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Rubber Rings | Rubber Parts Manufacturer - YUANYU

Yuanyu Rubber Enterprise Co. Ltd. is one of the prime rubber parts manufacturers from Taiwan since 1981. The rubber products including rubber grommets, rubber rings, o rings, rubber seals, rubber bumpers, rubber gaskets and more.

ISO & RoHS certified, 4,000 sq.m production plant, molded rubber products from rubber properties such as NR, NBR, NBR+PVC, HNBR, VMQ, FKM, ACM, ECO, CSM, etc.

Both with rubber molding technology and 37 years of experience, YUANYU ensures each customer's demands are met.

Properties

Properties and Usage

Rubber Properties and Usage

NR | NBR | NBR+PVC | HNBR | CR | EPM,EPDM | IR | IIR | SBR | BR | VMQ | FVMQ | FKM, FPM | ACM,AEM,ANM | ECO,CO| CSM


Open Rubber Property Chart


NR (Natural Rubber)

  • A general purpose rubber with the optimum balance of physical properties essential for high performance engineering applications.
  • The working temperature range is considered to be -50°C/ -70°C to +120°C.
  • Long fatigue life, first choice for spring applications.
  • Has high strength without the need for reinforcing fillers.
  • Can be compounded to give a wide range of hardness.
  • Good low temperature flexibility.
  • Poor resistance to oils and solvents.
  • Requires protection against oxidisation, ozone and heat.

NBR (Nitrile-butadiene Rubber)

  • NBR is the most widely used elastomer in the seal industry today.
  • Good resistance to low temperature.
  • NBR is often necessary to sacrifice some high temperature resistance.
  • The working temperature range is considered to be -35°C to +120°C (-30°F to +250°F).
  • Good tear, and abrasion resistance.
  • NBR resists oil-based hydraulic fluids, fats, animal and vegetable oils, flame retardant liquids, grease, water, and air.
  • Special low-temperature compounds are available for mineral oil-based fluids.
  • Poor resistance to ozone, sunlight, or weather. They should not be stored near electric motors or other ozone generating equipment.
  • By CR, Hypalon, or PVC blending, the NBR can meet a more specified range of physical or chemical requirements.

NBR+PVC

  • PVC resins are blended with NBR to provide increased resistance to ozone and abrasion.
  • The PVC also provides a significant improvement in solvent resistance, yet maintains similar chemical and physical properties of NBR.

HNBR (Hydrogenated Nitrile Butadiene Rubber)

  • HNBR has excellent resistance to common automotive fluids (e.g., engine oil, coolant, fuel, etc.) and many industrial chemicals.
  • The working temperature range is considered to be -40°C to +165°C.
  • Good resistance to long-term exposure to heat, oil, and chemicals. Also good with aging resistance and low temperature resistance.
  • The automotive market is the largest consumer, using HNBR for a host of dynamic and static seals, hoses, and belts.
  • Disadvantage: expensive.

CR (Chloroprene Rubber, Neoprene)

  • CR was the earliest synthetic rubbers used to produce seals.
  • CR has good aging characteristics in ozone and weather environments, along with abrasion and flex cracking resistance.
  • CR is not effective in aromatic and oxygenated solvent environments.
  • The working temperature range is considered to be -40°C to +110°C.(-40°F to +230°F) But for short working periods it will take even 120°C.
  • Good gasoline resistance.

EPM, EPDM (Ethylene Propylene Rubber)

  • EPM/EPDM has a temperature range of -50°C to +120°/150°C (-60°F to +250°/300°F), depending on the curing system.
  • It has a great acceptance in the sealing world because of its excellent resistance to heat, water and steam, alkali, mild acidic and oxygenated solvents, ozone, and sunlight.
  • EPM/EPDM compounds are not recommended for gasoline, petroleum oil and grease, and hydrocarbon environments.
  • Good resistance to brake fluid.

IR (Isoprene Rubber)

  • Very similar properties to natural rubber but more difficult to process.
  • The working temperature range is considered to be -50°C/ -70°C to +120°C.
  • Electrical properties better than NR.

IIR (Butyl)

  • Butyl has excellent resistance to phosphate ester fluids.
  • It has an inferior high temperature limit when compared to EPM.
  • The temperature service range for this material is -55°C to +105°C (-65°F to +225°F).
  • Good ozone, weather environments, abrasion, chemical, and cracking resistance.
  • Excellent air Impermeability.
  • Poor gasoline and hydrocarbon resistance.

SBR (Styrene-butadiene Rubber)

  • SBR must be compounded with reinforcing fillers for high strength and then has physical and chemical properties similar to NR.
  • It is not suitable for springs but has used widely for vehicle tyres where it is generally oil extended.
  • Excellent abrasion resistance.
  • The working temperature range is considered to be -50°C to +110°C (-65°F to +225°F).

BR (Butadiene Rubber)

  • Good temperature flexibility and high abrasion resistance under severe weather conditions.
  • Main use in in manufacture of tyres.
  • The working temperature range is considered to be -73°C to +120°C.
  • Used in blends with SBR and NR.
  • Poor processing properties and poor tear properties.

VMQ (Silicone)

  • Moderate physical properties but are retained at high or low temperatures.
  • Good electrical properties and good ozone resistance.
  • The working temperature range is considered to be -50°C (-58°F) to +232°C (+450°F).
  • PMQ, PVMQ have even lower low-temperature resistance (-73°C~-90°C).
  • low tear strength and poor abrasion resistance.
  • Poor oil, and poor chemical resistance.

FVMQ (Fluoro-silicone)

  • Fluorosilicone combines the good high- and low-temperature properties of silicone with limited fuel and oil resistance.
  • FVMQ provide a much wider operational temperature range than Fluorocarbon rubbers.
  • The working temperature range is considered to be -73°C (-100°F) to 200°C (390°F).
  • FVMQ O-rings may also be exposed to petroleum based oils and/or hydrocarbon fuels.
  • Due to relatively low tear strength, high friction and limited abrasion resistance of these materials, they are generally recommended for static applications only.
  • FVMQ with high tear strength are also available. Some of these compounds exhibit improved resistance to compression set.
  • Disadvantage: too expensive.

FKM, FPM (Viton, Fluorel)

  • FKM O-rings should be considered for use in aircraft, automobile and other mechanical devices requiring maximum resistance to elevated temperatures and to many fluids.
  • FKM used in applications to resist harsh chemical and ozone attack.
  • The working temperature range is considered to be -26°C to +205°/230°C (-15°F to +400°/440°F). But for short working periods it will take even higher temperatures.
  • FKM resist mineral oils and greases, aliphatic, aromatic and also special chlorinated hydrocarbons, petrol, diesel fuels, silicone oils and greases.
  • Disadvantage: too expensive. Especially perfluoroelastomer(FFKM).

ACM, ANM, AEM (Alkyl Acrylate Coplolymer)

  • Good resistance at normal and elevated temperatures to oil and oxygen.
  • Excellent ozone and and weathering resistance.
  • The working temperature range is considered to be -0°C to +150°C. But for short working periods it will take even to 180°C.
  • Poor water, moist heat, and low-temperature resistance.
  • AEM (Ethylene Acrylate Rubber), Cold flexibility between -29°C and -40°C (-20°F and -40°F)

ECO, CO (Epichlorohydrin)

  • ECO compounds are noted for their superior gas impermeability and physical properties over a wide temperature range while maintaining excellent resistance to petroleum oils.
  • It has a stable cycling capability from low to high temperature.
  • Service temperatures are -51°C to150°C (-60°F to +300°F).
  • Resistance to ozone, oxidation, weathering, and sunlight.
  • Disadvantage: expensive.

CSM (Hypalon)

  • Excellent resistance to oxygen, ozone, and most chemicals.
  • Low gas permeability.
  • Used for protective coatings.
  • The working temperature range is considered to be -20°C to +150°C.