Two-ply blank (cold sealable)

Abstract

An element ( 1 ) punched out in a cover shape, for sealing of containers ( 7 ), includes a first ply ( 2 ) and a second inner ply ( 3 ) which is provided with a heat-sealable layer ( 5 ) on its side facing the container. The plies ( 2, 3 ) are connected to one another over their surface sides ( 2′, 3 ′.) facing one another by a cold-sealing layer ( 4 ), the adhesion between the plies ( 2, 3 ) being lower than that between the inner ply ( 3 ) and the container edge ( 8 ). On the inner ply ( 3 ) there can be scoring ( 10 ) which is exposed by peeling off the outer ply ( 2 ). If for example packaged material which is suited for heating in a microwave oven is stored in the container ( 7 ), the steam which forms during heating can escape through the scoring ( 10 ).

1 . Element ( 1 ) which is punched out in a cover shape for sealing of containers ( 19 ), consisting of a first outer ply ( 2 ) and a second inner ply ( 3 ) which is provided with a heat-sealable layer ( 5 ) on its side facing the container, characterized in that the plies ( 2 ,  3 ) are connected to one another over their surface sides ( 2 ′,  3 ′) facing one another by a cold-sealing layer ( 4 ), and that the adhesion between the plies is lower than that between the inner ply ( 3 ) and the container edge ( 8 ).  
     
     
         2 . Element which is punched out in a cover shape as claimed in  claim 1 , wherein the adhesion between the plies ( 2 ) and ( 3 ) is 0.2 to 4.5 N/15 mm measured according to DIN EN 28510-1.  
     
     
         3 . Element which is punched out in a cover shape as claimed in  claim 1 , wherein the adhesion between the inner ply ( 2 ) and the container edge ( 8 ) is greater than or equal (≧) 5 N/15 mm measured according to DIN EN 28510-1.  
     
     
         4 . Element which is punched out in a cover shape as claimed in  claim 1 , wherein the plies ( 2 ) and ( 3 ) are present as monomaterials and/or compound materials.  
     
     
         5 . Element which is punched out in a cover shape as claimed in  claim 1 , wherein the outer ply ( 2 ) is a metal foil, .preferably an aluminum foil.  
     
     
         6 . Element which is punched out in a cover shape as claimed in  claim 5 , wherein the outer ply ( 2 ) is provided with an imprint.  
     
     
         7 . Element which is punched out in a cover shape as claimed in  claim 6 , wherein the imprint has a rough surface.  
     
     
         8 . Element which is punched out in a cover shape as claimed in  claim 7 , wherein the surface-rough imprint is present in the form of geometrically arranged spacers.  
     
     
         9 . Element which is punched out in a cover shape as claimed in  claim 1 , wherein the inner ply ( 3 ) consists of plastics.  
     
     
         10 . Element which is punched out in a cover shape as claimed in  claim 9 , wherein the plastics are selected from the group polypropylene, polyethylene, polyester, polyacrylate, polyamide, or polystyrene.  
     
     
         11 . Element which is punched out in a cover shape as claimed in  claim 1 , wherein the inner ply ( 3 ) comprises at least one layer of paper.  
     
     
         12 . Element which is punched out in a cover shape as claimed in  claim 1 , wherein the inner ply ( 3 ) has scoring ( 10 ).  
     
     
         13 . Element which is punched out in a cover shape as claimed in  claim 1 , wherein the-inner ply ( 3 ) has perforations ( 11 ).  
     
     
         14 . Element which is punched out in a cover shape as claimed in  claim 13 , wherein the perforations ( 11 ) have the shape of a pour opening ( 12 ).  
     
     
         15 . Element which is punched out in a cover shape as claimed in  claim 1 , wherein the heat-sealable layer ( 5 ) has a rough surface.  
     
     
         16 . Element which is punched out in a cover shape as claimed in  claim 15 , wherein the surface roughness is formed by geometrically arranged spacers ( 6 ).  
     
     
         17 . Element which is punched out in a cover shape as claimed in  claim 1 , wherein the inner ply ( 3 ) is formed from a broken lattice ( 14 ) consisting of heat-sealable plastics.  
     
     
         18 . Element which is punched out in a cover shape as claimed in  claim 1 , wherein in at least one ply ( 2 ,  3 ) there is a combination-free area in the form of an opening aid, preferably a pull tab ( 9 ,  9 ′).