Teflon Non Stick Coatings
Teflon non stick coatings, including DuPont PTFE (polytetrafluoroethylene) can be excellent means for creating release.
Besides PTFE dispersion, consider too, PFA, MFA, and FEP. All have exceptional non-wetting properties, a quantifiable characteristic used to assess non stick performance. Is it the oleophobic (fats, oil rejecting) trait or hydrophobic (water repelling) properties you desire most?
Environmental constraints such as temperature, sticking product, and abrasion, may very well shape your fluoropolymer selection of Teflon non stick coatings. Generally speaking, failure to release relates to properties of the sticking compound. That is, its cohesive forces are weaker than their adhesive force to the non stick surface.
But sticking can also be the result of permeation. So be sure you understand the mechanism of sticking before you choose your next Teflon non stick coatings. Many products release well for the short-term. But it is long-term performance you are after, isn’t it?
For applications involving moving parts, you will most likely be constrained to lower builds and choice in DuPont products. So, depending on temperature, abrasion, even corrosion, you need to consider every environmental factor before selecting your Teflon non stick coatings.
Today, new co-polymer technologies are emerging for even greater Teflon non stick coatings performance. Better news is that their mechanical properties continue to be strengthened, even at higher temperatures.
Many Teflon non stick coatings are compliant with the Food & Drug Administration (FDA) for food service contact. And many, too, are getting increased acceptance in the medical industry involving short-term or indirect tissue contact.
Teflon non stick coatings are compatible with most substrate. Though you will need to identify the effects on your work piece, if any, from heating. While coatings or select polymers can be applied as low as room temperature, most require higher temperature processing (600 to 700 degrees F) for best results or compliance with manufacturer guidelines.