Enflon® Filled PTFE

Thanks to its versatility, Virgin (unfilled) PTFE is an ideal choice for a wide range of applications. However, the properties of PTFE can also be enhanced by adding “fillers” such as graphite, carbon, glass, bronze, and other materials. Generally speaking, these filled PTFE compounds maintain their original chemical and thermal resistance characteristics, while also exhibiting improved strength, stability, and/or durability.

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Enflon® Compounds

Pexco’s Enflon® brand of Filled PTFE products offer a wide variety of improvements to material characteristics and properties. Most blends can be customized depending on the application.

Glass Fiber

Milled glass fibers have the least effect on chemical and electrical properties and add greatly to the mechanical properties of unfilled PTFE. The addition of glass improves compressive properties by as much as 40% and improves wear resistance greatly. These compounds resist acids and oxidation, but can be attacked by alkalis.

ENFLON 101 – 5% Glass Fiber
ENFLON 102 – 10% Glass Fiber
ENFLON 103 – 15% Glass Fiber
ENFLON 104 – 20% Glass Fiber
ENFLON 105 – 25% Glass Fiber

Graphite

Graphite offers improved chemical resistance to corrosive environments and exhibits good initial wear and rubbing/sliding characteristics in dry and water applications. Graphite is commonly blended with carbon and PTFE.

ENFLON 110 – 5% Graphite
ENFLON 111 – 10% Graphite
ENFLON 112 – 15% Graphite
ENFLON 113 – 20% Graphite
ENFLON 114 – 25% Graphite
ENFLON 109 – 30% Graphite

Bronze

This filler has better wear, creep resistance, and higher thermal conductivity than glass fiber with PTFE. The compound is easily machined, but has poor chemical resistance in the presence of acids and alkali. Useful in applications which undergo high mechanical loads or high-speed rubbing contacts where the bronze filler supplies the strength and conductivity to carry away excess, unwanted heat.

ENFLON 115 – 25% Bronze
ENFLON 116 – 40% Bronze
ENFLON 117 – 15% Bronze
ENFLON 118 – 60% Bronze

Carbon

Carbon has good chemical resistance to corrosive environments. It exhibits good initial wear and rubbing or sliding contact characteristics, both dry and water applications. It is frequently used in piston rings to reduce cylinder wall wear by entrapping abrasive foreign particles in their relatively soft surfaces.

ENFLON 128 – 2% Carbon (Static Dissipated)
ENFLON 130 – 5% Carbon
ENFLON 131 – 10% Carbon
ENFLON 132 – 15% Carbon
ENFLON 132E – 15% Carbon FDA
ENFLON 133 – 20% Carbon (Static Dissipated)
ENFLON 134 – 25% Carbon
ENFLON 135 – 33% Carbon

Carbon Fiber

Carbon Fiber lowers creep and increases flex and compressive modulus. It raises hardness properties and exhibits wear characteristics in water applications. It is often the best choice in automotive applications such as shock absorbers and water pumps. It is an excellent material for use in piston rings, bearings and thrust washers. A 15% fill is typically called out in certain AMS specifications, however customer specific fill percentages are available upon request.

ENFLON 304 – 25% Carbon Fiber
ENFLON 305 – 15% Carbon Fiber

Molybdenum Disulfide

This filler is used frequently in combination with others to increase surface hardness, stiffness, and to reduce the starting coefficient of friction and steady-state wear. Its effect on electrical and chemical properties is negligible.

ENFLON 127 – 5% Molybdenum Disulfide

Colors

Colors are often added to PTFE for product identification, visibility, and/or branding.

ENFLON 191 – Red
ENFLON 193 – Yellow
ENFLON 194 – Green
ENFLON 195 – Blue
ENFLON 195EFDA – Blue FDA
ENFLON 199 – Black

Multi-Filler Enflon® Blends

Often, two or more fillers will be combined to provide very specific PTFE characteristics.

ENFLON 129 – 30% Carbon, 3% Graphite
ENFLON 136 – 8% Carbon, 2% Graphite
ENFLON 137 – 18% Carbon, 2% Graphite
ENFLON 138 – 23% Carbon, 2% Graphite
ENFLON 144 – Turkite/ 40% Bronze, 2% Green
ENFLON 146M – 18% Carbon, 10% Glass
ENFLON 149 – 5% Glass, 5% Molybdenum Disulfide
ENFLON 150 – 10% Glass, 5% Molybdenum Disulfide
ENFLON 151 – 15% Glass Fiber, 5% Molybdenum Disulfide
ENFLON 152 – 20% Glass Fiber, 5% Molybdenum Disulfide, 5% Carbon
ENFLON 153 – 23% Glass Fiber, 2% Molybdenum Disulfide

ENFLON 155 – 25% Glass Fiber, 5% Molybdenum Disulfide
ENFLON 157 – 10% Glass Fiber, 10% Graphite
ENFLON 158 – 5% Glass Fiber, 5% Graphite
ENFLON 159 – 20% Glass Fiber, 5% Graphite
ENFLON 161 – 10% Glass Fiber, 5% Carbon
ENFLON 162 – 5% Glass Fiber, 10% Carbon
ENFLON 170 – 40% Bronze, 5% Molybdenum Disulfide
ENFLON 171 – 40% Bronze, 10% Molybdenum Disulfide
ENFLON 172 – 55% Bronze, 5% Molybdenum Disulfide
ENFLON 173 – 65% Bronze, 5% Molybdenum Disulfide

Custom Enflon® Blends

The following custom blends are also available:

ENFLON 143 – 20% Calcium Fluoride
ENFLON 185 – 2% mineral-filled, calcium silicate
ENFLON 190 – Enflo’s alternative to FLUOROGOLD® is made from a special blend of PTFE that contains a glass fiber aggregate. This material which is yellow in color, has significant compressive strength without cold flow, and retains the low friction and chemically inert characteristics of unfilled PTFE. Not affected by sunlight or ozone. Typical applications include cryogenics and situations where spontaneous ignition is possible.
ENFLON 166 – Maroon in color, this material provides high wear resistance and low friction in a continuous, non-lubricated service. Good dielectric and insulation properties. Excellent choice for bearings, gaskets and high-pressure applications requiring robust components. Alternative to Rulon® LR.
ENFLON 168 – Gold in color, this material is used for low abrasion and used against soft surfaces. Low coefficient of friction and designed to run dry without lubrication. Alternative to Rulon® J.

ENFLON 169 – Maroon in color, this material has high wear and chemical resistance properties. Designed to run dry without lubrication. Used in seal, piston cup, and bearing applications. Alternative to Rulon® AR.
ENFLON 175 – White in color, this material offers excellent load and wear resistance, good chemical resistance. FDA compliant. Designed to run dry without lubrication. Alternative to Rulon® 641.
ENFLON 300 – Virgin
ENFLON 300E – Virgin, Extruded
ENFLON 301 – Premium, Virgin
ENFLON 302 – Modified, Virgin
ENFLON 302E – Modified, Extruded
ENFLON 306 – Soft Carbon Graphite
ENFLON 318 – 50% 410 Stainless Steel, Virgin PTFE (Magnetic and metal-detectable)
ENFLON 319 – 50% 316 Stainless Steel, Virgin PTFE (Metal-detectable)
ENFLON 320 – Modified, 50% 316 Stainless Steel
ENFLON 500B – 23% Glass, 2% Blue pigment
ENFLON 550 – Bronze/Green fill
ENFLON 700 – Reprocessed

High-Performance Materials

When searching for high performing materials for bearings, seals, gaskets and other extreme wear and friction applications, Enflo offers excellent alternatives to several Rulon® materials with its Enflon 166, 168, 169 and 175 blends, as well as its alternatives for Gylon® and Durlon® materials.

The following Enflon® blends are alternatives to Rulon®, Gylon® and Durlon® materials:

ENFLON 166

Maroon in color, this material provides high wear resistance and low friction in a continuous, non-lubricated service. Good dielectric and insulation properties. Excellent choice for bearings, gaskets and high pressure applications requiring robust components. Alternative to Rulon® LR.

ENFLON 168

Gold in color, this material is used for low abrasion and used against soft surfaces. Low coefficient of friction and designed to run dry without lubrication. Alternative to Rulon® J.

ENFLON 169

Maroon in color, this material has high wear and chemical resistance properties. Designed to run dry without lubrication. Used in seal, piston cup, and bearing applications. Alternative to Rulon® AR.

ENFLON 175

White in color, this material offers excellent load and wear resistance, good chemical resistance. FDA compliant. Designed to run dry without lubrication. Alternative to Rulon® 641.

ENFLON 310

Enflon® 310 is used in applications with strong acids and solvents. Creep and cold flow can be are reduced with this blend. Enflon® 310 is typically used in gasket applications where a tight seal and improved performance over unfilled PTFE is required. Alternative to Gylon® 3500.

ENFLON 311

Enflon® 311 is designed for use in aggressive chemical applications including nitric acid, caustics and hydrogen peroxide. This blend is excellent for use as a gasket material especially in the pulp and paper industry and in railroad tankcar applications. Alternative to Durlon® 9200W.

ENFLON 312

Enflon® 312 is a blend combined with inorganic fillers. It provides a dimensionally stable product under compressive load and improves cold flow problems associated with Virgin PTFE. This fill is used in the chemical, pulp and paper, food and beverage and railwood tankcar industries. It is recommended for severe chemical applications. Additionally, it has a higher bolt torque retention compared to other filled PTFEs. Alternative to Durlon® 9000.