Modified PTFE
Modified PTFE uses controlled polymer modification and/or fillers to reduce creep and improve dimensional stability compared with conventional PTFE while retaining broad chemical resistance.
Modified PTFE Information
Modified PTFE uses controlled polymer modification and/or fillers to reduce creep and improve dimensional stability compared with conventional PTFE while retaining broad chemical resistance.
Metallic winding and compatible ring components where service conditions are suitable.
| Base Polymer | PTFE |
|---|---|
| Material Type | Modified / filled PTFE formulation |
| Exact Formulation | Manufacturer-specific |
| Common / Applicable Specification | Manufacturer/product specification required |
| Typical Gasket Use | Metallic winding and compatible ring components where service conditions are suitable. |
Modified 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 |
|---|---|---|
| Base Chemistry | — | PTFE fluoropolymer |
| Modifiers / Fillers | — | Formulation-dependent; may include inorganic fillers or modified polymer architecture |
| Exact Composition | — | Proprietary / product-specific |
Modified PTFE Mechanical Properties
Reference room-temperature properties are shown for a commonly supplied condition. Exact requirements depend on product form, size, heat treatment and governing specification.
| Property | Reference Value | Unit / Basis |
|---|---|---|
| Tensile Strength | Product-specific | MPa |
| Elongation | Product-specific | % |
| Compressibility / Creep | Improved versus conventional PTFE in many formulations | — |
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.
Modified PTFE Physical & Service Information
Reference physical properties and service considerations relevant to material selection for Spiral Wound Gaskets.
| Density | Typically higher or similar to PTFE depending filler system |
|---|---|
| Service Temperature | Commonly limited to the PTFE temperature regime; verify manufacturer rating |
| Chemical Resistance | Generally excellent, but fillers can affect compatibility. |
| Creep Resistance | A primary reason for selecting modified PTFE. |
| Service Selection | Use the actual filler manufacturer's datasheet rather than generic PTFE values. |
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