【TAY YAH RUBBER】EMI Shielding Conductive Rubber

In industrial context, "superconducting" rubber does not refer to a state of zero resistance in physics, but rather to a special composite material that achieves extremely low resistivity by incorporating highly conductive fillers into an elastomer (such as silicone).

Conduction Principle: The fillers form a three-dimensional conductive pathway (i.e., a conductive network) within the rubber, or allow electrons to conduct across the polymer barrier through the quantum tunneling effect.

Resistivity Range: The volume resistivity of carbon black-filled systems is typically between 1 and 10³ Ω⋅cm, while metal-filled systems can achieve even lower values.

1. Material Composition
Superconducting rubber is mainly composed of two parts: an "elastomer matrix" and "conductive fillers":
Matrix Material:
Silicone (VMQ): The most commonly used, with a wide temperature range (-60°C to 200°C+) and excellent weather resistance.

Key Conductive Fillers:
Superconducting Carbon Black: Possesses a large surface area and dendritic structure, requiring only a small amount to form a conductive network.

Metallic Fillers: Such as silver-plated aluminum, silver-plated copper, nickel-graphite, etc., commonly used for high-specification electromagnetic interference (EMI) shielding.

Nanomaterials: Such as carbon nanotubes (CNTs) or graphene, providing stable conductivity while maintaining the rubber's softness and color.

2. Core Material Advantages

Environmental Toughness: Retains the original high and low temperature resistance, ozone resistance, and UV resistance of silicone rubber.

Electromagnetic Shielding: Effectively attenuates electromagnetic waves and prevents signal interference.

Flexible Design: Can be processed and shaped using various methods such as extrusion, molding, or FIPG dispensing.

3. Common Application Areas

Electronics & Communications: EMI shielding gaskets for 5G base stations and mobile devices, conductive buttons.

Aerospace & Defense: Sealing of avionics equipment, radar compartment protection, satellite communication sealing.

Automotive Industry: Battery Management System (BMS) connectors for electric vehicles (EVs), sensor protection.

Medical Devices: Shielding of Magnetic Resonance Imaging (MRI) equipment, wearable electrode sensors.