Abstract: Sealing strips have a wide range of applications in life, and are commonly used in cars, doors and windows. It is also made of many materials, such as rubber, silicone, EPDM, etc. What is the difference between EPDM sealing strips and silicone sealing strips? Which sealing strip is better, EPDM or silicone? Silicone sealing strips have good elasticity and good low temperature resistance; but their ozone resistance is average and their strength is low. EPDM sealing strips have good ozone resistance and high strength; they have high hardness, but poor low-temperature brittleness resistance. 1. The difference between EPDM sealing strips and silicone sealing strips
EPDM sealing strips are polymers of ethylene, propylene and a small amount of third monomer non-conjugated dihydrocarbons. Thing, international naming: EthyienePropyeneDieneMethyiene referred to as EPDM. Mainly, it has corrosion resistance, weather resistance, aging resistance, exposure resistance, and ultraviolet resistance. It is especially waterproof, has good electrical insulation and elasticity, and other physical and mechanical properties. These advantages are irreplaceable by other materials.
Silicone rubber sealing strip is composed of alternating silicon and oxygen atoms. It mainly has heat resistance, low temperature resistance, ozone resistance, weather resistance and physiological stability. It has unparalleled insulation properties and excellent hydrophobicity. sex and proper breathability. Good silicone rubber door and window seals can be used for a long time, and their service life is more than three times that of ordinary rubber seals. They have good elasticity and resistance to compression deformation, and have excellent aging resistance. They are very durable rubber products.
2. Which sealing strip is better, EPDM or silicone?
Which one is better, silicone sealing strip or EPDM sealing strip? It mainly depends on the use, temperature and medium. Silicone sealing strips are mainly aimed at sealing at high temperatures without chemical media; EPDM sealing strips are mainly aimed at sealing ketones below 100 degrees, and silicone sealing strips are often more expensive than EPDM sealing strips.
Silicone sealing strips have excellent heat resistance, cold resistance, sealing, ozone resistance and aging resistance, and can maintain their original strength and elasticity at -40°C to +250°C. Due to these excellent properties, silicone rubber sealing strips not only play an important role in modern medicine, but are also widely used in the construction industry.
EPDM sealing strips not only have excellent chemical resistance, weather resistance, sealing function, anti-aging, ozone resistance, chemical resistance and other properties, but also have outstanding electrical insulation and elasticity. and other physical and mechanical functions. The operating temperature range is -60 to 150℃. Due to these excellent properties, EPDM sealing strips are widely used in machinery, automobiles, building doors and windows, curtain walls, rivers, dams, ports, docks, underground tunnels, water conservancy and electricity, ships, airports, railways, bridges, etc. Various fields.
In short, silicone sealing strips and EPDM sealing strips each have their own advantages and disadvantages. The advantages of silicone sealing strips are: good elasticity and good low temperature resistance; disadvantages: average ozone resistance and low strength! Advantages of EPDM sealing strip: good ozone resistance, high strength; high hardness, disadvantage: poor low temperature resistance and brittleness. Choose according to your own needs.