Phenyl silicone rubber elastic paste has recently achieved breakthrough progress in the fields of high-end electronic encapsulation and precision equipment cushioning protection. This specialty material, which never cures and permanently maintains its viscoelasticity, is becoming an indispensable “flexible armor” for precision components in 5G communications, new energy vehicles, and aerospace, providing a revolutionary solution for the long-term reliability of equipment under complex operating conditions thanks to its exceptional stress dissipation, environmental sealing, and wide-temperature-range stability.

Research confirms that within the extreme temperature range of -100°C to 250°C, the material's storage modulus (G') and loss modulus (G'') remain highly stable, with the tan δ value consistently maintained in the ideal damping range of 0.8-1.2. This property enables it to effectively absorb broad-spectrum vibration energy, reducing the vibration acceleration transmissibility of critical components by over 60%. Simultaneously, its extremely low compression set (≤5%, 100°C×22h) ensures long-term filling reliability.

In 5G millimeter-wave base station AAUs (Active Antenna Units), phenyl silicone rubber elastic paste is used to fill microscopic gaps between high-density chips and heat sinks. It not only achieves efficient thermal conduction (thermal conductivity up to 1.2 W/(m·K)) but also effectively buffers thermal stress generated by drastic temperature fluctuations through its viscoelasticity, extending chip solder joint fatigue life by more than three times. In the new energy vehicle sector, the material is directly potted around power modules in motor controllers, successfully addressing the “breathing effect” challenge of chips under high power density and significantly enhancing module reliability under combined vibration and damp-heat stress.

Notably, the material also demonstrates irreplaceable value in the passive vibration isolation of aerospace precision inertial navigation systems and optical platforms. Its unique rheological properties allow it to fully fill complex irregular spaces without imposing additional stress on micro-force-sensitive components (such as MEMS gyroscopes), ensuring measurement accuracy and survivability of equipment during the extreme mechanical environments of launch phases. Industry experts point out that with the continuous increase in equipment integration and power density, the protective philosophy of phenyl silicone rubber elastic paste— “overcoming rigidity with flexibility”—is evolving from a supplementary material to one of the key core materials determining the performance and lifespan of high-end equipment.