Details for your reference



Nitrile / Buna N. / NBR

By far the most commonly used elastomer for o-rings and sealing products, Nitrile rubber is a mixture of butadiene and acrylonitrile. The majority of standard Nitrile compounds have a recommended temperature range of -40° to +225° F (-40° to +107° C). By adjusting the acrylonitrile content, this temperature range can be improved for lower temperature applications. Nitrile compounds can be manufactured at a lower cost and exhibit high abrasion, tear, and compression set resistance enabling them to outperform most other elastomers in both cost and performance.

Nitrile performs well in:

  • Water (below 212° F)
  • Petroleum based fuels or oils
  • Ethylene glycol
  • Silicone based oils

Nitrile does not perform well in:

  • Glycol based fluids (automotive brake fluid)
  • Benzene, toluene, xylene 9 (aromatic hydrocarbons often found in racing fuel)
  • Acetone, MEK (Ketones based fluid)
  • Phosphate ester based fluids (fire resistant hydraulic fluids)

Other Nitrile variations:

  • XNBR – Carboxylated rubber (increased strength)
  • HNBR – Hydrogenated Nitrile (increased chemical resistance)
  • Internally lubricated Nitrile (reduced friction)
  • FDA compounds (Food and Drug applications)
  • NSF compounds (Food and potable water applications)

Fluorocarbon

Probably best known by the trade name Viton®, fluorocarbon or fluoroelastomer compounds exhibit excellent chemical resistance to chemicals, oils, and extreme temperatures (-15° to +400° F). Although originally developed for aerospace use, fluorocarbon compounds can now be found in applications spanning automotive, scuba diving, chemical processing, and industrial equipment. In addition to its chemical resistance, fluorocarbon has an excellent resistance to ozone and sunlight (unlike Nitrile), as well as good compression set properties.

Fluorocarbon performs well in:

  • Acids
  • Petroleum based fuels or oils
  • Gasoline
  • Silicone based oils

Fluorocarbon does not perform well in:

  • Amines
  • Acetone, MEK (Ketones based fluid)
  • Hydrocarbons
  • Phosphate ester based fluids (fire resistant hydraulic fluids)

Other Fluorocarbon variations:

Many specific fluorocarbon compounds have been developed to deal with specific chemical, temperature, or fluid applications. Premiere Seals has the ability to manufacture the specific blend to meet your requirements.

Ethylene Propylene / EPM / EPDM

This combination of ethylene and propylene (EPM) and sometimes a diene monomer (EPDM), this material is a highly valued elastomer due to its chemical and physical properties. With a temperature range of -65° to +300° F (-54° to +149° C) and a strong ability to withstand heat, oxidation, ozone, weathering, and most specifically phosphate ester based hydraulic fluids, ethylene propylene is the go-to compound where fire resistant hydraulic fluids are used. EPM is also an electrical resistor and is insoluble in many polar solvents.

Ethylene Propylene performs well in:

  • Alcohols
  • Glycol based fluids (automotive brake fluid)
  • Acetone, MEK (Ketones based fluid)
  • Silicone based oils
  • Steam
  • Water

Ethylene Propylene does not perform well in:

  • Benzene, toluene, xylene 9 (aromatic hydrocarbons often found in racing fuel)
  • Petroleum oils

Silicone

Silicone is a polymer material based on silicon and oxygen atoms combined together with carbon and hydrogen. Generally stable, non-reactive, and resistant to extreme environments and temperatures -65° to +450° F (-55° to +300° C), silicone is relative easy to manufacture and shape, although it can have a higher than average mold shrinkage which must be accounted for. Silicone rubber is used throughout a variety of industries including automotive, cooking, electronics, medical devices, and hardware applications to name a few.

Silicone performs well in:

  • Mineral oils
  • Ozone
  • Extreme environments

Silicone does not perform well in:

  • Petroleum oils
  • Acetone, MEK (Ketones based fluid)
  • Steam

Polychloroprene

Best known by its trade name Neoprene ®, polychloroprene (or chloroprene) was originally developed to have better wear and chemical resistant properties over natural rubber. While the two are very similar in molecular structure and temperature range (-40° to +250° F), synthetically produced chloroprene has superior resistance to degrading over natural rubber. This makes this compound well suited for applications demanding high abrasion resistance, resilience, elongation, and insulation characteristics.

Polychloroprene performs well in:

  • Ammonia
  • Mild acids
  • Fluorocarbons
  • Silicone oils
  • Water

Polychloroprene does not perform well in:

  • Benzene, toluene, xylene 9 (aromatic hydrocarbons often found in racing fuel)
  • Acetone, MEK (Ketones based fluid)
  • Strong acids

Polytetrafluoroethylene / PTFE

Best known by its trade name Teflon®, polytetrafluoroethylene is a thermoplastic polymer which possesses extreme chemical resistance due to its molecular composition. PTFE is inert to almost all chemicals and solvents and has an extremely high coefficient of friction. Because of these chemical properties, it is an excellent choice where acids, alcohols, alkalis, esters, ketones, or hydrocarbons are present. PTFE also has an extremely broad temperature resistance from -300° to +500° F (-184° to 260° C).

Because of its chemical makeup, PTFE has no “memory” and can creep (Wikipedia link) which is advantageous as a seal, but only to a point. Excessive creep will eventually cause failure so PTFE is often “filled” with an additive such as glass fiber, carbon, graphite, bronze, or other compounds to resist this.

Polytetrafluoroethylene performs well in:

  • Acids
  • Alcohols
  • Esters
  • Ketones
  • Hydrocarbons
  • Space

Polytetrafluoroethylene does not perform well in:

  • Fluorine
  • Chlorine trifluoride

Fluorosilicone

Fluorosilicones combine the best characteristics of fluorocarbons (chemical resistance) and silicones (temperature stability / inert properties), making them very resilient. Their chemical makeup provides them with low compression set characteristics but also restricts them with poor abrasion resistance, strength issues, and a high coefficient of friction. Because of this, fluorosilicone should only be used in static applications.

Fluorosilicone performs well in:

  • Hydrocarbons
  • Ozone
  • Sunlight

Polytetrafluoroethylene does not perform well in:

  • Glycol based fluids (automotive brake fluid)
  • Acetone, MEK (Ketones based fluid)

Plastics

There are two types of plastics: thermoplastics and thermosetting polymers. Thermoplastics are the plastics that do not undergo chemical change in their composition when heated and can be molded again and again. Thermosetting polymers can melt and take shape only once because a chemical reaction occurs in the manufacturing process that is irreversible. After they have solidified, they stay solid.

Plastics are usually classified by their chemical structure. Some important groups in these classifications are the acrylics, polyesters, silicones, polyurethanes, and halogenated plastics. The properties of plastics are defined chiefly by the organic chemistry of the polymer such as hardness, density, resistance to heat, and their reaction to organic solvents, oxidation, and ionizing radiation.

Premiere Seals currently has the capability to manufacture the following types of plastics.

  • Polyethylene (PE)
  • High-density polyethylene (HDPE)
  • Polyvinyl chloride (PVC)
  • Low-density polyethylene (LDPE)
  • Polypropylene (PP)
  • Polystyrene (PS)
  • High impact polystyrene (HIPS)
  • Polyamides (PA)
  • Acrylonitrile butadiene styrene (ABS)
  • Polyethylene/Acrylonitrile Butadiene Styrene (PE/ABS)
  • Polycarbonate (PC)
  • Polycarbonate/Acrylonitrile Butadiene Styrene (PC/ABS)
  • Polyurethanes (PU)
  • Phenolics (PF)
  • Polyetheretherketone (PEEK)
  • Polytetrafluoroethylene (PTFE)

Metals

Metal is an element, compound, or alloy that is a good conductor of both electricity and heat. Most metals have high density and are typically malleable and ductile. Most pure (naturally occurring) metals are too soft, too brittle, or chemically reactive for practical use, so most metals utilized are alloys created to produce desirable characteristics. An alloy is a mixture of two or more elements in solid solution in which the major component is a metal.

Premiere Seals primarily manufactures products from Aluminum, Brass, and Steel.

Aluminum

Aluminum is a relatively soft, durable, lightweight, ductile, and malleable metal with appearance ranging from silvery to dull gray, depending on the surface roughness. It is nonmagnetic and does not easily ignite. Aluminum is an alloy valued for its high strength-to-weight ratio.

Extrusion works specifically well with aluminum, which can often become brittle during other types of processing. Through the extrusion process, an object can be created with a fixed cross-sectional profile to whatever length required.

Brass

Made up primarily of copper and zinc, brass is non-magnetic, conducts electricity well, and is easily cast and extruded. By varying the proportions of copper and zinc, or including other chemicals such as aluminum, iron, or manganese, unique compounds can be produced with varying properties. Harder, softer, corrosion resistant, and tear resistant formulations can be developed for your application.

Steel

Steel is an alloy of iron and other elements including carbon, manganese, phosphorus, sulfur, silicon, and traces of oxygen, nitrogen, and aluminum. These elements can be varied to control the hardness, ductility, and tensile strength qualities of the steel. We can manufacture any grade level of steel required for your application and finish with chrome plating, powder coating, painting, or nitriding as required.

With all of our metal products we can offer a bonded or over-molded solution with almost all of our Rubber based compounds.