Stora Enso Oyj

Basf Se Corporation

Enso Oyj

Kimmo Nevalainen

Tapani Penttinen

Ville Ribu

Jurkka Kuusipalo

Jari Räsänen

Sami Kotkamo

Isto Heiskanen

Jalliina Järvinen

Tapio Koskinen

Kaj Backfolk

Markku Sainio

Erkki Laiho

Panu Tanninen

Mari Hiltunen

Ari Rosling

Mohammad Khajeheian

Sami Matthews

Henry Lindell

Ali Harlin

Esa Saukkonen

Gabriel Skupin

Jukka Kankkunen

Robert Loos

Outi Kylliäinen

Simo Siitonen

Antti Savolainen

Andreas Füβl

Martti Vähälä

Ella Lindström

Mikko Tuominen

Tommi Kauri

Esa Koreasalo

Tommi Lehikoinen

Minna Peltola

Tommi Sakari Kauri

Outi Kyllianen

Mikko Touminen

PYNNÖNEN Janne

The present invention is directed to a packaging material comprising a layer of microfibrillated cellulose (MFC) and an aluminum layer having a thickness of 0.1-20 μm, wherein the layer comprising MFC and/or the aluminum layer has been laminated or extrusion coated on at least one side with a thermoplastic polymer and wherein the amount of aluminum is sufficient to make the packaging material heat sealable by induction. The MFC layer contains at least 60% by weight of microfibrillated cellulose.

Heat sealable packaging material comprising microfibrillated cellulose and products made therefrom

The present invention relates to paper or paperboard comprising at least one coating layer formed by extrusion coating of a PET (polyethylene terephthalate) resin, characterized in that the PET resin comprises at least 50% by weight of a PET copolymer having an intrinsic viscosity of less than 0.7 dl/g, preferably less than 0.65 dl/g, as determined according to ISO 1628.

Polymer coated paper and paperboard

The invention relates to a method and an apparatus for deep-drawing a tray () from fiber-based sheet material (), such as polymer coated board. The apparatus comprises a female moulding tool (), which comprises a cavity () for forming the tray bottom outwardly, a male moulding tool (), which comprises a plunger plate () for forming the tray bottom inwardly, the plunger plate being movable with respect to the cavity for forming the tray, and clamps () with an interface for holding the sheet material and forming a tray rim flange. According to the invention by laterally distancing at least one of the moulding tools () from the sheet material leeway is provided for free forming of the tray side walls while wrinkling or tearing of the same is avoided. Spacer plates () may be positioned behind the plunger plate (), to adjust its position in relation to the cavity () of the female moulding tool (). The cavity may have a separate bottom plate () and spacer plates () there below, or screw means may be provided for adjusting the distance of the bottom of the cavity from the clamp interface and thereby varying the depth of the tray.

Method and apparatus for deep-drawing a tray from sheet material

A biodegradable packaging material, a method of manufacturing the same, as well as products made of the material wherein the manufacture comprises extrusion onto a fibrous substrate one or more polymer coating layers including at least one layer of a polymer blend consisting of (i) 20-95 wt-% of polylactide having a high melt index of more than 35 g/10 min (210&#xb0; C.; 2.16 kg), (ii) 5-80 wt-% of polybutylene succinate (PBS) or a biodegradable derivate thereof, and (iii) 0-5 wt-% of one or more polymeric additives. The components of the blend are melted and blended in connection with the extrusion step. The goal is to improve extrudability, increase machine speed in extrusion and maintaining good adhesiveness to the substrate and good heat-sealability of the coating. The products include disposable drinking cups and board trays, as well as sealed carton packages for solids and liquids.

Method for manufacturing biodegradable packaging material, biodegradable packaging material and a package or a container made thereof

The invention relates to a method and an apparatus for deep-drawing a tray () from a blank of sheet material (). The blank is provided with score lines, which determine the location of wrinkles formed in the process. The apparatus comprises a female moulding tool (), which comprises a cavity () for forming the tray bottom outwardly, a male moulding tool (), which comprises a plunger () for forming the tray bottom inwardly, the plunger being movable with respect to the cavity for forming the tray, and clamps () with an interface for holding the sheet material and forming a tray rim flange. According to the invention by laterally distancing at least one of the moulding tools () from the sheet material leeway is pro-vided for free forming so that wrinkling of the tray side walls is achieved in a controlled manner. Spacer plates () may be positioned behind the plunger (), to adjust its position in relation to the cavity () of the female moulding tool (). The cavity may have a separate bottom plate () and spacer plates () therebelow, or screw means may be provided for adjusting the distance of the bottom of the cavity from the clamp interface and thereby varying the depth of the tray.

An active moisture control material comprising a fiber based material and at least one active additive, wherein said active additive is adapted to control moisture transfer in the active moisture control material, and wherein said moisture control material is produced in a paper or board making process, wherein the active additive is incorporated into said active moisture control material.

Active moisture control material for packaging

A method for improving the heat sealability of a packaging material and a method for manufacturing a heat-sealed container or package are described. The material can be polymer-coated packaging paper or cardboard, or a polymeric packaging film. The material includes a polymer layer that contains polyester, particularly polylactide, the heat sealability of which is improved by ultraviolet radiation. Polylactide is useful as such or when blended, for example, with other biodegradable polyester. The containers and packages thus manufactured include disposable drinking cups and cardboard carton and box packages.

Method for improving the heat sealability of packaging material and method for manufacturing heat-sealed container or package

The invention covers a method of producing a heat-resistant polymer-coated oven board, the resulting oven board, a food tray and a food package, which comprise such board and withstand heating in a range or microwave oven. According to the invention the coated oven board () is made by adhering a premade heat-resisting film () comprising polyethylene terephthalate (PET) or its derivate, such as glycol-modified PET known as PETG, to a board base () by extrusion lamination, in which an adhesive layer () comprising polyamide (PA) is extruded between the heat-resisting film and the board base. To improve the strength and barrier properties, the film () may be an extruded multilayer film and/or the film may be stretch-orientated to bring about crystallization in PET.

Method of producing a heat-resistant polymer-coated oven board, an oven board obtainable by the method, a food tray and a food package

The invention relates to methods for lowering the melt viscosity and thereby improving heat-sealability of a polyester. The invention also relates to a method for manufacturing a heat-sealed container or package from fibrous-based, polyester-coated packaging material, and a method for heat-sealing polyester. The solution according to the invention is subjecting polyester to electron beam (EB) radiation. The lowered melt viscosity allows a lower heat-sealing temperature, and permits sealing of polyester to an uncoated fibrous surface. The preferred polyester for the invention is polylactide, as such or as blended with another polyester.

Methods for lowering melt viscosity and improving heat-sealability of polyester and for manufacturing a heat-sealed container or package

The invention relates to use of polylactide (PLA) as an extruded polymer coating on paper or board intended for the production of containers and packages, which are heated in a stove or microwave oven. According to the invention a polyfunctional cross-linking agent, such as trialkyl isocyanurate (TAIC), is blended with PLA, and the extruded coating layer is subjected to cross-linking electron beam (EB) radiation. PLA may be used as such or blended with another biodegradable polyester such as polybutylene succinate (PBS). EB radiation has been found to improve adhesion of the coating to the paper or board substrate, heat-scalability of the coating, and heat-resistance of the finished containers and packages.

Method of use of polylactide and manufacturing a heat-sealed paper or board container or package

The invention concerns a heat-sealable biodegradable packaging material, which comprises a fibrous substrate and one or more polymer coating layers extruded onto said substrate. According to the invention the packaging material includes at least one polymer coating layer containing polylactide and at least about 1 weight-% of terpene phenolic resin blended therewith. The invention further concerns a heat-sealed product package made from the packaging material, as well as uses of the resin as blends with polylactide in extrusion coating, for improving line speed and neck-in in extrusion, adhesivity of the coating to the fibrous substrate, and heat-sealability of the coating.

Heat-sealable biodegradable packaging material, a package made thereof, and use of a resin in extrusion coating

A biodegradable packaging material, a method of manufacturing the same, as well as products made of the material wherein a multilayer coating coextruded onto a fibrous substrate the multilayer coating comprising innermost and outermost layers of a blend comprising 20-95 wt-% of a higher melt index polylactide and 5-80 wt-% of another biodegradable polymer such as polybutylene succinate, and a middle layer containing a lower melt index polylactide alone. The goal is to increase machine speed in coextrusion while maintaining good adhesiveness to the substrate and good heat-sealability of the coating. The products include disposable drinking cups and board trays, as well as sealed carton packages for solids and liquids.

Method for manufacturing biodegradable packaging material, biodegradable packaging material and packages and containers made thereof

A biodegradable packaging material, a method of manufacturing the same, as well as products made of the material wherein the manufacture comprises extrusion onto a fibrous substrate one or mote polymer coating layers including at least one layer of a polymer blend consisting of (i) 20-95 wt-% of polylactide having a high melt index of more than 35 g/10 min (210&#xb0; C.; 2.16 kg), (ii) 5-80 wt-% of polybutylene succinate (PBS) or a biodegradable derivate thereof, and (iii) 0-5 wt-% of one or more polymeric additives. The components of the blend are melted and blended in connection with the extrusion step. The goal is to improve extrudability, increase machine speed in extrusion and maintaining good adhesiveness to the substrate and wood heat-sealability of the coating. The products include disposable drinking cups and board trays, as well as sealed carton packages for solids and liquids.

The invention concerns a heat-sealable biodegradable packaging material, which comprises a fibrous substrate () and one or more polymer coating layers () extruded onto said substrate. According to the invention the packaging material includes at least one polymer coating layer () containing at least 70 weight-% of polylactide (PLA) and at least 5 weight-% of polybutylene succinate (PBS) or its derivate blended therewith. Optionally an acryl copolymer such as ethylene butyl acrylate glycidyl methacrylate terpolymer (EBAGMA) may be included in the polymer blend. The invention further concerns a heat-sealed container, such as a disposable drinking cup, and a heat-sealed product package made from the packaging material, as well as uses of PBS or its derivates as blends with PLA in extrusion coating, for improving adhesivity of the coating to the fibrous substrate and reduced raw edge penetration to the packaging material, especially penetration of hot coffee held in the drinking cup.

Heat-sealable biodegradable packaging material, a package or a container made thereof, and use of a resin in extrusion coating

The invention relates to a polymer-coated packaging material, a method of manufacturing the same, and products, such as a disposable drinking cup, made from the material. The packaging material comprises a fibrous base () of paper or board and an extruded polymer layer () containing a blend of (i) 0 to 25 wt-% of a branched low-density polyethylene (LDPE) with a lower melt viscosity and (ii) 75 to 90 wt-% of a linear low-density polyethylene (LLDPE) with a higher melt viscosity. The packaging material of the invention comprises multilayer coatings, e.g. an adhesive innermost and a heat-sealable outermost layer () of said blend and a vapor barrier middle layer () of at most 90 wt-% of high density polyethylene (HDPE). The layers () are brought and adhered to the fibrous base () by coextrusion. To maximize renewability of the materials HDPE and LLDPE as used for the structure are of biologic origin.

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Kotka, Finland

Kimmo Nevalainen