Patent ID: 7951315

Claim:
A method of manufacturing a polyvinyl chloride (PVC) fiber for artificial hair, comprising the steps of: melt spinning a PVC resin composition with a nozzle having a nozzle hole of a diameter D and a land length L, and a nozzle leading portion having a cone angle, wherein a ratio of L/D is 1-3, a height of the nozzle leading portion is at least 4 mm, and the cone angle is 20°-90°; and discharging the PVC resin composition with an amount of 65-165 g/h per nozzle, wherein the discharged PVC resin composition produces the PVC fiber for artificial hair, and the nozzle is designed to discharge the PVC fiber having a section specified by (L*Mmax)/S of 4.2-7.0, where Mmax(mm) is the maximum line segment, S(mm 2 ) is a sectional area, and L(mm) is a length of an outer circumference of the PVC fiber.