Nanofiber Sock Heel Design for Foot Stability and Skin Protection
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Solution Overview
Problem
Conventional soccer socks with gripping elements often cause skin irritations and fail to provide sufficient slip resistance, especially during high-pressure sports movements, leading to excessive foot slippage and blisters.
Innovation Solution
A soccer sock design featuring synthetic fibers with diameters less than 1 µm, predominantly in the heel and toe areas, covering more than 30% to 80% of the surface, providing enhanced slip resistance and distributed friction to stabilize the foot without causing irritation, and adaptable for use in both socks and sports shoes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional gripping elements are applied to socks, then slip resistance is improved, but skin irritations and blisters occur
Solution Approach 1:
The invention changes the fundamental parameter of fiber diameter to ultra-fine scale (less than 1 μm, specifically around 0.07 μm for Nanofront® fibers). This parameter change transforms the interaction mechanism between sock and skin/shoe, providing slip resistance through massive surface area contact rather than through discrete gripping elements that concentrate pressure and cause irritation.
Solution Approach 2:
The ultra-fine synthetic fibers create a porous, high-surface-area structure that increases friction distributed across many contact points. This porous network of nanofibers allows the sock to grip the shoe interior and foot simultaneously without creating concentrated pressure points, thereby preventing blisters while maintaining slip resistance.
2Strength
If conventional gripping elements are applied to socks, then slip resistance is improved, but the sock fails to provide sufficient slip resistance during high pressure loads
Solution Approach 1:
By changing the fiber diameter parameter to ultra-fine scale, the sock maintains its gripping capability under high pressure loads. The nanofiber structure compresses uniformly under pressure, maintaining large surface area contact and consistent friction force, unlike conventional gripping elements that may deform or concentrate stress.
Solution Approach 2:
The invention uses composite construction combining ultra-fine synthetic fibers (providing slip resistance) with potentially other fiber types in different sock regions. This composite approach allows optimization of slip resistance specifically in high-pressure areas like the heel while maintaining comfort and flexibility in other regions.
3Strength
If nanofibers are used throughout the entire sock, then slip resistance is maximized, but flexibility and movement in certain areas is reduced
Solution Approach 1:
The invention applies ultra-fine nanofibers selectively to specific regions of the sock where slip resistance is most needed, particularly the heel area which experiences high pressure and shear forces. Other regions of the sock can use different fiber compositions optimized for flexibility, breathability, or comfort, allowing the foot to move naturally in those areas.
Solution Approach 2:
The sock is segmented into different functional zones: high-slip-resistance zones (heel, toe) using ultra-fine nanofibers, and flexibility zones using different fiber constructions. This segmentation allows each part of the foot to receive the appropriate level of grip and freedom of movement required for its specific function during athletic activity.
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 sock design significantly reduces the risk of blisters and enhances foot stability during extreme movements, maintaining comfort and control by evenly distributing slip resistance, while the fibers' nanoscale diameter ensures a high surface area for improved friction, especially in wet conditions.
Implementation Method 1
the synthetic fibers which may be woven into the material provide a much higher surface compared to conventional fibers which leads to the increased slip resistance
Data Source
AI summary
Sock (200), in particular a soccer sock, comprising: (a.) at least one first portion (210a; 210b; 210c) comprising a synthetic fiber having a diameter of less than 1 µm, (b.) wherein one of the at least one first portions (210a; 210b; 210c) is arranged at least partly in the heel part of the sock (200), and (c.) wherein the at least one first portion (210a; 210b; 210c) comprises more than 30%, preferably more than 50% and more preferably more than 80% of the surface of the sock (200) encompassing the foot.