Title:
TIRE
Document Type and Number:
Japanese Patent JP2023082470
Kind Code:
A
Abstract:
To provide a tire in which the total performance of the grip performance in the time of straight travel under a high-speed travel condition and the grip performance in the time of cornering is improved.SOLUTION: A tire includes a tread part whose mounting direction to a vehicle is designated. The tread part includes an inner side tread rubber layer which constitutes a vehicle inner end side in the time of mounting to the vehicle; and an outer side tread rubber layer which constitutes a vehicle outer end side. A ratio (D/WL) of a distance D to an interface between the inner side tread rubber layer and the outer side tread rubber layer from a vehicle outer ground contact end to a distance WL between both ground contact ends is equal to or greater than 0.50. An average value tanδAin of a loss tangent tanδ at 0°C to 50°C of the inner side tread rubber layer measured under a condition of 10 Hz of a frequency, 1% of an initial strain and ±0.1% of an amplitude is equal to or less than 0.30. An average value tanδAout of the loss tangent tanδ at 0°C to 50°C of the outer side tread rubber layer measured under a condition of 10 Hz of the frequency, 1% of the initial strain and ±0.1% of the amplitude is equal to or greater than 0.40.SELECTED DRAWING: None
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Inventors:
YAMAMOTO KEISUKE
Application Number:
JP2021196276A
Publication Date:
June 14, 2023
Filing Date:
December 02, 2021
Export Citation:
Assignee:
SUMITOMO RUBBER IND
International Classes:
B60C11/00; B60C1/00; B60C5/00; B60C11/03; C08K3/04; C08K3/36; C08L21/00; C08L57/02
Attorney, Agent or Firm:
Patent Attorney Corporation Asahina Patent Office
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