Glossary
Filtration Fabrics

Capillary flow porometry

A technique for characterizing porosity that involves draining a wetting liquid through the pores of a material.

Fibrous filtering media (filter); Filtering fibrous media

A porous material intended for filtration applications and composed of fibrous elements.

Fibrous unit

An element selected as a unit for describing a fibrous filter medium. It may be a fiber, a filament, or a yarn.

Fine particles (PM2.5)

Solid particles suspended in the air, with a diameter of less than 2.5 µm.

Knitted fabric

A textile structure formed by interlacing loops of yarn.

Mean free path

The average distance traveled by a moving particle before interacting with the filter’s fibrous elements.

Nonwoven

A textile structure formed by assembling fibers, generally...