Tetra Pak International Ab

Jan A Rauser

Renato Cetrelli

Gunnar Knudsen

A method for forming a packing laminate and a packing laminate are disclosed. The disclosed method provides crack-resistant packing laminates which can be folded during the preparation of packing containers without the formation of excessive cracking due to tensile stresses. Tensile stresses within the folded laminated layers are reduced by either cutting portions of the laminate in an area corresponding to the fold line, or removing portions of the laminate corresponding to the fold line.

Packing container with a crack-resistant laminate

The invention relates to a method for the manufacture of packing material with good gas-tightness properties by coating a web or a sheet of paper with an aqueous solution containing polyvinyl alcohol and a thickener, e.g. carboxymethylcellulose, subsequently the water is boiled away and the coating layer formed is covered with a thin plastic film.

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Lomma, Sweden

Jan A Rauser