Water-dispersible paper
An object of the present invention is to provide a water dispersion paper having quick water dispersion property and high strength (printability) and whose paper surface pH is 6 to 8 (neutral range), and also to provide a water dispersion coated paper designed to ensure quick water dispersion property and prevent discoloration over time. A water dispersion paper made of wood pulp and/or non-wood pulp, wherein said water dispersion paper is characterized in that purified pulp containing α-cellulose by 88 percent by weight or more accounts for 15 to 95 percent by weight of all pulp, as well as a water dispersion coated paper having a water-soluble coating layer on said water dispersion paper.
1. A water dispersion coated paper constituted by:
a base material which is a water dispersion paper made of wood pulp and/or non-wood pulp, wherein purified pulp containing α-cellulose by 88 percent by weight or more accounts for 15 to 95 percent by weight of all pulp, and
a coating layer provided on top, whose primary constituent is water-based coating material.
2. A water dispersion coated paper according to claim 1 , wherein the coating layer is a thermo-sensitive recording layer, inkjet recording layer or general printing layer.
3. A water dispersion coated paper according to claim 1 , wherein a water-soluble sealer layer is provided between the base material and the coating layer and/or on the uncoated side of the base material.
4. A water dispersion coated paper according to claim 1 , wherein water-soluble or water-redispersible pressure-sensitive adhesive is used to provide a pressure-sensitive adhesive layer on another side of the base material opposite to one side on which the coating layer is formed.
5. A water dispersion coated paper according to claim 4 , wherein the water dispersion coated paper is a label displaying information of food material, etc., on the coating layer.
6. A water dispersion coated paper according to claim 1 , wherein the water dispersion coated paper is a printing paper for confidential documents.
7. A water dispersion coated paper constituted by:
a base material which is a water dispersion paper made of wood pulp and/or non-wood pulp, wherein said water dispersion paper is characterized in that purified pulp containing hemi-cellulose by less than 12 percent by weight accounts for 15 to 95 percent by weight of all pulp, and
a coating layer provided on top, whose primary constituent is water-based coating material.
8. A water dispersion coated paper according to claim 7 , wherein the coating layer is a thermo-sensitive recording layer, inkjet recording layer or general printing layer.
9. A water dispersion coated paper according to claim 7 , wherein a water-soluble sealer layer is provided between the base material and the coating layer and/or on the uncoated side of the base material.
10. A water dispersion coated paper according to claim 7 , wherein water-soluble or water-redispersible pressure-sensitive adhesive is used to provide a pressure-sensitive adhesive layer on another side of the base material opposite to one side on which the coating layer is formed.
11. A water dispersion coated paper according to claim 10 , wherein the water dispersion coated paper is a label displaying information of food material, etc., on the coating layer.
12. A water dispersion coated paper according to claim 7 , wherein the water dispersion coated paper is a printing paper for confidential documents.