Common
In industrial sealing, material selection directly impacts the lifespan, reliability, and stability of seals. Best Ring Group uses high-performance elastomers tailored to industry needs and operating conditions, providing reliable sealing solutions that meet international standards.
Below is a brief overview of commonly used elastomer materials and their applications.
| Compound | Definition | Charater | Recommend | Not Recommend | Application |
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| NBR | Nitrile rubber (NBR) is an oil-resistant elastomer, with its oil resistance depending on the acrylonitrile (ACN) content. Increasing the ACN content reduces low-temperature flexibility and increases compression set, while decreasing gas permeability. It also enhances heat aging and ozone resistance, as well as improves tensile strength, wear resistance, hardness, and density. |
Oil-resistant, water-resistant, wear-resistant, high-pressure resistant, but not resistant to aggressive solvents. |
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| EPDM | Ethylene Propylene Diene Monomer (EPDM) rubber has moderate tensile strength, but exhibits excellent resistance to weathering, ozone, and chemical corrosion, as well as good electrical insulation properties. Peroxide-cured EPDM further demonstrates outstanding heat and aging resistance. | Aging-resistant, ozone-resistant, weather-resistant, chemical-resistant, wear-resistant, water-repellent, and resistant to alcohols and ketones; not suitable for food contact or exposure to aromatic hydrocarbons. |
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| FKM | Fluoroelastomers (FKM) generally exhibit good resistance to compression set, low gas permeability, and excellent resistance to ozone and sunlight. Over the past fifty years, these outstanding properties have made FKM seals widely used in a variety of high-demand applications. Although originally developed for the aerospace industry, FKM compounds are now extensively employed in automotive, household appliances, fluid handling, and chemical processing industries. |
Heat-resistant, oil-resistant, chemical-resistant, and solvent-resistant; not resistant to ketones, esters, or nitrated compounds. |
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| SILICÓN | Silicone (Silicón) exhibits excellent resistance to oxygen, ozone, and UV radiation, and has an extremely wide operating temperature range. Due to its highly saturated nature, it requires peroxide curing, as saturated polymers cannot be vulcanized with sulfur. Additionally, silicone is generally inert, tasteless, odorless, non-toxic, and mildew-resistant. It also possesses excellent elastic recovery and low compression set. | Heat- and cold-resistant, non-toxic, with good electrical insulation; not resistant to oils, ozone, or solvents. |
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| CR | Chloroprene Rubber (CR) exhibits good weather, ozone, and oil resistance, along with moderate flame resistance. With balanced physical properties, it is widely used in industrial seals and general rubber products. | Good elasticity, excellent weather resistance and flame retardancy, ozone resistance, heat resistance, chemical resistance, wear resistance, resistance to atmospheric aging, resistant to animal and vegetable oils, with moderate oil resistance. |
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Tool handles, O-rings, hoses, flame-retardant components, and outdoor seals |
| HNBR |
Hydrogenated Nitrile Rubber (HNBR) is a hydrogenated, improved version of NBR, enhancing its heat, ozone, and oil resistance. It is a high-performance elastomer suitable for high-temperature and fuel-resistant applications. |
Wear-resistant, corrosion-resistant, tensile- and tear-resistant, oxidation- and compression-resistant, with excellent heat resistance (150–170°C), outstanding oil and fuel resistance, and ozone resistance. |
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Automotive oil seals, fuel systems, air-conditioning compressor seals, and high-wear-resistant seals |
| NR | Natural Rubber (NR) possesses exceptional elasticity, wear resistance, and tear strength, making it one of the most elastic materials available. | Excellent elasticity, tear-resistant, ultra-high abrasion resistance, water-resistant; not resistant to strong acids or aging. |
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Anti-vibration pads, spring washers, and abrasion-resistant products |
| SBR |
Styrene-Butadiene Rubber (SBR) has better heat and aging resistance than NR, but slightly lower elasticity. It is a commonly used base rubber in industrial applications. |
Moderate abrasion resistance, good processability, aging-resistant, water-resistant, and cost-effective; maintains shape at high hardness; not resistant to strong acids, ozone, oils, greases, fats, or hydrocarbons. |
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Gaskets, rubber strips, impact-damping components, and industrial tire treads |
| XNBR | Carboxylated nitrile rubber (XNBR) is a modified type of NBR, offering higher abrasion and tear resistance, as well as improved oil resistance. |
Excellent abrasion resistance Good oil resistance |
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| IIR | The characteristics of butyl rubber (IIR) are its extremely low gas permeability, excellent weather resistance and acid–alkali resistance, and good chemical inertness. |
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| AEM |
Ethylene‑acrylate rubber (AEM) is a material that balances high-temperature resistance and oil resistance, used for heat-resistant automotive components. It is more flexible than ACM. |
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| ACM |
ACM (Acrylic rubber) has excellent heat and oil resistance but exhibits lower elasticity and poor low-temperature performance. |
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