Multiple pores vivisble at the surface divide further into individual pore channels inside the membrane. This guarantees that all pores have the same diameter. Thus RoTrac® Capillary Pore Membranes differ from the microporous membranes with a fibril or sponge structure, whose irregular structure means that defined pore size can not be produced.

Due to that, RoTrac® Membranes offer functional advantages.