Waterproof Breathable Insole with Ventilation Gaps
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Solution Overview
Problem
Waterproof shoes with existing designs suffer from poor breathing effects due to the use of waterproof glue on the insole, which compromises ventilation, while using breathable glue eliminates the waterproof characteristic.
Innovation Solution
A waterproof and breathable insole design featuring a shoe lining with inwardly curved bottom side edges, an insole with projections for ventilation gaps, and a pad with a waterproof and breathable material bonded using non-waterproof breathable glue, allowing for both waterproofing and breathability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a layer of waterproof glue is used on the insole to provide waterproof effect, then waterproofing is improved, but breathing effect deteriorates
Solution Approach 1:
The insole is designed with different regions having different properties: the central region uses waterproof glue for waterproofing, while the peripheral regions (front and rear edges) are left without glue to allow breathability. This local differentiation resolves the contradiction by applying waterproofing only where necessary while maintaining breathability in other areas.
Solution Approach 2:
The insole is segmented into multiple functional zones: a waterproof central region and breathable peripheral regions. The shoe lining is also segmented with curved bottom side edges that create ventilation channels. This segmentation allows simultaneous achievement of waterproofing and breathability in different parts of the shoe.
2Object-generated harmful factors
If a flexible layer of breathable glue is used for the insole, then breathing effect is improved, but waterproof characteristic deteriorates
Solution Approach 1:
Different regions of the insole use different materials: breathable glue or no glue in peripheral areas for breathability, and waterproof glue in the central area for waterproofing. This local quality differentiation allows the shoe to have both breathable and waterproof characteristics simultaneously.
3Reliability
If the bottom wall of the insole is coated with waterproof glue, then waterproof effect is improved, but ventilation deteriorates
Solution Approach 1:
The insole is divided into waterproof and non-waterproof segments. The bottom wall has waterproof glue only in specific central areas, while peripheral areas remain uncovered, creating ventilation channels. The shoe lining's curved bottom side edges further enhance ventilation by creating gaps at the periphery.
Solution Approach 2:
Waterproof glue is applied locally only to the bottom wall of the insole's central region, not to the entire surface. This localized application maintains waterproofing where needed while preserving ventilation channels at the edges where the glue is not applied.
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 design achieves a balance between waterproofing and breathability by creating ventilation gaps and using a breathable adhesive, extending the shoe's service life and maintaining comfort.
Implementation Method 1
a pad (30), which has a layer of waterproof and breathable material and is bonded to the whole area of the outside wall of the insole (20)
Implementation Method 2
bonded to the whole area of the outside wall of the insole and a part of the shoe lining with a layer of glue
Data Source
AI summary
A waterproof and breathable insole includes a shoe lining with two bottom side edges respectively curved inwards, an insole, which is peripherally stitched to the border area of the shoe lining and has two projections longitudinally arranged at two sides respectively attached to the bottom side of the bottom side edges of the shoe lining and defining with the bottom side edges of the shoe lining a plurality of gaps for ventilation, and a pad, which has a layer of waterproof and breathable material and is bonded to the whole area of the outside wall of the insole and a part of the shoe lining with a layer of non-waterproof and breathable glue.