Differences between PTFE (Teflon), FEP, and PFA

September 11, 2009

The name, “Teflon” is Dupont’s trademark name for its family of fluoropolymers.  At times, it is mistaken that DuPont’s trademark name is meant only to refer to the fluoropolymer, PTFE, when FEP and PFA also can be used under the appellation.

Industry experts also use other names to refer to the fluoropolymers.  FEP, PFA, and PTFE are also known under names such as THV, PVDF, ETFE, ECTFE, and CTFE.

Though all of the fluoropolymers can be cataloged in the same family, they vary slightly in regards to thermal and mechanical properties.

PTFE and PFA have a raised temperature tolerance in comparison to FEP.

FEP and PFA are clear, yet PTFE is translucent.  FEP and PFA have better mechanical properties in comparision to PTFE.

The main differences are in regards to chemical inertness, corrosion resistance ,permeability, and FDA approval.

For more information, visit our Overview of Fluoropolymers
and Typical properties of fluoropolymers.


Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )


Connecting to %s