Heavy duty pneumatic tire
A technology for pneumatic tires and tires, which is applied to tire parts, tire treads/tread patterns, transportation and packaging, etc. It can solve problems such as peeling, uneven rubber layer exposure, and damage to wet performance, and achieves good groove arrangement , Improving traction performance and driving stability, the effect of improving traction performance
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Embodiment approach 1
[0205] The manufacturing size is 11R22.5 and has figure 1 The heavy-duty pneumatic tire with the tread pattern shown (Table 1), and the corresponding performance was evaluated. The evaluation results are shown in Table 3. In this regard, the r coefficients are listed in Table 2.
[0206] The various test conditions shown in Table 1 are as follows. In each test, the rim size is 7.50×22.5, the internal pressure is 800kPa, and the vehicle used is a 10-ton 2-D vehicle with a daily capacity of 10 tons (half-load loaded on the front half of the carriage).
[0207] (1) Wetland rotation performance
[0208] Location: Okayama test track of Sumitomo Rubber Industries, Ltd.
[0209] Method: The time to run one lap on a track with a radius of 30 meters in the wetland state is expressed as the reciprocal of the ratio with respect to Comparative Example 1. The value of Comparative Example 1 is defined as 100, and the larger the value, the more advantageous.
[0210] (2) Wetland traction perform...
Embodiment approach 2
[0229] The manufacturing size is 11R22.5 and has figure 1 A heavy-duty pneumatic tire with the tread pattern shown and the corresponding performance evaluated. The evaluation results are shown in Table 4. The various test conditions shown in Table 4 are as follows. In each test, the rim size is 7.50×22.5, the internal pressure is 800kPa, and the vehicle used is a 10-ton 2-D4 vehicle (the half-load is loaded on the front half of the carriage).
[0230] (1) Wet grip performance
[0231] Location: Okayama test track of Sumitomo Rubber Industries, Ltd.
[0232] Method: The time to run one lap on a track with a radius of 30 meters in the wetland state is expressed as the reciprocal of the ratio relative to Comparative Example 1. The value of Comparative Example 1 is defined as 100, and the larger the value, the more advantageous.
[0233] (2) Partial wear resistance
[0234] Driving distance: 40,000km
[0235] Evaluation method: Under a constant load (10t) load condition, a 2-D4 box t...
Embodiment approach 3
[0239] According to the specifications in Table 5, the size is 11R22.5 and has figure 1 The heavy-duty pneumatic tire with the tread pattern shown, and the snow performance and wet performance of the tires of the examples were evaluated in the new product state, the 50% wear state, and the 90% wear state. The results are shown in Table 5.
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