Transport Closure, A Packaging Container Comprising The Transport Closure And A Method For Removing The Transport Closure From the Packaging Container

Abstract

The present disclosure relates to a transport closure ( 1 ) for use in a packaging container ( 10 ) for bulk solids. The transport closure includes a laminate of a first layer ( 2 ) and a second layer ( 3 ). The first layer ( 2 ) is delimited by a first layer peripheral edge ( 4 ) and the second layer ( 3 ) is delimited by a second layer peripheral edge ( 5 ). The second layer ( 3 ) comprises or consists of a weldable material and the first layer ( 2 ) has higher tear strength than the second layer ( 2 ). The first layer ( 3 ) is provided with a weakening line ( 6 ) defining a pull-tab ( 7 ) in the first layer ( 3 ) and having a first and a second base point ( 6 a, 6 b ). The base points ( 6 a, 6 b ) are arranged at a base end ( 7 b ) of the pull-tab ( 7 ), opposite to a gripping end ( 7 a ) of the pull-tab ( 7 ).

1 . A transport closure for use in a packaging container for bulk solids, said transport closure comprising or consisting of a laminate of a first layer and a second layer, said first layer being delimited by a first layer peripheral edge, said second layer being delimited by a second layer peripheral edge, said second layer comprising or consisting of a weldable material and said first layer having a higher tear strength than said second layer;
 wherein said first layer is provided with a weakening line defining a pull-tab in said first layer and having a first and a second base point, said base points being arranged at a base end of said pull-tab, opposite to a gripping end of said pull-tab, and at a distance d 1  and d 2  respectively, of from 1 to 30 mm from said first peripheral edge, wherein said weakening line forms one or both of a first and second weakening line leg extending from said one or both of the first and said second base point, respectively, and alongside with said first layer peripheral edge and that said second layer peripheral edge extends beyond said first layer peripheral edge around the perimeter of said transport closure forming a transport closure welding collar.   
     
     
         2 . The transport closure according to  claim 1 , wherein said first layer is a paperboard layer, a metal disc, a plastic disc or a laminate thereof. 
     
     
         3 . The transport closure according to  claim 1 , wherein said first layer has a thickness of from 5 to 2000 μm or from 20-500 μm. 
     
     
         4 . The transport closure according to  claim 1 , wherein said second layer comprises or consist of a plastic film or a metal foil, such as Aluminum foil. 
     
     
         5 . The transport closure according to  claim 1 , characterized in that said second layer has a thickness from 2 μm to 500 μm such as from 5 to 100 μm. 
     
     
         6 . The transport closure according to  claim 1 , wherein said first layer has a stiffness that is greater than said second layer. 
     
     
         7 . The transport closure according to  claim 1 , wherein said second layer peripheral edge extends beyond said first layer peripheral edge by a distance of from 1 to 25-, such as from 2 to 10 mm. 
     
     
         8 . The transport closure according to  claim 1 , wherein said first and second base points at said base end are arranged at a distance from each other of each least 3 mm, such as from 8 to 25 mm. 
     
     
         9 . The transport closure according to  claim 1 , wherein said first layer comprises a corner portion and that said pull-tab is arranged in said corner portion. 
     
     
         10 . The transport closure according to  claim 1 , wherein said distances d 1  and d 2  for said first and said second base point respectively, of said weakening line each are arranged no more than 10 mm from said first layer peripheral edge. 
     
     
         11 . The transport closure according to  claim 1 , wherein said pull-tab has a V-shape, O-shape, U-shape or a modified U-shape. 
     
     
         12 . The transport closure according to  claim 1 , wherein a first push-in area is defined in or by said first layer and that said push-in area is provided at said gripping end of said pull-tab. 
     
     
         13 . A packaging container for bulk solids being closed by the transport closure of  claim 1 , said container comprising a tubular container body with a top end with a top opening and a bottom end with a bottom opening comprising a container bottom, said container body having an inner surface facing towards an inner compartment in said packaging container and an outer surface facing away from said inner compartment, said packaging container being closed at said top opening by said transport closure said welding collar being welded to said inner surface of said container body. 
     
     
         14 . A method for removing the transport closure from said packaging container according to  claim 13 , the method comprising the steps of:
 a) gripping said pull-tab at said gripping end;   b) pulling said pull-tab along said weakening line and towards said base end and said first layer peripheral edge;   c) lifting said pull-tab slightly upwards until said second layer breaks and detaches from said inner surface of said container body; and   d) pulling said pull-tab upwards and backwards from said base end such that said second layer breaks and detaches from said inner surface at said welding seal and along said one or both of a first and second weakening line leg along the peripheral edges of said first layer until said transport closure is removed from said top opening and leaving less than 0.5 mm of said second layer extending into said top opening of said container body.   
     
     
         15 . The method for removing a transport closure from a packaging container according to  claim 14 , the method further comprising the step of:
 a1) applying pressure at a first push-in area defined in or by said first layer and provided at said gripping end of said pull-tab and thereby inclining said gripping end away from the transport closure to define a gap under said gripping end.