POLY(ETHYLENETEREPHTHALATE) TIRE CORD, AND TIRE COMPRISING THE SAME

摘要

PURPOSE: It continues, the repetitively sudden temperature change, the load variation or the change of speed etc. is added. The stability and the durability are improved, the whole load of the vehicles can be supported steadily. CONSTITUTION: A polyethylene terephthalate tire cord comprises; With a strain(S) when adding the load of 1kgf after reiterating the tension strength test in which the load of 2g/de was added at 20°C and which extended and in which the load was eliminated and recovered 4 times, the difference of an initial strain(So) in adding the load of 1 kgf before the tension test is 0.5% or less. With a strain(S') when adding the load of 1 kgf after reiterating the tension strength test in 120°C 4 times, the difference of an initial strain(S'o) when adding the load of 1kgf before the tension test is 0.5% or less. After the tension strength test at 20°C strain(S) is 0.75~0.95 %.