Green tires and tire manufacturing methods

JP2026109772APending Publication Date: 2026-07-02BRIDGESTONE CORP
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
BRIDGESTONE CORP
Filing Date
2024-12-20
Publication Date
2026-07-02

AI Technical Summary

Technical Problem

Existing tire manufacturing methods risk damaging communication devices like RFID tags due to rubber flow during vulcanization molding, and the exposed rubber may decrease strength, durability, and cause design issues.

Method used

A green tire design with a communication device covered by a covering rubber layer and a reinforcing rubber layer, where the dielectric constant of the covering rubber layer is lower than that of the reinforcing layer, and the reinforcing layer is 0.7 mm to 3.0 mm thick, with a step difference of 3.0 mm or less between the layers, to prevent damage and improve communication performance.

Benefits of technology

The solution ensures the communication device is protected from damage and exposure, maintaining its performance and durability while preventing rubber flow during vulcanization.

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  • Figure 2026109772000001_ABST
    Figure 2026109772000001_ABST
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Abstract

To provide a green tire that is advantageous for manufacturing tires in which a communication device installed inside the tire improves its communication performance, while the RFID within the communication device is not damaged or exposed on the tire surface. [Solution] The communication device 6 on the surface of the green tire includes an RFID and a covering rubber layer 61 that covers at least the outer side of the RFID on the green tire, and further includes a reinforcing rubber layer 62 that covers the outer side of the covering rubber layer on the green tire, and the dielectric constant of the covering rubber layer is made smaller than the dielectric constant of the reinforcing rubber layer.
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