Abstract
Tires might be the first technically significant composite out of rubber and play a vital role in the overall performance of a car. The essential functions of a tire rely to a great extent on the properties of tire cords. Polyester and nylon cords make up the majority of synthetic fibers used in tires. A new kind of polyester cord has been developed combining the performance characteristics of both polyester and nylon cords. This article examines the dynamic mechanical properties of this nylon-like polyester tire cord by adopting dynamic mechanical analysis, Instron, and DISC fatigue experiments, as well as its dynamic adhesion property using flex fatigue experiment. It demonstrated that the dynamic complex modulus of the nylon-like polyester cord was higher than that of nylon 6 cord but lower than that of standard polyester cord, which was a favorable characteristic when it came to replacing nylon 6 cord with nylon-like polyester cord in tires. Under cyclic loading, hysteresis loss of nylon 6 cord > nylon 66 cord > nylon-like polyester cord > standard polyester cord was observed. In the DISC experiment, nylon-like polyester had a similar compression resistance property to that of nylon 6 cord. At a temperature below 85°C, nylon-like polyester cord maintained roughly the same level of residual ratio of dynamic adhesion, but beyond this temperature point, nylon 6 exhibited a better performance.
Highlights
Textile fiber–reinforced rubber composites have been available in many applications, such as hoses, transmission belts, conveyor belts, and pneumatic tires
Representative stress–strain curves are depicted in Figure 5, and data/CV derived from the elongation of 5% (LASE-5) was adopted as a way to evaluate the modulus of tire cords[16] Higher values of LASE-5 indicate a higher modulus, which in turn is a desirable characteristic of tire cords
This favorable characteristic of the newly designed nylon-like polyester tire cord resulted from the combination of distinctive mechanical properties of both nylon and polyester cords.[3]
Summary
Textile fiber–reinforced rubber composites have been available in many applications, such as hoses, transmission belts, conveyor belts, and pneumatic tires. Polyester tire cord has good attributes such as high modulus and low thermal shrinkage, but poor adhesion and shock absorbance.
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