Nanofiber filter media

Details Nanofiber filter media Nanofiber filter media

2005-03-29

2005-03-29

Fortuna, Ana (Department: 1723)

Liquid purification or separation

Filter

Material

C210S505000, C210S506000, C210S507000, C210S500100, C055S527000, C055S528000, C264S203000, C428S181000

Reexamination Certificate

active

06872311

ABSTRACT:
The present invention is directed to an air filter medium comprising nanofibers, the filter medium having a thickness of less than 0.25 millimeters, a Figure of Merit of greater than about 0.075, and an efficiency of greater than about 99.9% when capturing aerosol particles of about 0.18 microns in size and a pressure drop of less than about 40 millimeters water column at a flow rate of about 32 liters/minute through a sample 100 cm2in size. A coating of the nanofibers may also be used to enhance performance of existing filter media by increasing the FOM of the existing filter media. Preferably, the nanofibers are fibrillated.

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