PVDF (Kynar) vs PTFE (Teflon): Both fluoropolymers — PVDF is processable and stronger, PTFE more chemically inert
PVDF (Kynar) vs PTFE (Teflon)
Side-by-side chemical composition and mechanical property comparison.
Overview
PVDF (Kynar)
Polyvinylidene Fluoride — the melt-processable fluoropolymer. Bridges the gap between PTFE (non-melt-processable) and conventional plastics. Excellent chemical resistance to acids, solvents, and hydrocarbons. Uniquely piezoelectric among polymers. Much stronger than PTFE (UTS 50 vs 25 MPa). Trade names include Kynar (Arkema), Solef/Hylar (Solvay), KF (Kureha). Used for chemical piping/valves/tanks, lithium-ion battery binder, semiconductor wet bench, architectural coatings (Kynar 500), and piezoelectric sensors.
PTFE (Teflon)
Polytetrafluoroethylene — the most chemically resistant polymer. Lowest friction coefficient of any solid material (~0.05-0.10). Service range -240°C to +260°C continuous. Cannot be melt-processed — must be sintered from powder (like ceramics). Very low mechanical strength. Trade name Teflon (Chemours/DuPont). Used for seals, gaskets, bearings, non-stick coatings, chemical reactor linings, electrical insulation, and lab equipment.
| PVDF (Kynar) | PTFE (Teflon) | |
|---|---|---|
| Material Number | — | — |
| Category | Polymers | Polymers |
| Standard | ISO 10350 | ISO 12086 |
Mechanical properties
| Property | PVDF (Kynar) | PTFE (Teflon) | Unit |
|---|---|---|---|
| tensile_strength | 35–55 | 20–35 | MPa |
| yield_strength | 35–50 | — | MPa |
| elongation | 20–300 | 200–400 | % |
Compatibility Assessment
PVDF is melt-processable (injection moldable!) while PTFE must be sintered. PVDF has 2x higher UTS (50 vs 25 MPa) and 4x higher modulus. PTFE has wider chemical resistance, lower friction, and higher use temp (260 vs 150°C). Choose PVDF for piping/tanks/structural; PTFE for seals/bearings/coatings.
Frequently Asked Questions
Is PVDF (Kynar) the same as PTFE (Teflon)?
PVDF (Kynar) and PTFE (Teflon) have a 45% composition overlap. Both fluoropolymers — PVDF is processable and stronger, PTFE more chemically inert
Can I replace PVDF (Kynar) with PTFE (Teflon)?
Generally not recommended. The compositions differ significantly (45% overlap). These materials have different alloying concepts and are intended for different applications.
What is the difference between PVDF (Kynar) and PTFE (Teflon)?
The main differences are in the following elements: overall alloying content. PVDF (Kynar) is a Polymers grade, while PTFE (Teflon) is a Polymers grade.
Related Comparisons
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Data provided for reference only. Always verify against the applicable specification for critical applications.
All data is for reference only. Equivalents indicate similarity, not identity. Always verify against the applicable specification for safety-critical applications. materialref.com accepts no liability for decisions based on this data.