Patent ID: 8658272
Filing Date: 2014-02-25
Classification: C01P,C09C,D21H,Y10T

Abstract:
1. A paperboard structure comprising: a paperboard substrate formed as a web of fibers defining a plurality of pits in a surface thereof; and a basecoat substantially received within said plurality of said pits without substantially completely covering said surface, wherein said basecoat comprises a pigment blend including a calcined clay component and a hyper-platy clay component, wherein said hyper-platy clay component has a shape factor of at least about 40:1, and wherein said pigment blend has a sediment void volume of at least about 50 percent when measured by a technique involving diluting said pigment blend with water to 50% by weight solids, centrifuging a 70 gram sample of the resulting slurry at 8000 g for 90 minutes and calculating the volume of water remaining in the voids of the sediment after pouring off and weighing the supernatant liquid.