Rubber gaskets The sheet-shaped rubber products that seal between the two static surfaces of the metal flange or other connecting parts are collectively referred to as rubber gaskets. It can be made by molding method, or can be punched with vulcanized film. It can be widely used in all kinds of mechanical equipment, playing the role of gasket, sealing, cushioning and so on.

Oil resistance is a very important characteristic of rubber materials. In many cases, rubber gaskets need to be used in various oily media environments. Oil resistance is a very important parameter of rubber gaskets, but the oil resistance of various rubber materials The skills are also different, which will be described in detail below

Fuel resistance:

Fluorine rubber and fluorosilicone rubber have the best resistance to fuel oil. However, neoprene rubber and chlorinated polyethylene rubber have the worst fuel resistance.

The fuel resistance of nitrile rubber increases with the increase of acrylonitrile content. The fuel resistance of chlorohydrin rubber is better than that of nitrile rubber.

Resistance to mixed fuel oil: Fluorosilicone rubber and fluorine rubber have the best resistance to mixed fuel oil. Acrylic rubber has the worst resistance to mixed fuels.

The mixed fuel resistance of nitrile rubber increases with the increase of acrylonitrile content.

Fluorine rubber with high fluorine content has better stability to mixed fuel.

Resistance to acid and oxidizing fuel:

For acid oxidized fuel, the hydroperoxide in acid oxidized fuel can deteriorate the performance of vulcanized rubber, so the nitrile rubber and chlorohydrin rubber commonly used in fuel systems cannot meet the requirements of long-term use.

Only fluoroelastomers such as fluoroelastomers, fluorosilicone rubber, fluorinated phosphazene and hydrogenated nitrile rubber have better performance.

Ordinary nitrile rubber compound cannot work for a long time in acid gasoline at 125 degrees. Only the low-sulfur-sulfur donor activated by cadmium oxide and the nitrile nitrile rubber with white carbon black as the main raw materials can better resist sour gasoline. Increasing the content of acrylonitrile can reduce the permeability of sour gasoline.