Teflon (PTFE)

PTFE is characterised by the following remarkable properties:

• Non-stick properties: Teflon is extremely smooth, so that virtually no substances stick to its surface.

• Chemical resistance: it is resistant to almost all chemicals, including acids, bases and solvents.

• Thermal stability: it remains functional at temperatures from -200 °C to +260 °C.

• Low friction: the coefficient of friction of PTFE is extremely low, making it ideal for applications with minimal wear.

• Electrical insulation: outstanding dielectric properties make it an excellent insulator.

• Water-repellent: PTFE is hydrophobic and prevents moisture absorption.

• Biocompatibility: suitable for medical applications and food contact.

PTFE is produced by polymerisation of tetrafluoroethylene (TFE). The manufacturing process comprises:

• Polymerisation: TFE is polymerised under pressure in the presence of an initiator.

• Shaping: the PTFE powder is shaped by pressing or extrusion.

• Sintering: the shaped material is heated to obtain a solid structure.

There are different forms of PTFE, used depending on the application:

Type	Properties	Typical applications
Virgin PTFE	Highest chemical resistance, thermally stable	Seals, insulators, non-stick coatings
Filled PTFE	Mechanical properties reinforced by fillers such as glass or carbon	Bearings, slide plates, seals
Expanded PTFE (ePTFE)	High flexibility, porous structure	Membranes, filtration systems

Thanks to its exceptional properties, PTFE is used in many industries:

Kitchenware and household goods

• Non-stick coatings: in cookware such as pans and baking tins.

• Water-repellent coatings: for textiles and outdoor equipment.

Industry and mechanical engineering

• Seals and valves: resistant to extreme temperatures and chemicals.

• Plain bearings: reduce friction and wear.

Electrical and electronics industry

• Cable insulation: high dielectric strength for high-voltage applications.

• Protective layers: to protect sensitive electronics from moisture and chemicals.

Medical technology

• Implants: biocompatible and chemically inert.

• Catheters: lubricious, sterile surfaces.

Chemical industry

• Pipes and containers: resistant to corrosive chemicals.

• Membranes: for filtration and separation processes.

Teflon offers numerous advantages that make it an indispensable material:

• Longevity: resistant to wear, ageing and chemical degradation.

• Safe to use: non-toxic and food-safe.

• Wide range of uses: suitable for numerous industrial and domestic applications.

• Low maintenance: non-stick and dirt-repellent properties make cleaning and care easier.

Despite its exceptional properties, Teflon brings some challenges:

• High cost: PTFE is more expensive than many other plastics.

• Difficult processing: the high melting temperature and low coefficient of friction make processing more difficult.

• Sensitivity to cold flow: the material can deform under constant load.

• Is Teflon harmful to health? Teflon is non-toxic when used properly. However, non-stick coatings should not be overheated, as toxic gases can form at very high temperatures.

• Can Teflon be recycled? Recycling PTFE is difficult and is carried out only to a limited extent. Research into improving recyclability is ongoing.

• How should Teflon-coated products be cared for? Avoid abrasive cleaning agents and use soft sponges to protect the coating.

• What temperatures can Teflon withstand? Teflon remains stable between -200 °C and +260 °C.

Teflon (PTFE) is a versatile plastic that is indispensable in numerous applications thanks to its unique properties. Whether in the domestic kitchen, mechanical engineering or medical technology, Teflon impresses with its non-stick, chemically resistant and thermal properties. Despite some challenges, it remains a central material in modern industry.