Extreme Chemical Resistance and Temperature Performance, Enhanced with Fillers
PTFE (Polytetrafluoroethylene) has exceptional chemical, electronic, mechanical and thermal properties for a multitude of applications. It is resistant to nearly all chemicals and has a temperature service range from -196°C (-320°F) to 260°C (500°F). Perhaps the most useful characteristic of PTFE is that it can be filled with other materials to add desired properties. The most common fillers are glass fiber, carbon, bronze and graphite.
Glass Fiber
Fill percentages vary by weight between 5 and 40%. Within this range, wear properties are improved and there is also an increase in deformation strength. Adding glass, however, increases PTFE’s coefficient to friction and its resistance to alkalis and hydrofluoric acid.
Carbon
Fill percentages vary by weight between 10 to 35%. Carbon with graphite improves PTFE’s wear and deformation strength properties. Because of carbon’s conductive properties, it is suitable for applications that require higher thermal conductivity and becomes static dissipative due to its electrical conductivity. Modified electronic properties are the result of carbon/graphite fills.
Bronze
Fill percentages vary by weight between 40 to 60%. By adding bronze to virgin PTFE, maximum wear properties are attained. Bronze filled PTFE also offers greatly improved deformation strengths and good thermal conductivity, but results in poor electrical characteristics and chemical resistance.
Graphite
Fill percentages vary by weight between 5 to 15%. Graphite, most often used in conjunction with other PTFE fillers, lowers the coefficient of friction due to its self-lubricating properties. It also improves deformation strength and offers a slight improvement in wear properties.
Our Products
Explore Our Other Products
Custom-Molded Rubber
Buckeye furnishes custom molded rubber parts of every description, for a wide variety of applications, from a wide range of base polymers. We can produce special components to meet your particular requirement.
Hydraulic Lip Seals
Available in a variety of synthetic rubber formulations, from standard Nitrile to high-performance perfluoroelastomers, the choice of O-ring depends on the specific fluid, pressure, and temperature conditions of the application.
O-Rings & BackUp Rings
Available in a variety of synthetic rubber formulations, from standard Nitrile to high-performance perfluoroelastomers, the choice of O-ring depends on the specific fluid, pressure, and temperature conditions of the application.
Die-Cut Gaskets
Available in a variety of synthetic rubber formulations, from standard Nitrile to high-performance perfluoroelastomers, the choice of O-ring depends on the specific fluid, pressure, and temperature conditions of the application.
Custom-Molded Rubber
Custom-Molded Rubber
Buckeye furnishes custom molded rubber parts of every description, for a wide variety of applications, from a wide range of base polymers. We can produce special components to meet your particular requirement.
Hydraulic Lip Seals
Hydraulic Lip Seals
Available in a variety of synthetic rubber formulations, from standard Nitrile to high-performance perfluoroelastomers, the choice of O-ring depends on the specific fluid, pressure, and temperature conditions of the application.
O-Rings & BackUp Rings
O-Rings & BackUp Rings
Available in a variety of synthetic rubber formulations, from standard Nitrile to high-performance perfluoroelastomers, the choice of O-ring depends on the specific fluid, pressure, and temperature conditions of the application.
Die-Cut Gaskets
Die-Cut Gaskets
Available in a variety of synthetic rubber formulations, from standard Nitrile to high-performance perfluoroelastomers, the choice of O-ring depends on the specific fluid, pressure, and temperature conditions of the application.
