Aromatic Polyamide Insulating Shoe Insert with Cellular Core
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Solution Overview
Problem
Existing insulating shoe inserts are often bulky and uncomfortable, failing to provide effective thermal protection against excessive heat on various surfaces, especially in athletic shoes and cleats.
Innovation Solution
A thin, integrally formed or insertable insulating shoe insert comprising a honeycomb-like cellular core layer for cushioning and moisture resistance, paired with aromatic polyamide top and bottom layers for thermal insulation, bonded together with an adhesive to create a laminar structure that inhibits heat transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If traditional insulating materials are used to provide thermal protection, then heat resistance is improved, but the shoe insert becomes bulky and uncomfortable
Solution Approach 1:
The patent applies composite materials by combining aromatic polyamide layers (for heat resistance) with a honeycomb-like cellular core layer (for cushioning and structural support). This composite structure achieves effective thermal protection while maintaining a thin, comfortable profile that does not bulk up the shoe insert.
Solution Approach 2:
The patent uses thin aromatic polyamide layers as flexible thermal barrier films that provide heat resistance without significant thickness. These thin film structures effectively block heat transfer while maintaining flexibility and comfort, avoiding the bulkiness of traditional insulating materials.
2Temperature
If ventilation systems are added to cool the foot, then cooling effect is improved, but device complexity increases
Solution Approach 1:
The patent employs passive thermal insulation that automatically regulates heat transfer without requiring active cooling systems, motors, or complex controls. The aromatic polyamide and honeycomb structure self-regulate thermal flow based on temperature gradients, providing cooling protection through material properties alone rather than mechanical systems.
Solution Approach 2:
The patent extracts the active cooling components (motors, pumps, electronics) and replaces them with passive thermal barrier materials. This extraction simplifies the system by removing complex mechanical cooling systems while maintaining thermal protection through the inherent properties of the composite material structure.
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 combination of materials provides significant thermal protection, keeping feet cool and comfortable by reducing temperature transfer by over 20 degrees, preventing discomfort and blisters, and maintaining comfort on surfaces like artificial turf without bulkiness.
Implementation Method 1
a core layer to cushion and to resist moisture, comprising a honeycomb-like cellular material
Implementation Method 2
a top layer and a bottom layer positioned on opposing sides of the core layer, the top layer and bottom layer to resist the transfer of heat through the insulating shoe insert
Implementation Method 3
The top layer and bottom layer are bonded to the core layer by an adhesive
Data Source
AI summary
An insulating shoe insert including a core layer formed of a cellular material, and a top layer and a bottom layer bonded to opposing sides of the core layer, respectively, the top layer and the bottom layer being configured as thin sheets of aromatic polyamide material such that the top layer and bottom layer cooperate with the core layer to create a heat transfer resistance sufficient to resist transfer of heat through the core layer.