Expanded PTFE (Teflon®) gasket material is produced by expanding Virgin PTFE using a process that creates a uniform and highly fibrillated microstructure with equal tensile strength in all directions.
This means that expanded Teflon® possesses no structural weakness or a "grain". Since no additives are required, expanded Teflon® also possesses the unique chemical resistance of Virgin Teflon®. Expanded PTFE is much softer and more flexible than regular PTFE gaskets and thus conforms easily to irregular and rough surfaces. The material is easier to compress and minimizes creep and cold flow.
Expanded PTFE gaskets are made of synthetic fluoropolymer of tetrafluoroethylene consisting completely of carbon and fluorine. It is innately hydrophobic (repelling water and water-containing substances) and has one of the lowest coefficients of friction against any solid.
Expanded PTFE has excellent dielectric properties and provides excellent thermal insulation with an operating temperature range of -200°C to 260°C. PTFE is the most chemically resistant plastic known and is unaffected by most corrosive liquids, vapors, and gases Expanded PTFE gasket provides outstanding chemical resistance for duties where hygiene and non-contamination are essential.
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