초록 ▼

A paper or paperboard including a cellulose substrate and a coating applied to each side of the paperboard substrate to form a coated structure, the coated structure having a basis weight, a caliper thickness and a Parker Print Surf smoothness, the Parker Print Surf smoothness being at most about 2

A paper or paperboard including a cellulose substrate and a coating applied to each side of the paperboard substrate to form a coated structure, the coated structure having a basis weight, a caliper thickness and a Parker Print Surf smoothness, the Parker Print Surf smoothness being at most about 2 microns, the basis weight being less than about Y1 pounds per 3000 ft2, wherein Y1 is a function of the caliper thickness (X) in points and is calculated as follows: Y1=29.15+11.95X−0.07415X2.

대표청구항 ▼

1. A paperboard comprising: a solid bleached sulfate (SBS) paperboard substrate having a first side and a second side, wherein said substrate has a basis weight of at least 65 pounds per 3000 ft2, and wherein said substrate is substantially free of chemical bulking agents; anda first coating applied

1. A paperboard comprising: a solid bleached sulfate (SBS) paperboard substrate having a first side and a second side, wherein said substrate has a basis weight of at least 65 pounds per 3000 ft2, and wherein said substrate is substantially free of chemical bulking agents; anda first coating applied to said first side and a second coating applied to said second side to form a coated structure, said coated structure having a basis weight, a caliper thickness and a Parker Print Surf smoothness, said Parker Print Surf smoothness being at most 2 microns, said basis weight being less than Y1 pounds per 3000 ft2;wherein the first coating comprises a hyperplaty clay component having an average aspect ratio of at least 40:1;wherein Y1 is a function of said caliper thickness (X) in points and is calculated as follows: Y1=29.15+11.95X−0.07415X2. 2. The paperboard of claim 1 wherein at least one of said first and second coatings includes starch. 3. The paperboard of claim 1 wherein at least one of said first and second coatings includes coarse ground calcium carbonate and high aspect ratio clay. 4. The paperboard of claim 1 wherein said basis weight is less than Y2 pounds per 3000 ft2, wherein Y2 is calculated as follows: Y2=28.41+11.73X−0.07324X2. 5. The paperboard of claim 1 wherein said basis weight is less than Y3 pounds per 3000 ft2, wherein Y3 is calculated as follows: Y3=27.78+11.51X−0.07207X2. 6. The paperboard of claim 1 wherein said basis weight is less than Y4 pounds per 3000 ft2, wherein Y4 is calculated as follows: Y4=26.89+11.17X−0.07034X2. 7. The paperboard of claim 1 wherein said basis weight is at least Y5 pounds per 3000 ft2, wherein Y5 is calculated as follows: Y5=26.15+10.83X−0.06815X2. 8. The paperboard of claim 1 wherein said Parker Print Surf smoothness is at most 1.7 microns. 9. The paperboard of claim 1 wherein said Parker Print Surf smoothness is at most 1.5 microns. 10. The paperboard of claim 1 wherein at least one of said first and second coatings includes at least one pigment, and wherein each of said pigments in said coatings is an inorganic pigment. 11. The paperboard of claim 1 wherein said substrate is a single-ply substrate. 12. The paperboard of claim 1 wherein said substrate consists essentially of chemical pulp. 13. The paperboard of claim 1, wherein the first coating comprises a pigment blend including the hyperplaty clay component and a ground calcium carbonate component, wherein at most 60 percent of the ground calcium carbonate component has a particle size smaller than 2 microns. 14. The paperboard of claim 1 wherein said basis weight is at most Y5 pounds per 3000 ft2, wherein Y5 is calculated as follows: Y5=26.15+10.83X−0.06815X2. 15. The paperboard of claim 1 wherein at least one of said first and second coatings includes a basecoat and a topcoat, wherein said basecoat is positioned between said topcoat and said substrate. 16. The paperboard of claim 15 wherein at least one of said first and second coatings further includes an intermediate coating layer positioned between said basecoat and said topcoat. 17. A paperboard comprising: a solid bleached sulfate (SBS) paperboard substrate having a first side and a second side, wherein said substrate has a basis weight of at least 65 pounds per 3000 ft2, and wherein said substrate is substantially free of chemical bulking agents;a first coating applied to said first side and a second coating applied to said second side to form a coated structure, the first coating and second coating each comprising at least one of an inorganic pigment and starch;wherein the first coating includes subsurface voids defined by the first coating and having a transverse dimension of at least 6 microns;wherein said coated structure has a basis weight, a caliper thickness and a Parker Print Surf smoothness, said Parker Print Surf smoothness being at most 2 microns, said basis weight being less than Y1 pounds per 3000 ft2; andwherein Y1 is a function of said caliper thickness (X) in points and is calculated as follows: Y1=29.15+11.95X−0.07415X2. 18. The paperboard of claim 17 wherein at least one of said first and second coatings includes coarse ground calcium carbonate and high aspect ratio clay. 19. The paperboard of claim 17, wherein the first coating includes a surface and at least 50% of the first coating surface has subsurface voids defined by the first coating and having a transverse dimension of at least 6 microns. 20. The paperboard of claim 17 wherein said basis weight is at most Y5 pounds per 3000 ft2, wherein Y5 is calculated as follows: Y5=26.15+10.83X−0.06815X2.