Packaging material having moisture barrier and methods for preparing same

摘要

An article in the form of a packaging material having a water vapor transportation rate of about 500 g/m2/day or less. The packaging material has a paper substrate and a print-receptive layer which is positioned over the outer surface of the paper substrate. The packaging material also has a moisture barrier layer positioned over the print-receptive layer. The moisture barrier layer is formed from one or more energy-cured polymers. Also, methods for preparing these packaging materials, including printed packaging materials.

主权项

1. An article comprising a packaging material comprising:
a paper substrate comprising at least about 40% pulp fibers selected from the group consisting of softwood fibers, hardwood fibers and mixtures of softwood and hardwood fibers, the paper substrate having an inner surface and an outer surface; a print-receptive layer having an inner surface and an outer surface, wherein the inner surface of the print-receptive layer is positioned over the outer surface of the paper substrate and wherein the outer surface of the print-receptive layer has a Parker Print Smoothness value of about 1.5 or less and one or more printed areas disposed thereon; a moisture barrier layer comprising one or more energy-cured polymers obtained by curing one or more of the following energy-curable monomers: trimethylolpropane ethoxy triacrylate, epoxy acrylate oligomers, or tripropylene glycol diacrylate, the moisture barrier layer being positioned over the outer surface of the print-receptive layer and over the one or more printed areas, wherein the packaging material has a water vapor transportation rate of about 500 g/m2/day or less; a moisture barrier reinforcing layer comprising a polyolefin, the moisture barrier reinforcing layer being positioned over the inner surface of the paper substrate; and a curl control layer positioned between the inner surface of the paper substrate and the moisture barrier reinforcing layer.