POLYESTER TIRE CODE WITH IMPROVED HEAT RESISTANCE AND TIRE COMPRISING THE SAME

摘要

The present invention is composed of polyester yarn, 5% LASE measured by ASTM D885 at 80°C is 1.2 g/d or more, and 5% LASE measured by ASTM D885 at 120°C is 1.0 g/d or more, It relates to a polyester tire cord, characterized in that the toughness retention at 80°C and 120°C is 65% or more, and the tire cord of the present invention has an elastic modulus equivalent to rayon even in a high temperature environment of 120°C or higher, and dimensional stability and heat resistance This is excellent and can be advantageously applied to high performance tires.