Water-Resistant Fiber Coating With Sweat-Absorbing Inner Layer
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Solution Overview
Problem
Existing moisture-vapor-permeable and water-resistant fabrics lack moisture absorption and quick-drying properties, leading to discomfort and requiring additional liners to prevent stickiness, which increases costs.
Innovation Solution
A structural modification incorporating a moisture absorption layer composed of hydrophilic fiber or inorganic powder blended with binding resin, dot-coated on the inner side of the moisture-vapor-permeable and water-resistant layer, allowing for effective sweat absorption and vapor expulsion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fully-coated water-resistant layer is applied onto the base fabric, then water resistance is improved, but the fabric structure becomes flat and non-three-dimensional
Solution Approach 1:
The water-resistant layer is segmented into discrete water-resistant particles rather than a continuous coating, allowing the base fabric to maintain its three-dimensional structure while achieving water resistance through the distributed particles
Solution Approach 2:
Water resistance is applied locally through discrete particles distributed on the fabric surface rather than a uniform continuous coating, preserving the fabric's overall three-dimensional structure while providing targeted water resistance where particles are present
2Reliability
If a water-resistant layer is coated onto the base fabric, then rain penetration is prevented, but moisture absorption and quick-drying properties deteriorate
Solution Approach 1:
The water-resistant layer is formed using particles with nano-microporous structures that allow moisture vapor to pass through while blocking liquid water, enabling both water resistance and moisture absorption/quick-drying properties to coexist
Solution Approach 2:
The invention uses composite water-resistant particles combining hydrophobic materials (for water resistance) with hydrophilic materials (for moisture absorption), creating a dual-function layer that prevents rain penetration while maintaining quick-drying capability
3Reliability
If a water-resistant resin layer is formed, then water resistance is achieved, but stickiness to skin and self-stickiness increases
Solution Approach 1:
The invention replaces the continuous resin coating with discrete water-resistant particles that do not exhibit sticky properties, eliminating the need for additional anti-stick treatments while maintaining water resistance
Solution Approach 2:
The porous particle structure provides water resistance through physical blockage and surface tension effects rather than through sticky resin adhesion, eliminating stickiness while maintaining the water-resistant function
4Ease of operation
If a liner layer is added to prevent stickiness, then comfort is improved, but manufacturing cost increases
Solution Approach 1:
The water-resistant particles serve multiple functions simultaneously: providing water resistance, preventing stickiness, and maintaining breathability, thereby eliminating the need for separate liner layers and reducing overall fabric complexity and cost
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 modified fabric ensures comfort by preventing rain penetration while expelling sweat vapor, eliminating stickiness, and reducing the need for liners, thus lowering costs and enhancing wearability.
Implementation Method 1
The fiber powder or inorganic powder is highly hydrophilic and absorbent in its high moisture absorption ability
Implementation Method 2
The highly hydrophilic and high-moisture-absorption fiber powder and/or inorganic powder added in the binding resin are capable of absorbing large amount of sweat
Implementation Method 3
which prohibits the penetration of raindrops from outside and permits the permeability of moisture vapor from inside of fabric
Implementation Method 4
the moisture-vapor-permeable and water-resistant layer can prevent the penetration of raindrops from entering the fabric while it can expel the moisture vapor produced from body sweat through the fabric into the air
Data Source
AI summary
A moisture-vapor-permeable and water-resistant fiber involves a layer of base fabric, a moisture-vapor-permeable layer, and a water absorption layer. The moisture vapor permeable layer is obtained by coating or laminating the inner side of the fabric with a moisture-vapor-permeable resin, which prohibits the penetration of the water droplets but allows the penetration of the moisture vapor molecules. The moisture absorption layer with intricate and colorful design is composed of binding resin blended with fiber powder and/or inorganic powder, and which is dot-coated or dot-printed onto the inner side of the moisture-vapor-permeable and water-resistant layer. The fiber powder or inorganic powder is highly hydrophilic and highly absorbent in its moisture absorption ability, which, when the clothes are fabricated, can prevent the penetration of raindrops but allows the transmission of the evaporated vapor of sweat through the fabric. Moreover, it is capable of absorbing plentiful amount of sweat.