Sustainable barrier containers and methods

A method of making a packaging structure or formable sheet comprising:

• co-extruding a first layer which comprises post-consumer resin and a second layer which comprises an alloy of:
• polyethylene terephthalate;
• a polyolefin;
• and
• at least one compatibilizer, to form a co-extrudate;
• melt adhering the co-extrudate to a third layer which comprises an alloy of:
• polyethylene terephthalate;
• a polyolefin;
• and
• at least one compatibilizer, to form a melt-adhered sheet;
• intermixing a solution of polyethyleneimine, polyvinyl alcohol, and water to form a coating;
• applying the coating to the third layer of the melt-adhered sheet opposite the first layer and second layer;
• drying the applied coating;
• and
• applying an overlacquer to the dried coating.

A method of making a packaging structure or formable sheet comprising:

• intermixing a solution of polyethyleneimine, polyvinyl alcohol, and water to form a coating;
• applying the coating to a first layer which comprises an alloy of:
• polyethylene terephthalate;
• a polyolefin;
• and
• at least one compatibilizer, to form a coated first layer;
• drying the applied coating;
• co-extruding a second layer which comprises post-consumer resin and a third layer which comprises an alloy of:
• polyethylene terephthalate;
• a polyolefin;
• and
• at least one compatibilizer, to form a co-extrudate;
• and
• melt adhering the co-extrudate to the coated first layer such that the coating is disposed between the third layer and the first layer.