Compounds

Silicone Rubber (Q, MQ, VMQ, PVMQ)

Physically, silicones are based on silicon, an element derived from quartz. To create this class of synthetic elastomers, pendant organic groups such as methyl, phenyl and vinyl are attached to silicon atoms. The different addition of side chains can achieve significant variations in properties. Silicones have excellent heat, ozone and corona resistance, very well dielectric stability, and resistance to many oils, chemicals, and solvents. And for all elastomers, silicones possess the best flexible property at low temperature. But it also have some weakness like low tensile strength, poor tear and wear resistance.

Service Temperature

For Silicones the service temperature are from -60'C to 230'C.

Hardness

10 to 90 Shore A are available

Color

Any Color we can design for you.

Application

Silicone rubber performs well under environmental and temperature extremes, it usually be applied in automative and aerospace, where flexibility and longevity are important. It also has an outstanding electrical insulating properties, applying in strict performance standards are critical. And it is suitable material for parts that need FDA approval for food handling equipment and appliances.

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Fluorosilicone Rubber (FVMQ)

Fluorosilicone is like silicone rubber, bonding trifluoropropyl, methyl, and vinyl as side chins. The mechanical and physical properties are similar to VMQ. However, FVMQ offers improved fuel and mineral oil resistance.

Service Temperature

For FVMQ the service temperature are from -60'C to 177'C. In dry heat, the serviceable temperatures range can extend to 232'C.

Hardness

45 to 80 Shore A are available.

Color

Black, Yellow are available, or any color we can design for you.

Application

FVMQ offers excellent low-temperature flexibility and good for fuel and aromatic mineral oil. It is usually applied in contact with jet and automative fuels, most solvents, or engine oil, especially in aerospace industry.
 

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Fluorocarbon (FKM)

Fluorocarbon is a very known high performance rubber, especially because it has excellent resistance to high temperatures, ozone weather, oxygen, mineral oil, hydraulic fluids, aromatics, many organic solvents and chemicals. Now we can supply parts made by Viton so Irony, so lexis. We can also supply excellent acid and alkali resistance parts by AFLAS.

Service Temperature

For general type the service temperature is better limited to approximately from -26'C(-15'F) to 232'C(450'F) in static application, though the service temperature can arrive to 275'C at short time but up to 232'C the parts life will be shortened. In dynamic applications it is suitable between -15'C and 200'C

Hardness

For general type the hardness from 50 to 90 Shore A available. For others type 60 to 90 Shore A are appropriate.

Color

Now black, brown, green, white, are available, or any color we can design for you.

Application

Because FKM has excellent resistance of high temperature, oil, solvent, flame, chemical and weather, it is usually applied in automotive, chemical processing, aerospace and many industrial.
 

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Butyl Rubber (IIR)

Butyl rubber is produced by copolymerizing isobutylene with small amounts of isoprene. It is like EPDM possessing excellent resistant to chemical and polar fluid, outstanding electrical insulation and good ozone resistance. The special properties of butyl rubber are low gas and moisture permeability and high shock absorbtion. These properties have made butyl rubber the polymer choice in a variety of applications.

Service Temperature

For IIR the service temperature can be designed from -55'C to 100'C

Hardness

50 to 70 Shore A are available
 

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Ethylene / Acrylic elastomer (AEM)

Ethylene / Acrylic elastomer is a copolymer of ethylene and methyl acrylate, plus a small amount of cure site monomer containing carboxylic acid groups. AEM is a tough, low-compression-set rubber with excellent resistance to high temperatures, hot mineral oil fluids and weathering. The low temperature flexibility and mechanic properties are better than ACM, but it is not well resistant to low aniline oil (like ASTM No. 3 oil) and polar solvents.

Service Temperature

For standard ACM the service temperature is -30'C to 150'C shortened lifetime upto 175'C

Hardness

40 to 85 Shore A are available

Color

Black is available.

Application

ACM is typically chosen for applications requiring improved performance versus nitride rubber, Neoprene or reduce cost versus higher-end elastomers such as HNBR, FKM. It also usually is applied in automative industry.
 

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Ethylene Propylene Rubber (EPM, EPDM)

EPM is a Copolymer of ethylene and propylene, EPDM is terpolymer of ethylene and propylene with a small amount of a third monomer (usually a diolefin) to permit vulcanization with sulfur. Generally Ethylene Propylene Rubber posses excellent resistance to ozone, sunlight and weathering, and have very good flexibility at low temperature, good chemical resistance (many dilute acids and alkalis, polar solvents), and good electrical insulation property.    

Service Temperature

For EPDM the service temperature can be designed from -55℃ to 125℃ or up to 150℃ (for peroxide cured systems).

Hardness

40 to 90 Shore A are available. 

Color

Black, brown, white, yellow, and gray are available, or any color we can design for you. 

Application

In phosphate-ester based hydraulic fluids and glycol based brake fluids systems Ethylene Propylene Rubber is good choice for sealing parts. Appling in domestic water, rubber parts must pass the chloramine and chlorine resistance test. It is not suitable for any types Ethylene Propylene Rubber, higher saturated EPDM or EPM and higher ethylene content will be well for chloramine and chlorine attacking. It also usually be used in hot water or steam up to 150℃.

Ethylene Propylene Rubber is not suitable in petroleum fluid (fuels, mineral oils, greases).

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Natural Rubber (NR)

Natural rubber is produced from the latex of the Hevea brasiliensis, the chemical name of polymer is polyisoprene. Polyisoprene also can be synthesized by polymerization from its monomer isoprene. Natural rubber possesses many excellent physical properties including high resilience and strength, good abrasion resistance. The defects are like SBR, having poor resistant to hydrocarbon oil and not suitable in UV, oxygen, ozone because the double bond in the polymer backbone. But its poor weathering resistance can be modified by special additive.

Service Temperature

For NR the service temperature can be designed from -50℃ to 70℃, and up to 100℃ at short time. 

Hardness

40 to 90 Shore A are available.

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Styrene-Butadiene Rubber (SBR)

The most widely synthetic rubber in the entire world is SBR, a copolymer of styrene and butadiene. The most part of SBR rubber is used in tire by blending with natural rubber and butadiene rubber. SBR is weak and unusable without reinforcement by carbon black, but with carbon black it is strong and abrasionresistant. The defects of SBR are poor resistant to oil and not suitable in weathering, UV, oxygen, ozone because the double bond in the polymer backbone.

Service Temperature

The service temperature of SBR can be designed from -55℃ to 100℃.

Hardness

50 to 70 Shore A are available.

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Chloroprene Rubber (CR)

Chloroprene was one of the first successful synthetic elastomers in 1931 by Dupont. It is prepared by emulsion polymerization of chloroprene, or 2-chlorobutadiene. CR is a multi-purpose elastomer which yields a balanced combination of properties. It has good resistant to sun, ozone, weather and perform well in contact with oils and many chemicals. It also display outstanding physical toughness and good resistant to fire.

Service Temperature

The service temperature of Chloroprene can be designed from -40℃ to 100℃ or up to 125℃ depending on different grades. Generally higher than 100℃, life time will be shortened.

Hardness

30 to 90 Shore A are available.

Color

Black, white, rust, yellow and blue are available, or any color we can design for you.

Application

Chloroprene has been used thousands of diverse environments, including automotive, wire and cable industries.

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Acrylonitrile-Butadiene (NBR)

Copolymers of butadiene and acrylonitrile are known by several generic names, Buna N, Nitrile Rubber and NBR. The acrylonitrile content of NBR compounds varies considerably (18% to 50%) and influences the physical properties of the finished material.

The higher the acrylonitrile content, the better the resistance to oil and fuel. At the same time, elasticity, compression set resistance to low temperature is adversely affected. The lower acrylonitrile content obtains excellent low temperature resistance but sacrifice some resistance to oil and fuel. In view of these opposing realities, a compromise selection is the medium acrylonitrile content rubber. NBR has good mechanical properties when compared with other elastomers and high wear resistance.

NBR is not resistant to weathering and ozone. Some special compound can improve this defect or use NBR/PVC blending compound which has excellent weathering and ozone resistance and good resistant to fuel but compression set is not well.

SERVICE TEMPERATURE

For NBR the service temperature can be designed from -55℃ to 100℃ or up to 125℃ depending on different acrylonitrile content and formula. Generally higher than 100℃, life time will be shortened.

Hardness

40 to 90 Shore A are available.

Color

Black, brown, white, and gray are available, or any color we can design for you.

Application

NBR compounds have excellent resistance to abrasion, non-polar oils and solvent, water and permeation (higher acrylonitrile content will be better). NBR also can be used in conditions of dilute acids, alkalis and salt solution at low temperatures.

Appling in aromatic hydrocarbons, chlorinated hydrocarbons and polar solvents are not suitable.

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Hydrogenated Nitrile (HNBR) or Highly Saturated Nitrile (HSN)

Hydrogenated Nitrile is a synthetic polymer that is obtained by saturating the hydrocarbon chains of Nitrile rubber with hydrogen. This special hydrogenation process reduce lots of double bonds in main chain of NBR polymer, so HNBR possess superior heat, ozone, chemical resistance and mechanical characteristics over standard Nitriles.

Service Temperature

For HNBR the service temperature is from -40℃ to 150℃ and some special compound can up to 160℃.

Hardness

55 to 90 Shore A are available.

Color

Black, green, blue, brown, rust and gray are available, or any color we can design for you.

 Application

HNBR has wide applications in auto and oil industries. For environment requirement HCFC will be replaced by ozone-safe refrigerants-HFCs. In old air conditioning and refrigeration equipment Chloroprene (CR) and Fluoroelastomer (FKM) are popular material with coolant system of HCFC (or CFC) and mineral oil. But CR and FKM is not adequate in the newer coolant system HFC134a (R134a) and PAG lube, because CR will degrade PAG lube and FKM will swell more in R134a, the available rubber is HNBR.