Pneumatic Tire Sensor Bonding With Controlled Release Agent Silicon
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Solution Overview
Problem
Existing methods for bonding sensor units to tire inner surfaces in pneumatic tires face issues of poor adhesiveness due to release agents, leading to peeling and degradation of air retention properties.
Innovation Solution
A pneumatic tire design with a sensor unit fixed via an adhesive layer, using a release agent with 0.1 wt% to 10.0 wt% silicon, and optionally a laser removal process, ensures enhanced adhesiveness and air retention by controlling the amount of release agent applied to the tire inner surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a release agent is applied to the tire inner surface to prevent bonding of the green tire and bladder, then the green tire can be vulcanized without bladder adhesion, but the adhesiveness between the tire inner surface and sensor unit becomes poor causing easy peeling
Solution Approach 1:
The release agent is applied to the tire inner surface before vulcanization to prevent bladder adhesion, and the sensor unit is fixed after vulcanization when the release agent has already served its purpose. This preliminary action allows the release agent to fulfill its function during vulcanization without interfering with subsequent sensor unit adhesion.
Solution Approach 2:
The patent specifies a controlled amount of release agent (0.1-10.0 wt% silicon) to provide just enough prevention of bladder adhesion while minimizing interference with sensor unit bonding. This prior cushioning approach balances the protective function against excessive interference with subsequent operations.
2Strength
If the tire inner surface is buffed to remove the release agent, then the adhesiveness for sensor unit bonding is improved, but the gauge of the innerliner is reduced degrading air retention properties
Solution Approach 1:
Instead of mechanically removing the release agent through buffing which damages the innerliner, the patent extracts only the necessary amount of release agent functionality by controlling its initial application quantity. The release agent remains on the surface but in controlled amounts that allow bonding without requiring removal.
Solution Approach 2:
The patent replaces the mechanical buffing process with a chemical control approach - precisely controlling the amount of release agent applied (0.1-10.0 wt% silicon). This substitution eliminates the need for mechanical removal that damages the innerliner while achieving the desired bonding conditions.
3Strength
If a film is bonded to the tire inner surface in advance and then peeled after vulcanization to remove the release agent, then the adhesiveness is improved, but the air retention properties are degraded
Solution Approach 1:
The patent extracts the essential function of release agent removal by controlling the initial application amount rather than using a film peeling process. This eliminates the need for post-vulcanization film removal that damages the innerliner and compromises air retention.
Solution Approach 2:
The release agent quantity is preliminarily controlled at the application stage (0.1-10.0 wt% silicon) to ensure it serves its protective function during vulcanization but does not interfere with subsequent sensor unit bonding. This preliminary control eliminates the need for later removal actions.
4Strength
If the tire inner surface is cleaned to remove the release agent, then the adhesiveness is improved, but the release agent cannot be sufficiently removed
Solution Approach 1:
The patent changes the parameter of release agent quantity from high to low (0.1-10.0 wt% silicon), transforming it from a substance that requires removal to one that can remain on the surface without interfering with sensor unit bonding. This parameter change eliminates the need for cleaning operations.
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
The solution provides improved adhesiveness and maintains air retention properties while allowing easy installation and durability of the sensor unit, with reduced peeling and extended bladder life.
Implementation Method 1
at least one sensor unit fixed to a tire inner surface via an adhesive layer
Implementation Method 2
a release agent is applied to the inner surface of the green tire to prevent bonding of the green tire and the bladder
Implementation Method 3
An amount of silicon in a release agent detected by fluorescent X-ray analysis
Data Source
AI summary
Provided are a pneumatic tire and a method for manufacturing the same. At least one sensor unit including a sensor that acquires tire information is fixed to a tire inner surface via an adhesive layer, and an amount of silicon in a release agent detected by fluorescent X-ray analysis at least in a fixing region for the sensor unit is from 0.1 wt % to 10.0 wt %.