Side-Reinforced Run-Flat Tire Adhesive Segmentation
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Solution Overview
Problem
Conventional side-reinforced run-flat tires face challenges in reducing cavity resonance sound and making it difficult to confirm the history of run-flat running due to the presence of short fibers on the tire inner surface, which also lead to heat-induced deterioration of the reinforcing rubber.
Innovation Solution
Adjusting the heatproof temperature of the adhesive layer bonding short fibers to the tire inner surface to a range of 50-100°C, allowing for easy detachment and reducing heat-related deterioration, while optimizing the distribution and density of short fibers to enhance sound absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If numerous short fibers are bonded to the tire inner surface to reduce cavity resonance sound, then the sound absorption effect is improved, but the visibility to confirm run-flat running history deteriorates
Solution Approach 1:
The adhesive layer is segmented into two distinct types: a first adhesive layer with high heat resistance (above 100°C) for bonding short fibers in the tread portion to reduce sound, and a second adhesive layer with low heat resistance (50-100°C) for bonding short fibers in the sidewall portion to enable visual confirmation of run-flat history through detachment.
2Object-generated harmful factors
If numerous short fibers are bonded to the tire inner surface to reduce cavity resonance sound, then the sound absorption effect is improved, but heat-induced deterioration of reinforcing rubber worsens
Solution Approach 1:
The adhesive layer is segmented into two distinct types: a first adhesive layer with high heat resistance (above 100°C) for bonding short fibers in the tread portion to reduce sound, and a second adhesive layer with low heat resistance (50-100°C) for bonding short fibers in the sidewall portion to enable visual confirmation of run-flat history through detachment.
Solution Approach 2:
Different regions of the tire inner surface are treated with different adhesive properties: the tread portion uses heat-resistant adhesive to maintain fiber bonding under high temperature, while the sidewall portion uses heat-sensitive adhesive that allows fiber detachment as an indicator of run-flat exposure.
3Object-generated harmful factors
If the adhesive layer has high heat resistance to maintain fiber bonding during normal running, then the sound absorption effect is maintained, but the ability to confirm run-flat running history deteriorates
Solution Approach 1:
The adhesive layer is segmented into two distinct types: a first adhesive layer with high heat resistance (above 100°C) for bonding short fibers in the tread portion to reduce sound, and a second adhesive layer with low heat resistance (50-100°C) for bonding short fibers in the sidewall portion to enable visual confirmation of run-flat running history through detachment.
4Ease of operation
If the adhesive layer has low heat resistance to enable detection of run-flat running, then the confirmation of run-flat history is improved, but the sound absorption effect deteriorates
Solution Approach 1:
The adhesive layer is segmented into two distinct types: a first adhesive layer with high heat resistance (above 100°C) for bonding short fibers in the tread portion to reduce sound, and a second adhesive layer with low heat resistance (50-100°C) for bonding short fibers in the sidewall portion to enable visual confirmation of run-flat running history through detachment.
Solution Approach 2:
Different regions of the tire inner surface are treated with different adhesive properties: the tread portion uses heat-resistant adhesive to maintain fiber bonding under high temperature, while the sidewall portion uses heat-sensitive adhesive that allows fiber detachment as an indicator of run-flat exposure.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Facilitates the confirmation of run-flat history, prevents heat-induced deterioration, and effectively reduces cavity resonance sound during both run-flat and normal tire operation.
Implementation Method 1
short fibers bonded, via an adhesive layer, to at least a portion of a region of a tire inner surface
Implementation Method 2
reducing, during normal running, cavity resonance sound by the short fibers
Data Source
AI summary
Provided is a side-reinforced run-flat tire including a tread portion, a pair of sidewall portions extending on both sides of the tread portion, and reinforcing rubber provided in the sidewall portions, the side-reinforced run-flat tire further including: short fibers bonded, via an adhesive layer, to at least a portion of a region of a tire inner surface that is located in each of side portions, wherein the adhesive layer has a heatproof temperature of from 50 to 100° C.