Effect of spinning speed on gradient morphology of bicomponent fibers by melt spinning

摘要

The bicomponent fibers of polyamide6/low density polyethylene (PA6/LDPE) were prepared by melt spinning. The gradient structure of fibrils’ size and distribution along radial direction in blend fibers cross-section was observed by SEM. The photos showed that the fibrils’ diameter in the central region of blend fibers was bigger than that in the surface region. And the fibrils’ areas in the central region were higher than that in the surface region from the statistics and calculation. The gradient distribution of the fibrils’ areas, diameter and number along radial direction became more obvious with the increase in spinning speed comparing the bicomponent fibers of different spinning speed from 77 to 800 m/min. This indicates that spinning speed is one of the important factors of gradient structure formed in The bicomponent fibers of polyamide6/low density polyethylene (PA6/LDPE) were prepared by melt spinning. The gradient structure of fibrils’ size and distribution along radial direction in blend fibers cross-section was observed by SEM. The photos showed that the fibrils’ diameter in the central region of blend fibers was bigger than that in the surface region. And the fibrils’ areas in the central region were higher than that in the surface region from the statistics and calculation. The gradient distribution of the fibrils’ areas, diameter and number along radial direction became more obvious with the increase in spinning speed comparing the bicomponent fibers of different spinning speed from 77 to 800 m/min. This indicates that spinning speed is one of the important factors of gradient structure formed in bicomponent fibers.