Polyethylene-2,6-naphthalate fibers using stress-strain curve, and process for preparing the same

摘要

The invention POY's force-strain curve and fine structure by controlling the stretching step to improve the elongation in high strength relates to a polyethylene-2,6-naphthalate fiber, the intrinsic viscosity of the polyethylene-2,6-0.80 ~ 1.2 by melt extruding through a spinneret naphthalate chip was passed through an appropriate heating section under the spinneret and then cooled and solidified by using the cooling gas and, and less than 5% elongation when POY Saga been subjected to the initial stress of 0.5g / d, has an initial modulus of 20 to 100g / d, when the are at 2.0g / d at least 60% elongation force-strain curve has a, step of winding the yarn in the spinning speed to so that the birefringence of 0.02 to 0.20, and relates to the wound yarn in the polyethylene-2,6-naphthalate of 1000 to 3000 denier are less than 2.5, and mystery chongyeon prepared by a process comprising the step of multi-stage stretching. ; In live high strength industrial polyethylene-2,6-naphthalate of the present invention, shows a low shrinkage, treated cord formed therefrom may be useful as a reinforcement of rubber products including tires, because of the excellent shape stability and strength.; Polyethylene-2,6-naphthalate, and high tenacity, high-speed spinning, the force-deformation curve, the tire cord