PTFE Gasket & Sheets

WS 7110 | WS 7115 | WS 7221

Description

PTFE Gasket-IDT sheets are made from high quality 3M^TM Dyneon^TM TFM^TM. The basic characteristics of PTFE [polytetra¬fluoroethylene] are based on the special molecular structure of the fluorine and carbon atoms; both chains have an extremely strong bond. The carbon network is hermetically sealed by the fluorine atoms which makes a chemical attack extremely hard and the PTFE therefore becomes resistant to chemicals and solid.

The pharmaceutical-chemical industry requires low per¬meation for sealing applications, high chemical resistance, solid mechanical resilience and easier processability. Only few materials, mostly on fluoropolymer basis, combine these advantages. TFMTM, a PTFE of the second generation, has proven itself. TFM^TM distinguishes itself from classic PTFE by the additionally applied modifier. The particles melt more easily into a dense, low pore poly mer structure due to the achieved, more homogeneous crystalline structure; as a result the tightness is significantly improved. A further disadvantage of classic first generation PTFE is that it flows under load [cold flow] and resulting in a loss of surface pressure in clamped condition. This negative characteristic has been significantly improved with the development and gasket technology application of TFM^TM and the cold flow behaviour has been optimised. An additional modification can be achieved in a finishing process by mixing in filler or aggregates. During recent years, the use of the modified compound TFM^TM 4105 with 25% glass fiber content has stood the test in the gasket technology practice. Semi-finished products and sheets as the source material for non-metallic PTFE gaskets are produced in a press-sinter process.

Properties

Applications

Product Range

Gaskets made from above mentioned materials are also avail­able with inner eyelets and/or outer eyelets.

Additionally: IDT Profile Overview | FD Series

Additional Designs