Conventional cellulose fibers are larger than Ultra-Web® nanofibers, and have larger spaces between the fibers, causing contaminant to load in the depth of the media and plug the airflow path; resulting in higher restriction and less capacity.
White circles represent the diameter of a 2µ and a 5µ particle.
Ultra-Web nanofibers have submicron diameters and small interfiber spaces, which result in more contaminant being captured on the surface of the media and lower restriction.
Ultra-Web is a registered trademark of Donaldson Company, Inc.