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 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.
Metallic winding and compatible ring components where service conditions are suitable.
| Polymer | Polytetrafluoroethylene |
|---|---|
| Repeat Unit | (C₂F₄)ₙ |
| Material Type | Fluoropolymer |
| Common / Applicable Specification | ASTM D4894 may apply to resin; gasket filler is manufacturer-specific |
| Typical Gasket Use | Metallic winding and compatible ring components where service conditions are suitable. |
PTFE Chemical Composition
Reference composition limits are shown below. Exact requirements should be confirmed against the applicable product specification and certified material documentation.
| Element / Constituent | Symbol | Composition / Information |
|---|---|---|
| Principal Chemistry | — | Carbon-fluorine polymer, repeat unit (C₂F₄)ₙ |
| Fillers / Pigments | — | Grade-dependent; virgin PTFE contains no reinforcing filler |
| Metallic Elements | — | Not intrinsic to virgin PTFE |
PTFE Mechanical Properties
PTFE mechanical properties vary strongly with resin grade, processing, orientation and test method. Typical ranges are shown only as reference.
| Property | Reference Value | Unit / Basis |
|---|---|---|
| Tensile Strength | Typical ≈20–35 | MPa |
| Elongation at Break | Typical ≈200–400 | % |
| Hardness | Typical ≈50–65 | Shore D |
Values shown are engineering reference data, not universal design allowables. Final procurement and design must use the governing specification, exact product form/condition and certified material test documentation.
PTFE Physical & Service Information
Reference physical properties and service considerations relevant to material selection for Spiral Wound Gaskets.
| Density | Approx. 2.1–2.3 g/cm³ |
|---|---|
| Continuous Service Temperature | Commonly up to about 260°C, subject to pressure and gasket design |
| Chemical Resistance | Excellent against most industrial chemicals. |
| Creep Behaviour | PTFE is viscoelastic and can creep under sustained load; gasket design must account for this. |
| Service Selection | Do not treat generic PTFE properties as certified values for a specific filler tape. |
Specify PTFE for your gasket
Share your gasket dimensions, service conditions and quantity for PTFE material options and pricing.