A filter cartridge (20) and method for making a filter cartridge (20)
for removing particulates from a particulate laden fluid stream moving one direction
through the filter cartridge. The filter cartridge (20) is periodically
subject to cleaning fluid moving in an opposite direction to the fluid stream.
The filter cartridge (20) comprises filtration media (24) formed
into a tubular configuration and having a plurality of circumferentially spaced
apart pleats (26). A retention device (82) to limit radial movement
of the filtration media (24) when subjected to the periodical cleaning fluid
and to maintain the pleats (26) in the filtration media circumferentially
spaced apart when exposed up to 130 degrees Celsius. Preferably, the extrudate
(144) is thermoplastic, polyester, elastomeric material and at least one
additive may be present. Multiple layers of the extrudate (144) may be fused together.
