Nanofiber filter media

Details Nanofiber filter media Nanofiber filter media

B - Operations, Transporting

01

D

B01D 39/00 (2006.01) A61L 2/00 (2006.01) A61L 2/02 (2006.01) A61L 9/16 (2006.01) B01D 29/00 (2006.01) B01D 29/15 (2006.01) B01D 37/02 (2006.01) B01D 39/02 (2006.01) B01D 39/08 (2006.01) B01D 39/16 (2006.01) B01D 39/18 (2006.01) B01D 39/20 (2006.01) B01J 20/28 (2006.01) B01J 20/32 (2006.01) C02F 1/00 (2006.01) C12H 1/044 (2006.01) C12H 1/056 (2006.01) D21F 11/14 (2006.01) C02F 1/28 (2006.01) C02F 1/42 (2006.01) C02F 1/44 (2006.01) C02F 1/76 (2006.01)

Patent

CA 2474854

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 cm 2 in 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.

la présente invention concerne un milieu filtrant pour filtre à air renfermant des nanofibres, qui présente une épaisseur de moins de 0,25 millimètre, un facteur de mérite supérieur à 0,075 environ, et une efficacité supérieure à 99,9 % environ pour l'arrêt de particules d'aérosol de quelque 0,18 micron et une différentiel de pression d'environ 40 millimètres à la colonne d'eau sous un débit d'environ 32 litres/minute au travers d'un échantillon de 100 cm¿2?. On peut également utiliser un revêtement de nanofibres, de préférence fibrillées, pour améliorer les performances du matériau de filtre existant en en augmentant le facteur de mérite.

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