1. Definition:

1.1 PTFE:
PTFE (Polytetrafluoroehylene) is a synthetic fluopolymer of tetrafluoroethylene,  commonly referred as fluorine resin (Fluorocarbon Resin). The best known brand name of PTFE is Teflon by Dupont Co. It is a characterized by chemical resistance, such as acid resistance, corrosion resistance, and organic solvent resistance. It does not change its property whether in high temperature or low temperature, and its low coefficient of friction can be used as lubrication. It is used as a non-stick coating for pans, cookware, expansion joint, industrial fabric textile, etc.

1.2 PTFE Coated Expansion Joint:
PTFE can be used as coating in expansion joint for material metal, rubber, and fabric. It is provided with chemical resistance and temperature resistance, and can absorb vibration and allows thermal movement and misalignment in piping systems.

1.3 PTFE Expansion Joint:
A PTFE expansion joint, comprises lined pipe and fitting, is used as flexible connector and tremor barriers in duct systems, and designed to compensate for misalignments, absorb expansion and contraction, and isolate vibration and shock in process piping. It is a characterized by universal chemical inertness, high and low temperature resistance, invulnerability to ozone and sunlight, and long life in use.

2. Advantages of PTFE:

The fluoroplastic component of the flexible element provides:
2.1 a gas seal layer with minimal to zero porosity.
2.2 mechanical strength and resistance to flex failures.
2.3 resistance to attack from most chemicals.

3. Trademark of PTFE:

3.1 Algoflon & Hyflon are registered trademarks of Solvay Solexis, Inc.
3.2 Dyneon is a registered trademark of Dyneon LLC, A 3M Company.
3.3 Polyflon & Neoflon are registered trademarks of Daikin Industries, Ltd.
3.4 Teflon is a registered trademark of DuPont.