Coated Paper

Abstract

The present disclosure provides a coated paper product comprising:—a paper substrate comprising a first and second side:—a first coating layer on the first side of the paper substrate, wherein the first coating layer comprises ethylene-acrylic acid (EAA) or vinyl acetate acrylate copolymer (VAcA) or styrene-acrylate (SA) or acrylic latex; and—a second coating layer on the first coating layer, wherein the second coating layer comprises EAA and talc, and wherein the dry weight ratio of EAA to tale in the second coating layer is between 100:5 and 100:70,—wherein the coat weight of the first coating layer is at least 4 g/m2, and—wherein the coat weight of the second coating layer is at least 3 g/m2.

1 . A coated paper product comprising:
 a paper substrate comprising a first and second side;   a first coating layer on the first side of the paper substrate, wherein the first coating layer comprises ethylene-acrylic acid (EAA) or vinyl acetate acrylate copolymer (VAcA) or styrene-acrylate (SA) or acrylic latex; and   a second coating layer on the first coating layer, wherein the second coating layer comprises EAA and talc, and wherein the dry weight ratio of EAA to talc in the second coating layer is between 100:5 and 100:70,   wherein the coat weight of the first coating layer is at least 4 g/m 2 , and   wherein the coat weight of the second coating layer is at least 3 g/m 2 .   
     
     
         2 . The coated paper product of  claim 1 , wherein the coat weight of the first coating layer is 4-10 g/m 2 . 
     
     
         3 . The coated paper product of  claim 1 , wherein the coat weight of the second coating layer is 3-9 g/m 2 . 
     
     
         4 . The coated paper product of  claim 1 , wherein the grammage measured according to ISO 536:2020 of the paper substrate is 40-135 g/m 2 . 
     
     
         5 . The coated paper product of  claim 1 , wherein the grammage measured according to ISO 536:2020 of the coated paper product is 52-142 g/m 2 . 
     
     
         6 . The coated paper product of  claim 1 , wherein the paper substrate is a machine-glazed (MG) kraft paper or a machine finished (MF) kraft paper. 
     
     
         7 . The coated paper product of claim  7 , wherein paper substrate is a MG paper and the first side of the paper substrate is the non-glazed side of the MG paper and wherein the glazed side is optionally printed. 
     
     
         8 . The coated paper product of  claim 1 , wherein at least 80 dry wt. % of the fibers used to form the paper substrate are never-dried. 
     
     
         9 . The coated paper product of  claim 1 , wherein the first coating layer comprises talc and/or calcium carbonate (CaCO 3 ). 
     
     
         10 . The coated paper product of  claim 9 , wherein the first coating layer comprises talc in a EAA or VAcA or SA or acrylic latex to talc ratio between 100:30 and 100:110. 
     
     
         11 . The coated paper product of  claim 1 , wherein the dry weight ratio of EAA to talc in the second coating layer is between 100:10 and 100:70. 
     
     
         12 . The coated paper product of  claim 1 , wherein the paper product is heat-sealable. 
     
     
         13 . The coated paper product of  claim 12 , wherein the maximum heat seal strength measured according to ASTM F88 & EN 868-5 of the coated paper product is at least 2.8 N measured on a 15 mm test strip sealed for 0.5 s at 160° C., and 3 bar. 
     
     
         14 . A flow-wrapped product obtained by flow-wrapping a product in a coated paper product according to  claim 1 , wherein the flow-wrapped product has a longitudinal fin seal and end fin seals. 
     
     
         15 . A sealed bag produced from a coated paper product according to  claim 1 , having a longitudinal seal and each end portion is sealed by a fin seal. 
     
     
         16 . (canceled) 
     
     
         17 . A method of producing a coated paper product comprising the steps of:
 providing a paper substrate comprising a first and second side; and   coating the first side of the paper substrate with a first coating layer, wherein the first coating layer comprises ethylene-acrylic acid (EAA) latex or vinyl acetate acrylate copolymer (VAcA) latex or styrene-acrylate (SA) latex or acrylic latex; and   coating a second coating layer on the first coating layer, wherein the second coating layer comprises ethylene-acrylic acid (EAA) latex and talc, and wherein the dry weight ratio of EAA latex to talc in the second coating layer is between 100:5 and 100:70,   wherein the coat weight of the first coating layer is at least 4 g/m 2 , and   wherein the coat weight of the second coating layer is at least 3 g/m 2 .   
     
     
         18 . The coated paper product of  claim 7 , wherein the glazed side is optionally printed. 
     
     
         19 . The sealed bag produced from a coated paper product of  claim 15 , wherein the bag is chosen from a gusseted bag or a pillow bag.