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US 8,007,638 B2Granted
Sheet-like products exhibiting oleophobic and hydrophobic properties
AssigneeAstenJohnson, Inc.
InventorsSamuel Baker, Jackson Graham, Dietmar Wirtz
Life of this patent
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AssigneeAstenJohnson, Inc.
InventorsSamuel Baker, Jackson Graham, Dietmar Wirtz
Estimating the term…
A method of manufacturing a cellulosic sheet having at least one of hydrophobic and oleophobic properties comprises the steps of depositing a stock of cellulosic fibers onto at least one forming fabric at an impingement zone and forming a web therefrom in a formation process; combining a water-based composition comprising an adhesion promoter, an organic nanoparticulate polymer and a fluorocarbon with the web at a preselected combination stage prior to a heating stage at which the web is subjected to a temperature exceeding 60° C.; and heat-curing the composition with the web during a drying process. A water-based composition for imparting at least one of hydrophobic and oleophobic properties to a cellulosic sheet during manufacture comprises an adhesion promoter, an organic nanoparticulate polymer and a fluorocarbon. A cellulosic sheet or layer thereof has at least one of hydrophobic and oleophobic properties. Improved resistance of cellulosic sheets to oil or water is obtained.
A method of manufacturing a cellulosic sheet having at least one of hydrophobic and oleophobic properties, the method comprising
A cellulosic sheet having at least one of hydrophobic and oleophobic properties, and being manufactured as a web from a stock of cellulosic fibres wherein the web is combined with a water-based composition comprising an adhesion promoter, an organic nanoparticulate polymer and a fluorocarbon, wherein the adhesion promoter is an organofunctional silane, the organic nanoparticulate polymer is selected from the group consisting of nanowaxes of polyethylene or polypropylene, and prepolymers of a condensated silane, and the fluorocarbon is selected from the group consisting of a fluoroacrylate and a fluoralkyl-polyurethane copolymer.
A multi-layer cellulosic sheet having at least one of hydrophobic and oleophobic properties, at least one layer being manufactured as a web from a stock of cellulosic fibres wherein the web is combined with a water-based composition comprising an adhesion promoter, an organic nanoparticulate polymer and a fluorocarbon, wherein the adhesion promoter is an organofunctional silane, the organic nanoparticulate polymer is selected from the group consisting of nanowaxes of polyethylene or polypropylene, and prepolymers of a condensated silane, and the fluorocarbon is selected from the group consisting of a fluoroacrylate and a fluoralkyl-polyurethane copolymer.
Dependencies are inferred from the claim text.