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 , 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 , 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. <EOS>