Packaging and lidding material

Abstract

Packaging or lidding material containing at least two layers of material, and between the two layers hidden information in the form of a printed image viz., information that is visible only after peeling the first layer from the second layer. The packaging material serves the manufacture of film-type packaging or parts thereof, or as lidding material for containers. The packaging or lidding material of a packaging unit contains the following sequence of layers: a) a first layer of material, b) a printed pattern or image, the limits of which lie within the dimensions of the package in question or the lid of the packaging unit, c) a dividing layer, the dimensions of which are the same or greater than the printed image b) and smaller than the dimensions of the packaging or lid of the package, d) an adhesive layer covering the whole of the surface, e) a second layer of material, where the printed image b) can be made visible by lifting the first layer of material a) from the second layer of material e).

1 . Packaging material in the form of film for manufacturing forms of packaging or parts thereof, or lidding material for containers, containing at least two layers of material, characterised in that, the packaging or lidding material of a packaging contains the following sequence of material layers: 
 a) a first layer of material,    b) a printed image or pattern, the limits of which lie within the dimensions of the package in question or the lid thereof,    c) a dividing layer, the dimensions of which are the same or greater than the printed image b) and smaller than the dimensions of the packaging or lid of the package,    d) an adhesive layer covering the whole of the surface,    e) a second layer of material, where the printed image b) can be made visible by lifting the first layer of material a) from the second layer of material e).    
     
     
         2 . Packaging or lidding material according to    claim 1   , characterised in that the first layer a) exhibits printing on one or both sides and/or a metallised coating on one or both sides.  
     
     
         3 . Packaging or lidding material according to    claim 1   , characterised in that the first layer a) and the second layer e), independent of each other, contain a paper, a plastic film or a metal foil or are a composite containing at least one of these materials.  
     
     
         4 . Packaging or lidding material according to    claim 1   , characterised in that the printed image b) comprises figure-like or abstract graphic patterns, numbers, letters and/or figures in one or more printing colours.  
     
     
         5 . Packaging or lidding material according to    claim 1   , characterised in that the separating layer c) is a layer that does not adhere to the adhesive layer d).  
     
     
         6 . Packaging or lidding material according to    claim 1   , characterised in that the adhesive layer d) is present in an amount of 0.9 to 12 g/m 2 , and bonds to the layers a) and e).  
     
     
         7 . Packaging or lidding material according to    claim 1   , characterised in that the second layer e) contains a paper, a plastic film or a metal foil or is a composite containing at least one of these materials.  
     
     
         8 . Packaging or lidding material according to    claim 1   , characterised in that a sealing layer f) is provided on layer e) facing outwards.  
     
     
         9 . Packaging or lidding material according to    claim 1   , characterised in that the packaging and lidding material exhibits the following sequence of layers: 
 a) a plastic film based on oriented polypropylene, having a thickness of 18 to 22 μm or of polyethylene-terephthalate of thickness 10 to 15 m,    b) a printed image    c) a separating layer    d) an adhesive layer covering the whole surface    e) a plastic film based on polyethylene-terephthalate of thickness 6 to 36 μm, which is metallised to a thickness of 10 to 60 nm (nanometer) on the side facing the adhesive layer d).    
     
     
         10 . Packaging or lidding material according to    claim 1   , characterised in that the packaging and lidding material exhibits the following sequence of layers: 
 a 0 ) printing    a) plastic film based on oriented polypropylene of thickness 18 to 22 μm or of polyethylene-terephthalate of thickness 10 to 15 μm    a 1 ) a metallised layer of thickness 10 to 60 nm    b) a printed image,    c) a separating layer    d) an adhesive layer covering the whole surface    e) a paper having a weight per unit area of 15 to 40 g/m 2      e 1 ) a non-adhesive coating as moisture barrier, usefully 0.5 to 5 g/m 2  of an organic coating, or usefully 2 to 20 g/m 2  of paraffin, wax or hot-melt.    
     
     
         11 . Packaging or lidding material according to    claim 1   , characterised in that the packaging and lidding material exhibits the following sequence of layers: 
 a 0 ) printing,    a) a paper having a weight per unit area of 15 to 40 g/m 2      a 1 ) a metallised layer of thickness 10 to 60 nm    b) a printed image    c) a separating layer    d) an adhesive layer covering the whole surface    e) a plastic film based on polyethylene-terephthalate of thickness 6 to 36 μm which is metallised on the side facing the adhesive layer d) to a thickness of 10 to 60 nm.    
     
     
         12 . Process for manufacturing packaging or lidding material for the manufacture of packaging units or parts thereof, or lidding material for containers, according to    claim 1   , containing at least two layers, characterised in that, 
 a printed image b), the limits of which lie within the dimensions of the packaging unit is deposited    on one side of a printed or non-printed, metallised or non-metallised first layer a),    on top of that is deposited a separating layer c) the dimensions of which are the same or greater than the printed image b) and smaller than the limiting dimensions of the packaging unit and,    a second layer e) is deposited on layer a), on the free side of the separating layer c),    an adhesive layer d) covering the surface area completely being deposited between the first layer a) and the second layer e).    
     
     
         13 . Process according to    claim 12   , characterised in that the separating layer c) is deposited using a printing process.  
     
     
         14 . Use of the packaging material in film form or the lidding material for containers according to    claim 1   , as packaging unit or for parts thereof in the form of boxes, collapsible boxes, film-type packaging, pouches, bags, sachets, bins, wraps and coverings or lidding material for lids for beakers, goblets, dishes, menu dishes, pots or glasses or as stamps or sealing strips.