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AssigneeDonaldson Company, Inc.
InventorsVeli Kalayci, Douglas Crofoot, Timothy Grafe, Kristine Graham
Estimating the term…
A web can comprise a substantially continuous fiber mass and a separation means dispersed into the fiber. The web having a preferred thickness resulting from forming a polymer material and a particulate into a fine fiber layer can have a variety of end uses. A filtration media can include a structure comprising such a web of fine fiber and a substantial volume of particulate embodiment of the separation means. The resulting fine fiber structure provides an improved filtration medium having substantial depth, thickness, and a layered structure. The improved properties of the web results from inclusion of the separation or spacer particulate.
A web comprising a substantially continuous fine fiber layer having a layer thickness of 0.5 to 500 microns, the layer comprising a spacer means comprising a particulate with a particle size of 0.05 to 200 microns dispersed throughout the fiber in the layer, the particulate present in an amount of 0.1 to 50 vol %;
A method to make a filter media comprising forming a substantially continuous fine fiber layer on a substrate, the fiber having a layer thickness of 0.5 to 500 microns, the layer comprising a spacer means comprising a particulate with a particle size of 0.05 to 200 microns dispersed throughout the fiber in the layer, the particulate present in an amount of 0.1 to 50 vol %;
Dependencies are inferred from the claim text.