In most situations, PTFE is an ideal choice for a wide range of applications. There are occasions, however, when additional “fillers” such as graphite, carbon, glass, bronze, and other materials are added to enhance PTFE products for use in a specific application. Generally speaking, these “Filled PTFEs” maintain their original chemical and thermal resistance characteristics, while also exhibiting improved strength, stability, and/or durability.
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Enflo’s Enflon brand of Filled PTFE products are blended in our plant to offer a wide variety of improved material characteristics and properties. Enflo offers the following standard fills, and we can duplicate most PTFE blends:
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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
- ENFLON 106 – 30% Glass Fiber
Contact us for a customized blend.
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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
Contact us for a customized blend.
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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 118 – 60% Bronze
Contact us for a customized blend.
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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 130 – 5% Carbon
- ENFLON 131 – 10% Carbon
- ENFLON 132 – 15% Carbon
- ENFLON 133 – 20% Carbon
- ENFLON 134 – 25% Carbon
Contact us for a customized blend.
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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 305 – 15% Carbon Fiber
Contact us for a customized blend.
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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
Contact us for a customized blend.
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Colors are often added to PTFE for product identification, visibility, and/or branding.
- ENFLON 191 – Red
- ENFLON 192 – Orange
- ENFLON 193 – Yellow
- ENFLON 194 – Green
- ENFLON 195 – Blue
- ENFLON 199 – Black
Contact us for a customized blend.
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Often, two or more fillers will be combined to provide very specific PTFE characteristics. The following blends are available from Enflo:
| Blend | Description |
| ENFLON 136 | 8% Carbon, 2% Graphite |
| ENFLON 137 | 18% Carbon, 2% Graphite |
| ENFLON 138 | 23% Carbon, 2% Graphite |
| 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 |
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The following customs blends are also available from Enflo:
| Blend | Description |
| ENFLON 140 | 5% Calcium Fluoride |
| ENFLON 141 | 10% Calcium Fluoride |
| ENFLON 142 | 15% Calcium Fluoride |
| ENFLON 143 | 20% Calcium Fluoride |
| 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 318 | 50% 410 Stainless Steel, blended with standard virgin PTFE. Magnetic and metal-detectable. |
| 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 550 | Bronze/green fill |
Enflon® Filled PTFE products are not affiliated with Rulon® or FLUOROGOLD® in any way.
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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:
| Blend | Description |
| 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. |
Contact us for a customized blend.
Enflon® Filled PTFE products are not affiliated with Rulon®, FLUOROGOLD®, Gylon® or Durlon® in any way.