Paper making and fiber liberation – Processes and products – Non-fiber additive
Reexamination Certificate
2011-08-30
2011-08-30
Fortuna, José A (Department: 1741)
Paper making and fiber liberation
Processes and products
Non-fiber additive
C162S123000, C162S164100, C162S164300, C162S164400, C162S164500, C162S168100, C162S135000, C162S183000, C162S184000, C162S169000, C162S172000, C428S195100, C428S421000
Reexamination Certificate
active
08007638
ABSTRACT:
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.
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Baker Samuel
Graham Jackson
Wirtz Dietmar
AstenJohnson, Inc.
Fortuna José A
Volpe and Koenig P.C.
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