Rubber seals have different rubber materials due to the different requirements of the environment and occasions. The materials of rubber oil seals include nitrile rubber, hydrogenated nitrile rubber, acrylic rubber, fluorine rubber, fluorosilicone rubber, and perfluoro rubber. And other seal materials.

1. Nitrile rubber

A very commonly used material in the production of seals, and oil-resistant seals mainly use nitrile rubber.

Nitrile rubber has excellent resistance to fuel oil and aromatic solvents, etc., which can meet common requirements and has a low cost.

2. Viton

1. Fluororubber (fluororubber) refers to a synthetic polymer elastomer containing fluorine atoms on the carbon atoms of the main chain or side chain.

Advantages of fluorine rubber

In the rubber seal material, its heat resistance (decomposition temperature greater than 400 degrees Celsius), oil resistance (various fuels, hydraulic oil, lubricating oil, synthetic oil), solvent resistance, weather resistance (external line resistance, ozone resistance, resistance to Radiation), the best resistance to chemical media, all surface nitrile rubber, polyurethane rubber can not be used in high temperature environments or special working fluids, fluorine rubber can be used as the material of the seal, not spontaneous combustion, non-combustibility, and fire It is self-extinguishing and has good physical and mechanical properties. It has the best comprehensive strength among all synthetic rubbers. It is commonly known as "Rubber King" and has become one of the indispensable and substitute basic materials in modern industry, especially in high-tech fields.

Disadvantages of fluorine rubber

The processing performance of its rubber seals is not easy to master, the price is higher, and the gorgeousness is 20 times that of nitrile rubber. The cold resistance and water resistance of rubber seals are poor, and the elasticity at room temperature is poor. The market has developed cold resistance and water resistance. High-performance fluororubber products, in addition to FFKM, which has better temperature resistance and chemical resistance than ordinary fluororubber, but the price is 10 times higher than fluororubber.

Application of fluorine rubber seals

Fluorine rubber is widely used in the fields of national defense, military industry, automobile and aviation, aerospace and petroleum. Fluorine rubber oil seals are also used in drilling machinery, oil refining equipment, natural gas desulfurization equipment, and can withstand high temperature and high pressure oil and strong corrosive media at the same time. In the chemical field, fluororubber oil seals are used on pumps, pipe joints, equipment containers, and are used to seal inorganic acids and other chemical substances; in the military industry, fluororubber is mainly used in aerospace, aviation and launch vehicles, The oil seals, tubing and electrical circuit sheaths of satellites, fighter jets, and new tanks are one of the key seal materials that cannot be replaced in the cutting-edge defense industry.

At present, the selection of seals is mainly based on the different use environments to determine the material and hardness of the seals.