Tetra Laval Holdings & Finance S.a.

Rolf Lasson

Christer Karlsson

Kaj Johansson

Zoltan Pusztai

Nils Toft

Peter Öhman

Alberto Mameli

Gabor Benkö

Hichem Bouraoui

Joakim Balogh

Karl-H&aring;kan Sandell

Seppo Bergman

Theo Louman

Patrick Duvander

Rickard Norenstam

Peter Ohman

The present disclosure relates to a packaging material comprising a core material layer having an area radially extending from an edge of a hole in said core material layer, wherein said area has a linearly or non-linearly decreasing core material layer thickness towards the edge of the hole. The disclosure further relates to a method for production of such a packaging material, and uses thereof.

Packaging material, and process of manufacturing the same

A method for producing packaging material in web form comprising a carcass layer having through holes, openings or slits, a barrier layer on one side of the carcass layer, a plastic lining arranged outside the barrier layer, and a laminant thermoplast arranged between the carcass layer and barrier layer. The method involves bringing the barrier layer at the same time as the carcass layer to adhere to the plastic lining and/or to the laminant thermoplast film in a press nip. The press nip comprises an impression roller exhibiting a jacket surface faced with an inner facing layer of elastic material possessing a first hardness and a first thickness, and an outer facing layer of elastic material possessing a second hardness and a second thickness. The first hardness is greater than the second hardness and the first thickness is greater than the second thickness.

Method for producing a packaging material

The invention relates to a method of producing packaging material in the form of a continuous laminate web () and being of the type which includes a core layer () of paper or cardboard whose one face displays a layer () which is disposed outside the core layer () and includes first an aluminium foil () and secondly a plastic coating () disposed outside the aluminium foil layer. Throughout its entire surface, the core layer () is covered with the above-mentioned layer (), while along selected portions it extends out over the edges of the core layer (). The above-mentioned layer () is formed in that the aluminium foil () and at least one thermoplastic material () are laminated to one another by being brought together between two rollers () of which the one roller consists of a cooled roller and the other roller consists of a roller which is heated to a temperature exceeding the melting temperature of the thermoplastic. The above-mentioned formed layer () is brought together with the core layer () between two cooled rollers () and co-laminated with the adhesive or binder layer of thermoplastic.

Method of producing packaging material in the form of a continuous laminate web

Impression roller () for a laminating machine for producing a packaging material which comprises a carcass layer () consisting of paper or carton, which carcass layer exhibits through holes (), and which carcass layer exhibits, on one of its sides, a barrier layer (), a plastic lining () which is arranged outside the barrier layer, and a film of laminant thermoplast () which is arranged between the carcass layer () and the barrier layer (), with the said impression roller exhibiting a jacket surface which is faced with an inner facing layer () consisting of an elastic material, exhibiting a first hardness and a first thickness. According to the invention, an outer facing layer () consisting of an elastic material, exhibiting a second hardness and a second thickness, with the said first hardness being greater than the said second hardness and with the said first thickness being greater than the said second thickness, is arranged on the outside of the said inner facing layer (). The invention also relates to a method for producing packaging material and to the packaging material which has been produced using this method.

Device for producing a packaging material

The disclosure relates to a method of producing a well-integrated laminate material, for example a packaging laminate, in which method a first web () of plastic, and a second web () of plastic are brought together and permanently united to one another by the simultaneous application of heat and pressure, for the formation of the laminate material (). In order to improve the adhesion between the webs (and), these are subjected to a surface-activating treatment of non-chemical nature, preferably a corona treatment, prior to the uniting of the webs, whereby good adhesion and bonding between the webs is achieved without the employment of interjacent chemical adhesives. The method is preferably reduced into practice employing rollers (and) which are of different hardnesses, the relatively softer roller () being disposed to be movable in relation to the relatively harder roller () in such a manner that the nip between the rollers (and) through which both of the united webs are led may be adjusted at a suitable pressure, and that the nip obtains a certain width or extent in the linear direction of the webs as a result of the penetration of the relatively harder roller () into the surface of the compressing, relatively softer roller ().

Method of producing a laminate material

A method of producing a packaging laminate () in which a web is provided with through-going holes () which are covered on one side with a first outer layer () on the one side of the web and with a second outer layer () on the other side of the web in such a manner that the first and second outer layers (and) are permanently sealed to one another within the regions of the opening contour of the through-going holes. In order to ensure the permanent seal between the two outer layers (and), the web is subjected, after application of the first outer layer but prior to application of the second outer layer, to so-called flame-treating whereby accessible parts of the first outer layer within the regions of the through-going holes () are activated or polarized by means of one or more gas flames directed at the other side of the web.

Method of producing a packaging material

A multilayer structure intended for a packaging laminate with embossed appearance comprises a base layer and flexible, deformable layer disposed in planar relationship adjacent one another, with both layers adhesively bonded to one another along part surfaces of the total contact surface of each respective layer in a predetermined pattern. The flexible layer may be permanently deformed along the part surface or part surfaces that are in abutment against, but not adheringly bonded to the base layer, so that it substantially deviates from being in abutment against the base layer. Methods of producing a multilayer structure and a packaging laminate, as well as packaging containers produced from the packaging laminate are also disclosed.

Embossed packaging laminate and method of making laminate

The disclosure relates to a method of producing packages with opening arrangements and of the type which has a hole prepared in the package wall through which the package is intended to be emptied of its contents. A web of paper or paperboard is coated on its one side with liquid tight coating of plastic and, on its other side, with a metal foil which serves as oxygen gas barrier and which is bonded to the paper or paperboard layer by an adjacent adhesive layer. The coated web or packaging blank is thereafter transported further to a packing and filling machine where the web is provided with emptying-preparatory holes before being reformed into finished packages in a conventional manner. The emptying-preparatory holes are made only partly through the web in that the web is first incised or cut along closed lines through the outer plastic coating and the paper or paperboard web down to, but not through, the subjacent metal layer, and the parts of the web enclosed by the incision lines being thereafter removed from the web with the aid of a vacuum. The removal of the above-mentioned web parts is facilitated in that the packaging blank is selectively heated in order wholly or at least party to break the bond between the metal foil and the paper or paperboard layer within the region of these parts.

Method of producing a packaging container provided with an opening arrangement

The disclosure relates to a crease-lined packaging laminate ( ) which makes for more distinct and well-formed fold edges and thereby packaging containers with an attractive appearance and good configurational stability and handling stability, as well as a simple method of providing a packaging laminate with crease lines, which makes for more rational, and more economical changing of crease line patterns without the employment of expensive creasing tools. A packaging laminate ( ) comprising at least two layers ( ) which both contribute to the total rigidity of the packaging laminate is provided with fold indications in that the adhesion between the two layers is reduced or eliminated along the linear regions along which the packaging laminate is to be folded. Since both of the layers can be deformed more independently of one another along the linear adhesion reduced fold regions ( ), the total flexural resistance of the packaging laminate is less in these regions than in the rest of the packaging laminate. The adhesive bonding strength between the two layers ( ) may, for example, be reduced by applying an adhesion-counteracting agent on one or both of the layers within the linear crease line regions, or by applying an adhesion-promoting agent in the regions outside these crease line regions. In particular, the adhesion may be reduced by bringing the two layers to surface fusion with one another by the supply of heat to regions outside the crease lines. For example, the surfaces in the regions outside the crease lines may be darkened or blackened in order to absorb more heat than the relatively lighter crease line regions.

Crease-lined packaging laminate, a method of providing a packaging laminate with crease lines, and packaging containers produced from the laminate

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.

Method in the production of a printing ink-decorated packaging material

A laminated packaging material for fabrication into a container for a flowable food product is disclosed herein. The laminated packaging material has a fluted medium between a first layer and second layer. The fluted medium may have a flute density of 200 to 450 flutes per linear foot. The fluted medium may also have a flute height profile of 8 mils to 50 mils. The laminated packaging material may be fabricated into a gabletop carton or a parallelepiped container such as the TETRA BRIK.RTM. container. The laminated packaging material may have a barrier layer such as aluminum or another gas impermeable composition. The laminated packaging material provides substantial material savings due to the fluted medium.

Laminated packaging material having fluted medium

The disclosure relates to a method of producing packaging material comprising a core layer (9) which is provided with punched holes, apertures or slits (14), and which displays, along its one side, an unbroken layer (7) of a laminate consisting of aluminium foil and polyethylene. On production of the packaging material, a 'primary laminate' (7) of polyethylene and aluminium foil is first created in that the polyethylene is extruded as a film between the aluminium foil and the surface of a cooling roller while, in a second operation, which is carried out on the same cooling roller, a web (9) of paper or board provided with holes, apertures or slits (14) is united with the above-mentioned primary laminate (7) by the intermediary of an extruded polyethylene layer (16).

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Lund, Sweden

Rolf Lasson