Packaging laminate, method of producing a packaging container and the packaging container

Abstract

Method in connection with the production of a packaging container, including a) choosing or manufacturing a web shaped packaging laminate according to claim 1, b) converting said packaging laminate to a continuous tube by overlapping two longitudinal edges of the web shaped packaging laminate and heat sealing the overlapped edges to provide a longitudinal seal, c) filling the tube with contents, d) intermittently performing transversal seals by mechanically pressing together two transversal anvil jaws while the filled tube is arranged there between, e) while at the same time providing energy to the packaging laminate at an area of said transversal seal.

1 . Method in connection with the production of a packaging container, comprising 
 a) choosing or manufacturing a web shaped packaging laminate according to  claim 1 ,    b) converting said packaging laminate to a continuous tube by overlapping two longitudinal edges of the web shaped packaging laminate and heat sealing the overlapped edges to provide a longitudinal seal,    c) filling the tube with contents,    d) intermittently performing transversal seals by mechanically pressing together two transversal anvil jaws while the filled tube is arranged there between,    e) while at the same time providing energy to the packaging laminate at an area of said transversal seal.    
     
     
         2 . Method according to  claim 1 , wherein said energy is provided as ultrasonic energy.  
     
     
         3 . Method according to  claim 1 , wherein said mechanical pressing and said providing of energy is performed during a time interval of 100-250 milliseconds, preferably 140-220 milliseconds.  
     
     
         4 . Method according to  claim 1 , wherein said mechanical pressing is performed at 1-10 MPa.  
     
     
         5 . Method according to  claim 1 , wherein a continuous sealing strip is provided to cover an inside seam of the longitudinal seal, which sealing strip preferably is constituted by a polypropylene strip.