| 摘要 |
PURPOSE: Drawn polyethylene terephthalate yarn tire cord comprising the same and a tire are provided to offer excellent shrinkage stress and modulus due to minute network generated by crystalline structure and orientation structure. CONSTITUTION: Drawn polyethylene terephthalate yarn includes polyethylene terephthalate of 90 mol% or more. A degree of crystallinity of the drawn polyethylene terephthalate yarn is 53% or greater after heat-treating the drawn polyethylene terephthalate yarn in 230°C for 1 minute. An amorphous orientation factor of the drawn polyethylene terephthalate yarn is 0.15 or less. A birefringence rate of the drawn polyethylene terephthalate yarn is 0.14 ~ 0.16. The tire cord includes a body ply(6), a cap ply(4), and a belt(5) etc. |
