Packaging laminate and packaging container

Abstract

The disclosure relates to a packaging laminate ( 10 ) for a packaging container for a food product intended to be frozen, comprising a core layer ( 12 ) and outer, liquid-tight layers ( 14, 16 ), the packaging laminate ( 10 ) including an outer, thermosealable layer ( 14, 14 a ) which, at least in selected part regions thereof displays a brittle point between −25° C. and +20° C. The invention also relates to a packaging container ( 30 ) for a food product intended to be frozen, which is formed from the packaging laminate according to the present invention.

1 . A packaging container for a food product intended to be frozen, formed from a packaging laminate comprising a core layer and outer, liquid-tight layers, wherein the packaging laminate displays an outer, thermosealable layer which, at least in selected part regions thereof, displays a brittle point between −25° C. and +20° C., wherein said outer, thermosealable layer includes a polymer material which displays said brittle point, the polymer material including at least one brittle point-lowering polymer consisting of polypropylene, and wherein the polymer material also includes polyethylene,
 wherein the packaging container is formed with a sealing fin, a free edge of the sealing fin faces out from the packaging container, and the packaging container tapers cuneiformly towards the sealing fin.   
   
   
       2 . The packaging container as claimed in  claim 1 , wherein said brittle point is −20° C. to +17° C. 
   
   
       3 . The packaging container as claimed in  claim 1 , wherein said brittle point is −20° C. to +8° C. 
   
   
       4 . The packaging container as claimed in  claim 1 , wherein said polyethylene and said brittle point-lowering polymer are present as a copolymer. 
   
   
       5 . The packaging container as claimed in  claim 4 , wherein said brittle point-lowering polymer is present in a quantity of up to 40 weight % in said polymer material. 
   
   
       6 . The packaging container as claimed in  claim 1 , wherein said outer, thermosealable layer displays a layer thickness of 2-50 μm. 
   
   
       7 . The packaging container as claimed in  claim 6 , wherein said outer, thermosealable layer displays a layer thickness of 2-15 μm. 
   
   
       8 . The packaging container as claimed in  claim 1 , wherein said outer, thermosealable layer displays a layer thickness of 15-50 μm. 
   
   
       9 . The packaging container as claimed in  claim 1 , wherein said core layer consists of polymer material, paper or paperboard, and wherein a barrier layer is disposed between the core layer and one of the outer, liquid-tight layers. 
   
   
       10 . The packaging container as claimed in  claim 1 , wherein on its opposite side to said outer, thermosealable layer, it displays a second outer, thermosealable layer which consists of polyethylene or of a thermosealable layer which at least in selected part regions thereof displays said brittle point. 
   
   
       11 . The packaging container as claimed in  claim 1 , wherein all polymer layers included in the packaging laminate, at least in selected part regions thereof, display said brittle point. 
   
   
       12 . The packaging container as claimed in  claim 1 , wherein said food product is substantially liquiform in the unfrozen state, but substantially solid in the frozen state. 
   
   
       13 . The packaging container as claimed in  claim 1 , wherein it displays a seal in which said outer, thermosealable layer directly abuts and is sealed to itself in a so-called praying seal. 
   
   
       14 . The packaging container as claimed in  claim 13 , wherein said seal displays an active sealing width of 0.3-5 mm. 
   
   
       15 . The packaging container as claimed in  claim 13 , wherein the container is tetrahedral in configuration. 
   
   
       16 . The packaging container as claimed in  claim 2 , wherein said brittle point is −15° C. to +15° C. 
   
   
       17 . The packaging container as claimed in  claim 2 , wherein said brittle point is −10° C. to +12° C. 
   
   
       18 . The packaging container as claimed in  claim 3 , wherein said brittle point is −15° C. to +4° C. 
   
   
       19 . The packaging container as claimed in  claim 3 , wherein said brittle point is −10° C. to +2° C. 
   
   
       20 . The packaging container as claimed in  claim 5 , wherein said brittle point-lowering polymer is present in a quantity of 1-30 weight % in said polymer material. 
   
   
       21 . The packaging container as claimed in  claim 5 , wherein said brittle point-lowering polymer is present in a quantity of 10-30 weight % in said polymer material. 
   
   
       22 . The packaging container as claimed in  claim 7 , wherein said outer, thermosealable layer displays a layer thickness of 2-10 μm. 
   
   
       23 . The packaging container as claimed in  claim 7 , wherein said outer, thermosealable layer is provided together with an inner, thermosealable layer by coextrusion. 
   
   
       24 . The packaging container as claimed in  claim 8 , wherein said outer, thermosealable layer displays a layer thickness of 25-40 μm. 
   
   
       25 . The packaging container as claimed in  claim 8 , wherein the outer, thermosealable layer includes at least two coextruded part layers which, at least in said selected part regions thereof, displays said brittle point. 
   
   
       26 . The packaging container as claimed in  claim 9 , wherein the barrier layer consists of aluminum. 
   
   
       27 . The packaging container as claimed in  claim 14 , wherein said seal displays an active sealing width of 0.5-3.5 mm.