A modified second-generation PTFE from Dyneon (Burgkirchen / Germany), a subsidiary of US technology group 3M (Saint Paul, Minnesota; www.3m.com), offers improved performance with greater safety and cost benefits, according to the company.

The fluoropolymer, which has a high resistance to temperature and chemical attack, has a molecular weight that is around five times lower than that of classic PTFE. This reduces the viscosity of the polymer melt, meaning the TFM particles attach more easily to form a dense, low void-containing structure, improving the product’s ability to be welded, among others.

In addition, TFM modified PTFE exhibits comparatively low flow behaviour at high temperatures, which is highly important, for example, for components that are mounted under pretension.

The fluoroplastic, said Dyneon, has proven itself in recent years as a lining and sealing material in plant engineering and construction apparatus, protecting pipes, tanks and vessels against corrosion. It has better sealing properties than PTFE in relation to volatile chemicals, resulting in a reduced environmental impact. At the same time, a longer life and a lower cleaning requirement lead to shorter plant downtimes and, therefore, improved profitability.

Dyneon said TFM modified PTFE opens up a wide range of new applications in various industries. These include insulation for electrical/electronic products, tailor-made solutions for the chemical industry and optimised solutions for mechanical engineering and the semi-conductor and automotive industries.