Making Fluoroplastics bondable
Often we get requests of Fluoroplastics that need to be bonded to other components or onto a final product. Due to the non-stick qualities of the Fluoroplastics, it’s not possible to make a strong bond without etching the surface first. A good etch strips the fluorine molecules of the surface of the Fluoroplastics exposing the carbon particles hence the color change, this makes it bondable to the end-product or roller.
We offer three different types of etching:
The surface of the Fluoroplastics is treated with an electric charge. Advantage of this method is that the surface will remain transparent in contrast with the two other methods. This method can only be used on thin FEP material, no more than 50 microns.
Sodium Naphthalene etch
A solution of sodium and naphthalene molecular changes the surface of the FEP or PFA. This is the most commonly used treatment for the etching of the FEP and PFA materials.
The final product will get a light brown color.
Sodium Ammonia etch
A solution of sodium and ammonia molecular changes the surface, this results in a dark brown sometimes splashy surface. We use this type of etching only for PFA heat shrinkable and PFA tubes or hoses.