Fluoropolymers

General

This specific group of coatings produced by DuPont combines exceptional non-stick and low friction properties with excellent resistance to corrosion, even at high temperatures. We will recommend the best possible DuPont™ coating for you, depending on the proposed application.

Applications

DuPont™ coatings are used for a variety of purposes in the chemical, galvanic, semi-conductor, process and food industries.

Properties and Benefits

The most important properties and benefits of the different coatings are:

PTFE

PTFE is used in different compositions and colours and is applied in a layer thickness of 25 – 40 µm. Following the application of the wet PTFE coating, the coated item is cured in an oven, through which the coating obtains its final properties. PTFE is applied due to its excellent non-stick and low friction properties, at temperatures of up to 260°C. Because of the relative thinness with which the layer is applied, this coating cannot withstand heavy mechanical loads.

FEP

The FEP coating is a powder which is applied electrostatically in a layer thickness of 50 - 200 µm. The coating is applied for its very good to excellent non-stick and low friction properties, in combination with improved resistance to abrasion when compared to PTFE. The maximum in-use temperature is 205°C.

ETFE

These coatings are applied using the electrostatic powder spray process in a layer thickness of 400 – 1000 µm. This layer thickness makes the coatings absolutely porefree, which means they are very useful in aggressive environments. They are highly resistant to abrasion and can be used in combination with many aggressive chemicals. ETFE is also available in different compositions. The filled ETFE contains additives, making the coating resistant to vapour diffusion, which is the major cause of blisters under the coating.

PFA

The PFA coating is available in different compositions. The standard coating consists chiefly of pure PFA powder, which is applied using the electrostatic powder spray process in a layer thickness of 50 – 200 µm. The key difference between PFA and FEP is the maximum in-use temperature of 260°C for PFA. This PFA coating is also applied as a filled coating, known as Ruby Red, which offers the best protection from corrosion and a high resistance to vapour diffusion at high temperatures. We can advise you on the best possible coating for the application and temperature you have in mind.