Nonpneumatic Tire Resin Framework Temperature Dependence

The patent applies parameter changes by carefully controlling the bending modulus of elasticity of the synthetic resin material within a specific range: 200-1000 MPa at -30°C and 100-500 MPa at 60°C. This parameter optimization resolves the contradiction by ensuring the material is sufficiently stiff for durability while maintaining enough flexibility for ride comfort across the temperature range. The patent further refines this by specifying the ratio of bending moduli at different temperatures should be 0.4-2.0, creating a balanced material property profile.

The patent employs composite materials by combining synthetic resin with specific additives and fillers to achieve the desired mechanical properties. The resin composition includes polypropylene or polyethylene as base materials, combined with reinforcing fillers and plasticizers in controlled amounts. This composite approach allows simultaneous achievement of high durability and acceptable ride comfort by distributing mechanical stresses and maintaining flexibility.

The patent directly addresses temperature dependence by establishing specific bending modulus ranges at two extreme temperatures (-30°C and 60°C) and controlling their ratio. The bending modulus at -30°C should be 200-1000 MPa, at 60°C should be 100-500 MPa, and their ratio should be 0.4-2.0. This parameter control ensures the material maintains appropriate stiffness across temperatures, minimizing ride comfort variation while preserving structural strength.

The patent applies dynamics by designing the material properties to adapt to temperature changes. The synthetic resin composition is formulated to exhibit dynamic mechanical behavior that responds appropriately to temperature variations, maintaining optimal performance characteristics across the operating temperature range through its viscoelastic properties.

The patent resolves this contradiction by optimizing the bending modulus parameter within a controlled range rather than maximizing rigidity. The specified range (200-1000 MPa at -30°C) provides sufficient form stability for manufacturing precision while avoiding excessive rigidity that would harm ride comfort. The material maintains adequate flexibility to absorb vibrations and provide comfort.

The patent applies local quality by differentiating material properties for different components. The ring member and connecting members use synthetic resin with optimized mechanical properties, while other components may use different materials or resin formulations tailored to their specific functional requirements, allowing each part to optimize both manufacturing and performance characteristics.