PFA Polymer: Properties, Uses & Cost Guide
Tensile data verified against MatWeb.com database & manufacturer datasheets · Last updated July 2026
Published: 2026-05-29
Perfluoroalkoxy (PFA) is a fully fluorinated melt-processable fluoropolymer that combines PTFE's near-universal chemical resistance and high-temperature capability (260°C continuous) with the critical advantage of conventional thermoplastic...
Perfluoroalkoxy (PFA) is a fully fluorinated melt-processable fluoropolymer that combines PTFE's near-universal chemical resistance and high-temperature capability (260°C continuous) with the critical advantage of conventional thermoplastic processability—it can be injection molded, extruded, and thermoformed using standard melt-processing techniques. This distinguishes it from PTFE, which cannot be melt-processed and must be compression-molded and sintered. PFA achieves melt processability through the incorporation of a perfluoroalkoxy side group (-O-CF₂-CF₂- or -O-CF(CF₃)-CF₂-) that disrupts the PTFE crystal lattice just enough to allow melt flow at 370-400°C while preserving the fully fluorinated chemistry responsible for chemical inertness.
PFA is the material of choice for semiconductor wet-process components (wafer carriers, diptubes, fittings, valve bodies for ultrapure water and aggressive chemical delivery systems) where PTFE's lack of melt processability limits design complexity and PTFE's microparticle shedding (from machining) is unacceptable. PFA can be injection molded into complex, smooth-surfaced geometries that minimize particle entrapment—a critical requirement for sub-10nm semiconductor manufacturing where sub-ppb metal contamination is the specification. PFA tubing and fittings are the standard for high-purity chemical distribution in semiconductor fabs, pharmaceutical WFI (Water For Injection) loops, and analytical laboratory fluid handling.
Recommended Applications
PFA Perfluoroalkoxy is commonly specified for:
⚠ Not Recommended For
PFA Perfluoroalkoxy is not recommended for:
- Cost-sensitive applications where FEP or PTFE suffices (PFA is 1.5-2× the cost of FEP)
- Heavy abrasion environments (PFA has poor wear resistance; use PTFE-filled PEEK instead)
- High-pressure sealing without backup rings (PFA creeps under sustained load like all fluoropolymers)
Selection & Application Guide
PFA (perfluoroalkoxy) is the premium melt-processable fluoropolymer, combining PTFE-level chemical resistance and 260°C temperature capability with injection moldability. Choose PFA over PTFE when complex part geometries require injection molding; over FEP when service temperature above 200°C is needed; over PEEK when chemical purity is paramount and mechanical loads are moderate. PFA's ultra-high purity grades make it the standard for semiconductor wet processing.
Real-World Applications
Ultra-high purity PFA (PFA HP) is the standard for wet bench components, chemical delivery lines, and wafer carriers in semiconductor fabs — providing <1 ppb metal extractable levels.
PFA's chemical inertness and USP Class VI compliance make it suitable for single-use bioreactor liner films that contact cell culture media.
PFA tubing and fittings provide the highest purity and chemical resistance for aggressive chemical distribution in semiconductor and pharmaceutical manufacturing.
PFA's low extractables and chemical resistance make it standard for HPLC tubing, sample loops, and ICP-MS introduction systems where contamination must be minimized.
Processing & Cost Considerations
Manufacturing Tips
- PFA processes at 340-380°C melt temperature with mold temperatures of 130-160°C. It has higher melt viscosity than FEP, requiring higher injection pressures. The processing window is narrower than commodity plastics.
- PFA has low shrinkage (3-4%) and excellent dimensional stability. Mold design should account for the high thermal expansion differential between PFA and steel molds during cooling.
- For ultra-high purity applications, avoid any contamination during processing. Use dedicated PFA-only processing equipment, and never run other materials through the same machine before PFA without thorough purging.
PFA is expensive at $50-100/kg, with ultra-high purity grades reaching $150+/kg. This premium reflects the specialized manufacturing required to achieve semiconductor-grade purity. For semiconductor applications, PFA's purity justifies the cost — metal contamination from alternative materials would destroy wafer yields worth millions of dollars. For less purity-critical applications, FEP or PVDF may be more cost-effective.
Technical Properties
| Density | 2.15 g/cm³ |
|---|---|
| Tensile Strength | 28 MPa |
| Melting Point | 305 °C |
| Shrinkage Rate | 3.0-5.0% |
| Flexural Modulus | 0.6 GPa |
| Hdt | N/A (Low — specify filled grades for structural use) |
| Continuous Service Temp | 260 °C |
Engineering Tool: Shrinkage & Cost Estimator
Calculate part weight, mold cavity dimensions accounting for shrinkage, and material cost — all locally in your browser.
Equivalents & Cross-References
| Equivalent / Alternate | Action |
|---|---|
| Chemours Teflon PFA | |
| Dyneon PFA | |
| Daikin Neoflon PFA |
Frequently Asked Questions
How does PFA compare to PTFE when both are rated for 260°C continuous service?
While both PFA and PTFE share the same 260°C continuous service temperature rating, PFA offers three key advantages: (1) Melt processability—PFA can be injection molded into complex, smooth-surfaced geometries; PTFE requires compression molding and machining, which leaves microscopic surface roughness that traps particles. (2) Mechanical properties at temperature—PFA retains approximately 15% higher tensile strength at 250°C compared to PTFE due to its slightly more rigid backbone from the perfluoroalkoxy side groups. (3) Lower permeation—PFA's gas and vapor permeability is approximately 50% lower than PTFE's due to the side groups reducing free volume in the amorphous phase. The one area where PTFE still excels: cost. PTFE is approximately 50-70% the price of PFA, so for simple geometries (gaskets, seals, bushings) where machining is acceptable, PTFE remains the economic choice.
What is the difference between PFA and PTFE?
PFA and PTFE have nearly identical chemical resistance and 260°C maximum service temperature. The key difference: PFA is melt-processable (can be injection molded and extruded), while PTFE cannot melt-flow and requires compression molding and sintering. PFA also has slightly lower mechanical properties (tensile 28 MPa vs 25 MPa for PTFE — similar) and is transparent (PTFE is opaque). PFA costs roughly 2× PTFE.
What makes PFA 'ultra-high purity'?
Ultra-high purity PFA (PFA HP/PFA SUPRA) is manufactured with special controls to minimize metal ion content (<1 ppb extractable metals), particle generation, and outgassing. The resin is produced in dedicated lines, handled in cleanroom conditions, and tested with ICP-MS to certify purity. This is essential for semiconductor manufacturing where even trace metals cause defects.
Can PFA be used for continuous service at 260°C?
Yes. PFA is rated for continuous use at 260°C (500°F), same as PTFE. At this temperature, PFA maintains useful mechanical properties while most other thermoplastics would have melted or degraded. Short-term excursions to 280-300°C are possible but reduce service life.
Is PFA suitable for food processing?
Yes. PFA complies with FDA 21 CFR 177.1550 for repeated food contact. It is used in food processing equipment for hot-fill lines, conveyor components, and baking surfaces. PFA's non-stick surface and chemical resistance allow easy cleaning and resist food product buildup.
How does PFA compare to PVDF for cost-sensitive applications?
PVDF costs roughly half the price of PFA ($20-50/kg vs $50-100/kg) and offers easier processing at lower temperatures. However, PVDF has lower chemical resistance (attacked by strong bases and polar solvents) and lower temperature rating (150°C vs 260°C). Choose PVDF when your chemical environment is compatible; PFA when universal chemical resistance is needed.
Related Diagnostics & Materials
PEEK Polyetheretherketone: High-Performance Polymer...
Polyetheretherketone (PEEK) is a colorless organic thermoplastic polymer in the polyaryletherketone (PAEK) family,...
Ultem PEI (Polyetherimide): High-Temperature Amorphous...
Polyetherimide (PEI), best known by Sabic's trade name Ultem, is an amorphous high-performance thermoplastic...
PTFE Teflon: Ultimate Chemical Resistance & Low-Friction...
Polytetrafluoroethylene (PTFE), widely known by the trade name Teflon, is a fluoropolymer with the lowest...
PPS Ryton: Polyphenylene Sulfide High-Temp...
Polyphenylene sulfide (PPS), best known by Solvay's trade name Ryton, is a semicrystalline high-performance...
LCP Vectra: Liquid Crystal Polymer for Micro-Molding &...
Liquid Crystal Polymer (LCP), best known by Celanese's trade name Vectra, is a unique class of thermotropic...
Vespel Polyimide: Extreme-Temperature Polymer for...
Polyimide (PI), commercially known as DuPont Vespel, is the highest-temperature-rated polymer commercially...
PAI Torlon: Polyamide-Imide Extreme-Performance Polymer...
Polyamide-imide (PAI), commercially known as Solvay Torlon, occupies the performance space between PEEK and...
PES Veradel: Polyethersulfone Transparent High-Temp...
Polyethersulfone (PES), commercially known as Solvay Veradel or BASF Ultrason E, is an amorphous high-temperature...
References & Industry Standards
- ASTM International. Standard Specifications for Engineering Plastics & Thermoplastics. astm.org
- UL Prospector. Plastics & Elastomers Material Database. ulprospector.com
- MatWeb. Material Property Data for Engineering Thermoplastics. matweb.com
- ISO 1043. Plastics — Symbols and Abbreviated Terms. iso.org