Dual-Layer Textile Protective Piece for Sweat Management
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Solution Overview
Problem
Existing protective pieces integrated into clothing, such as underwear, fail to effectively absorb perspiration and reduce sweat odors while also preventing the appearance of halos on the external clothing side, often leading to unpleasant humidity sensations and odor emanation.
Innovation Solution
A protective piece comprising two superimposed textile structures: a first absorbent textile structure with mainly hydrophilic threads for odor reduction and a second hydrophobic textile structure forming a moisture barrier, which is permeable to air and water vapor, ensuring effective sweat absorption and odor neutralization without excessive moisture retention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If hydrophobic fibers are used in the inner textile layer to reduce sweat absorption, then the feeling of dampness is reduced, but sweat odors increase and sweat absorption decreases
Solution Approach 1:
The patent applies different fiber properties to different layers: the inner layer uses hydrophobic fibers to minimize dampness sensation against the skin, while the outer layer uses hydrophilic fibers to absorb and neutralize sweat odors. This local differentiation of material properties resolves the contradiction between comfort and odor control.
Solution Approach 2:
The protective piece is constructed as a composite textile structure with an inner layer of hydrophobic fibers and an outer layer of hydrophilic fibers. This composite structure allows each layer to perform its specific function optimally, combining the dampness-reducing property of hydrophobic materials with the odor-neutralizing property of hydrophilic materials.
2Object-generated harmful factors
If hydrophilic fibers are used in the inner textile layer to increase sweat absorption, then sweat odors are reduced, but the feeling of dampness increases and sweat absorption becomes excessive
Solution Approach 1:
The patent assigns hydrophilic fibers specifically to the outer layer where odor neutralization is needed, while keeping the inner layer in contact with the skin free of excessive absorption materials. This localized placement ensures odor control without creating a damp sensation against the skin.
Solution Approach 2:
The dual-layer composite structure with inner hydrophobic and outer hydrophilic layers allows the system to absorb and neutralize odors through the outer layer while the inner layer maintains skin comfort by preventing excessive moisture accumulation.
3Object-generated harmful factors
If a waterproof outer layer is added to prevent halo appearance, then the appearance of halos is reduced, but breathability decreases and sweat absorption is blocked
Solution Approach 1:
The outer layer uses hydrophilic fibers that are selectively absorbent to sweat and odor molecules while maintaining breathability for air and water vapor. This localized functional differentiation allows the outer layer to control appearance without completely blocking breathability.
Solution Approach 2:
The patent optimizes the absorbency parameters of the outer hydrophilic layer to achieve the right balance: sufficient absorption to prevent halo appearance on the external surface, but not so much as to completely block breathability and sweat evaporation.
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 solution effectively absorbs perspiration, reduces sweat odors, and limits the appearance of halos on the external clothing side, providing a dry sensation for the wearer while maintaining breathability and air permeability.
Implementation Method 1
the inner face of the 3D knit, which may be in contact with the skin, is for example made of fibers or filaments capable of ensuring moisture transfer by capillary action
Implementation Method 2
an outer textile layer, for example a knit, a fabric or a non-woven, which has superior absorption properties to the inner textile layer so as to absorb perspiration and which can dry quickly in order to avoid saturation of this layer by perspiration; this outer textile layer is made of hydrophilic fibers
Data Source
Figure 1
Figure 2
AI summary
The protective piece (2) is intended to be integrated into a garment (1) and is capable of absorbing perspiration, reducing sweat odors, and limiting the appearance of stains. Said protective piece (2) is permeable to air and at least to water vapor and comprises two superimposed textile structures: - a first absorbent textile structure (20) comprising at least one first absorbent knit or fabric (200), the inner face (200a) of which constitutes the inner face (2a) of the protective piece intended to be in contact with the skin, and which comprises on its inner face (200a) predominantly hydrophilic yarns (2001) capable of absorbing moisture and reducing sweat odors, said first absorbent textile structure having an odor reduction rate, measured by the ISO 17299-3 method for the determination of acetic acid by gas chromatography, which is greater than 50%,and -a second textile structure (21) forming a moisture barrier and comprising at least a second hydrophobic knit or fabric (210) in contact with said first absorbent textile structure (20), said second textile structure (21) being air-permeable and breathable with a water vapor resistance (Ret) in steady state, measured according to standard NF EN ISO 11092:2014, of less than 6 m².Pa/W, said protective piece being devoid of an additional layer having a water vapor resistance (Ret) in steady state, measured according to standard NF EN ISO 11092:2014, greater than 6 m².Pa/W.,