Laminated board for enhanced graphics packaging and strength

Abstract

The invention relates to a laminated board grade structure used for low cost, enhanced graphics packaging. The product contains an unbleached or bleached substrate board and pigmented opaque polymer film applied to the unbleached board substrate to produce a product with a smooth coated, glossy surface for quality graphics printing.

What is claimed is:  
     
         1 . A laminated board structure for enhanced graphics packaging comprising: 
 a paperboard substrate; and    a pigmented opaque polymer film applied directly to the substrate board.    
     
     
         2 . The laminated board structure as claimed in  claim 1 , wherein the board structure yields a Sheffield smoothness of 100-350 SU and a final Parker print surface smoothness from 1.5-4.0 microns when measured using a pressure of 10 kgf/cm 2 .  
     
     
         3 . The laminated board structure as claimed in  claim 1 , wherein the board structure yields a GE brightness of 60-90 and a 75° gloss level of 35-75%.  
     
     
         4 . The laminated board structure as claimed in  claim 1 , wherein the board structure yields 70-160 ft-lbf. of internal bond strength.  
     
     
         5 . The laminated board structure as claimed in  claim 1 , wherein the pigmented opaque polymer film is applied to the substrate board by extrusion, or by hot melt adhesion.  
     
     
         6 . The laminated board structure as claimed in  claim 1 , wherein the paperboard substrate has a thickness ranging from 7 to 30 mils and a basis weight range of 25-96 lbs./1000 sq. ft.  
     
     
         7 . The laminated board structure as claimed in  claim 1 , wherein the paperboard substrate has a Sheffield smoothness of 200-400 SU and Parker print surface smoothness of less than 12 microns when measured using a pressure of 10 kgf/cm 2 .  
     
     
         8 . The laminated board structure as claimed in  claim 1 , wherein the paperboard substrate is a multi-ply white top linerboard or a mottled white linerboard for improved opacity and/or whiteness in the final structure.  
     
     
         9 . The laminated board structure as claimed in  claim 1 , wherein the polymer pigmented opaque is repulpable and/or biodegradable for improved recycling or environmental degradation.  
     
     
         10 . The laminated board structure as claimed in  claim 1 , wherein the pigmented opaque polymer film layer is pigmented by titanium dioxide, calcium carbonate, talc, clay, pearlescent pigments, colored pigments or combinations thereof.  
     
     
         11 . The laminated board substrate as claimed in  claim 1 , wherein a coat weight of the pigmented opaque polymer film layer applied by extrusion ranges from 9-35 lbs./3,000 sq. ft.  
     
     
         12 . The laminated board substrate as claimed in  claim 1 , wherein a coat weight of the hot melt applied pigmented opaque polymer film layer ranges from 3-10 lbs./3,000 sq. ft.