Multi-Layer Vamp Construction for Waterproof Breathable Footwear

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Solution Overview

Problem

Existing waterproof and breathable footwear technologies face challenges in achieving durability, flexibility, and comfort due to issues with waterproof sealing, poor fitting, and compromised flexibility from multiple layers, leading to leakage and reduced breathability.

Innovation Solution

A vamp construction method involving multiple layers of vamp material, fabric, and elastic material, with specific cross-sectional widths to balance hardness and tensile strength, secured together using various methods like bonding, laminating, or stitching, to create a flexible and waterproof footwear design.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If waterproof upper material is used, then water resistance is improved, but breathability deteriorates

Engineering Contradiction:

Improvewater resistanceVSAvoidbreathability

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The upper is divided into multiple functional layers: an outer waterproof layer, an inner breathable liner, and a connecting region with integrated sealing. This segmentation allows each layer to perform its specific function - the outer layer provides water resistance while the inner liner maintains breathability, resolving the contradiction between these two requirements.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent employs composite construction combining different materials with complementary properties. The outer waterproof material is paired with an inner breathable liner material, creating a composite upper structure that simultaneously achieves both water resistance and breathability by leveraging the strengths of each material.

Inventive Principle:

Principle #40Composite materials

2Reliability

If multiple layers are added for waterproofing, then water resistance is improved, but flexibility deteriorates

Engineering Contradiction:

Improvewater resistanceVSAvoidflexibility

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The patent utilizes thin, flexible membrane materials for the waterproof layer and elastic materials for the connecting region. These thin-film structures provide effective waterproofing while maintaining flexibility, allowing the shoe to bend and move naturally without the rigidity that would result from thicker, more rigid waterproofing layers.

Inventive Principle:

Principle #30Flexible shells and thin films

Solution Approach 2:

The patent optimizes the thickness and material properties of each layer to achieve the right balance. By controlling parameters such as layer thickness, material composition, and elastic properties, the design maintains flexibility despite the multi-layer construction, ensuring the shoe remains comfortable and adaptable to foot movement.

Inventive Principle:

Principle #35Parameter changes

3Reliability

If liner material is inserted into sized shoe upper, then waterproofing is improved, but fit quality deteriorates

Engineering Contradiction:

ImprovewaterproofingVSAvoidfit quality

Core Design Contradiction:

ReliabilityVSManufacturing precision

Solution Approach 1:

The connecting region is pre-formed and integrated into the upper structure before the liner is inserted. This preliminary preparation ensures proper alignment and accommodation for the liner, allowing the liner to be smoothly integrated without compromising the fit quality or creating wrinkles and pulls.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The liner is nested within the connecting region that is itself integrated into the upper structure. This nested arrangement allows the liner to be properly accommodated within the pre-formed connecting region, ensuring a smooth fit that maintains both waterproofing integrity and aesthetic appearance without wrinkles or pulling.

Inventive Principle:

Principle #7Nested doll (Nesting)

4Reliability

If waterproof seal is created at connecting region, then water resistance is improved, but manufacturing complexity increases

Engineering Contradiction:

Improvewater resistanceVSAvoidmanufacturing complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The sealing function is merged with the connecting region structure itself rather than being a separate added component. The connecting region is designed with integrated sealing features that are formed as part of the upper construction process, eliminating the need for separate sealing steps and reducing manufacturing complexity while maintaining effective water resistance.

Inventive Principle:

Principle #5Merging (Combining)

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 method results in a vamp construction that provides comfort, support, and protection while maintaining flexibility and preventing water ingress, ensuring the foot remains cool and dry without sacrificing durability or breathability.

Implementation Method 1

providing an elastic material, securing the vamp material to the fabric, and securing the elastic material to the fabric

Methodology Applied

Scientific EffectElasticity: Elasticity

Data Source

PatentUS20250009073A1Vamp construction and method of constructing the same

Publication Date: 2025.01.09 COLUMBIA INSURANCE CO

AI summary

Disclosed are a vamp construction and a method of vamp construction utilizing multiple layers in a multi-part vamp. This construction provides increased flexibility and comfort, more efficient material utilization, and aesthetic appeal. More specifically, the vamp includes a layer of vamp material, a layer of fabric, and a layer of elastic material.