FEP film is used for many purposes. Do you have any idea what the reason is that FEP foil is used so much? This has to do with the unique properties of FEP foil and the advantages that flow from it:
FEP is the melt processable version of PTFE and can be extruded and vacuum formed. FEP has the same chemical resistance and non-stick properties as PTFE. Some of these properties are:
One of the properties of FEP foil is, for example, that it can be manufactured very thin. The
thinnest variant of FEP foil is only 13 microns thick. To clarify: 1 micron is 1000 times as thin
as 1 millimetre. The thinnest variant is therefore extremely thin.
PTFE vs FEP
Even though FEP and PTFE are in the same family of materials there are also quite some differences. If you wish to read more about it I can recommend the following article on FEP vs PTFE