Coated paper-based substrate for containers and process for making the same

A process for preparing a coated paper-based substrate for manufacturing a container, wherein the coated paper-based substrate comprises a cellulosic fiber-based substrate coated on a first surface with a coating A forming an interior coating and coated on a second surface with a coating B forming an exterior coating providing a water and/or moisture barrier to the second surface of the paper-based substrate, and wherein

• the coating A comprises at least one layer of an extruded or laminated polymeric film or of a laminated foil;
• the coating B comprises at least one layer of at least one polymer or copolymer;
• the extruded or laminated polymeric film and the polymer or copolymer of the aqueous dispersion are different;
• and
• the coating A and the coating B are heat sealable to each other;
• the process comprising:
• applying an aqueous dispersion of the at least one polymer or copolymer;
• drying the aqueous dispersion to form the at least one layer of the polymer or copolymer;
• and
• applying by extrusion or lamination the layer of the polymeric film or laminating the foil on the first surface of the paper-based substrate.