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US 2010/0163196 A1Published application
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
Life of this patent
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Abstract
A high-yield paper sheet generally includes at least about 50 weight percent mechanical pulp, wherein the basis weight of the sheet is in the range of about 24 to about 60 pounds, and wherein the porosity of the sheet is in the range of about 40 to about 100 Sheffield porosity.
Claims17
A high-yield paper sheet, comprising:
- at least about 50 weight percent mechanical pulp, wherein the basis weight of the sheet is in the range of about 24 to about 60 pounds, and wherein the porosity of the sheet is in the range of about 40 to about 100 Sheffield porosity.
A high-yield paper sheet, comprising:
- at least about 50 weight percent mechanical pulp, wherein the basis weight of the sheet is in the range of about 35 to about 55 pounds, and wherein the porosity of the sheet is in the range of about 40 to about 100 Sheffield porosity.
A high-yield paper sheet, comprising:
- at least about 50 weight percent mechanical pulp, wherein the basis weight of the sheet is less than about 45 pounds, wherein the porosity of the sheet is in the range of about 40 to about 100 Sheffield porosity, and wherein the total color hexagon of the sheet is greater than about 0.70.
Dependencies are inferred from the claim text.