Patent ID: 6329053
Filing Date: 2001-12-11
Classification: B60C,D02G,Y10T

Abstract:
Polyester filamentary yarn for tire cords, which comprises at least 90 mol % of polyethylene terephthalate and has an intrinsic viscosity of 0.70-1.2 and a tenacity of 5.5-8.5 g/d with an intermediate elongation difference (E1-E0) between intermediate elongations E0 and E1 amounting to 6% or greater, wherein the intermediate elongation E0 and E1 amounting to 6% or greater, wherein the intermediate elongation E0 is the elongation under a load of 4.5 g/d, the intermediate elongation E1 is the elongation under a load of 4.5 g/d after conducting a thermal treatment at 177.degree. C. for 10 min under a load of 0.01 g/d, and the yarn has an amorphous orientation function (fa) more than 0.65 fa.