White Tinting File Folder

Abstract

A paper having thereon a coating composition including at least one pigment and at least one starch is provided. The pigment and the starch may be added to the surface of the paper at a size press during the formation of the paper in a ratio of at least 1:1. Papers coated with the coating composition have an enhanced surface ink density in a subsequent printing or tinting process at an ink usage that is equal or substantially equal to that used to tint conventional, uncoated papers. Accordingly, a paper coated with the coating composition requires the utilization of a lesser amount of ink than that required for conventional file folders to achieve the desired end color. In addition, the coating composition permits for an enhancement in print and/or tint quality if a reduction in ink use is not utilized. A method of forming a file folder is also provided.

1 . A white tinting file folder comprising:
 a paper web including cellulosic fibers, said paper web having a density from about 5 lb/3000 ft 2 /ml to about 15 lb/3000 ft 2 /ml and a caliper after calendaring from 3 to about 30 mils; and   a size-press applied coating composition at least substantially covering a first surface of said paper web, said coating composition including:
 a starch, and 
 a pigment, 
   wherein a weight ratio of said pigment to said starch is at least 1:4, and   wherein said paper web treated with said coating composition provides for a reduction of ink in a subsequent flexographic printing process in an amount up to about 13% compared to paper webs not treated with said coating composition.   
     
     
         2 . The file folder of  claim 1 , wherein said coating composition provides for up to a 7% enhancement in print density when applied at a size press. 
     
     
         3 . The file folder of  claim 1 , wherein said coating composition further includes a surface size, calcium chloride or combination thereof. 
     
     
         4 . The file folder of  claim 1 , wherein at least a portion of said coating composition penetrates the surface of said paper web. 
     
     
         5 . The file folder of  claim 4 , wherein said coating composition remains within 0.5 mm from said first surface of said paper web. 
     
     
         6 . The file folder of  claim 1 , wherein said pigment is selected from calcium carbonate, ground calcium carbonate, kaolin, hydrous kaolin, calcined clays, bentonite, calcium sulphate, barium sulfate, silicas, silicates, titania, titanium dioxide, alumina, hydrated ammonium silicates, aluminum trihydrate, satin white, talc, barium sulphate, zinc oxide, mica, dolomite and mixtures thereof. 
     
     
         7 . The file folder of  claim 6 , wherein said starch is selected from cereal starches, root or tuber starches, fruit starches and waxy or high amylase variants thereof. 
     
     
         8 . The file folder of  claim 1 , wherein said pigment is ground calcium carbonate and said starch is an ethylated starch. 
     
     
         9 . A paperboard comprising:
 cellulosic fibers forming a web, said web having a first major surface and a second major surface; and   a coating composition at least substantially covering said first major surface, said coating composition including:
 a starch, and 
 a pigment, 
   wherein a weight ratio of said pigment to said starch is at least 1:1,   wherein at least a portion of said coating composition penetrates said first surface of said web, and   wherein said coating composition provides for up to a 7% enhancement in print density when applied at a size press.   
     
     
         10 . The paperboard of  claim 9 , wherein said coating composition further includes a surface size, calcium chloride and combinations thereof. 
     
     
         11 . The paperboard of  claim 9 , wherein said web treated with said coating composition provides for a reduction of ink in a subsequent flexographic printing process in an amount up to about 13% compared to webs not treated with said coating composition. 
     
     
         12 . The paperboard of  claim 9 , wherein said pigment is selected from calcium carbonate, ground calcium carbonate, kaolin, hydrous kaolin, calcined clays, bentonite, calcium sulphate, barium sulfate, silicas, silicates, titania, titanium dioxide, alumina, hydrated ammonium silicates, aluminum trihydrate, satin white, talc, barium sulphate, zinc oxide, mica, dolomite and mixtures thereof. 
     
     
         13 . The paperboard of  claim 12 , wherein said starch is selected from cereal starches, root or tuber starches, fruit starches and waxy or high amylase variants thereof. 
     
     
         14 . The paperboard of  claim 9 , wherein said weight ratio of said pigment to said starch ranges from 4:1 to 1:4. 
     
     
         15 . A method of forming a file folder comprising:
 providing a papermaking furnish including cellulosic fibers;   forming a fibrous web from said papermaking furnish;   drying said fibrous web;   treating at least a first surface of said fibrous web with a coating composition to form a coated web, said coating composition including:
 a starch; and 
 a pigment, 
 wherein a weight ratio of said pigment to said starch is at least 1:1, and 
 wherein said fibrous web treated with said coating composition provides for a reduction of ink in a subsequent flexographic printing process in an amount up to about 13% compared to fibrous webs not treated with said coating composition; and 
   cutting said coated web into a desired shape for form a file folder.   
     
     
         16 . The method of  claim 16 , wherein greater than 50% of said coating composition is located on said first surface of said fibrous web. 
     
     
         17 . The method of  claim 15 , wherein said coating composition further includes a member selected from a surface size, calcium chloride and mixtures thereof. 
     
     
         18 . The method of  claim 17 , wherein said coating composition provides for up to a 7% enhancement in print density when applied at a size press. 
     
     
         19 . The method of  claim 17 , wherein said pigment is selected from calcium carbonate, ground calcium carbonate, kaolin, hydrous kaolin, calcined clays, bentonite, calcium sulphate, barium sulfate, silicas, silicates, titania, titanium dioxide, alumina, hydrated ammonium silicates, aluminum trihydrate, satin white, talc, barium sulphate, zinc oxide, mica, dolomite and mixtures thereof. 
     
     
         20 . The method of  claim 19 , wherein said starch is selected from cereal starches, root or tuber starches, fruit starches and waxy or high amylase variants thereof.