TIRES
The tire design with a specialized rubber composition and optimized parameters improves crack resistance, addressing crack propagation issues in tires, enhancing durability and performance.
DE102025144484A1Pending Publication Date: 2026-06-03SUMITOMO RUBBER INDUSTRIES LTD
Patent Information
- Authority / Receiving Office
- DE · DE
- Patent Type
- Applications
- Current Assignee / Owner
- SUMITOMO RUBBER INDUSTRIES LTD
- Filing Date
- 2025-10-30
- Publication Date
- 2026-06-03
AI Technical Summary
Technical Problem
Tires are prone to develop cracks due to stress during driving and these cracks can propagate, leading to reduced performance and potential failure.
Method used
A tire design that incorporates a rubber composition with specific sulfur content, crosslinking density ratios, and thickness parameters to enhance flexural crack growth resistance, including a rubber component with isoprene-based rubber and a filler content of carbon black, optimized for improved crack resistance.
Benefits of technology
The tire composition significantly enhances flexural crack growth resistance both in new conditions and after thermal deterioration, maintaining durability and performance.
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Smart Images
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Abstract
A tire is provided comprising a sidewall, the sidewall being constructed from a rubber composition comprising a rubber component and a filler, wherein the amount of sulfur in the rubber composition is less than 0.65 wt%, wherein the ratio V of a crosslinking density of monosulfide bonds to the total crosslinking density in the rubber composition is 0.10 or more, and wherein K is 0.018 or less and V / (K × D) is 1.00 or more. when K = G / W L is defined where D represents a thickness in mm of a surface rubber layer at a position with maximum tire width, W L G represents the maximum load capacity of the tire in kg, and G represents the tire weight in kg.
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