Teflons are made of a fluoride plastic which is highly resistant to chemical substances as well as having an outstanding thermal stability at high temperature and a low friction coefficient. Note that Teflon® is also the product trademark and that of the manufacturer who invented it: Dupont™ Teflon®.
PFA is a copolymer that is often used for cable protection in aerospace applications as well as for flexible tubing and devices that require a high chemical resistance. It is used for extrusion and for transfer moulding as well as moulded elements manufacturing, special tubings and in equipment coating for chemical engineering. It is generally used for applications demanding greater thermal and chemical requirements than those of the FEP.
Approved by the FDA, PFA is a high quality resin. It is known for its outstanding mechanical properties such as high temperature resistance and a low coefficient of friction. It has very good resistance to stress cracking, is very flexible and provides protection against aggressive chemicals. It can easily be used in injection moulding and extrusion processing. PFA retains and maintains its properties as low as - 139 °F and up to + 464 °F.
Teflons can be chemically treated to allow for engraving or can have additives such as glass, glass fiber (fiberglass), graphite, bronze and many others. Available Teflon® grades are PTFE, FEP, MFA, PFA, PVDF, ETFE, ECTFE, PCTFE and PVF.
Please, note that for PVDF tubes and rolls shapes must be specially ordered.
Teflon® is sold in standard, non standard and customized dimensions. The heat deflecting coating available on PTFE has different ratios such as 4: 1 and 2: 1 while the FEP ratio is 1.6: 1 and 1.3: 2
