PTFE SHEET (TEFLON SHEET)
Thickness :- 1.5MM TO 100.0MM
Size :- 300MM X 300MM, 600MM X 600MM, 1 MTR X 1 MTR
What it’s used for :
- Owing to its low friction, PTFE sheet is used for applications where sliding action of parts is needed such as plain bearings, slide plates, etc. In these applications, it performs significantly better than nylon and acetal and it is comparable to UHMWPE, although not as resistant to wear. It’s extremely high bulk resistivity makes it an ideal material for fabricating long-life electrets, which are useful devices being the electrostatic analogues of magnets. In optical radiometry, sheets made from PTFE are used for measuring heads in spectroradiometers and broadband radiometers (e.g., luminance meters and UV radiometers) due to its capability to diffuse a transmitting light nearly perfectly. PTFE sheets have high corrosion resistance and used in laboratory environments as containers for materials such as fluoroantimonic acid.
How it performs :
- Components made with PTFE sheets have an exceptional resistance to high as well as low temperatures, chemical reaction, corrosion, and stress-cracking. The electrical and low-friction properties of PTFE make it a preferred material for a number of applications and for different processing techniques.
Machining characteristics :
- PTFE sheet is quite a soft engineering plastic and may be difficult to hold without damaging or crushing. Also because of its inherent low friction and resulting “slipperiness”, PTFE sheet can also make it difficult to work with and hold in place again while being machined. Another consideration is its tendency to produce strings of long swarf, which may wrap around any cutters or tooling.
Gluing and bonding :
- Here again, the touted low friction and “slipperiness” of PTFE becomes a challenge. PTFE sheet must undergo surface preparation prior to bonding, normally by etching, using a solution of sodium and naphthalene in tetrahydrofuran. Adhesive manufacturers have developed proprietary primers which make it possible for the surface to be primed ready to accept an adhesive. Once the surface of the material is prepared, a number of adhesives can then be used including, epoxies, polyurethanes and acrylics. Companies such as Loctite® and 3M® have now developed a special acrylic based adhesive that can bond directly to PTFE without the need for preparation other than a preliminary wipe with a cleaning solvent.
Food applications suitability :
- As we all are aware of PTFE is DuPont’s Teflon® lining for cookware which is famous worldwide.
PTFE Sheet has some unique characteristics :
- PTFE is so slippery that it is known as the only known material that an animal called a gecko cannot stick!
Size range, colours, and availability :
What is PTFE otherwise known as? :
- It is sometimes referred to as Teflon ® (DuPont)
Why should you choose PTFE Sheet :
- PTFE sheet offers super low friction, high chemical resistance, low and high temperature capability, resistance to weathering, electrical and thermal insulation, and unrivalled "slipperiness"
Summary :
- PTFE is the most chemically resistant plastic yet known. Very few chemicals will react with it. Its mechanical strength properties are low compared to other engineering plastics such as nylon, but its properties do remain over a great temperature range. Its working temperatures are exceptional at -240 to +260°C. PTFE has outstanding thermal and electrical insulation properties. And, it is famous for its very low coefficient of friction. It is very difficult to make anything stick to PTFE without specific preparation.
