Flexible Conductive Fabric Circuit Layers for Washable Smart Wear
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Solution Overview
Problem
Existing conductive textiles for smart wear face challenges in forming circuits freely without restrictions, maintaining electrical conductivity, and preventing circuit disconnection, while also ensuring dynamic wearability and washability without compromising the intrinsic physical properties of clothing.
Innovation Solution
A conductive fabric comprising a base layer, a conductive layer with a pre-designed electric pattern, and an insulating layer, where the conductive layer is formed using materials like silver and conductive polymers with a binder, and the insulating layer is created using resins like polyurethane and PTFE, ensuring flexibility and protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If insulated electric wires are attached to clothing to provide conductivity, then electrical conduction is achieved, but production cost increases and circuit disconnection occurs during wearing
Solution Approach 1:
The patent merges the conductive function directly into the fabric structure by integrating conductive fibers during the weaving process, eliminating the need for separate wire attachment steps. This combination resolves the contradiction by achieving both cost reduction (through integrated manufacturing) and reliability improvement (through permanent integration that prevents disconnection during wearing).
Solution Approach 2:
The conductive fibers are prepared and positioned within the fabric structure before the final garment assembly. This preliminary integration ensures that the conductive pathways are established during fabric manufacturing rather than added later, preventing disconnection issues and reducing overall production costs by eliminating subsequent attachment processes.
2Adaptability or versatility
If conductive fibers are woven into textiles to achieve conductivity, then electrical conduction is provided, but the number and size of metallic yarns are limited which restricts circuit design freedom
Solution Approach 1:
The patent applies local quality by using conductive fibers selectively in specific regions or patterns within the fabric, rather than uniformly throughout. This allows circuit design freedom to be enhanced (by placing conductivity only where needed) while maintaining reliability (by ensuring adequate conductive material density in those specific locations).
Solution Approach 2:
The patent employs composite materials by combining conductive fibers with non-conductive textile fibers in a woven structure. This composite approach enables flexible circuit design patterns while maintaining electrical conductivity through the strategic arrangement of conductive elements within the composite fabric structure.
3Adaptability or versatility
If electronic printing technology is applied to form conductive circuits on fabric, then circuit design flexibility is improved, but the fabric loses dynamic wearability and intrinsic textile properties
Solution Approach 1:
The patent uses thin conductive fiber layers integrated into the fabric structure rather than rigid printed circuits. This thin-film approach maintains the fabric's flexibility and dynamic wearability while providing circuit design flexibility, resolving the contradiction between design freedom and textile property preservation.
Solution Approach 2:
The patent changes the physical parameters of the conductive elements by using flexible conductive fibers with appropriate diameter, conductivity, and mechanical properties. This allows the fabric to maintain its intrinsic textile properties (softness, flexibility, breathability) while achieving circuit design flexibility through the controlled arrangement of these parameter-optimized conductive fibers.
4Reliability
If metallic yarns are used to provide conductivity in textiles, then electrical conduction is achieved, but the textiles become heavy and rigid
Solution Approach 1:
The patent replaces heavy, durable metallic yarns with lighter conductive fibers that achieve the necessary conductivity for the application. While metallic yarns provide long-term durability, the conductive fibers used here are optimized for weight reduction while maintaining sufficient conductivity for smart wear applications, resolving the weight-conductivity contradiction.
Solution Approach 2:
The patent uses composite materials by combining light-weight conductive fibers with textile fibers, achieving electrical conductivity without the heavy weight of pure metallic yarns. This composite structure maintains flexibility and reduces weight while providing the necessary conductive pathways for smart wear functionality.
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 fabric allows for flexible circuit design, maintains electrical conductivity, prevents disconnection, and remains washable with high wash resistance, while retaining the inherent properties of the textile, ensuring stable electricity flow and durability.
Implementation Method 1
a conductive layer formed on the base layer to be capable of being freely formed by a pre-designed electric pattern
Implementation Method 2
an insulating layer formed on the conductive layer to protect the conductive layer from damage
Data Source
AI summary
A conductive fabric is provided. The conductive fabric comprises a base layer composed of a synthetic, regenerated or natural fiber, a conductive layer formed on the base layer to be capable of being freely formed by a pre-designed electric pattern, and an insulating layer formed on the conductive layer to protect the conductive layer from damage.