Wet strength treated paper and paperboard
AssigneeGeorgia-Pacific Chemicals LLC
InventorsGregg A. Reed, William J. Haskins, Lakeisha D. Talbert
Life of this patent
Estimating the term…
Abstract
A process for improving the wet strength of paper or paperboard is disclosed, and compositions, methods, and products related to improved wet strength paper or paperboard are provided. The process includes, for example, contacting at least one side of the paper or paperboard with water or an aqueous composition to wet the paper or paperboard, contacting the wet paper or paperboard with a wet strength resin composition followed by drying the paper or paperboard. The resulted treated or coated paper or paperboard has comparable wet strength properties to that of paper or paperboard containing wet strength resin from a conventional wet end application.
Claims20
A process for improving the wet strength of paper or paperboard, comprising:
- a) providing a paper or paperboard having a first side and a second side;
- b) contacting at least one of the first side and the second side with water or an aqueous composition for a first time period to provide a wet paper or paperboard;
- c) contacting the wet paper or paperboard with a wet strength resin composition for a second time period to provide a treated paper or paperboard;
- and
- d) drying the treated paper or paperboard.
A process according to claim 14, wherein the polyamine is reacted with a mono-functional modifier prior to, during, or after treating with the epihalohydrin, and wherein the mono-functional modifier is selected from a neutral or cationic acrylate compound, a neutral or cationic acrylamide compound, an acrylonitrile compound, a mono-epoxide compound, and a combination thereof.
Paper or paperboard having improved wet strength comprising a treated fibrous web, the treated fibrous web comprising:
- a) cellulose fibers, a portion of which having intact inter-fiber hydrogen bonding and a portion of which having inter-fiber hydrogen bonding at least partially disrupted with water or an aqueous composition;
- b) a wet strength resin composition in contact with the cellulose fibers having partially disrupted inter-fiber hydrogen bonding.
A process for improving the wet strength of paper or paperboard, comprising:
- a) providing a paper or paperboard having a first side and a second side;
- b) contacting at least one of the first side and the second side with an aqueous surfactant composition for a first time period to provide a wet paper or paperboard;
- c) contacting the wet paper or paperboard with a wet strength resin composition for a second time period to provide a treated paper or paperboard, wherein the wet strength resin composition comprises an epihalohydrin-modified polyamine, and the polyamine has the structure:
- and wherein R is alkyl, hydroxyalkyl, amide, aryl, heteroaryl, cycloalkyl, or poly-primary amine, and w is an integer from 1 to about 10,000;
- and
- d) drying the treated paper or paperboard.
Dependencies are inferred from the claim text.