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US 5,702,616 AGranted
Aramid fiber filtration sheet
AssigneePall Corporation
InventorsPeter J. Degen, Warren M. Foss
Life of this patent
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AssigneePall Corporation
InventorsPeter J. Degen, Warren M. Foss
Estimating the term…
The present invention provides a polymeric, particularly aramid, fiber filtration sheet having a relatively small pore size and high pore uniformity. The present inventive aramid fiber filtration sheet preferably has a titer reduction against bacteria such as Pseudomonas diminuta. The present invention also provides a method of preparing reduced-diameter aramid fibers, as well as a method of preparing an aramid fiber filtration sheet from such reduced-diameter aramid fibers. The present invention further provides a method of treating a fluid by passing a fluid through the present inventive aramid fiber filtration sheet, as well as a filter element incorporating the present inventive aramid fiber filtration sheet.
A method of treating a fluid comprising passing a fluid through an aramid fiber sheet having a first bubble point of about 100 in. water column or more.
A method of treating a fluid comprising passing a fluid through an aramid fiber sheet having a titer reduction of about 10.sup.5 or more against Pseudomonas diminuta.
A filter element comprising an aramid fiber sheet having a first bubble point of about 100 in. water column or more and sides which have been overlapped and sealed to form a tubular configuration having an exterior surface, an interior, and two ends, and end caps sealed to the ends of the tube, wherein at least one of said end caps has a central aperture providing access to the interior of the tube, and all of said seals are fluid-tight.
A filter element comprising an aramid fiber sheet having a titer reduction of about 10.sup.5 or more against Pseudomonas diminuta and sides which have been overlapped and sealed to form a tubular configuration having an exterior surface, an interior, and two ends, and end caps sealed to the ends of the tube, wherein at least one of said end caps has a central aperture providing access to the interior of the tube, and all of said seals are fluid-tight.
A filter element comprising an aramid fiber sheet having a first bubble point of about 100 in. water column or more helically wrapped around a pervious, hollow tube to form an overlap of 0% to about 95% of the width of said aramid fiber sheet.
A filter element comprising an aramid fiber sheet having a titer reduction of about 10.sup.5 or more against Pseudomonas diminuta helically wrapped around a pervious, hollow tube to form an overlap of 0% to about 95% of the width of said aramid fiber sheet.
A filter element comprising an aramid fiber sheet having a first bubble point of about 100 in. water column or more.
A filter element comprising an aramid fiber sheet having a titer reduction of about 10.sup.5 or more against Pseudomonas diminuta.
Dependencies are inferred from the claim text.