XNBR and XNBR sealing solutions

XNBR (carboxylic nitrile rubber) is a synthetic rubber commonly used in sealing solutions. XNBR sealing solutions offer several advantages due to the unique properties of XNBR rubber.

Excellent oil resistance: XNBR rubber has excellent resistance to oil, fuel and lubricants. This makes it ideal for sealing applications in the automotive, industrial and mechanical industries where there is frequent contact with oil and fuel.
High Temperature Stability: XNBR exhibits better heat resistance compared to standard nitrile butadiene rubber (NBR). It can withstand higher temperatures without significant loss of sealing performance, making it suitable for applications in high temperature environments.
Good Chemical Resistance: XNBR rubber has good resistance to a wide range of chemicals, acids and alkalis, expanding its range of applications in industries that require exposure to chemicals.
Resistance to compression set: XNBR sealing solutions have good resistance to compression set, which means they retain their original shape and sealing properties even after prolonged compression. This ensures a long-term sealing effect.
Mechanical strength and durability: XNBR rubber has good mechanical strength, tear resistance and durability. These properties enable XNBR sealing solutions to withstand harsh operating conditions, including high pressures and dynamic movements.
Customizable solutions: XNBR rubber can be formulated and designed to meet specific application requirements. Manufacturers can adjust the composition and formulation of XNBR to optimize properties such as hardness, flexibility and chemical resistance for the intended sealing application.

XNBR sealing solutions are used across a variety of industries including automotive, oil and gas, aerospace, industrial equipment and more. Some common XNBR sealing products include O-rings, gaskets, seals, diaphragms, and custom molded rubber parts. The specific choice of XNBR sealing solution depends on factors such as sealing environment, media compatibility, temperature range and performance requirements.

What is XNBR?

XNBR is the abbreviation of a polymer material, the full name is “Carboxylated Nitrile Butadiene Rubber”, and the Chinese name is carboxylated nitrile rubber. It is a synthetic rubber with specific chemical composition and performance characteristics.

XNBR is obtained by introducing carboxyl functional groups into the molecular structure of nitrile butadiene rubber (NBR). This carboxylation treatment makes XNBR have better thermal stability, oil resistance and mechanical properties than traditional NBR.

The following are some features and application considerations of XNBR

Oil resistance: XNBR has excellent oil resistance and can maintain stable performance when exposed to liquids such as petroleum, fuel and lubricants. Therefore, it is commonly used in applications requiring oil-resistant seals and rubber products in automobiles, machinery, and industrial equipment.
Heat resistance: Compared with traditional NBR, XNBR has higher thermal stability and can maintain its physical and mechanical properties at higher temperatures. This makes the application of XNBR in high temperature environments more feasible.
Mechanical properties: XNBR has good elasticity, tensile strength and wear resistance. It can withstand large stresses and deformations and is suitable for applications requiring high strength and durability.
Sealing performance: Due to its excellent oil resistance and elastic recovery, XNBR is often used to manufacture sealing materials such as seals, gaskets and O-rings.

What are XNBR rubber products?

XNBR (carboxylated nitrile butadiene rubber) is widely used in industry and can be used to manufacture various rubber products.

Seals: XNBR rubber products are widely used in sealing applications due to their excellent oil resistance and sealing properties. For example, O-rings, sealing gaskets, sealing rings, etc.
Rubber pipes and pipe fittings: XNBR rubber products can be used to manufacture oil-resistant and heat-resistant rubber pipes and pipe fittings for transporting liquid media such as petroleum, fuel oil, and lubricating oil.
Auto parts: XNBR rubber products are widely used in the automotive industry. For example, automobile engine seals, oil seals, rubber baffles, suspension parts, etc.
Industrial sealing: XNBR rubber products are suitable for sealing applications in the industrial field, such as valve seals, pump seals, sealing gaskets, etc.
Gloves and protective equipment: XNBR rubber products can be used to make protective equipment such as industrial gloves and chemical protective suits, providing corrosion resistance and protection against chemicals and grease.
Electrical insulation parts: XNBR rubber products have good electrical insulation properties and can be used to manufacture electrical insulation parts such as wire and cable joints and insulating gaskets.
Medical devices: Because XNBR rubber has good biocompatibility, it can be used to manufacture medical device seals, pipes, gloves, etc.

What are the limitations of XNBR rubber seals?

Limited range of chemical resistance: Although XNBR rubber has good oil resistance to general petroleum products and lubricants, its chemical resistance may be limited in the environment of certain special chemicals and solvents. When selecting XNBR rubber seals, the specific chemical medium and its concentration need to be carefully considered.
High-temperature performance limitations: Compared with other high-temperature rubber materials, XNBR has lower high-temperature resistance. In high-temperature environments, XNBR rubber seals may harden, deform, or lose elasticity, resulting in reduced performance.
Compression Set: XNBR rubber may undergo permanent deformation when exposed to prolonged or high pressure, especially at high temperatures. This can cause the seal to lose its original shape and sealing ability.
Dynamic Sealing Performance: XNBR rubber seals can struggle and wear in some dynamic sealing applications. When seals move frequently or rub against other surfaces, it can cause wear, leakage, or shortened life.
Higher price: Compared with some common rubber materials, XNBR rubber has a higher cost, which may be a consideration in some applications.

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