Textiles for Industrial Applications

265Textiles in Automobiles

© 2008 Taylor & Francis Group, LLC

the media via the impact impingement mechanism. Here, dirt strikes the

lter and attaches itself permanently. In the second mechanism, dirt can col-

lect as cluster aggregates, which are collection of particles, created by the

triboelectric nature of bers or the electrostatic charge that is generated dur-

ing uid ow. In the third, dirt can be trapped between the pores of the lter

media, particularly when they become clogged and reduced in size. The last

opportunity for a lter to capture dust arises from the interaction between

uid ow and pressure drop. When all these mechanisms are employed,

the total void volume of an air lter can be lled to 90% by the end of its

usefull ...