Abstract: The present development is a process for coating a substrate with a microlayered extrusion coating, or for producing a laminate from a first substrate, a microlayered extrudate and a second substrate. The present development also includes a microlayered extrusion coating used for laminating two or more plastic extrudates. The microlayered extrusion coating comprises a microlayer core comprising a plurality of layers of gas barrier material having a thickness of less than five microns per layer with alternating tie layers. The microlayer core is sandwiched between polymeric boundary layers which are further sandwiched between polymeric skin layers. The present microlayered extrudate surprisingly exhibits a gas barrier significantly better than conventional thicker single barrier layers and increased opacity in the extrudate using white pigmented LDPE enhances the printed graphics in a laminate structure using a printed substrate.