Conductive TPE Textile Electrodes for Gel-Free Biopotential Sensing
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Solution Overview
Problem
Conventional wet gel electrodes for biopotential signal sensing and electrical stimulation can cause skin irritation, are uncomfortable, and degrade over time, limiting their effectiveness and usability in continuous health monitoring applications.
Innovation Solution
Development of textile-based electrodes using conductive thermoplastic elastomers integrated into articles of clothing, which convert ionic current at the skin-electrode interface to electrical signals without the need for gel, utilizing a conductive layer and active electrode board for improved signal quality and comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If wet gel electrodes are used to reduce impedance at the skin-electrode interface, then signal sensing quality is improved, but skin irritation and discomfort occur
Solution Approach 1:
The patent removes the wet gel component from the electrode system entirely, replacing it with a dry textile-based electrode made of conductive thermoplastic elastomer. This extraction eliminates the source of skin irritation while maintaining electrical conductivity through the conductive TPE material and conductive yarns, thereby resolving the contradiction between signal quality and skin comfort.
Solution Approach 2:
The patent changes the physical and chemical parameters of the electrode material from wet gel to dry conductive thermoplastic elastomer. This parameter change includes transitioning from a liquid/gel state to a solid elastomeric state, and from conventional conductive materials to conductive TPE with integrated conductive yarns. The result is an electrode that provides sufficient electrical conductivity for biopotential signal sensing without causing skin irritation associated with wet gel.
2Power
If wet gel electrodes are used to improve electrical stimulation capability, then energy delivery is enhanced, but degradation over time and discomfort occur
Solution Approach 1:
The patent extracts the wet gel component that causes degradation and discomfort, replacing it with a durable thermoplastic elastomer structure. The conductive TPE material maintains energy delivery capability for electrical stimulation while providing long-term durability and reusability, eliminating the time-related degradation issues associated with wet gel electrodes.
Solution Approach 2:
The patent employs composite materials consisting of thermoplastic elastomer combined with conductive yarns and conductive fillers. This composite structure provides both the electrical conductivity necessary for energy delivery and the mechanical durability of the elastomeric matrix. The combination of materials achieves enhanced power delivery capability while simultaneously improving duration of use through resistance to degradation.
3Measurement precision
If conventional electrodes are used for continuous health monitoring, then signal sensing is achieved, but comfort and ease of use are reduced
Solution Approach 1:
The patent changes the physical parameters of the electrode to match skin properties, using thermoplastic elastomer that is soft, flexible, and breathable. This parameter change includes adjusting the material's mechanical properties to be compliant with skin movement and its thermal properties to be skin-friendly. The conductive TPE electrode maintains biopotential signal sensing capability while dramatically improving user comfort for continuous wear.
Solution Approach 2:
The patent employs a flexible textile-based electrode structure made of thin conductive TPE material that can conform to body contours and move with the skin. This flexible design eliminates the rigidity and discomfort of conventional electrodes while maintaining electrical contact for continuous health monitoring. The thin-film elastomeric structure allows for prolonged wear without compromising comfort or signal quality.
4Ease of operation
If textile-based electrodes with conductive thermoplastic elastomer are used, then comfort and durability are improved, but manufacturing complexity increases
Solution Approach 1:
The patent merges multiple functions into a single integrated material: the thermoplastic elastomer serves as both the structural matrix and the conductive pathway when combined with conductive yarns and fillers. This merging eliminates the need for separate gel application steps, separate conductive layer deposition, and separate textile integration processes. The unified conductive TPE material simplifies manufacturing while maintaining the comfort and durability benefits of the textile-based design.
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 textile-based electrodes provide a comfortable, durable, and breathable solution for continuous health monitoring, maintaining signal quality and reducing skin irritation, while being easy to use and washable, with the ability to be worn on various body parts.
Implementation Method 1
the contact layer is formed from a conductive thermoplastic elastomer and is configured to convert an ionic current at a skin-electrode interface to electrical signals
Implementation Method 2
the laminate material and the base layer are bounded using heat activated glue
Implementation Method 3
the active electrode board and the base layer are mechanically fused together using ultrasonic welding
Data Source
AI summary
An apparatus and method of manufacturing same is provided. The apparatus includes: a base layer integrated with an article; a conductive layer in communication with a base contact pad mounted on the base layer; an active electrode board in electrical communication with the base contact pad, the active electrode board configured to receive or send electrical signals from the base contact pad; and a contact layer in electrical communication with the conductive layer, and the conductive layer is mounted on the base layer; wherein the active electrode board comprises a board contact pad configured to receive or send electrical signals from the base contact pad.