Noise-Reducing Extrusion Coating Compositions

Abstract

Methods for extrusion coating a substrate are provided. The methods comprise applying an extrusion coating composition to a surface of a substrate by extrusion coating. In these methods, the extrusion coating composition includes a polyolefin and an inorganic particulate material having an average particle size of no greater than 2 μm and a particle loading of at least 20 weight percent, based on the total weight of polyolefin and the inorganic particulate material.

1 - 10 . (canceled) 
     
     
         11 . A coated substrate comprising:
 (a) a substrate; and   (b) a coating composition coated on a surface of the substrate, the coating composition comprising:
 (i) a polyolefin; and 
 (ii) an inorganic particulate material having an average particle size of no greater than 1.5 μm and a particle loading of at least 25 weight percent, based on the total weight of the polyolefin and the inorganic particulate material. 
   
     
     
         12 . The coated substrate of  claim 11  in which the substrate comprises a paper product. 
     
     
         13 . The coated substrate of  claim 11  in which the polyolefin is one or more ethylene-based polymers having a density of no greater than 0.940 g/cc and selected from the group consisting of polyethylene homopolymers and polyethylene copolymers prepared from only two different monomers. 
     
     
         14 . The coated substrate of  claim 13 , wherein the coating composition consists essentially of the polyolefin and inorganic particulate material. 
     
     
         15 . The coated substrate of  claim 11  in which the inorganic particulate material has a particle loading of at least 30 weight percent, based on the total weight of the polyolefin and the inorganic particulate material. 
     
     
         16 . The coated substrate of  claim 11  in which the polyolefin comprises a polyethylene or polyethylene interpolymer having a density of no greater than 0.940 g/cc and the inorganic particulate material comprises a mineral. 
     
     
         17 . The coated substrate of  claim 11 , further comprising one or more additional coating layers disposed between the substrate and the coating composition. 
     
     
         18 . The coated substrate of  claim 11 , wherein the inorganic particulate material is calcium carbonate.