Pneumatic radial tire
A radial tire and reinforcing cord technology, applied in the reinforcement layer, tire parts, transportation and packaging of pneumatic tires, can solve the problems of increased bite and reduced high-speed durability, to prevent damage and improve high-speed durability. sex, improve durability
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Embodiment 1~8
[0030] Make 12 kinds of pneumatic radial tires (embodiment 1~8, conventional example 1,2, comparative example 1~2): its common condition is that tire size is 205 / 50R17, has figure 1 The aspect of the tire structure using polyethylene terephthalate yarn as the reinforcing cord of the belt reinforcing layer; and the length L protruding from the end of the belt reinforcing layer with the largest width after vulcanization molding ( mm) and the intermediate elongation E (%) of the reinforcing cord at a load of 67 N are different as shown in Table 1.
[0031] For these 12 kinds of pneumatic radial tires, road noise and high-speed durability were measured by the following experimental method, and the results were made into an index with the measurement result of the tire of Conventional Example 1 as 100, and were shown in Table 1 (index value Larger means better). As can be seen from the results in Table 1, the tires of Examples 1 to 8 are all excellent in both road noise and high-s...
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