Resin-Metal Composite Member Adhesion Layer
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Solution Overview
Problem
Existing tire technologies face challenges in achieving enhanced adhesion durability and moist-heat resistance, particularly when metal members in tires are exposed to hot, humid environments, leading to potential rust and degradation.
Innovation Solution
A resin-metal composite member is designed with a polyester-based thermoplastic elastomer adhesion layer and a covering resin layer, where the adhesion layer contains polar functional groups, optimizing the hard segment to soft segment ratio to enhance adhesion and moisture barrier properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If metal members are covered with a resin material to improve adhesion to the tire frame, then adhesion durability is improved, but moist-heat resistance deteriorates due to rust and degradation in hot, humid environments
Solution Approach 1:
The invention uses a composite coating structure consisting of a resin material layer and a metallic material layer. The resin material (preferably polyester-based thermoplastic elastomer) provides adhesion to the tire frame, while the metallic material layer (containing aluminum powder or aluminum flake) acts as a barrier against moisture and rust, thereby simultaneously improving adhesion durability and moist-heat resistance
Solution Approach 2:
The invention changes the chemical composition parameters of the coating by incorporating specific metallic materials (aluminum powder or aluminum flake) with controlled content ratios (5-50 mass%). This parameter adjustment creates a dual-function coating that maintains adhesion while providing moisture barrier properties to resist rust in hot, humid environments
2Strength
If the resin material is designed to improve adhesion through chemical reactivity, then adhesion strength is enhanced, but moisture penetration increases leading to corrosion
Solution Approach 1:
The coating combines resin material with metallic material to create a composite structure where the resin provides chemical reactivity for strong adhesion to the tire frame, while the metallic material layer serves as a physical barrier that blocks moisture penetration and prevents corrosion of the metal member
Solution Approach 2:
The coating structure assigns different local functions to different layers: the resin material layer contacts the tire frame and provides adhesion through chemical reactivity, while the metallic material layer contacts the external environment and provides moisture barrier protection, thereby achieving both strong adhesion and moisture resistance
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 configuration provides excellent adhesion durability and moist-heat resistance by improving chemical reactivity and uneven electric charge distribution, reducing moisture penetration and corrosion, while maintaining high compatibility for melt-bonding.
Implementation Method 1
the adhesion layer contains polar functional groups, optimizing the hard segment to soft segment ratio to enhance adhesion and moisture barrier properties
Implementation Method 2
improving the durability of adhesion between the metal member provided in the tire and the tire frame
Implementation Method 3
the adhesion layer contains polar functional groups, optimizing the hard segment to soft segment ratio to enhance adhesion and moisture barrier properties
Implementation Method 4
maintaining high compatibility for melt-bonding
Data Source
Figure 1A~1B
Figure 2
Figure 3
AI summary
A resin-metal composite member for a tire, the member including a metal member (27), an adhesion layer (25), and a covering resin layer (28) in this order, in which the adhesion layer (25) includes a polyester-based thermoplastic elastomer having a polar functional group, and the ratio [HS/(HS + SS)] of hard segments (HS) with respect to the total of hard segments (HS) and soft segments (SS), in the polyester-based thermoplastic elastomer having a polar functional group, is from 83% by mol to 98% by mol.