Phenyl raw rubber, as a core base material, endows the seals of NBC protective filter elements in special vehicles with excellent high and low temperature resistance, superior radiation resistance, and excellent chemical stability, thus fundamentally ensuring the sealing reliability of the filter element under extreme conditions.

Reliable Sealing at Extreme Temperatures
NBC protection systems require the filter element to form an absolute seal inside and outside the vehicle, preventing any contaminated air from seeping into the passenger compartment. Special vehicles may face extreme climates ranging from polar cold to desert heat.

Low Temperature Resistance: The introduction of phenyl disrupts the regularity of the siloxane molecular chains, significantly lowering the glass transition temperature of the material. By adjusting the phenyl content, especially in formulations with low phenyl content (5-10%), the seals can maintain excellent flexibility and elasticity at temperatures as low as -70°C or even lower, avoiding seal failure due to low-temperature hardening and brittleness.

High Temperature Resistance: Phenyl silicone rubber can also operate stably under conditions such as engine compartments or the instantaneous high temperatures of a nuclear explosion. Its long-term operating temperature range is -70℃ to 250℃, and it can withstand short-term temperatures above 300℃, ensuring stable sealing performance under drastic temperature changes.

A Key Barrier Against Nuclear Radiation
In a nuclear war environment, filter element seals must withstand high-intensity nuclear radiation (such as gamma rays and neutron flux); otherwise, material aging and failure will lead to lethal radioactive material leakage.

The radiation resistance of phenyl silicone rubber is one of its core advantages. Studies have shown that silicone rubber with high phenyl content exhibits excellent radiation resistance. Its molecular structure effectively resists bombardment by high-energy particles, maintaining good mechanical properties, cross-linking degree, and resilience even under high-dose radiation environments. Unlike ordinary rubber, it does not rapidly become brittle and crack, thus ensuring the continued effective operation of the NBC (nuclear, biological, and chemical) protection system after a nuclear explosion.

Excellent Chemical Inertness and Weather Resistance
NBC protection filters need to filter and adsorb various toxic chemicals and bioaerosols; therefore, the seals themselves must possess extremely high chemical stability.

Seals made from phenyl raw rubber exhibit excellent ozone resistance, weather resistance, and chemical inertness. They resist corrosion from various chemicals, are not easily reactive with toxic agents, and ensure stable performance during long-term storage and in complex chemical environments, preventing leaks due to corrosion or aging.

In summary, phenyl raw rubber, with its elasticity retention over a wide temperature range, superior resistance to nuclear radiation, and excellent chemical stability, is an ideal material for manufacturing sealing components for nuclear, biological, and chemical protective filters in special vehicles, and is one of the key technologies for ensuring the safety of occupants.