Shoe Sole Resin Composite Integrating Foam and Elastic Bodies
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Solution Overview
Problem
Conventional shoe sole members using foam products experience decreased cushioning properties and durability due to reduced shape restoring force when subjected to repeated high loads, especially in sports shoes.
Innovation Solution
A shoe sole member partially or entirely formed of a resin composite integrating a plurality of resin foam particles with non-foamed elastic bodies, where both the resin composition for the elastic bodies and the resin foam particles include a polyolefin-based or polyurethane-based resin as the main component.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If different kinds of resin foam products are combined together to adjust cushioning properties and shape restoring force, then the cushioning performance is improved, but the adhesive strength at the interface between different resins decreases
Solution Approach 1:
The patent applies homogeneity by using the same base resin material for both the foam particles and the elastic bodies. Specifically, both components are made from polyolefin-based or polyurethane-based resins, ensuring chemical compatibility and strong adhesion at the interface while maintaining different physical properties (foam vs. non-foamed) for optimized cushioning performance.
2Ease of operation
If high expansion ratio foam product is used to enhance cushioning properties and provide soft wearing feeling, then the initial stiffness is reduced and comfort is improved, but the shape restoring force decreases under repeated high load
Solution Approach 1:
The patent employs composite materials by combining foam particles with non-foamed elastic bodies of the same base resin. The foam particles provide low initial stiffness and soft wearing feeling, while the non-foamed elastic bodies contribute high shape restoring force. This composite structure resolves the contradiction between comfort and durability under repeated high load.
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 composite shoe sole member achieves high mechanical strength, effective cushioning properties, and suppressed excessive deformation under high loads, with improved durability and adhesive strength at the interfaces between the elastic bodies and resin foam particles.
Implementation Method 1
a resin composite in which a plurality of resin foam particles are integrated with one or more non-foamed elastic bodies
Data Source
AI summary
Provided is a shoe sole member partially or entirely formed of a resin composite in which a plurality of resin foam particles are integrated with one or more non-foamed elastic bodies, wherein a resin composition constituting the one or more elastic bodies and a resin composition constituting the plurality of resin foam particles both include a polyolefin-based resin as a main component, or both include a polyurethane-based resin as a main component. Also provided is a shoe including the shoe sole member.