High-efficiency, self-supporting filter element made from...

Details High-efficiency, self-supporting filter element made from... High-efficiency, self-supporting filter element made from...

B - Operations, Transporting

01

D

B01D 39/16 (2006.01) B01J 35/06 (2006.01) B29C 61/06 (2006.01)

Patent

CA 2118259

A self-supporting filter element is produced from a precursor fiber web according to one of several methods. The precursor fiber web contains heat-shrinkable fibers or binder fibers or both. The web is exposed to temperatures sufficiently elevated to cause shrinkage of the fibers or melting of the binder. After cooling the web, the filter elements produced are self-supporting, and may have densities up to 500 kg/m3 to improve filtration while retaining good functional characteristics for operating pressure drop and air permeability. The self-supporting filter elements can be constructed of one material, and thus may be suitable for recycling.

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