Electronic sealants, as substitutes for sealing rings, are widely used in the field of electronic devices. Their core advantage lies in addressing the adaptability challenges of traditional sealing rings in precision and miniaturized scenarios, thanks to benefits such as “compatibility with complex structures, lightweight design, and seamless sealing”.
Examples include sensors, connectors, radio frequency (RF) modules, etc. These components are small in size and have irregular structures, making it difficult for sealing rings to fit into the installation space. Electronic sealants can form a thin-layer seal through dispensing and coating, while also providing insulation properties.
- Medical Electronics: Ultrasonic probes, monitors.
- Aerospace Electronics: Navigation modules, radar components.
These devices need to withstand harsh environments such as high and low temperatures and vibrations. Sealants can prevent sealing rings from falling off due to vibration and leaking due to aging.
This category covers ECUs (Electronic Control Units), on-board sensors, and battery packs. Sealants can achieve integrated “waterproofing + dustproofing + anti-aging” performance, and are more compatible with the complex assembly structures of automotive electronics (such as special-shaped interfaces and narrow cavities) compared to sealing rings.
For waterproof sealing of mobile phones, TWS (True Wireless Stereo) earbuds, and smart watches (e.g., interfaces, cavity gaps), sealants can be coated into ultra-thin layers (ranging from several micrometers to dozens of micrometers). They do not occupy internal space, solving the problem of sealing rings being “bulky and affecting assembly”.
They can adhere to irregular surfaces and special-shaped structures, eliminating the need for precise size matching like sealing rings. This reduces the difficulty of processing and assembly.
- Lightweight: Their density is much lower than that of rubber sealing rings, making them especially suitable for weight-sensitive electronic devices (e.g., drones, wearable devices).
- Integration: They can integrate the functions of “sealing + bonding + insulation”, reducing the number of components.
High-quality electronic sealants (such as silicone and polyurethane types) can withstand high and low temperatures (-50℃ to 150℃), damp heat, and chemical media (e.g., oil stains). Their aging rate is much slower than that of rubber sealing rings.
There are no splicing gaps, which can completely eliminate the problem of “leakage at the sealing ring interface”. They are particularly suitable for scenarios with high sealing requirements, such as high pressure and vacuum environments.
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