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.
Indian designation system for fluoropolymer dispersions and moulding / extrusion materials, including PTFE-related raw-material classifications.
| Material specification | IS 14635 (Part 1) |
|---|---|
| Material identification | Polymer — UNS not applicable |
| Product / supply condition | Specify resin type, processing route and the full material designation. |
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 IS 14635 (Part 1) edition and certified material test results for acceptance. Confirm specimen direction, gauge length, thickness and heat treatment.
IS 14635 (Part 1) Grade Reference
Polymer — UNS not applicable
| Material specification | IS 14635 (Part 1) |
|---|---|
| Source edition | IS 14635 (Part 1):2025 |
| Product / supply condition | Specify resin type, processing route and the full material designation. |
| Specification information | The 2025 publisher record supersedes the 2020 edition. This is a resin designation route, not a finished spiral-wound gasket specification. The historical product manual supports the PTFE connection but does not verify the revised 2025 property tables. |
| Comparison tables | View the IS 14635 (Part 1) comparison tables |
| Material overview | View PTFE in Materials |
| 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) |
| Source reference | SAE — AMS3667E virgin, unfilled molded PTFE sheet, stabilized 2011 |
| Source reference | BSI — BS 6564-2:1991 fabricated unfilled PTFE products, withdrawn 1998 |
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