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.
Enflon® Compounds
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.:
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
- ENFLON 106 – 30% Glass Fiber
Contact us for a customized blend.
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
Contact us for a customized blend.
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 118 – 60% Bronze
Contact us for a customized blend.
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 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.
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
Contact us for a customized blend.
Colors
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 196 – Purple
- ENFLON 197 – Brown
- ENFLON 198 – Grey
- ENFLON 199 – Black
Contact us for a customized blend.
Common Enflon® Blends
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 | 10% Carbon-Graphite |
| ENFLON 137 | 20% Carbon-Graphite |
| ENFLON 138 | 25% Carbon-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 |
Custom Enflon® Blends
The following customs blends are also available from Enflo:
| Blend | Description |
| ENFLON 140 | 5% Calcium Flouride |
| ENFLON 141 | 10% Calcium Flouride |
| ENFLON 142 | 15% Calcium Flouride |
| ENFLON 143 | 20% Calcium Flouride |
| ENFLON 179 | 50% Stainless Steel |
| ENFLON 166 | Maroon material for high wear resistance and low friction in a continuous, non-lubricated service. |
| ENFLON 169 | Maroon material with low deformation under compressive load |
| ENFLON 168 | Gold-filled material used for low abrasion and used against soft surfaces |
| ENFLON 550 | Bronze/green fill |
| ENFLON 185 | Mineral-fill |
More Information
To learn more about Enflon® Filled PTFE, download the datasheet.
You can also download the complete Enflo Product Guide to learn about all Enflo products.