Abstract:

For studying the influence of yarn formation process on properties of knitted fabrics made of air jet vortex-spun bamboo pulp colored yarns, based on tye Box-Behnken design method and by means of the Minitab16 software,  and the influence of formation process (nozzle pressure, yarn linear density, and yarn delivery speed) of air jet vortex spinning on breaking strength, breathability, draping property and abrasive resistance of knitted fabrics made of air jet vortex-spun bamboo pulp colored yarns were analyzed and discussed. The results showed that decreasing yarn linear density makes knitted fabrec′s breakingstrength decrease, and makes breathability and draping property increase first and then decrease slightly. With yarn delivery speed increasing, the breaking strength and breathability of knitted fabric are decreasing, but draping property is increasing. Nozzle pressure has no significant influence on knitted fabric’s breaking strength, breathability and abrasive resistance. However, the draping property of knitted fabric increases first and then decreases when nozzle pressure is increased. Knitted fabric’s abrasive resistance is mainly influenced by yarn delivery speed and yarn linear density, but its influence mechanism is rather complicated.

Key words: air jet vortex spinning, colored spun yarn, process parameter, bamboo pulp fiber, knitted fabric, property