PFA and PTFE are two materials that are used extensively in industrial coatings. Each has its own characteristics for applications that are quite demanding. Understanding the differences between the two makes it easier to choose which is best for your business.
At Reklin we have been working for years with industrial solutions using coatings made of these materials and others. As we have a lot of experience in Teflon coatings, we can tell you first hand everything you need to know about these materials.
What is PFA and how is it used?
PFA (Perfluoroalkoxy) is a fluorinated polymer that combines high chemical resistance with excellent non-stick properties. What is most striking about this material is that it is flexible and can withstand very extreme temperatures, from -200°C to +260°C.
This material is mainly used in industry as a coating for molds, trays and surfaces where parts need to be easy to demold. Sectors such as the food, pharmaceutical and chemical industries choose it for its resistance to acids, bases and aggressive solvents.
Another key application of this polymer is in pipe and valve coatings for corrosive fluids. Its low chemical reactivity and smooth surface prevent the accumulation of residues, improving efficiency in industrial processes. In addition, it is a recyclable material, aligning with sustainability practices.
What is PTFE and its main characteristics?
PTFE (Polytetrafluoroethylene) is one of the most well-known fluoropolymer materials, especially for its resistance to chemicals and heat. Its molecular structure gives it very particular properties, including non-stick properties.
Unlike PFA, polytetrafluoroethylene does not flow as well when molten and is therefore not used in certain molding processes. However, its stability at temperatures up to 260°C and against chemical agents make it indispensable in some industries.
The main characteristics of this material are as follows:
- Extreme chemical resistance. Inert to almost all chemical reagents, including concentrated acids and organic solvents.
- Non-stick properties. Surface with one of the lowest coefficients of friction known, ideal to avoid sticking.
- Thermal stability. Maintains its properties from -200°C to +260°C without degrading.
- Excellent electrical insulation. Widely used in the electronics and cable industry.
- Low moisture absorption. Waterproof and resistant to humid or corrosive environments.
Thanks to these properties, PTFE is a versatile material in sectors such as food, medical, chemical and aeronautics.
Key differences between PFA and PTFE
Although both materials share characteristics such as excellent chemical resistance and non-stick properties, they have key technical differences. These determine their suitability depending on the industrial application. Let’s see:
Thermal and chemical properties
As already mentioned, these two materials stand out for their stability under extreme conditions, but there are notable differences in their behavior. While PTFE maintains its properties up to 260°C, Perfluoroalkoxy offers greater resistance to thermal stress and deformation under continuous load.
The following table summarizes their comparative characteristics:
| Property | PFA | PTFE |
| Thermal range | -200°C to +260°C | -200°C to +260°C |
| Chemical resistance | Excellent except for molten alkali metals | Inert to almost all chemicals |
| Fluidity in melt | High. Suitable for injection molding) | Low. Limited to sintered processes |
Durability and abrasion resistance
PFA outperforms polytetrafluoroethylene in mechanical and wear resistance, thanks to its more flexible molecular structure. This makes it ideal for parts subject to constant friction, such as chain guides or roller coverings in the food industry.
PTFE, although less resistant to abrasion, offers a more slippery and stable surface in static applications. It is commonly used in gaskets, seals and coatings where low friction is a priority.
In corrosive environments with dynamic loads, the former is the preferred choice. However, for applications requiring maximum purity and anti-adhesion such as chocolate molds or medical equipment, the latter remains irreplaceable.
For applications combining high temperatures, abrasion and hygienic requirements (such as industrial ovens or bakery molds), PFA offers an optimal balance. On the other hand, in static components or where anti-adherence is a priority, PTFE retains technical advantages.
What is the best option for your industry?
The choice between the two materials depends on three key factors: thermal conditions, exposure to chemicals and the type of mechanical stress the material will be subjected to. This gives a clear idea of which material to use.
Industries such as chemicals and pharmaceuticals tend to prefer PFA for its durability in aggressive environments. While
At Reklin we have the experience to advise our customers in the selection of the ideal material for their project. We develop customized coatings guaranteeing technical solutions adapted to the specific challenges of your industry.