A packaging material comprising a plastic substrate comprising at least one surface, and a barrier layer for hydrophobic substances, wherein the barrier layer is in contact with the at least one surface of the plastic substrate, wherein the barrier layer has a layer weight of at least 2 g/m 2, and wherein the barrier layer comprises a copolymer obtainable by emulsion polymerization of (i) one or more principal monomers selected from the group consisting of C 1 -C 4 alkyl (meth)acrylates, and (ii) 0.1 to 5 wt.-% of one or more acid monomers, based on the total weight of all monomers, wherein the glass transition temperature T g of the copolymer is from -10 to 70°C, measured using Differential Scanning Calorimetry and the method according to ASTM E1356, and the emulsion polymerization is carried out in an aqueous medium in the presence of at least one carbohydrate compound, a surface-reacted calcium carbonate, wherein the surface-reacted calcium carbonate is a reaction product of natural ground calcium carbonate or precipitated calcium carbonate with carbon dioxide and one or more H 3 O + ion donors, wherein the carbon dioxide is formed in situ by the H 3 O + ion donors treatment and/or is supplied from an external source, and a mineral material selected from natural ground calcium carbonate and/or precipitated calcium carbonate, wherein the weight ratio of the surface-reacted calcium carbonate to the mineral material is from 1:10 to 1:0.01. a plastic substrate comprising at least one surface, and a barrier layer for hydrophobic substances, wherein the barrier layer is in contact with the at least one surface of the plastic substrate, wherein the barrier layer has a layer weight of at least 2 g/m 2, and wherein the barrier layer comprises a copolymer obtainable by emulsion polymerization of (i) one or more principal monomers selected from the group consisting of C 1 -C 4 alkyl (meth)acrylates, and (ii) 0.1 to 5 wt.-% of one or more acid monomers, based on the total weight of all monomers, wherein the glass transition temperature T g of the copolymer is from -10 to 70°C, measured using Differential Scanning Calorimetry and the method according to ASTM E1356, and the emulsion polymerization is carried out in an aqueous medium in the presence of at least one carbohydrate compound, a surface-reacted calcium carbonate, wherein the surface-reacted calcium carbonate is a reaction product of natural ground calcium carbonate or precipitated calcium carbonate with carbon dioxide and one or more H 3 O + ion donors, wherein the carbon dioxide is formed in situ by the H 3 O + ion donors treatment and/or is supplied from an external source, and a mineral material selected from natural ground calcium carbonate and/or precipitated calcium carbonate, wherein the weight ratio of the surface-reacted calcium carbonate to the mineral material is from 1:10 to 1:0.01. a copolymer obtainable by emulsion polymerization of (i) one or more principal monomers selected from the group consisting of C 1 -C 4 alkyl (meth)acrylates, and (ii) 0.1 to 5 wt.-% of one or more acid monomers, based on the total weight of all monomers, wherein the glass transition temperature T g of the copolymer is from -10 to 70°C, measured using Differential Scanning Calorimetry and the method according to ASTM E1356, and the emulsion polymerization is carried out in an aqueous medium in the presence of at least one carbohydrate compound, (i) one or more principal monomers selected from the group consisting of C 1 -C 4 alkyl (meth)acrylates, and (ii) 0.1 to 5 wt.-% of one or more acid monomers, based on the total weight of all monomers, a surface-reacted calcium carbonate, wherein the surface-reacted calcium carbonate is a reaction product of natural ground calcium carbonate or precipitated calcium carbonate with carbon dioxide and one or more H 3 O + ion donors, wherein the carbon dioxide is formed in situ by the H 3 O + ion donors treatment and/or is supplied from an external source, and a mineral material selected from natural ground calcium carbonate and/or precipitated calcium carbonate,