Sleeve-shaped outer part, combination packaging container equippedtherewith, and method for separating the combination packaging container

Abstract

The invention relates to a sleeve-shaped outer part (13) formed from a blank cut (13), wherein the blank cut (13) is wound to form a jacket and end portions (14, 15) are connected to each other in an overlapping region (16) by means of an adhesive layer (48). The adhesive layer (48) is configured such that the first end portion (14) and the second end portion (15) can be detached from one another again from the coupled state in the overlapping region (16).

1 . A combination packaging container ( 1 ), comprising:
 a cup-shaped inner container ( 2 ), wherein the inner container ( 2 ) has a container jacket ( 4 ) having an open end ( 5 ) and a closed end ( 3 ) with a bottom ( 7 )   an outer part ( 12 ), in particular the outer part ( 12 ) according to claim  4 , which encases the inner container ( 2 ),   
       wherein the outer part ( 12 ) is formed from a blank cut ( 13 ), said blank cut ( 13 ) having a first end portion ( 14 ) and a second end portion ( 15 ), wherein the blank cut ( 13 ) is wound into a jacket, thereby coupling the first end portion ( 14 ) and the second end portion ( 15 ) to one another in an overlapping region ( 16 ) by means of an adhesive layer ( 48 ) made of an adhesive, 
       wherein the outer part ( 12 ) further has a first end face ( 19 ) and a second end face ( 20 ) and the two end faces ( 19 ,  20 ) are spaced apart from one another, wherein the first end face ( 19 ) faces the bottom ( 3 ) and the second end face ( 20 ) the open end ( 5 ) of the inner container ( 2 ), 
       characterized in that 
       the adhesive layer ( 48 ) is configured such that the first end portion ( 14 ) and the second end portion ( 15 ) can be detached from one another in the overlapping region ( 16 ). 
     
     
         2 . The combination packaging container ( 1 ) according to  claim 1 , characterized in that the blank cut ( 13 ) has a multilayer, composite structure, wherein a support layer ( 49 ), in particular made of a cellulose material, is formed and wherein a printing layer ( 50 ) is arranged on the support layer ( 49 ) at least in sections and wherein a sealing layer ( 51 ) is formed at least in sections, wherein the printing layer ( 50 ) is arranged at least in sections between the support layer ( 49 ) and the sealing layer ( 51 ), wherein the adhesive layer ( 48 ) is arranged on the sealing layer ( 51 ). 
     
     
         3 . The combination packaging container ( 1 ) according to  claim 2 , characterized in that the printing layer ( 50 ) is recessed in the region of the adhesive layer ( 48 ) in the region of the first end portion ( 14 ), in particular that the sealing layer ( 51 ) is arranged directly on the support layer ( 49 ) in this region. 
     
     
         4 . The combination packaging container ( 1 ) according to one of the  claims 1 to 3 , characterized in that the adhesive is a hot-melt adhesive. 
     
     
         5 . The combination packaging container ( 1 ) according to one of the  claims 1 to 4 , characterized in that the adhesive layer ( 48 ) in the first end portion ( 14 ) abuts against an outer surface ( 42 ) and the adhesive layer ( 48 ) in the second end portion ( 15 ) abuts against an inner surface ( 43 ), wherein the first end portion ( 14 ) has a first tensile strength in the region of the outer surface ( 42 ) against which the adhesive layer ( 48 ) abuts, and the second end portion ( 15 ) has a second tensile strength in the region of the inner surface ( 43 ) against which the adhesive layer ( 48 ) abuts, and that the adhesive has a peel strength,
 wherein the peel strength of the adhesive is less than the first tensile strength of the outer surface ( 42 ) of the first end portion ( 14 ).   
     
     
         6 . The combination packaging container ( 1 ) according to one of the  claims 1 to 5 , characterized in that the adhesive has a peel strength and a shear strength, wherein the adhesive is selected such that the shear strength is greater than the peel strength. 
     
     
         7 . The combination packaging container ( 1 ) according to one of the  claims 1 to 6 , characterized in that the adhesive has a shear strength between 0.04 N/mm 2  and 2 N/mm 2 , in particular between 0.09 N/mm 2  and 1 N/mm 2 , preferably between 0.12 N/mm 2  and 0.5 N/mm 2  in adhesion to the sealing layer ( 51 ). 
     
     
         8 . The combination packaging container ( 1 ) according to one of the  claims 1 to 7 , characterized in that the adhesive has a peel strength between 0.0005 N/mm 2  and 1 N/mm 2 , in particular between 0.001 N/mm 2  and 0.01 N/mm 2 , preferably between 0.003 N/mm 2  and 0.007 N/mm 2  in adhesion to the sealing layer ( 51 ). 
     
     
         9 . The combination packaging container ( 1 ) according to one of the  claims 1 to 8 , characterized in that the adhesive has a tensile strength between 0.1 N/mm 2  and 60 N/mm 2 , in particular between 1 N/mm 2  and 30 N/mm 2 , preferably between 10 N/mm 2  and 20 N/mm 2 . 
     
     
         10 . The combination packaging container ( 1 ) according to one of the  claims 1 to 9 , characterized in that the adhesive has a peel strength, a shear strength and a tensile strength, wherein the adhesive is selected such that the tensile strength is greater than the shear strength and the tensile strength is greater than the peel strength. 
     
     
         11 . The combination packaging container ( 1 ) according to one of the  claims 1 to 10 , characterized in that a first longitudinal edge ( 17 ) is formed on the first end portion ( 17 ) having a first longitudinal edge length ( 52 ), wherein the adhesive layer ( 48 ) has an elongated extension and is arranged to run parallel to the longitudinal edge ( 17 ). 
     
     
         12 . The combination packaging container ( 1 ) according to  claim 11 , characterized in that a length ( 53 ) of the adhesive layer ( 48 ) is between 100% and 80%, in particular between 99% and 85%, preferably between 97% and 93% of the first longitudinal edge length ( 52 ). 
     
     
         13 . The combination packaging container ( 1 ) according to  claim 11 or 12 , characterized in that a width ( 54 ), of the adhesive layer ( 48 ) is between 1 mm and 10 mm, in particular between 1.5 mm and 7 mm, preferably between 2.5 mm and 3.5 mm. 
     
     
         14 . The combination packaging container ( 1 ) according to one of the  claims 11 to 13 , characterized in that the adhesive layer ( 48 ) is arranged at a distance ( 55 ) of between 1 mm and 10 mm, in particular between 1.5 mm and 7 mm, preferably 2.5 mm and 3.5 mm from the second longitudinal edge ( 18 ). 
     
     
         15 . The combination packaging container ( 1 ) according to one of the  claims 1 to 14 , characterized in that the inner container ( 2 ) has a shoulder ( 7 ) projecting radially outwardly in the region of the closed end ( 11 ), wherein the shoulder ( 11 ) serves as an axial stop for the first end face ( 19 ) of the outer part ( 12 ). 
     
     
         16 . The combination packaging container ( 1 ) according to  claim 15 , characterized in that the shoulder ( 11 ) is configured to taper conically at least in sections from the open end ( 5 ) to the closed end ( 7 ). 
     
     
         17 . The combination packaging container ( 1 ) according to one of the  claims 1 to 16 , characterized in that the container jacket ( 4 ) of the inner container ( 2 ) is configured to taper conically at least in sections from the open end ( 5 ) to the closed end ( 7 ). 
     
     
         18 . A method for producing a combination packaging container ( 1 ), in particular the combination packaging container ( 1 ) according to one of the  claims 1 to 17 , comprising the method steps:
 providing a cup-shaped inner container ( 2 ), wherein the inner container ( 2 ) has a container jacket ( 4 ) having an open end ( 5 ) and a closed end ( 3 ) with a bottom ( 7 )   forming an outer part ( 12 ) to encase the inner container ( 2 )   
       wherein the outer part ( 12 ) is formed from a blank cut ( 13 ), said blank cut ( 13 ) having a first end portion ( 14 ) and a second end portion ( 15 ), wherein the blank cut ( 13 ) is wound into a jacket and the first end portion ( 14 ) and the second end portion ( 15 ) are coupled to one another in an overlapping region ( 16 ) by means of an adhesive layer ( 48 ) made of an adhesive wherein the outer part ( 12 ) further has a first end face ( 19 ) and a second end face ( 20 ) and the two end faces ( 19 ,  20 ) are spaced apart from one another
 axially sliding the outer part ( 12 ) onto the inner container ( 2 ), wherein the first end face ( 19 ) is made to face the bottom ( 3 ) and the second end face ( 20 ) the open end ( 5 ) of the inner container ( 2 ) or directly forming the outer part ( 12 ) by wrapping the inner container ( 2 ). 
 
       characterized in that 
       the adhesive layer ( 48 ) is configured such that the first end portion ( 14 ) and the second end portion ( 15 ) can be detached from one another in the overlapping region ( 16 ). 
     
     
         19 . The method according to  claim 18 , characterized in that a hot-melt adhesive is used for applying the adhesive layer ( 48 ) to the blank cut ( 13 ), the former being applied to an outer surface ( 42 ) of the blank cut ( 13 ) in the region of the first end portion ( 14 ) before forming the outer part ( 13 ). 
     
     
         20 . The method according to  claim 19 , characterized in that the hot-melt adhesive is originally present in granular form and is melted by heating, in particular to a temperature between 130° C. and 160° C., and is pressed through a nozzle for application to the outer surface ( 42 ) of the blank cut ( 13 ). 
     
     
         21 . A method for separating a combination packaging container ( 1 ), in particular the combination packaging container ( 1 ) according to one of the  claims 1 to 16 , with a cup-shaped inner container ( 2 ), wherein the inner container ( 2 ) has a container jacket ( 4 ) having an open end ( 5 ) and an closed end ( 3 ) with a bottom ( 7 ), and an outer part ( 12 ) encasing the inner container ( 2 ), wherein the outer part ( 12 ) is formed from a blank cut ( 13 ), said blank cut ( 13 ) having a first end portion ( 14 ) and a second end portion ( 15 ), wherein the blank cut ( 13 ) is wound into a jacket and the first end portion ( 14 ) and the second end portion ( 15 ) are coupled to one another in an overlapping region ( 16 ) by means of an adhesive layer ( 48 ) made of an adhesive, wherein the outer part ( 12 ) further has a first end face ( 19 ) and a second end face ( 20 ) and the two end faces ( 19 ,  20 ) are spaced apart from one another, wherein the first end face ( 19 ) faces the bottom ( 3 ) and the second end face ( 20 ) the open end ( 5 ) of the inner container ( 2 ).
 characterized by the method step that   to separate the outer part ( 12 ) from the inner container ( 2 ), the first end portion ( 14 ) of the outer part ( 12 ) and the second end portion ( 15 ) of the outer part ( 12 ) are detached from one another in the overlapping region ( 16 ) on the adhesive layer ( 48 ).   
     
     
         22 . The method according to  claim 21 , characterized in that, when detaching the first end portion ( 14  of the outer part ( 12 ) and the second end portion ( 15 ) of the outer part ( 12 ), the adhesive layer ( 48 ) is detached from the first end portion ( 14 ) without damaging the first end portion ( 14 ) with the adhesive layer ( 48 ) remaining on the second end portion ( 15 ), or the adhesive layer ( 48 ) is detached from the second end portion ( 15 ) without damaging the second end portion ( 15 ) with the adhesive layer ( 48 ) remaining on the first end portion ( 14 ). 
     
     
         23 . The method according to  claim 21 or 22 , characterized in that to separate the outer part ( 12 ) from the inner container ( 2 ), the first end portion ( 14 ) of the outer part ( 12 ) and the second end portion ( 15 ) of the outer part ( 12 ) are detached from one another in the overlapping region ( 16 ) on the adhesive layer ( 48 ) in that a compressive force  1  is applied in the direction of the combination packaging container ( 1 ) and, in doing so, the outer part ( 12 ) and the container jacket ( 4 ) of the combination packaging container ( 1 ) are spatially deformed, wherein the spatial deformation of the outer part ( 12 ) and the container jacket ( 4 ) in the region of the adhesive layer ( 48 ) introduces a separating force, which results in the detachment of the adhesive layer ( 48 ) from the first end portion ( 14 ) or to the detachment of the adhesive layer ( 48 ) from the second end portion ( 15 ). 
     
     
         24 . The method according to  claim 23 , characterized in that the spatial deformation of the outer part ( 12 ) includes an axial deformation that is greater than 1.5 cm from an undeformed state of use and/or a radial deformation that is greater than 2 cm from an undeformed state of use.