PTFE Gasket Material

PTFE Gasketing

PTFE gaskets cut from PTFE sheet

PTFE sheet gasket material comes in several forms.

The first thing that must be determined is what type of PTFE gasket material your looking for. The most common form is a virgin PTFE gasket material. Virgin PTFE is specified for medical or electrical applications. Most applications however are not medical or electrical and can easily be satisfied with mechanical grade PTFE.

Mechanical grade PTFE

Some applications call for thinner material. While PTFE gasket material is exceptional in it's range of temperature (to 500 F) and PH range (0-14) it has limitations on the thickness available. Most PTFE sheet is skived off of a roll. Some material is molded but this is generally limited to 24" x 24" or 12" x 12" sections.

PTFE Film is another product that has the same or similar properties but is made in very thin and produced in rolls. We offer PTFE Film in .001" to .025" thick. The next size above .025" we offer is .032" which we then term as sheet PTFE gasket material.

Expanded PTFE - EPTFE

Expanded PTFE Sheet

 

Gasket material is a soft and conformable material that is ideal for applications with limited bolt load torque available. Expanded PTFE (EPTFE) is ideal in applications such as glass lined pipe where excessive bolt load will cause more problems than it will solve. If you have never touched this exceptional sealing material think of a dense marshmallow. It has the same chemical resistance and temperature range as any PTFE but it is soft and will effect a seal much quicker than regular PTFE gasket material. Once considerd and great product but too expensive to use, expanded PTFE has come down in cost since the experation of W.L. Gores patent.

Premium Biaxial Oriented (HS10) PTFE

PTFE-Biaxial-Gylon-Equal

This is uniquely made PTFE based sheet that has two key characteristics. 1) The manufacturing process differs from the typical skiving method. The raw material is rolled flat like a dough and layered in alternating directions. (2) The PTFE is loaded with fillers. The most common three are Silica, Barium Sulfate and, glass sphears. Other materials such as carbon fiber, brass, copper or bronze have also been used.

At the time of this writing there are only 5 manufacturers in the world that produce Premium biaxial PTFE. Dupont developed the process and Garlock was the first to take it to the industrial market. Today we offer, FMI, Lamons, and Garlock brands.

Is PTFE the same as TEFLON®?

The answer is yes and no. If the PTFE is made of Chemours (formerly Dupont) resin, then yes it is Teflon ®. However, if the material is made of any other PTFE brand, it is not and cannot be called Teflon ®.

Teflon® is a registered trademark of DuPont and is used in relation to products manufactured with Dupont’s fluoropolymer resins.

What is PTFE?

PTFE is an abreviation for PolyTetraFluoroEthylene, which is the chemical term.

Polytetrafluoroethylene (PTFE), (Chemours trademark of Teflon®) is a thermoplastic member of the fluoropolymer family of plastics. PTFE has a low coefficient of friction, excellent insulating properties, and is chemically inert to most substances. It also can withstand high heat applications and it is well know for its anti-stick properties.

Other PTFE resin manufacturers include:

FLUON® AGC Chemicals Americas, Inc. (AGC). They have plants in the U.S., England, and Japan.
DYNEON® Dyneon, a 3M Company, produces PTFE resin in Gendorf, Germany. This plant has operated since 1964, founded by Hoechst AG and resin formerly trademarked as HOSTAFLON®.
POLYFLON® Daikin Industries Ltd. has been producing PTFE resin since the 1960's in Japan and since 1994 in the U.S as Daikin America Inc.
ALGOFLON® Solvay Solexis, formerly Ausimont, has plants in the U.S. and Italy. Ausimont was purchased by Solvay.

TEFLON® is a Registered Trademarks of Chemours

Consult American Seal & Packing for your specific PTFE Gasket Material application.

(714) 593-9780 today!