Breathable Knitted Sock with Zonal Ventilation Density
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Solution Overview
Problem
Existing breathable socks face challenges in optimizing moisture wicking and ventilation efficiency, often leading to fragility, reduced comfort, and ineffective air circulation, particularly at the toe and arch areas.
Innovation Solution
A breathable knitted sock design featuring transverse ventilation zones at the base of the toes, a ventilation window under the soles, and a permeable instep zone, created by patterns of reduced knitting density, which enhances air exchange without compromising mechanical strength or comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If transverse ventilation channels are created across the sole of the sock, then air circulation and ventilation are improved, but the sock becomes fragile and comfort is reduced
Solution Approach 1:
The ventilation system is segmented into multiple functional zones rather than continuous transverse channels. Longitudinal ventilation strips are positioned at specific locations (toes, instep, arch) rather than spanning the entire sole, breaking the continuity that causes fragility while maintaining ventilation effectiveness in critical areas.
Solution Approach 2:
Ventilation is applied locally at specific zones where it is most needed (toes, instep, arch) rather than uniformly across the entire sole. This localized approach maintains mechanical strength in high-stress areas while providing adequate ventilation in perspiration zones.
2Quantity of substance
If hydrophobic yarns are used to evacuate moisture, then moisture wicking is improved, but the ratio optimization becomes difficult and efficiency is reduced
Solution Approach 1:
Different zones of the sock are assigned different functional properties: hydrophilic yarns are used in areas requiring moisture absorption (toes, instep), while hydrophobic yarns are used in areas requiring moisture evacuation (arch, heel). This zonal differentiation eliminates the need to optimize a single fiber ratio across the entire sock.
Solution Approach 2:
The sock is divided into distinct functional zones with different yarn compositions. This segmentation allows each zone to be optimized for its specific function rather than requiring a uniform fiber ratio throughout, simplifying the overall design and manufacturing process.
3Temperature
If loose knitting density is used for breathability, then ventilation is improved, but the sock becomes too thin and comfort is reduced
Solution Approach 1:
The sock features zones of reduced knitting density (for breathability) combined with zones of normal or increased density (for comfort and support). This local differentiation allows the sock to be breathable where needed while maintaining adequate thickness and comfort in critical areas like the instep and heel.
Solution Approach 2:
The sock combines different knitting densities within a single garment, creating a composite structure where loose knitting provides ventilation and tighter knitting provides support. This composite approach allows simultaneous achievement of breathability and comfort without compromising either function.
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 effective ventilation and moisture management without weakening the sock, maintaining comfort and mechanical resistance, and preventing moisture re-entry by creating a chimney effect and air circulation that evacuates warm, moist air from the shoe gap.
Implementation Method 1
comprises a transverse ventilation zone at the base of the toes on the top and on the underside of the sock, these zones being formed by patterns of reduced knitting density... a ventilation window on the underside of the soles of the feet at the level of the arch of the foot, this window being formed by several longitudinal strips of reduced knitting density
Implementation Method 2
A breathable sock... comprising areas of increased permeability to promote the passage of air... intended to eliminate or prevent sweating of the feet by aeration or breathing of the feet through the sock
Data Source
Figure 1
Figure 2A~3
AI summary
The knitted sock, comprising a main body (3) with a toe (1) and heel (2), has aeration zones (4, 5, 6, 7) below and above the toes, on top of the foot, and beneath the sole. The first three zones are transverse, narrow lens- or lozenge-shaped, and made from stitches of reduced density. The zone beneath the sole is made from a series of lengthwise strips (71), also with reduced density, alternating with normal strips (72) to form a rectangular shape. The aeration zone on top of the foot can also have stitches of reduced density alternating with stitches of normal density.