Polytetrafluoroethylene (PTFE) is a synthetic fluoropolymer of tetrafluoroethylene, and has numerous applications because it is chemically inert.In 1938, a DuPont chemist named Roy J. Plunkett accidentally discovered Teflon while attempting to make a new chlorofluorocarbon refrigerant. DuPont patented the new fluorinated plastic and registered the Teflon trademark in 1945.
Applications and uses
Wire insulation, electronics：
The major application of PTFE, consuming about 50% of production.
Bearings seals:
In industrial applications, owing to its low friction, PTFE is used for plain bearings, gears, slide plates, seals, gaskets, bushings,and more applications with sliding action of parts.
Chemically inert liners:
PTFE is often used as the liner in hose assemblies, expansion joints, and in industrial pipe lines.
Kitchen ware:
PTFE is best known for its use in coating non-stick frying pans and other cookware, as it is hydrophobic and possesses fairly high heat resistance.
PTFE IS WIDELY USED FOR:
- Seals and gaskets
- Valve and fitting components
- Pump parts
- Manifolds
- Semiconductor equipment
- Scientific equipment
- Chemical resistant tubing
- Bearings and bushings (bearing grades)
Teflon or fluoropolymer coatings generally come in either black or grey. However, custom PTFE coating colours are also available on request.PTFE – Colors (all) Sheets, Rods, Tubes in Black, Blue, Red, Purple, Green & Other Colors.
PTFE is a polymer synthesized by polymerizing tetrafluoroethylene as a monomer, with the chemical formula(C2F4)n.
Mechanical Properties
| Property | Value |
| Melting Temperature (°C) | 317-337 |
| Tensile Modulus (MPa) | 550 |
| Elongation at Break (%) | 300-550 |
| Dielectric strength (kV/mm) | 19.7 |
| Dielectric Constant | 2.0 |
| Dynamic Co-efficient of Friction | 0.04 |
| Surface Energy (Dynes/g) | 18 |
| Appl. Temperature (°C) | 260 |
| Refractive Index | 1.35 |
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