Resin-Metal Composite Adhesion Layer for Tire Durability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing tire technologies face challenges in achieving improved adhesion durability between metal members and tire frames, which affects the overall durability and performance of tires.
Innovation Solution
A resin-metal composite member is configured with a metal member, an adhesion layer containing a polyester-based thermoplastic elastomer with polar functional groups, and a covering resin layer, including additives such as amorphous resins or fillers, to enhance adhesion and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a metal member is covered with a resin material to improve adhesion to the tire frame, then adhesion is improved, but adhesion durability is insufficient
Solution Approach 1:
The patent divides the coating into two distinct functional layers: an adhesion layer (5-50 μm thick) containing polyester-based thermoplastic elastomer with polar functional groups for bonding to the metal member, and a covering resin layer (50-500 μm thick) providing mechanical protection. This segmentation allows each layer to optimize its specific function, with the adhesion layer ensuring strong bonding and the covering layer providing durability against environmental factors and mechanical stress.
Solution Approach 2:
The patent employs composite material structures in both layers. The adhesion layer uses a composite of polyester-based thermoplastic elastomer with polar functional groups (such as carboxyl, hydroxyl, or amino groups) combined with reinforcing fillers. The covering resin layer uses a composite of thermoplastic resin and thermoplastic elastomer, creating a material system that combines the adhesion properties of polar groups with the mechanical durability of the composite structure.
2Strength
If the adhesion layer contains only polyester-based thermoplastic elastomer, then adhesion is achieved, but adhesion durability is insufficient
Solution Approach 1:
The patent modifies the chemical parameters of the polyester-based thermoplastic elastomer by introducing polar functional groups (carboxyl, hydroxyl, or amino groups) at specific content ratios (0.1-10 mmol/kg). This parameter change enhances the chemical reactivity and bonding capability with the metal member surface. Additionally, the patent optimizes the thickness parameter of the adhesion layer (5-50 μm) to ensure sufficient bonding area while maintaining flexibility.
3Ease of manufacture
If a simple coating structure is used, then manufacturing is simple, but interface breakage and sliding occur
Solution Approach 1:
The patent segments the coating into two distinct layers applied in sequence: first the adhesion layer containing polyester-based thermoplastic elastomer with polar functional groups is applied and cured, then the covering resin layer is applied over it. This segmented approach, while adding a step, ensures that each layer performs its specific function optimally, preventing interface breakage and sliding through the specialized adhesion layer while the covering layer provides additional protection.
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 significantly improves adhesion durability, reducing breakage and sliding at the interface, thereby enhancing the tire's stress resistance and durability.
Implementation Method 1
an adhesion layer, and a covering resin layer in this order, wherein the adhesion layer includes a polyester-based thermoplastic elastomer having a polar functional group
Data Source
Figure 1A~1B
Figure 2
Figure 3
AI summary
A resin-metal composite member for a tire includes a metal member (27), an adhesion layer (25), and a covering resin layer (28) in this order. The adhesion layer (25) includes a polyester-based thermoplastic elastomer having a polar functional group, and at least one additive selected from the group consisting of an amorphous resin including an ester bond, a polyester-based thermoplastic resin, and a filler, and the content ratio of the polyester-based thermoplastic elastomer having a polar functional group is 50% by mass or more with respect to the entire adhesion layer (25).