Metallized packaging films from recycled plastics
AssigneeKBG Kunststoff Beteiligungen GmbH
InventorFrank Rieker
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Abstract
The invention relates to a multilayer plastic film, in particular a multilayer plastic composite film, preferably a multilayer plastic packaging film, based on plastic recyclate (recycled plastic), in particular based on plastic recyclate originating from waste, with a plastic recyclate content of at least 80 wt. %, based on the plastic film, and with barrier layer properties (barrier properties) to water vapor and/or gases (preferably oxygen), preferably with barrier layer properties (barrier properties) to water vapor and gases (preferably oxygen), and the use of this multilayer plastic film, in particular as packaging material. The plastic recyclate is preferably post-consumer plastic recyclate (PCR plastic recyclate), in particular PCR recycled films.
Claims26
A multilayer plastic composite film based on a plastic recyclate (recycled plastic) and having barrier layer properties to at least one of water vapor and gases,
- wherein the multilayer plastic composite film comprises a layered composite of several layers bonded to one another, comprising 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 composite film has a plastic recyclate content of at least 80% by weight based on the multilayer plastic composite film;
- wherein the multilayer plastic composite 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 composite film;
- wherein the first outer film comprises a laminate of at least three film layers bonded to one another by means of coextrusion,
- wherein the second outer film comprises a layer composite of at least three film layers bonded to one another by means of coextrusion or is in the form of a single-layer film, and
- wherein the metal layer is applied to the inner side of the first outer film facing the second outer film and is attached thereto, wherein the metal layer is generated by means of metallization or thin-film techniques and has a layer thickness in the range from 0.001 μm to 50 μm.
A multilayer plastic composite film based on a plastic recyclate (recycled plastic) and having barrier layer properties to at least one of water vapor and gases,
- wherein the multilayer plastic composite film comprises a layered composite of several layers bonded to one another, comprising 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 composite film has a plastic recyclate content of at least 80% by weight based on the multilayer plastic composite film;
- wherein the multilayer plastic composite 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 composite film;
- wherein the first outer film comprises a laminate of at least three film layers bonded to one another by means of coextrusion,
- wherein the second outer film comprises a layer composite of at least three film layers bonded to one another by means of coextrusion or is in the form of a single-layer film, and
- wherein the metal layer is applied to the inner side of the first outer film facing the second outer film and is attached thereto, wherein the metal layer is generated by means of metallization or thin-film techniques and has a layer thickness in the range from 0.001 μm to 50 μm;
- wherein the metal layer is present in a proportion in the range from 0.05% by weight to 20% by weight, relative to the multilayer plastic composite film, and
- wherein the metal layer is formed as an aluminum layer.
A packaging material comprising at least one multilayer plastic composite film based on a plastic recyclate (recycled plastic) and having barrier layer properties to at least one of water vapor and gases,
- wherein the multilayer plastic composite film comprises a layered composite of several layers bonded to one another, comprising
- 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 composite film has a plastic recyclate content of at least 80% by weight based on the multilayer plastic composite film;
- wherein the multilayer plastic composite 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 composite film;
- wherein the first outer film comprises a laminate of at least three film layers bonded to one another by means of coextrusion,
- wherein the second outer film comprises a layer composite of at least three film layers bonded to one another by means of coextrusion or is in the form of a single-layer film, and
- wherein the metal layer is applied to the inner side of the first outer film facing the second outer film and is attached thereto, wherein the metal layer is generated by means of metallization or thin-film techniques and has a layer thickness in the range from 0.001 μm to 50 μm.
Dependencies are inferred from the claim text.