Tire Resin-Metal Composite Structure Against Ester-Bond Hydrolysis
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Solution Overview
Problem
Resin materials with ester bonds, commonly used in tires, deteriorate under high-temperature and high-moisture environments due to hydrolysis, leading to reduced tire durability.
Innovation Solution
A resin-metal composite member for tires is developed, comprising a metal member coated with a resin layer containing a glyceride compound and a resin with ester bonds, which suppresses deterioration in harsh environmental conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a resin material having an ester bond (such as polyester thermoplastic elastomer) is used in the tire, then the adhesion durability of the metal member with respect to the tire is improved, but the resin material deteriorates under high-temperature and high-moisture environment due to hydrolysis of the ester bond
Solution Approach 1:
A metal oxide layer is introduced as an intermediary between the metal member and the resin layer containing ester bonds. This oxide layer acts as a barrier that prevents moisture from reaching the ester bonds, thereby eliminating the hydrolysis pathway while preserving the adhesion benefits of the resin material.
Solution Approach 2:
The invention creates a composite structure consisting of three layers: metal member, metal oxide layer, and resin layer. This composite material approach combines the advantages of each component - the metal provides structural strength, the oxide layer provides moisture barrier functionality, and the resin layer provides adhesion durability.
2Strength
If the metal member is covered with a resin layer having an ester bond to improve adhesion, then the bond strength between metal and tire is enhanced, but the ester bonds undergo hydrolysis in high-humidity conditions leading to deterioration
Solution Approach 1:
The metal oxide layer serves as a protective intermediary that physically separates the moisture environment from the ester bonds in the resin layer. This intermediary layer allows the resin to maintain its bond-strengthening function while being protected from the harmful hydrolysis reaction.
Solution Approach 2:
The metal oxide layer, which forms naturally on the metal surface, is utilized as a beneficial protective barrier. Instead of viewing the metal surface as merely a substrate for resin adhesion, the invention leverages the oxide layer's inherent moisture-blocking properties to protect the resin from degradation.
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 resin-metal composite member effectively reduces deterioration of tire components under high-temperature and high-humidity conditions, enhancing the durability and performance of tires.
Implementation Method 1
a resin layer disposed around the metal member, the resin layer comprising a glyceride compound and a resin having an ester bond
Implementation Method 2
hydrolysis of an ester bond due to the moisture entering from the outside may become a cause of deterioration of the tire
Data Source
Figure 1A~1B
Figure 2
Figure 3
AI summary
A resin composition for a tire, comprising a glyceride compound and a resin having an ester bond.