pressure, the concentration of the sizing and the temperature, as well as the optimization of the sizing formula. By adjusting the parameters of washing of warp beam, humidification of weft yarn and weaving process, the problem of warp yarn breakage and frequent machine stoppage due to weft problems are solved, thus, improving weaving efficiency.

Key words: high-count colored spun yarn; single yarn strength; hairiness index; sizing formula; wet dividing rod; loom tension