A barrier multilayer packaging material structure being formed as a semi-rigid or rigid unitary sheet and comprising from its outer surface to its inner surface, the following layers: (i) at least one layer of a polymer dispersion coating selected within the list of: ethylene-acrylic or methacrylic acid copolymer, vinyl acetate, styrene acrylate, acrylic, modified polyvinylalcohol, ethyl acetate, polyhydroxyalcanoate and their copolymers, polyurethane, polybutylene adipate terephthalate (PBAT), polybutylene succinate, poly(butylene succinate-co-adipate) (PBSA), polylactic acid, or any mixture thereof, with or without a mineral filler, said coating having a thickness of 1 to 10 μm, (ii) a semi-rigid or rigid paperboard having a grammage of between 120 g/m 2 and 500 g/m 2, (iii) a layer of water-based or solvent-less adhesive selected within the list of: polyvinylacetate (PVAc), polyurethane, acrylic, polyvinylalcohol (PVOH), ethylenevinylalcohol (EVOH), butenediol vinyl alcohol co-polymer (BVOH), a starch-based adhesive, or a mixture thereof, said adhesive layer having a thickness comprised between 1 μm and 10 μm, (iv) at least one layer of a protective coating selected within the list of: polyvinylalcohol (PVOH), ethylene ethyl acrylate, or polyurethane, said protective coating having a thickness comprised between 1 μm and 10 μm, (v) a layer of aluminum having an optical density equivalent of 2-5, or aluminium oxide, or silicon oxide, applied with physical or chemical vapor deposition process, or with transfer metallization, (vi) a release coating selected within the list of: vinyl chloride, acrylic polymer, polyurethane, nitrocellulose, or a mixture thereof, said release coating having a thickness of 0.1 μm to 4 μm, (vii) at least one layer of a water-resistant polyolefin sealable coating of any of the following: low density polyethylene (LDPE), linear low-density polyethylene (LLDPE), or an ethyl-acrylate blend with low density polyethylene (EEA-LDPE), said coating having a thickness of 10 to 50 μm, preferably of 25 to 35 μm, wherein the total fiber contents of said structure is comprised between 90% and 96% by weight. (i) at least one layer of a polymer dispersion coating selected within the list of: ethylene-acrylic or methacrylic acid copolymer, vinyl acetate, styrene acrylate, acrylic, modified polyvinylalcohol, ethyl acetate, polyhydroxyalcanoate and their copolymers, polyurethane, polybutylene adipate terephthalate (PBAT), polybutylene succinate, poly(butylene succinate-co-adipate) (PBSA), polylactic acid, or any mixture thereof, with or without a mineral filler, said coating having a thickness of 1 to 10 μm, (ii) a semi-rigid or rigid paperboard having a grammage of between 120 g/m 2 and 500 g/m 2, (iii) a layer of water-based or solvent-less adhesive selected within the list of: polyvinylacetate (PVAc), polyurethane, acrylic, polyvinylalcohol (PVOH), ethylenevinylalcohol (EVOH), butenediol vinyl alcohol co-polymer (BVOH), a starch-based adhesive, or a mixture thereof, said adhesive layer having a thickness comprised between 1 μm and 10 μm, (iv) at least one layer of a protective coating selected within the list of: polyvinylalcohol (PVOH), ethylene ethyl acrylate, or polyurethane, said protective coating having a thickness comprised between 1 μm and 10 μm, (v) a layer of aluminum having an optical density equivalent of 2-5, or aluminium oxide, or silicon oxide, applied with physical or chemical vapor deposition process, or with transfer metallization, (vi) a release coating selected within the list of: vinyl chloride, acrylic polymer, polyurethane, nitrocellulose, or a mixture thereof, said release coating having a thickness of 0.1 μm to 4 μm, (vii) at least one layer of a water-resistant polyolefin sealable coating of any of the following: low density polyethylene (LDPE), linear low-density polyethylene (LLDPE), or an ethyl-acrylate blend with low density polyethylene (EEA-LDPE), said coating having a thickness of 10 to 50 μm, preferably of 25 to 35 μm,