What are the materials of the seals?

Seals have a wide range of uses, and are used in various mechanical equipment that require sealing. Seals are generally made of rubber, so they are also called rubber seals. Commonly used rubber materials include natural rubber, nitrile rubber, fluorine rubber, There are many kinds of polyurethane rubber, EPDM rubber, silicone rubber, etc. The properties of these rubber materials are different, and you can choose according to your needs. When producing seals, it is necessary to select the appropriate rubber material first, and then complete the production through preheating, molding and other processes. Commonly used processes include calendering, molding, and injection. Let's take a look at the material of the seal. 

1. What are the materials of the seals?

Seals are materials or parts used to prevent internal fluid or solid leakage or external dust and moisture from invading the machine, because rubber has high elasticity at room temperature, slightly plastic, and has very good mechanical strength, so most rubber seals Material. The common materials for making seals are as follows:

1. Natural rubber

Compared with synthetic rubber, natural rubber has good comprehensive mechanical properties, cold resistance, high resilience and wear resistance, and is more suitable as a seal in hydraulic braking systems.

2. Nitrile rubber

Nitrile rubber has excellent resistance to fuel oil and aromatic solvents, so oil-resistant seals are usually made of nitrile rubber.

3. Fluorine rubber

Viton has outstanding heat resistance and oil resistance, and can be used to manufacture cylinder liner seals, rubber bowls and rotary lip seals.

4. Polyurethane rubber

Polyurethane rubber has excellent abrasion resistance and good air-tightness, and is suitable for the manufacture of various rubber sealing products, such as oil seals, O-rings and diaphragms.

5. EPDM rubber

EPDM rubber has excellent aging resistance, ozone resistance, weather resistance, heat resistance, chemical resistance, and steam resistance. It can be used to make sealing products such as steam-resistant diaphragms, and is more used in washing machines and televisions. accessories and door and window sealing products.

6. Silicone rubber

Silicone rubber is resistant to high and low temperature, ozone, and weather aging, and is suitable for making gaskets required in thermal mechanisms, such as gaskets for strong light source lampshades, valve gaskets, etc.

7. Neoprene

Neoprene has good oil resistance and solvent resistance, also has excellent weather aging and ozone aging resistance, good flexibility and air tightness, and is often used to make door and window sealing strips, diaphragms and sealing products for vacuum.

8. Acrylic rubber

Acrylic rubber is resistant to heat oil, especially oil resistance and stability at high temperatures. It is suitable for making oil seals resistant to high temperature oil in non-cold regions, but it is not suitable for sealing products subject to tensile or compressive stress at high temperatures.

9. Chlorine ether rubber

Chlorine ether rubber has the advantages of nitrile rubber, neoprene rubber and acrylic rubber, and has good process performance. Under the condition that the operating temperature is not too low, it is suitable for the manufacture of oil seals, various sealing rings, gaskets, diaphragms and Good material for sealing products such as dust cover.\