Tetra Laval Holdings & Finance S.a.

Kaj Johansson

Rolf Lasson

Christer Karlsson

Zoltan Pusztai

A method is disclosed for producing a printing ink decorated packaging material. The packaging material heat sealable outer coatings. One or both sides of the packaging material are subjected to corona discharge surface treatment to increase the surface tension. Printing is applied to the treated surface. The packaging material then passes the nip between heated rollers in order to reduce the surface energy of the outer plastic layers. Subsequently, a surface treatment of hydrogen peroxide is applied to the packaging material to sterilize the surface.

Method of producing a printing ink-decorated packaging material, in particular for aseptic packages

A method of producing a packaging laminate for aseptic packages of the type which is produced in that a web of the packaging laminate is, for the purpose of sterilization, led through a bath of hydrogen peroxide prior to the reforming of the web into aseptic packages. The packaging material is produced in that a web of paper which has, on the one side of the web, an applied outer coating of plastic, is, for the purpose of promoting adhesion, subjected to a surface treatment changing polarity, where after the treated outer plastic coating is provided with a decor of water-based printing ink which is applied in the desired pattern on the outside of the outer plastic coating. By selecting so-called flame treating as the surface treatment of changing polarity for the outer plastic coating, the above-mentioned sterilization can be carried out with considerably reduced hydrogen peroxide consumption, at the same time as good adhesion between the water-based printing ink decor and the outer plastic coating is ensured.

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Röstånga, Sweden

Kaj Johansson