Breathable Elastic Fabric Lamination via Segmented Adhesive Bonding
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Solution Overview
Problem
Multi-layer fabrics used in medical and sports applications often have poor air permeability, leading to moisture retention and potential bacterial growth, discomfort, and skin issues due to the lack of breathability and elasticity.
Innovation Solution
A flexible, breathable, and stretchable fabric laminate is created by bonding two knit fabric layers with elastomeric yarns, where the adhesive covers no more than 70% of the fabric, allowing for air permeability and moisture evaporation, and featuring a hydrophilic layer to aid in moisture evaporation and a hydrophobic layer for skin comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If adhesive is used to laminate multiple fabric layers, then the layers are bonded together, but air permeability deteriorates
Solution Approach 1:
The adhesive is applied in discrete segments or islands rather than as a continuous layer, creating isolated bonding zones that allow air to pass through the spaces between adhesive applications, thus maintaining breathability while achieving sufficient bond strength
Solution Approach 2:
Different regions of the laminate have different adhesive coverage - areas requiring strength have adhesive while areas requiring breathability have no adhesive, creating a spatially varying quality that optimizes both bonding and air permeability
2Adaptability or versatility
If fabric layers are laminated to add comfort and stretch, then elasticity is improved, but breathability deteriorates
Solution Approach 1:
The laminate structure uses segmented adhesive bonding rather than continuous bonding, creating pathways for air and moisture to pass through the multi-layer construction while maintaining the elastic properties of the fabric layers
Solution Approach 2:
The invention combines multiple fabric layers with different properties (elastic layers, breathable layers, comfort layers) into a composite laminate structure that achieves overall elasticity while preserving breathability through the layered architecture and selective adhesive placement
3Object-affected harmful factors
If moisture is retained in the fabric, then comfort deteriorates, but bacteria resistance worsens
Solution Approach 1:
The laminate structure extracts moisture from the skin interface through breathable pathways and hydrophilic layers that transport moisture away from the skin, preventing the wet environment that promotes bacterial growth
Solution Approach 2:
The hydrophilic layers in the laminate capture and transport moisture that would otherwise remain at the skin surface, converting the potential harm of moisture retention into a benefit by directing moisture through controlled pathways to evaporation zones
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 laminate provides enhanced breathability, comfort, and bacteria resistance, with improved air permeability and durability, suitable for direct skin contact applications while maintaining elasticity and hook-engageability.
Implementation Method 1
the first and second fabric layers are bonded together by an adhesive at their technical faces
Implementation Method 2
the ground yarns of both the first knit fabric and the second knit fabric include elastomeric yarns
Implementation Method 3
an inexpensive tricot fabric is laminated on the other side... moisture movement... sweat and heat to move quickly away from the skin
Data Source
AI summary
A flexible, breathable, stretchable fabric laminate is formed from two knit pile fabrics, one having exposed hook-engageable fiber loops and the other providing a skin contact surface. The grounds of both knits include elastomeric yarns, and the fabrics are bonded together at their technical faces, with adhesive in contact with both pile yarns and elastomeric ground yarns of each knit fabric but covering only portions of the laminate to leave other portions air-permeable.