Abstract:

In order to investigate the influence of the oxidation bleaching condition on black yak fiber properties and spinnabilities. Firstly, the oxidation bleaching condition of black yak fibers was optimized by orthogonal experiment, and the optimum oxidation bleaching condition were presented, hydrogen peroxide concentration 25 g/L, sodium pyrophosphate concentration 5 g/L, temperature 75 ℃, time 90 min and PH value of the solution 8.5. Secondly, by comparing the bleached fiber properties with unbleached fibers, 20.83 tex yak fiber yarns was spun on the condensed compact spinning system and the four rollers lattice apron compact spinning system, and the spinnabilities of bleached yak fibers were studied further. The results show that after bleaching, the physical and mechanical properties of yak fibers decreased and the scales of bleached yak fibers were damaged. When the same count yarns were spun on the same spinning system, the evenness, strength and elongation performances of bleach yak fiber yarns were poorer than unbleached. When the same count yarns were spun on different spinning systems, the evenness of bleached yak fiber yarns spun on the condensed compact spinning system were better that spun on the four rollers lattice apron compact spinning system, but the strength and elongation performances were poorer.