PTFE
PTFE is one of the most widely used fluoropolymer for an array of applications. Its amazing properties allow us to use PTFE machined parts for a wide variety of applications. Vanéflon has over 40 years of experience in PTFE machining which makes us the ultimate partner for all your industrial PTFE needs.
What is PTFE?
PTFE (polytetrafluoroethylene) is a thermoplastic polymer with a density of about 2.160 kg/m³. It gains its properties from the aggregate effect of carbon-fluorine bonds, as do all fluorocarbons. The fundamental difference is that this material is not melt-processable while all other fluoropolymers are. Standard PTFE is not suitable for injection moulding, blow moulding or vacuum forming.
PTFE has one of the lowest coefficient of friction of any known solid material. That makes it an excellent choice in applications that require anti-stick properties or that are sensitive to wear. But that is not the only trick up its sleeve. Parts machined in PTFE show a high resistance to temperature, chemicals and even radiance. They also exhibit a high impact strength.
Thanks to its excellent chemical and physical properties, PTFE is widely found in the semiconductor, pharmaceutical, automotive and chemical sector. For accurate dimensions, this material requires special attention during machining. For instance, special holding mechanisms are necessary to account for the softness of the material. Especially where no high mechanical strength is required and where the use of compounds is not allowed. A vast variety of compounds is available on the market: filters such as glass fibre, carbon, graphite, bronze, stainless steel, mica are being used to improve the original properties.
Pure PTFE hat has a wide range of applications. Typical applications include PTFE coatings for heat exchangers, electrical insulation, O-rings, seals and gaskets, seats and bearings, non-stick surfaces, linings for fuel hoses…
Relevant links
PTFE key properties
- Chemical inertness
- High temperature resistance
- Super high melt viscosity
- Hydrophobic
- Excellent dielectric properties
- Electrical isolating properties
- Fire resistant
- Chemical/thermal resistant
- FDA approved
PTFE uses
- Wiring in aerospace and computer applications
- Petrochemical and chemical processing
- Electrical applications: best insulators known
- Semi-conductor industry
- Food, beverage and pharmaceutical industries
- Laboratory applications: piping, tubing and vessels
- Custom moulded and machined parts
PTFE + 15% GLASS OR PTFE + 25% GLASS
Glassfilling slightly increases PTFE’s very low coefficient of friction, but considerably increases wear and pressure resistance. The best results are obtained by using Dyneon TFM® as basic material. Used as construction material for bearing pads, ball seals …
PTFE + 17% GLASS + 3% MOS2
Shows the same pressure resistance as glassfilled PTFE, but uses MoS2 as a lubricant. Molybdenum also increases hardness and decreases wear.
PTFE + CARBON/GRAPHITE 22/3
Carbon is one of the best fillers for chemical use. It features high heat conductibility and high wear and pressure resistance. Recommended for piston rings and other dynamic seals.
CARBON FIBER
Same as carbon/graphite, but with improved stiffness, reduced creep and reduced thermal expansion. Used for valve seats, bearings … Allowed for steam applications.
PTFE + 15% GRAPHITE
A compound with excellent thermal and electrical conductivity. For anti-static linings and bearings.
PTFE VFG - VX1 - MAROON
The high concentration of glass fibers, combined with the addition of inert metallic oxides make this compound your best choice, where pressure and wear resistance are of major importance. Used for seals that require very low cold-flow abilities.
STAINLESS STEEL
High compression resistance, only for low PV values. Used for seats in steam valves.
SUMICASUPER 10% EKONOL
Exceptional filler component to improve the mechanical properties without increasing the porosity. Used for lip seals, back-up rings …
PTFE + 60% BRONZE
This compound combines a low coefficient of friction with a high pressure resistance. Both these properties make this a bearing material par excellence.
P84 - POLYIMID
Exceptional filler component to improve PV values. Used for lip seals, rotary shaft seals …
