Glossary

PTFE coating

Polytetrafluoroethylene (abbreviated PTFE, sometimes polytetrafluoroethylene or ethylene) is a fully fluorinated polymer. Colloquially PTFE coatings are often with the trade name Teflon ™ the DuPont company. Other frequently used trade names from other manufacturers are Dyneon PTFE (formerly Hostaflon) and Gore-Tex for PTFE membranes. The PTFE coating is applied after mechanical and / or chemical pretreatment and then a temperature treatment (sintering). A PTFE coating is used as Non-stick coating used in many technical applications. PTFE is very inert. Even aggressive acids cannot attack this coating. The reason is the particularly strong bond between the carbon and fluorine atoms. Many substances fail to break the bonds and react with PTFE. Due to its chemical inertness, PTFE is used as a coating, among other things, where aggressive chemicals occur. A PTFE coating has a very low coefficient of friction. PTFE slides on PTFE as well as wet ice slides on wet ice. In addition, the static friction of this coating is just as great as the sliding friction. A PTFE coating is difficult to wet. Due to its low friction, PTFE is used as a coating in the area Dry lubrication and as a coating for Bearings and seals used. The varied and relatively simple ways of compounding enable special mixtures for diverse applications.

Application examples for PTFE coatings 

Rhenotherm Kunststoffbeschichtung GmbH carries out contract coatings with PTFE (PTFE coating) and is certified as a contract coater according to DIN EN ISO 9001: 2015.

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