Maybe this will help and there is a pic on the link of the "fleece" element ( scroll down for it):
Automotive Oil Filter, Mann + Hummel (Germany)
Introduced in September 2003, this new oil filter is described as “the world’s first fully synthetic oil filter element for automotive applications.” The filter material uses a polyester fleece, which is up to 15 times more resistant to aging than cellulose. The two-layered filter medium consists of a support and drainage layer as well as an active filter layer.
The first fully synthetic oil filter media, the Automotive Oil Filter was developed by Mann + Hummel of Germany. Unlike typical automotive filters, which are cellulose based, this filter is not attacked by the lube oil while the car is running. This allows these polyester-based filters to last three to five times longer than paper products, depending on the vehicle, according to Markus Kolczyk, head of filter development.
Launched at the Frankfurt motor show in 2003, these filters comprise a support and drainage layer as well as an active filter layer with an optimized layer set-up. This set-up and the individual layers are specifically matched to one another to guarantee maximum filtration performance with regard to filter fineness, dirt-holding capacity and pressure loss. The completely synthetic filter element technology and the filter media can be used for all engine applications and designs of filter elements and can also be used retro-compatibly for existing applications. Additionally, this filter’s disposal is more environmentally pleasing than cellulose materials.
http://www.nonwovens-industry.com/articles/2005/01/feature3.php
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