Brief introduction of various rubber mat materials

1. NBR

Nitrile rubber generally has very good resistance to fuel oil and aromatic solvents, but it is not resistant to media such as ketones, esters, and hydrogen chloride. Therefore, oil-resistant sealing products and Nitrile rubber are mainly used.

2. Neoprene

Neoprene generally also has good oil and solvent resistance. It has very good resistance to gear and transformer oils, but not to aromatic oils. Neoprene also has some excellent weathering and ozone aging properties. The cross-linking fracture temperature of neoprene is above 200°C, and neoprene is usually used to make door and window seals. Neoprene also has very good corrosion resistance to inorganic acids. In addition, because neoprene also has good flexibility and airtightness, it can be made into diaphragms and sealing products for vacuum.

3. Natural rubber

Compared with most synthetic rubbers, natural rubber has good comprehensive mechanical properties, cold resistance, high resilience and wear resistance. Natural rubber is not resistant to mineral oils, but is relatively stable in vegetable oils and alcohols. In the hydraulic brake system of the brake fluid composed of n-butanol and refined castor oil, the rubber bowl and rubber ring used as the seal are made of natural rubber, and the general sealant is also commonly used to make natural rubber.

4. Viton

Viton has outstanding heat resistance (200-250 ℃), oil resistance, and can be used to manufacture cylinder liner seals, rubber bowls and rotary lip seals, which can significantly increase its service life.

5. Silicone rubber

Silicone rubber has outstanding high and low temperature resistance, ozone resistance and weather aging resistance. It can maintain its unique use flexibility, ozone resistance and weather resistance in the working temperature range of -70 ~ 260 ° C. It is suitable for making thermal mechanisms. Required sealing gaskets, such as strong light source lampshade sealing gaskets, valve gaskets, etc. Because silicone rubber is not oil-resistant, has low mechanical strength and is expensive, it is not suitable for making oil-resistant sealing products.

6. EPDM rubber

The main chain of EPDM rubber is a fully saturated linear structure without double bonds, and its side chains generally have dienes, so that it can be vulcanized with sulfur. EPDM rubber has excellent aging resistance, ozone resistance, weather resistance, heat resistance (can be used for a long time in an environment of 120 ° C), chemical resistance (such as alcohol, acid, strong alkali, oxidant), but not Resistant to aliphatic and aromatic solvents. EPDM rubber has low density in rubber and has high filling characteristics, but lacks self-adhesiveness and mutual adhesion. In addition, EPDM rubber has outstanding steam resistance, and can be used to make sealing products such as steam-resistant diaphragms. EPDM rubber has been widely used in washing machines, accessories in TV sets and door and window sealing products, or in the production of rubber strips with various composite profiles.