Abstract: A device (10) and a method for transverse sealing of a tube (12) of thermoplastic coated packaging material are provided. The tube is formed by sealing of an overlapping joint (14) between two mutually opposing edge sections (26, 28) of a sheet of packaging material. The device comprises first and second opposing jaws (16, 18) having first and second main sealing surfaces (20, 22), respectively. The tube is arranged to be flat-laid and squeezed between these main sealing surfaces to heat the thermoplastic there between and obtain a transverse seal along a main sealing line (24) of the tube. The device is characterized in that it is arranged to penetrate the outer edge section (28) of the overlapping joint along the main sealing line prior to sealing to allow the first main sealing surface (20) to contact the inner edge section (26) of the overlapping joint.

Abstract: A device (10) and a method for transverse sealing of a tube (12) of thermoplastic coated packaging material are provided. The tube is formed by sealing of an overlapping joint (14) between two mutually opposing edge sections (26, 28) of a sheet of packaging material. The device comprises first and second opposing jaws (16, 18) having first and second main sealing surfaces (20, 22), respectively. The tube is arranged to be flat-laid and squeezed between these main sealing surfaces to heat the thermoplastic there between and obtain a transverse seal along a main sealing line (24) of the tube. The device is characterized in that it is arranged to penetrate the outer edge section (28) of the overlapping joint along the main sealing line prior to sealing to allow the first main sealing surface (20) to contact the inner edge section (26) of the overlapping joint.

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.

Abstract: Packaging laminate (10) for a packaging container, which packaging laminate comprises a structural base layer (4), and an inside layer (6). According to the invention, said inside layer (6) comprises a sealing ply (2) of a heat sealable thermoplastic material, which sealing ply is arranged to be the outermost layer on one side of the laminate (10), intended to be arranged on the inside of said container, said heat sealable thermoplastic material exhibiting a melt enthalply lower than 115 J/g. The invention also relates to a method of producing packaging containers from the packaging laminate, and to a packaging container produced from the packaging laminate.