Why is silicone rubber increasingly favored for rail transit cables?
2025-12-25
Silicone rubber has gained growing popularity in rail transit cables primarily due to its comprehensive advantages in multiple key performance aspects, which perfectly meet the high requirements of modern rail transit for safety, reliability and environmental adaptability.
First and foremost, silicone rubber boasts excellent high and low temperature resistance. Whether in frigid regions or high-temperature operating environments, it maintains good flexibility and insulation, without being prone to hardening, cracking, softening or deformation, thus ensuring the long-term stable operation of cables.
Second, it features outstanding electrical insulation and corona resistance, making it ideal for rail transit systems with high voltage and strong electromagnetic interference. This helps enhance the stability of signal transmission and the safety of power systems.
In terms of fire safety, silicone rubber is a flame-retardant, low-smoke and halogen-free material. It does not release toxic or corrosive gases when burned and produces minimal smoke—this is particularly critical in crowded, enclosed spaces such as metro carriages and tunnels, fully complying with the stringent fire safety standards for rail transit.
Additionally, silicone rubber offers superior weather resistance, ozone resistance and anti-aging performance. It can withstand the impacts of complex environmental factors like ultraviolet rays, moisture and oil stains, extending the service life of cables. Meanwhile, its flexibility and mechanical toughness facilitate laying and installation, and effectively withstand continuous vibrations generated during train operation.
Last but not least, with the promotion of green and low-carbon concepts, silicone rubber aligns better with the sustainable development direction of rail transit thanks to its eco-friendly, non-toxic and recyclable properties.
In conclusion, relying on its remarkable performance in safety, reliability, durability and environmental friendliness, silicone rubber has naturally become one of the preferred materials for rail transit cables.
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