High-bulk, wood containing printing paper
AssigneeNippon Paper Industries Co., Ltd.
InventorsHiroshi Ono, Masayuki Watanabe, Fuminari Nonomura, Yasunori Nanri
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Abstract
Coat a starch-based surface-paper-strengthening agent on a base paper made from a paper material that contains at least chemically processed hardwood mechanical pulp and bulk-increasing agent; where it is desirable that the hardwood mechanical pulp with a single fiber density index of 0.20 or more be blended by 10 to 60 weight-% of the total weight of pulp, with the adding amount of bulk-increasing agent adjusted to 0.1 to 1.2 weight-% and the coating amount of starch-based surface-paper-strengthening agent, to 0.3 to 3.0 g/m2.
Claims7
A high-bulk, wood-containing calendered printing paper having a density of 0.35 to 0.50 g/cm3, comprising:
- a base paper comprising at least a bulk-increasing agent and one or more of hardwood mechanical pulp selected from refiner groundwood pulp, thermomechanical pulp, chemi-thermomechanical pulp, alkali peroxide mechanical pulp, or alkali peroxide thermomechanical pulp, wherein the hardwood mechanical pulp is included in an amount of 10% to 60% by weight of the pulp contained in the base paper, wherein the bulk-increasing agent is contained in an amount of 0.1% to 1.2% as solid by weight of the total bone-dry weight of pulp contained in the base paper;
- and
- a starch-based surface-paper-strengthening agent coated on a surface of the base paper in an amount of 0.3 g/m2to 3.0 g/m2.
Dependencies are inferred from the claim text.