Method for producing a polyethylene terephthalate drawn yarn , polyethylene terephthalate drawn yarn and tire cord

摘要

The present invention , the production of drawn yarn which allows the production of polyethylene terephthalate drawn yarn without lowering of physical properties and yarn breakage during the manufacturing process , while showing the form stability and superior strength , with abig 2000 denier or more polyethylene terephthalate drawn yarn methods , obtained therefrom , and a tire cord . Comprises at least 90 mol% polyethylene terephthalate , the polymer 0.8 intrinsic viscosity to the 1.5 , 0.1 to the method for producing the polyethylene terephthalate drawn yarn is added polyamide resin 2.0 wt % comprising the steps of , in the spinning mode twisting four spinning or twisting three polymer mixture is added the polyamide resin , no 2500 through a spinneret toof 2000 denier or more by melt spinning at a speed of 4000m / min forming an undrawn yarn having no 1.4 undrawn yarn to and including the steps of stretching at a draw ratio of 2.4 times .