Electromagnetic shielding rubber is a material made by evenly distributing conductive particles in a rubber matrix. It is mainly used to solve the problems of electromagnetic interference (EMI) and radio frequency interference (RFI) of electronic devices. The following is an introduction to its applications in the electronics field:

Application Areas
Communication Equipment Field: In highly conductive parts such as antennas, connectors, and plugs, electromagnetic shielding rubber can provide stable electromagnetic shielding, prevent mutual interference between devices, and ensure the stable transmission of communication signals.
Information Technology Equipment Field: It is widely used in devices such as computers, monitors, and keyboards. For example, in parts like the touch panel of the keyboard and the backplane of the display screen, it can effectively shield external electromagnetic interference and ensure the normal operation of the devices.
Medical Device Field: It is used in various components such as sensors, wires, and connectors, providing stable electromagnetic shielding, reducing the risk of device malfunctions, and ensuring the accuracy and safety of medical devices.
Industrial Electronic Equipment Field: It plays a role in components such as circuit boards, cable connectors, and sensors, preventing the interference of complex electromagnetic signals in the industrial environment on the devices and ensuring the stable operation of industrial electronic equipment.

Principle of Action
Electromagnetic Field Cancellation: The conductive particles filled in the electromagnetic shielding rubber come into contact with each other within a certain volume fraction, forming a continuous electronic state. When the external electromagnetic field reaches the outside of the rubber, the strong electromagnetic wave causes the free electrons of the conductive particles to move, creating an electromagnetic field opposite to the external electromagnetic field. The internal and external electromagnetic fields cancel each other out, thus weakening the electromagnetic interference wave.
Energy Conversion: When the electromagnetic wave hits the free electrons, during the movement of the free electrons, due to the certain resistance of the conductive particles, heat is generated. That is, the electromagnetic interference wave is converted into the kinetic energy of the free electron movement and then into heat energy, thereby weakening the electromagnetic interference wave.

Advantages
Good Flexibility: It can adapt to electronic devices of various shapes and sizes, can be bent and stretched, and can be conveniently applied to components with different external structures. It can also play a buffering role when the device is impacted by external forces, protecting the electronic components.
Excellent Sealing Performance: It can not only shield electromagnetic signals but also effectively prevent water vapor, dust, etc. from entering the interior of electronic devices, preventing device malfunctions caused by moisture, dust accumulation, etc.
Good Processability: It is easy to process and form, and can be made into products of different shapes and specifications through various processes such as compression molding and extrusion, such as gaskets, seals, and liners, to meet the shielding and sealing requirements of different parts of electronic devices.

Development Trends
High Performance: With the development of electronic devices towards high frequency, high speed, and high integration, the requirements for the shielding efficiency, electrical conductivity, heat resistance, weather resistance, and other properties of electromagnetic shielding rubber are constantly increasing. Developing high-performance electromagnetic shielding rubber materials is an important trend.
Thinning and Lightening: To meet the requirements of thinning and lightening of electronic devices, electromagnetic shielding rubber will develop towards being thinner and lighter, while maintaining good shielding and mechanical properties.