What are the advantages of silicone rubber compared to other materials?

Silicone rubber seals have significant advantages over seals made of other materials in terms of temperature resistance, weather resistance, electrical insulation, physiological inertness, breathability and gas selectivity, and environmental friendliness. The specific analysis is as follows:

1. Excellent temperature resistance: Silicone rubber can maintain stable performance in extreme temperature environments. Its operating temperature range can reach -60°C to +250°C (for some special formulations, it can reach +300°C), far exceeding that of ordinary rubber materials. This characteristic makes it an ideal sealing choice for high-temperature environments (such as car engine compartments, industrial ovens) and low-temperature environments (such as refrigeration equipment, low-temperature laboratories).

2. Outstanding weather resistance: The Si-O bonds in the molecular structure of silicone rubber have high bond energy and have strong resistance to the erosion of ultraviolet rays, ozone, and oxides. Long-term outdoor use is unlikely to cause aging, fading, or cracking, and its service life can reach over 20 years, significantly superior to other sealing materials.

3. Excellent electrical insulation performance: Silicone rubber has high resistivity and low dielectric constant, and can withstand high voltage without breakdown or leakage. It is widely used in electrical equipment, electronic components, and high-voltage cables.

4. Good physiological inertness: Silicone rubber is non-toxic and odorless, meeting safety standards for food and medical industries. It can be used for sealing in medical devices (such as infusion sets, ventilators) and food packaging (such as bottle caps), ensuring safe use.

5. High permeability and gas selectivity: The molecular structure of silicone rubber makes it have good permeability and selectivity to gases. At room temperature, its permeability to air, nitrogen, oxygen, etc. is 30-50 times higher than that of natural rubber, suitable for applications requiring gas exchange (such as respirators, gas sensors).

6. Environmental friendliness and sustainability: After burning, silicone rubber mainly produces carbon dioxide, water, and silica residue, without pollution and meeting environmental standards, belonging to an environmentally friendly material.

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