Tire

The tire design with hydrogenated styrene-butadiene rubber and recycled carbon black in the tread and sidewall portions addresses hardening issues, improving durability and fuel efficiency by reducing heat generation and rigidity differences.

JP2025112882APending Publication Date: 2025-08-01SUMITOMO RUBBER INDUSTRIES LTD
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Patent Information

Application Number
JP2024007405
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-01-22
Publication Date
2025-08-01

AI Technical Summary

Technical Problem

Tires experience performance deterioration due to hardening over time, particularly in the tread portion, which affects durability and fuel efficiency, and there is a need for improved comprehensive performance in these areas.

Method used

A tire design incorporating a rubber composition for both the tread and sidewall portions that includes hydrogenated styrene-butadiene rubber, with specific styrene content, land ratio, and thickness ratios to minimize rigidity differences and heat generation, using recycled carbon black to reduce friction and heat, and optimizing acetone extraction amounts and Shore hardness to enhance durability and fuel efficiency.

Benefits of technology

The tire design improves durability and reduces fuel consumption by minimizing heat generation and rigidity differences, leading to enhanced performance over time.

✦ Generated by Eureka AI based on patent content.

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Abstract

To provide a tire improved in total performance of durability performance and low fuel consumption performance after deterioration.SOLUTION: This tire comprises: a tread; and a side wall. The tread and the side wall are composed of rubber-containing rubber compositions including hydrogen added styrene-butadiene rubber. L is 0.60-0.90 inclusive, and (St1+St2)×T×L / 100 is 1.4 or less, in which St1 (mass %) denotes a total styrene amount of the rubber component constituting the tread; St2 (mass %) denotes a total styrene amount of the rubber component constituting the side wall; L denotes a land ratio; and T (mm) denotes the thickness of a rubber layer constituting the side wall.SELECTED DRAWING: None
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Citation Information

Patent Citations

  • Pneumatic tire

    JP2005067236A