METHOD FOR MANUFACTURING FLUORESCENT POLYPROPYLENE DOPE DYED YARN AND DOPE DYED YARN MANUFACTURED BY SAME

摘要

The present invention relates to a method for manufacturing fluorescent polypropylene dope dyed yarn and dope dyed yarn manufactured by the same. Specifically, the method for manufacturing fluorescent polypropylene dope dyed yarn comprises: a step of preparing a polypropylene monomer and a fluorescent master batch containing 0.1-20wt% of a fluorescent pigment; a melting step of dosing the fluorescent master batch after injecting the polypropylene monomer into an extruder, and melting the fluorescent master batch; an extrusion step of supplying a melted matter to a spin pack connected to a spinneret at a pressure of 60-80 kg/cm^2 by a gear pump and extruding the melted matter; a radiating step of obtaining undrawn yarn by injecting the melted matter melted and extruded to the spin pack and discharging the melted matter under the conditions of a nozzle pressure of 120-160 kg/cm^2, a radiation temperature of 190-290°C, and a radiation speed of 2,000-4,000 m/min; a quenching step of cooling the undrawn yarn radiated; a drawing step of supplying the undrawn yarn completely cooled to multiple drawing rollers and drawing the undrawn yarn at multiple stages; and a winding step of winding the dope dyed yarn drawn on a winding roll under the condition of a winding speed of 3,200-4,000 m/min.;COPYRIGHT KIPO 2018