Conductive rubber electrode: a core component for flexible bioelectric signal acquisition and neural regulation

1、 Product Overview

In cutting-edge fields such as wearable health monitoring, brain computer interfaces, and neurorehabilitation, electrodes are the "first gateway" for converting bioelectric signals (ECG, EEG, EMG) into recognizable data in the digital world. Although traditional metal electrodes have excellent conductivity, their rigid structure is difficult to achieve mechanical matching with soft human tissues, and long-term wear can easily cause discomfort such as skin redness, swelling, and pain.

The emergence of conductive rubber electrodes fundamentally changed this situation. Conductive rubber is a material that uniformly disperses conductive particles (such as silver plated glass, silver plated aluminum, silver, etc.) in an elastic matrix such as silicone rubber. Through pressure, the conductive particles come into contact with each other to form a conductive path, thus combining the flexibility, elasticity, and conductive function of rubber. Silicone rubber itself has excellent biocompatibility, and electrodes can be in long-term contact with the skin without adverse reactions.

Advanced Institute (Shenzhen) Technology Co., LtdWe have been deeply involved in the field of flexible electronic materials for many years, and have built a complete technical system from material formulation to large-scale production in the field of conductive rubber electrodes. Our products are widely used in wearable health monitoring, electrophysiological signal acquisition, transcutaneous electrical stimulation (TENS) therapy, brain computer interface and other scenarios.

2、 Core performance advantages

Soft and snug fit, comfortable to wear

The rubber surface of conductive rubber electrodes can form a smooth and uniform contact surface with the skin, closely adhering to the curves of the human body like a "second layer of skin". Maintain stable electrical properties and structural integrity even under complex deformations such as bending, stretching, and folding. Partial material systems can achieve a stretching rate of over 140%, and the stretching rate of linear electrodes can even reach 300%.

Dry electrode, farewell to gel troubles

Although the traditional gel electrode is the "gold standard" for biological signal acquisition, it faces the inherent problems of cumbersome skin preparation, drying out of gel, skin irritation, etc. As a dry electrode, conductive rubber electrode does not need conductive gel and adhesive, which greatly reduces skin preparation time, can be repeatedly cleaned and reused, and long-term use cost is significantly reduced.

Low impedance, high signal-to-noise ratio

Conductive rubber electrodes can exhibit sufficiently low electrical resistivity, fully meeting the requirements of bioelectric signal measurement. Silicone rubber can capture sweat (moisture) on the surface of the skin, helping to reduce the impedance of the skin electrode interface, thereby reducing motion artifacts and noise interference. After testing, the electrode showed no malfunction even after more than 50000 bending cycles, meeting the requirements for long-term wear and repeated use.

Biocompatibility guarantee

Silicone rubber material has been verified for biocompatibility and can be in long-term contact with human skin. Conductive rubber electrodes are safe and reliable for surface applications, supporting continuous monitoring of various body fluids such as sweat.

3、 Material system and customized solutions

Advanced Institute Technology has mastered the full chain material technology from conductive functional layers to flexible substrates, and can flexibly customize according to different application scenarios:

Conductive functional layer material library:Carbon nanotubes (CNTs), graphene, PEDOT: PSS conductive polymers, silver nanowires, MXene, etc. are suitable for differentiated needs such as electrochemical sensing, transparent conductivity, and ultra-high conductivity.

Flexible substrate material library:Polyimide (PI), polyester (PET/PEN), elastomers (PDMS, TPU), etc., each have their own emphasis on high temperature resistance, light transmittance, stretchability, and other dimensions.

Multiple electrode structure forms:Linear/fiber electrodes, thin film/sheet electrodes, three-dimensional elastomer multilayer structures, etc. are suitable for wearable energy storage, microdevices, and implantable sensing scenarios.

To learn more about our products and customized services, please visit our websiteProduct Center.

4、 Advanced preparation technology

Advanced Institute Technology has established mature large-scale production lines and mastered multiple core preparation processes:

• Screen printing:Low cost, high efficiency, suitable for large-scale production of silver paste and carbon paste.
• Vacuum Vapor Deposition (PVD):High quality metal thin films can be prepared to meet high-end sensing needs.
• Roll to roll hot pressing composite:Realize continuous production and significantly improve production capacity consistency.

The electromagnetic heating roller technology introduced by the company can achieve roll to roll continuous production, with temperature difference controlled within±1℃In key process steps such as hot pressing and shaping of carbon based thin films, and composite of metal nanomaterials and flexible substrates, the adhesion and structural stability of the product have been significantly improved.

5、 Typical application scenarios

Wearable health monitoring

Electrodes can be integrated into wearable devices such as smartwatches and smart patches to collect real-time electrophysiological signals such as electrocardiogram (ECG) and electromyography (EMG), and combined with sweat composition analysis, synchronously detect multimodal biochemical indicators such as glucose, lactate, and pH.

Transcutaneous electrical nerve stimulation (TENS)

Conductive rubber electrodes are used in low-frequency pulse therapy devices to apply electrical stimulation to the skin surface, achieving therapeutic purposes such as pain relief and muscle rehabilitation.

EEG and Brain Computer Interface

A EEG cap based on conductive rubber material, consisting of rubber electrodes, elastic brackets, and wireless modules, can be comfortably worn on the head for EEG signal acquisition.

Sports Physiology Analysis

Electrodes continuously collect high-quality physiological signals in dynamic environments such as movement, breathing, and muscle contraction, providing data support for athlete training and rehabilitation.

6、 Enterprise strength

Advanced Institute (Shenzhen) Technology Co., LtdEstablished in 2016, located in Bao'an District, Shenzhen, Guangdong Province, we are a national high-tech enterprise specializing in shielding materials, insulation materials, thermal conductive materials, and precious metal coatings. The company has independently registered trademarks“Research PlatinumOur main products include flexible electrode materials, conductive rubber, conductive silver paste, shielding materials, thermal conductive materials, etc.

The company has passed the following certifications:

• ISO 9001Quality Management System Certification
• GJB 773AAerospace related military standards
• RoHSEnvironmental certification

The R&D team has independent research and development capabilities in the fields of flexible substrate coating, conductive composite materials, and bioelectric signal electrodes, and can provide professional supporting services for cutting-edge fields such as wearable health monitoring, medical rehabilitation, and brain computer interfaces.

*The data in this article is sourced from the official technical documents and product information of Advanced Institute (Shenzhen) Technology Co., Ltd.