Filter sheet
AssigneeCuno Incorporated
InventorsKenneth C. Hou, Eugene A. Ostreicher
Life of this patent
Estimating the term…
Abstract
A filter media sheet comprising fine particulate and a self-bonding matrix of cellulose fiber, the surfaces of at least one of which are modified with a polyamido-polyamine epichlorhydrin cationic resin, the matrix incorporating beaten cellulose fiber to provide a Canadian Standard Freeness of less than 600 ml.
Claims9
A filter medium sheet having enhanced capture potential for electronegative submicron particulate contaminants in a contaminated liquid passed therethrough, comprising at least about 50% by weight of siliceous particulate and a self bonding matrix of cellulose fiber, the surfaces of at least the particulate being modified with a sufficient amount of polyamido-polyamine epichlorhydrin cationic resin to impart a positive zeta potential to the surface of the filter media.
Dependencies are inferred from the claim text.