| 摘要 |
The present invention relates to an aramid tire cord with a superior initial modulus change rate, a tensile strain and an initial modulus, and a manufacturing method thereof. The present invention provides an aramid tire cord containing an aramid multi-filament, wherein the initial modulus change rate after repetitive stretch tests performed at 10 times the load of 10% of the cutting strength at 120?, is 5% or lower, and a manufacturing method thereof. The aramid tire cord of the present invention exhibits an excellent initial modulus change rate, a tensile strain and an initial modulus retention at a high temperature, and thus has an excellent fatigue resistance as the aramid tire cord has an optimum modulus and a crystallization constant value and a crystallization orientation constant. Accordingly, the aramid tire cord of the present invention prevents degradation of physical properties and improves travel performance even under high speed travel for long durations with a high temperature and high pressure conditions, when the aramid tire cord is used as a reinforcement material for a tire. |
