Coatings

While AFC has an extensive knowledge of many different types of coatings, our recent focus has been on waterborne and UV coatings.

Waterbourne

Waterbourne coatings are based on acrylic, polyurethane or alkyd polymer emulsions. The film is formed when water evaporates from the applied coatings and the dispersed polymer particles join together.

Relevant characteristics are:

  • medium to low solids content
  • medium to low mechanical properties and chemical resistance (may be improved by addition of a cross linker)
  • greater environmental safety than solvent-based coatings
  • possibility of blocking problems on exposure to heat due to the thermo plasticity of resins.

UV Cured

UV Cured coatings are based on a blend of poly-functional unsaturated polyesters or acrylates, reactive thinners and photo-initiators. These coatings are 100% solids, and undergo instant curing when irradiated by UV light, allowing immediate stacking.

Films obtained are very hard and show good resistance to abrasion and chemicals. UV coatings are usually applied by roller coater but formulations for spray or curtain coating are also available.

Polyurethane (PU) Based

Polyurethane (PU) Based coatings usually consist of two components: one isocyanate-rich solution and one polyol-rich solution. A polyurethane film is formed when the two components are combined and a rapid exothermic chemical polymerisation reaction takes place.

Polyurethane coatings offer unique handling, performance and environmental advantages. End users benefit from a greater level of assurance that the desired result will be achieved on time and on budget.