Multilayer plastic film, in particular multilayer plastic composite film, based on plastic recyclate (recycled plastic) and having barrier layer properties to water vapor and/or gases, wherein the multilayer plastic film comprises a layered composite of several, in particular at least three, interconnected layers (1a, 1b, 1c), wherein the multilayer plastic film comprises a first outer film and a second outer film and a metal layer arranged between the first outer film and the second outer film, wherein the multilayer plastic film has a plastic recyclate content of at least 80 % by weight based on the multilayer plastic film, wherein the multilayer plastic film comprises at least substantially only one single plastic grade according to DIN EN ISO 11469, said plastic grade having a grade purity of at least 90 % by weight, based on the plastic content of the multilayer plastic film, wherein the first outer film comprises a laminate of at least three film layers (1a 1, 1a 2, 1a 3) bonded to one another, in particular bonded and/or coextruded by means of coextrusion, wherein the second outer film comprises a layer composite of at least three film layers (1c 1, 1c 2, 1c 3) bonded to one another, in particular bonded and/or coextruded by means of coextrusion, or is in the form of a single-layer film, wherein the metal layer is applied to the inner side of the first outer film and/or to the side of the first outer film facing the second outer film and/or is attached thereto, wherein the metal layer is produced by means of metallization and/or thin-film techniques (thin-layer techniques), preferably by means of gas phase deposition, and wherein the metal layer is formed with a layer thickness in the range from 0.001 μm to 50 μm. wherein the multilayer plastic film comprises a layered composite of several, in particular at least three, interconnected layers (1a, 1b, 1c), wherein the multilayer plastic film comprises a first outer film and a second outer film and a metal layer arranged between the first outer film and the second outer film, wherein the multilayer plastic film has a plastic recyclate content of at least 80 % by weight based on the multilayer plastic film, wherein the multilayer plastic film comprises at least substantially only one single plastic grade according to DIN EN ISO 11469, said plastic grade having a grade purity of at least 90 % by weight, based on the plastic content of the multilayer plastic film, wherein the first outer film comprises a laminate of at least three film layers (1a 1, 1a 2, 1a 3) bonded to one another, in particular bonded and/or coextruded by means of coextrusion, wherein the second outer film comprises a layer composite of at least three film layers (1c 1, 1c 2, 1c 3) bonded to one another, in particular bonded and/or coextruded by means of coextrusion, or is in the form of a single-layer film, wherein the metal layer is applied to the inner side of the first outer film and/or to the side of the first outer film facing the second outer film and/or is attached thereto, wherein the metal layer is produced by means of metallization and/or thin-film techniques (thin-layer techniques), preferably by means of gas phase deposition, and wherein the metal layer is formed with a layer thickness in the range from 0.001 μm to 50 μm.