The invention belongs to the technical field of chemical
fiber processing, and particularly relates to a preparation method of
moisture-absorbing sweat-releasing antibacterial
polyester filament, including the steps of (1), pre-crystallizing
polyester chips in a crystallizer, venting and
drying the pre-crystallized
polyester chips; (2), subjecting silver
powder to
coating treatment to obtain the silver
powder of which the surface is coated with SiO2 and having the grain size being 3-20 micrometers; (3), mixing and melting the polyester chips and the coated silver
powder by regulating a screw extruder and an output
injection pump; (4), feeding a melt obtained by mixing and melting into a
spinning box,
spinning by extruding in a
spinning assembly through a
metering pump to obtain slivers incross structure; (5), subjecting the slivers to cooling by ring air, drafting, elasticizing, winding and packaging finally. Since the silver powder is coated, aggregation of the silver powder is reduced, the polyester
fiber has better antibacterial performance, and the silver powder in the
fiber is not easy to come off.