Multiple layer filter media

Details Multiple layer filter media Multiple layer filter media

B - Operations, Transporting

01

D

B01D 46/00 (2006.01) B01D 46/54 (2006.01)

Patent

CA 2690076

The invention provides a multiple layer filter media for removal of particles from a fluid stream. The multiple layer filter media may include a depth filtration layer, a membrane filtration layer and a support layer. Additional layers may be present. The membrane filtration layer may comprise expanded polytetrafluoroethylene (ePTFE). The various layers of the multiple layer filter media may be bonded together through a plurality of point bonds. The point bonding process may include simultaneously bonding multiple layers of the multiple layer filter media together in a single operation. The point bonds may be created using ultrasonic bonding. The invention provides a multiple layer filter media for removal of particles from a fluid stream. The multiple layer filter media may include a depth filtration layer, a membrane filtration layer and a support layer. Additional layers may be present. The membrane filtration layer may comprise expanded polytetrafluoroethylene (ePTFE). The various layers of the multiple layer filter media may be bonded together through a plurality of point bonds. The point bonding process may include simultaneously bonding multiple layers of the multiple layer filter media together in a single operation. The point bonds may be created using ultrasonic bonding.

La présente invention concerne un milieu filtrant multicouche pour l'élimination de particules à partir d'un écoulement de fluide. Le milieu filtrant multicouche peut comporter une couche de filtration en profondeur, une couche de filtration membranaire et une couche de support. D'autres couches additionnelles peuvent être prévues. La couche de filtration membranaire peut comporter du polytétrafluoroéthylène expansé (ePTFE). Les diverses couches du milieu filtrant multicouche peuvent être assemblées par une pluralité de liaisons ponctuelles. Le procédé de liaison ponctuelle peut comprendre l'assemblage simultané d'une pluralité de couches du milieu filtrant multicouche en une seule opération. Les liaisons ponctuelles peuvent être créées au moyen de soudage par ultrasons.

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