Charge stabilized electret filter media

Details Charge stabilized electret filter media Charge stabilized electret filter media

B - Operations, Transporting

01

D

B01D 39/16 (2006.01) B03C 3/28 (2006.01)

Patent

CA 2375574

An electret filter media includes an additive or mixtures thereof that enhance the charge stability of the media. The filter media achieves acceptable alpha values for a range of filtration challenges without significant decay in alpha values over time. Preferred charge additives include fatty acid amides and mixtures thereof.

L'invention concerne un matériau filtrant à électret renfermant un additif ou des combinaisons d'additifs qui améliorent la stabilité en charge du matériau. Ledit matériau présente des valeurs alpha acceptables pour un éventail de cas de filtration, sans décroissance appréciable de ces valeurs dans le temps. De préférence, les additifs de stabilisation en charge sont du type amides d'acides gras, y compris leurs combinaisons.

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