Patent ID: 9359696
Filing Date: 2016-06-07
CPC Classification: B60C,D01D,D01F,D02G,D02J,D10B

Claim Text:
1. A method for manufacturing a poly(ethylene terephthalate) drawn fiber, comprising the steps of: adding a polyamide-based resin to a polymer including 90 mol % or more of poly(ethylene terephthalate), wherein the polyamide-base resin is added in an amount of 0.1 to 2.0 wt % based on the weight of the poly(ethylene terephthalate); melt-spinning the polyamide-based resin-added polymer mixture through a spinneret at a speed of 2500 to 4000 m/min in a three- or four-ply spinning manner so as to produce an undrawn fiber having a fineness of 2000 denier or more; and drawing the undrawn fiber with a drawing ratio of 1.4 to 2.4, wherein the polymer including 90 mol % or more of poly(ethylene terephthalate) has an intrinsic viscosity of 0.8 to 1.5, and wherein the polyamide-based resin includes nylon 6 or nylon 66.