Foodstuffs packaging containing a film with properties providing a barrier to mineral oils

Abstract

The present invention relates to foodstuffs packaging containing a polyolefin-based film with properties providing a barrier to mineral oils.

1 .- 24 . (canceled) 
     
     
         25 . A foodstuff packaging comprising:
 a) a foodstuff,   b) a polyolefin-based film which film encases the foodstuff,   c) a cardboard based on recycled cardboard, which encases the polyolefin-based film, in particular the film based on biaxially oriented polypropylene (boPP) films, containing the foodstuff,   wherein the polyolefin-based film comprises at least one coating comprising (i) acrylate polymer and/or (ii) halogen-containing vinyl polymers and/or vinylidene polymers and/or (iii) polymers based on vinyl alcohol (VOH), and the coating is present at least on the side of the film facing towards the cardboard based on recycled cardboard.   
     
     
         26 . The foodstuff packaging according to  claim 25 , wherein the film and/or the cardboard does not have any metallization preventing the migration of mineral oils into the packaged foodstuff). 
     
     
         27 . The foodstuff packaging according to  claim 25 , wherein the film is monolayered or multi-layered and comprises a base layer containing at least 70% by weight of the polyolefin in relation to the weight of the layer. 
     
     
         28 . The foodstuff packaging according to  claim 27 , wherein the polyolefin-based film is a film based on biaxially oriented polypropylene (boPP) films and the base layer contains 85 to 95% by weight, of the polyolefin, in each case in relation to the weight of the layer. 
     
     
         29 . The foodstuff packaging according to  claim 28 , wherein the film is monolayered and contains 90 to 100% by weight, of propylene polymers of which the melting point is 120° C. and which have a melt flow index from 1 to 10 g/10 min at 230° C. and a force of 21.6 N (DIN 53735). 
     
     
         30 . The foodstuff packaging according to  claim 25 , wherein the propylene polymer is a mixture of propylene homopolymers and/or copolymers and/or terpolymers and other polyolefins wherein the mixture contains at least 50% by weight of propylene polymer. 
     
     
         31 . The foodstuff packaging according  claim 25 , wherein the polyolefin film contains pigments in a quantity from 0.5 to 10% by weight. 
     
     
         32 . The foodstuff packaging according to  claim 25 , wherein the polyolefin-based film has a thickness from 20 to 100 μm. 
     
     
         33 . The foodstuff packaging according to  claim 25 , wherein the polyolefin-based film comprises, on one or both sides, an adhesion promoter made of polyethylene imine, to which the coating/s is/are applied. 
     
     
         34 . The foodstuff packaging according to  claim 34 , wherein the coating is present on both sides of the film. 
     
     
         35 . The foodstuff packaging according to  claim 25 , wherein the coating of the film on each side has in each case a total thickness between 0.4-5 μm. 
     
     
         36 . The foodstuff packaging according to  claim 35 , wherein the coating is multi-layered and, with a coating made of halogen-containing vinyl polymers and/or vinylidene polymers, initially has a secondary primer layer based on vinyl acetate/acrylate, and the layer thickness of the secondary primer layer comprises 50-100% of the layer thickness of the coating made of halogen-containing vinyl polymers and/or vinylidene polymers. 
     
     
         37 . The foodstuff packaging according to  claim 25 , wherein acrylate is an acrylate homopolymer and/or acrylate copolymer based on alkyl acrylates. 
     
     
         38 . The foodstuff packaging according to  claim 25 , wherein the halogen-containing vinyl polymer and/or vinylidene polymer is based on vinyl chloride and/or is vinyl chloride, which preferably comprises a copolymer based on vinyl acetate or acrylate. 
     
     
         39 . The foodstuff packaging according to  claim 25 , wherein the coating material made of a polymer based on vinyl alcohol (VOH) comprises a mixture of ethylene vinyl alcohol (EVOH) and polyvinyl alcohol, and said mixture comprising 5-15% by weight of a mixture of ethylene vinyl alcohol and polyvinyl alcohol, in the ratio 0.8-1.2 to 1.2-0.8 (ratios by weight). 
     
     
         40 . The foodstuff packaging according to  claim 25 , wherein the quantity of coating per side of the film (after drying) is between 0.5 and 1.0 g/m 2  for coating materials made of polymers based on vinyl alcohol (VOH), and the layer thickness is 1 to 1.5 μm (±0.2 μm). 
     
     
         41 . The foodstuff packaging according to  claim 25 , wherein the quantity of coating per side of the film after drying is between 0.5 and 1.5 g/m 2  for coating materials based on acrylate, and the layer thickness is 1 to 1.5 μm. 
     
     
         42 . The foodstuff packaging according to  claim 25 , wherein the quantity of coating per side of the film after drying is between 2.5 and 4 g/m 2  for coating materials based on halogen-containing vinyl polymers and/or vinylidene polymers, wherein the above quantity includes the secondary primer layer based on vinyl acetate/acrylate, and the layer thickness is 1.5 to 2.0 μm (±0.2 μm). 
     
     
         43 . The foodstuff packaging according to  claim 25 , wherein the recycled cardboard contains at least 300-1000 mg/kg mineral oil. 
     
     
         44 . The foodstuff packaging according to  claim 25 , wherein the film comprises a barrier for the mineral oils present in the recycled cardboard and at most 1%, of the MOSH 14-24 fraction present in the recycled cardboard diffuses into a foodstuff′ simulant when the proportion of the fraction MOSH 14-24 in the mineral oil of the recycled cardboard is at least 30% by weight. 
     
     
         45 . The foodstuff packaging according to  claim 25 , wherein the film comprises a barrier for the mineral oils present in the recycled cardboard and at most 1.6% of the MOSH 24-35 fraction present in the recycled cardboard diffuse into a foodstuff simulant when the proportion of the fraction MOSH 24-35 in the mineral oil of the recycled cardboard is at least 10% by weight. 
     
     
         46 . The foodstuff packaging according to  claim 25 , wherein the film comprises a barrier for the mineral oils present in the recycled cardboard and at most 0.5% of the MOAH 14-24 fraction present in the recycled cardboard diffuses into as foodstuff simulant when the proportion of the fraction MOAH 14-24 in the mineral oil of the recycled cardboard is at least 10% by weight. 
     
     
         47 . The foodstuff packaging according to  claim 25 , wherein the film comprises a barrier for the mineral oils present in the recycled cardboard and at most 3.5%, of the MOAH 24-35 fraction present in the recycled cardboard diffuse into a foodstuff simulant when the proportion of the fraction MOAH 24-35 in the mineral oil of the recycled cardboard is at least 1% by weight. 
     
     
         48 . The foodstuff packaging according to  claim 25 , wherein the foodstuffs packaging consists of the cardboard and the film and does not comprise any further metal layer.