PTFE - PFA - Armylor®

Mersen masters all PTFE manufacturing processes:

• paste extrusion process for pipe lining,
• isostatic molding for PTFE pieces,
• PFA transfer molding.

Our PTFE & PFA lined products show several advantages:

• High resistance to thermal shocks
• PTFE/ PFA linings are seamless
• Possibility for custom made pieces (complex geometry)
• Easy installation, no gasket required
• Low natural permeability rate

Since the 1960s, Mersen has been proficient in all the PTFE manufacturing processes, such as paste extrusion, isostatic molding and PFA transfer molding.

The use of polytetrafluoroethylene powder (PTFE) developed by Dupont de Nemours under the Teflon® brand was studied by Mersen because this powder has exceptional properties, chief among which its resistance to corrosion and high temperatures.

It is no easy task to use certain types of this powder–particularly those useful for our applications. Paste extrusion, the technology developed, is fairly similar to that used to manufacture carbon. It involves mixing powder with a binder, “baling” it, followed by cold extrusion and thermal treatment. Over time, as the type of powder being used evolved, other technologies were developed, including the injection of complex parts.

The tubes produced are then fitted into the boilermaking equipment and plated against it. “Inflation” techniques are also used to produce various shapes and connections. In any event, all Armylor® components form a “Meccano”-like structure, which does not require any joints to be assembled.

Given the diversity of Armylor® standards, a whole catalogue of products meeting the needs of the corrosive industry markets will be available.