Surface energy of the film is increased by ionization, flame treatment, or because the film contains some manner of “roughener” to improve adhesion of subsequent coatings. For print acceptors, Capstone™ fluorosurfactants improve wetting and leveling of coatings for ink, improve adhesion, abrasion resistance, reduce transfer, and improve general “printability.” In a variety of coating applications, Capstone™ fluorosurfactants can provide antistatic properties. In addition to wetting, Capstone™ fluorosurfactants migrate to the top of a coating and thus encourage rewetting in multi-coat operations.
In release coatings, there are two general types of films: cast (polymer is dissolved in solvent, cast on a belt or drum, and the solvent is driven off and recovered) and extruded (melted resin is pushed through a die). Since Capstone™ fluorosurfactants migrate to the liquid-air interface in coatings, they can impart release characteristics to that coating surface.
Overall, a variety of Capstone™ fluorosurfactants can provide the performance benefits in film applications of anti-block, antistatic, improved surface properties, film leveling (even thickness), reduction in cratering (due to the presence of impurities), water repellency, wetting and film release (off the belt/drum without deformation, tearing or edge effects).
Capstone™ Fluorosurfactants Literature