Air permeable antimicrobial powder coating for filter materials

 
New air permeable antimicrobial coatings for the use as filter materials were developed in the frame of a research project. Those coatings could be used either for new filter materials or for coating already existing filters. In this study different air permeable powder coatings were produced by functionalization of low temperature curing powder coatings with metal oxide nanoparticles. Different types of textile polymers and different mesh sizes were coated in order to investigate the influence on the air-permeability. This was tested using a breath resistance / valve test. The developed porous coatings reduce the air permeabilty of the textile but still show acceptable air permea-bility after being fully coated. The antimicrobial effect was achieved by the addition of silver nanoparticles. Both the antibacterial and anti-coronavirus test achieved an inhibition of > 99%.