Modern technological products are increasingly characterized by multi-material integration: rigid circuit boards contacting flexible skin, glass screens bonded to metal frames, and ceramic sensors embedded in fabric substrates. These heterogeneous systems exhibit significant disparities in physical properties—mismatched coefficients of thermal expansion (CTE), vast differences in hardness, and incompatible surface energies. Direct contact between such dissimilar materials often leads to stress concentration, delamination, or functional failure. In this context, the interface between materials becomes the critical zone determining overall reliability. Silicone rubber, owing to its unique physicochemical characteristics, is frequently employed as the buffer and intermediary layer at these junctions.

Its low elastic modulus allows for large deformations under load without transmitting high stress, effectively mitigating mechanical incompatibility between rigid and flexible structures. Its surface inertness means it neither strongly adheres to nor completely repels most substrates; instead, through the use of primers or plasma treatment, it enables controllable bonding. Furthermore, its thermal stability ensures interface integrity is maintained despite temperature fluctuations. Crucially, silicone rubber can also serve as a functional carrier—providing electrical conductivity, thermal conductivity, dielectric insulation, or sealing—transmitting physical actions without introducing additional interfering variables.

In wearable devices, it isolates electronic modules from the skin, preventing friction damage and sweat corrosion.

In building curtain walls, it fills gaps between glass and aluminum frames, accommodating wind loads and thermal expansion/contraction.

In automotive electronics, it encapsulates wire harness connectors, preventing loosening from vibration and moisture ingress.

These applications do not highlight silicone rubber’s standalone performance but leverage its capacity as a “transition medium” to establish a state of physical compatibility between substances that would otherwise struggle to coexist.

This role is fundamentally structural: silicone rubber does not dominate system functionality but ensures stable operation in complex environments. Its value lies not in foreground performance but in background maintenance. When two worlds need to touch yet cannot collide directly, silicone rubber offers a flexible solution—not by eliminating differences, but by bridging them with a passable path.



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