Vapor deposition treated electret filter media

Details Vapor deposition treated electret filter media Vapor deposition treated electret filter media

B - Operations, Transporting

01

D

B01D 39/16 (2006.01) B01D 39/20 (2006.01)

Patent

CA 2436236

A vapor phase treated electret filter media includes an additive or mixtures thereof that enhance the charge stability of the media. The filter media achives 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. Exemplary vapor phase deposition monomers include fluorinated monomers.

L'invention concerne un filtre électret traité en phase vapeur. Ce filtre comprend un additif ou des mélanges de ces derniers qui améliorent la stabilité de la charge des milieux. Ces milieux filtrants présentent des valeurs alpha acceptables pour la plage de filtration ciblée sans décroissance significative des valeurs alpha avec le temps. Les additifs de charges préférés comprennent des amides d'acides gras et des mélanges de ces derniers. A titre d'exemple, des monomères de dépôt en phase vapeur comprennent des monomères fluorés.

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