High-Yield Paper and Methods of Making Same
AssigneeNorth Pacific Paper Corporation (Norpac)
InventorsMichael J. Dougherty, Amar N. Neogi, David W. Park, Brian S. Delgardno
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Abstract
A method of making a high-yield paper sheet generally includes blending a pulp mixture including at least about 50 weight percent mechanical pulp, making an uncoated paper sheet from the pulp mixture, applying a surface layer to the paper sheet, the surface layer including nPCC, and drying the sheet, wherein the basis weight of the dried sheet is in the range of about 24 to about 60 pounds.
Claims18
A method of making a high-yield paper sheet, the method comprising:
- (a) blending a pulp mixture including at least about 50 weight percent mechanical pulp;
- (b) making an uncoated paper sheet from the pulp mixture;
- (c) applying a surface layer to the paper sheet, the surface layer including nPCC;
- (d) drying the sheet, wherein the basis weight of the dried sheet is in the range of about 24 to about 60 pounds.
A method of making a high-yield paper sheet, the method comprising:
- (a) blending a pulp mixture including at least about 50 weight percent mechanical pulp;
- (b) making an uncoated paper sheet from the pulp mixture, wherein the sheet is oriented in the MD direction;
- (c) applying a surface layer to the paper sheet, the surface layer including nPCC;
- (d) drying the sheet, wherein the basis weight of the dried sheet is in the range of about 35 to about 55 pounds.
A method of making a high-yield paper sheet, the method comprising:
- (a) blending a pulp mixture including at least about 50 weight percent mechanical pulp;
- (b) making an uncoated paper sheet from the pulp mixture;
- (c) applying a surface layer to the paper sheet, the surface layer including nPCC;
- (d) drying the sheet, wherein the basis weight of the dried sheet is less than about 45 pounds, and wherein the drying conditions include about 4 to about 12 percent moisture into the size press and about 4 to about 10 percent moisture at the reel.
Dependencies are inferred from the claim text.