Filter medium and air filter unit

Details Filter medium and air filter unit Filter medium and air filter unit

B - Operations, Transporting

01

D

B01D 39/16 (2006.01) B01D 39/08 (2006.01) B01D 46/12 (2006.01) B01D 46/52 (2006.01) B01D 69/02 (2006.01) B01D 69/10 (2006.01) B01D 71/36 (2006.01) B32B 27/00 (2006.01) B32B 27/30 (2006.01)

Patent

CA 2263004

A filter medium having excellent efficiency and an air filter unit using the same are provided which have air permeable supporting material (3, 4) on at least one surface of a PTFE porous film (2). The maximum amount of organic materials detected from the filter medium is 3ng or less per gram of the filter medium.

On dépose des matériaux de base (3, 4) perméables au gaz sur au moins une surface d'un film poreux (2) de polytétrafluoroéthylène (PTFE) pour constituer un milieu filtrant efficace, pour un prix raisonnable, la quantité maximale de substances organiques présente dans le milieu filtrant étant égale ou inférieure à 3 nanogrammes pour 1 g de milieu filtrant. L'invention concerne également un filtre à air utilisant ce milieu filtrant.

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