Tear-open strip for a packaging and method for producing a tear-open strip

Abstract

The invention relates to a tear-open strip (10) for a packaging (28), comprising a layer system (12) which has a paper substrate (14) and an adhesive layer (16) arranged on a first side of the paper substrate (14), the adhesive layer (16) having at least in some regions an uneven surface structure with relative elevations (20) and relative depressions (22). The invention also relates to a method for producing such a tear-open strip (10).

1 . A tear-open strip for a packaging, comprising a layer system, which comprises a paper substrate and an adhesive layer arranged on a first side of the paper substrate,
 wherein   the adhesive layer comprises an uneven surface structure with relative elevations and relative depressions at least in some regions.   
     
     
         2 . The tear-open strip according to  claim 1 ,
 wherein   the paper substrate is compostable and/or biodegradable and/or that the paper substrate has a grammage between 80 g/m 2  and 200 g/m 2 , in particular between 100 g/m 2  and 140 g/m 2 , and/or that the paper substrate has a stability of at least 75 N/15 mm, preferably of at least 110 N/15 mm in a main extension direction and/or a thickness between 100 μm and 250 μm, in particular between 150 μm and 200 μm.   
     
     
         3 . The tear-open strip according to  claim 1 ,
 wherein   the first and/or a second side of the paper substrate is embossed and/or bleached and/or dyed and/or printed.   
     
     
         4 . The tear-open strip according to  claim 1 ,
 wherein   the adhesive layer is applied to the first side all over or in sections and/or that the adhesive layer has an application weight between 15 g/m 2  and 60 g/m 2 , in particular between 20 g/m 2  and 30 g/m 2  and/or that the adhesive layer comprises a regular surface structure, in particular a dot structure and/or a wave structure and/or a line structure and/or a pyramid structure and/or a truncated pyramid structure and/or a hexagonal structure and/or a line structure with wells and/or a calotte structure.   
     
     
         5 . The tear-open strip according to  claim 4 ,
 wherein   the surface structure of the adhesive layer comprises a periodic structural element at least in some regions, wherein at least one extension vector of the periodicity of the structural element is preferably arranged obliquely to the main extension direction of the paper substrate.   
     
     
         6 . The tear-open strip according to  claim 1 ,
 wherein   a separating layer is arranged all over or in sections on the second side of the paper substrate, wherein an application weight of the separating layer is preferably between 0.1 g/m 2  and 2.0 g/m 2 , in particular between 0.2 g/m 2  and 1.0 g/m 2 .   
     
     
         7 . The tear-open strip according to  claim 1 ,
 wherein   a separating strip is arranged on a side of the adhesive layer facing away from the paper substrate.   
     
     
         8 . The tear-open strip according to  claim 1 ,
 wherein   it is rolled up on a reel with preferably traversing winding and/or is packaged as a flat reel.   
     
     
         9 . A method for producing a tear-open strip for a packaging, in which a layer system is produced in that an adhesive layer is applied to a first side of a paper substrate,
 wherein   the adhesive layer is produced with an uneven surface structure with relative elevations and relative depressions at least in some regions.   
     
     
         10 . The method according to  claim 9 ,
 wherein   the paper substrate is provided with an uneven surface structure before applying the adhesive layer and/or that the uneven surface structure is generated in the adhesive layer.   
     
     
         11 . The method according to  claim 9 ,
 wherein   the adhesive layer is applied to the paper substrate by means of an anilox roll, in particular a hachure roll.   
     
     
         12 . The method according to  claim 9 ,
 wherein   the paper substrate is provided with a printing layer and/or with a separating layer on the second side.   
     
     
         13 . The method according to  claim 12 ,
 wherein   a varnish layer is applied between the printing layer and the separating layer.   
     
     
         14 . The method according to  claim 9 ,
 wherein   the tear-open strip is cut into multiple strips, preferably by means of scissors cut, wherein the strips preferably have a width between 2 mm and 15 mm, in particular between 4 mm and 8 mm.   
     
     
         15 . A packaging comprising at least one tear-open strip according to  claim 1 . 
     
     
         16 . A packaging comprising at least one tear-open strip, which is produced by a method according to  claim 9 .