Tire

CN115107417BActive Publication Date: 2026-04-14SUMITOMO RUBBER INDUSTRIES LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SUMITOMO RUBBER INDUSTRIES LTD
Filing Date
2022-03-10
Publication Date
2026-04-14

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Abstract

The present application provides a tire (2) capable of preventing wear from significantly reducing wet performance and achieving a reduction in rolling resistance. The tire (2) has a tread (4) with a cap layer (38) constituting a portion of the outer surface of the tire (2), a base layer (40) located radially inside the cap layer (38), and an intermediate layer (42) located radially between the cap layer (38) and the base layer (40). The tangent of the loss angle of the intermediate layer (42) at 30°C is lower than the tangent of the loss angle of the cap layer (38) at 30°C, and the tangent of the loss angle of the base layer (40) at 30°C is lower than the tangent of the loss angle of the intermediate layer (42) at 30°C. The tread (4) includes at least two three-layer portions (44) composed of the cap layer (38), the intermediate layer (42), and the base layer (40), and at least one two-layer portion (46) located between a first three-layer portion (44a) and a second three-layer portion (44b) and composed of the cap layer (38) and the base layer (40).
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Citation Information

Patent Citations

  • Pneumatic tire

    JP2017210044A

  • Pneumatic tire

    JP2015131599A

  • Tire with tread having an intermediate rubber layer containing a microsphere dispersion

    US20090255613A1