PTFE
PTFE is a chemically inert fluoropolymer widely used as a Spiral Wound Gasket filler for aggressive chemical service where broad chemical resistance and low contamination are important.
PTFE Grade Information
PTFE is a chemically inert fluoropolymer widely used as a Spiral Wound Gasket filler for aggressive chemical service where broad chemical resistance and low contamination are important.
Material specification for virgin, unfilled PTFE sheet. Confirm that the ordered filler stock has this product form and resin type.
| Material specification | AMS 3667 |
|---|---|
| Material identification | Polymer — UNS not applicable |
| Product / supply condition | Compression molded and sintered. |
PTFE Chemical Composition
Polymer identity and resin classification, not metallic elemental composition.
| Element / description | Material description |
|---|---|
| Material | Polytetrafluoroethylene |
| Qualification | Virgin / unfilled for AMS 3667; check the required resin designation for IS 14635. |
PTFE Mechanical Properties
Published reference values for the stated form and condition. Typical values are not specification acceptance limits.
Mechanical requirements depend on resin type, processing route, product thickness and specimen preparation. Specify the actual PTFE product and apply the tests in the ordered specification.
Manufacturer reference data is shown for comparison. Use the selected AMS 3667 edition and certified material test results for acceptance. Confirm specimen direction, gauge length, thickness and heat treatment.
AMS 3667 Grade Reference
Polymer — UNS not applicable
| Material specification | AMS 3667 |
|---|---|
| Source edition | AMS3667E (stabilized 25 August 2011) |
| Publication status | Stabilized publisher edition |
| Product / supply condition | Compression molded and sintered. |
| Specification information | Molded sheet is the verified scope. Do not use this entry to certify skived tape, expanded PTFE, filled PTFE or modified PTFE without reviewing the actual material and applicable specification. |
| Comparison tables | View the AMS 3667 comparison tables |
| Material overview | View PTFE in Materials |
| Publisher reference | AMS 3667 publisher reference |
| Source reference | SAE — AMS3667E virgin, unfilled molded PTFE sheet, stabilized 2011 |
| Source reference | BSI — BS 6564-2:1991 fabricated unfilled PTFE products, withdrawn 1998 |
| Source reference | BIS — IS 14635 (Part 1):2025 fluoropolymer designation system, current publisher record |
| Source reference | BIS — IS 14635 (Part 1):2020 product manual (historical PTFE scope, not the 2025 acceptance tables) |
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