Modified PTFE or TFM, is a high-density copolymerized material. It has low gas permeation and reduces cold flow. Often used in the medical field as an artificial blood vessel graft and in other applications where biocompatibility is required. TFM is also FDA and USP class VI suitable.
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EXPERIENCE & CAPABILITY
TFM remains a largely unfamiliar material in the general PTFE machine parts and seal markets. At AFT, we have pioneered the use of Dyneon TFM in both its virgin and compounded forms due to the exceptional physical properties it offers.
AFT has converted hundreds of traditional PTFE customers to a TFM-based solution offering huge performance improvements, service life and less downtime.
MANUFACTURING EXPERTS IN TFM
WE CAN OFFER Modified PTFE (TFM) IN BOTH VIRGIN AND COMPOUNDED FORMS
TFM PROPERTIES
Modified PTFE offers many advantages over PTFE. Lower deformation under load, better fatigue performance, easier to weld, better transparency, higher elongation and higher dielectric strength. Modified PTFE, like PTFE, has excellent chemical resistance and a very low coefficient of friction.
Less creep than PTFE
Lower deformation under load
Lower permeability
Increased chemical permeation resistance
Excellent hermal stability
Cold flow resistance
Higher cost than PTFE
TYPICAL PHYSICAL PROPERTIES OF TFM
| Property | Test Method | Value |
|---|---|---|
| Specific Gravity | ASTM D 4894 | 2.19 g/cm3 |
| Tensile Strength | ASTM D 4894 | 31 MPa (4600 PSI) |
| Elongation at Break | ASTM D 4894 | 450% |
| Shore D Hardness | BS EN 13000-2 | 60 |
| Dielectric Strength | IEC 60243-1 Film 100µm | 105 |
TFM APPLICATIONS
If an application requires a temperature or chemical resistance sealant that alternatives cannot meet, then a fluoropolymer based solution is the best option. Such applications can be found across many different markets, from aerospace, to oil and gas to semiconductors and beyond.
SealsAs TFM Modified PTFE offers the same excellent chemical resistance and thermal stability as Standard PTFE, whilst delivering improved weldability, lower deformation under load and lower permeability, it is often used in sealing solutions.
Component Design & ManufacturingWe can design and manufacture your product, part or component in Modified PTFE (TFM). Whether developing a new part from scratch or innovating to provide a new solution for a failing component, our engineers can design and manufacture products in Modified PTFE (TFM) that will meet and exceed performance requirements.
SOLUTIONS ACROSS A RANGE OF INDUSTRIES
case study
Hydrogen Engines and PTFE
We recently had the opportunity to work with Brunel University, creating PTFE corner seals used in a Wankel Hydrogen engine.
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