Abstract: Polymer-coated, heat-sealable liquid packaging board that resists solvents (e.g. strong alcoholic drinks), method of manufacturing board, and drinking cup made of board. Resistance to solvents is achieved by lowering raw edge penetration into the board. The fiber base of the board contains at least 1.3 kg of hydrophobic size containing alkyl ketene dimer and at least 1.0 kg of wet-strength size per 1 ton of dry matter. Fiber base density is 630-800 kg/m3. The amount of heat-sealable polymer in the top layer is higher than the Bristow wheel roughness volume of the uncoated fiber base and/or at least 14 g/m2. When manufacturing the board, the alkyl ketene dimer size and a wet-strength size are added into the stock. The pH of the tail water is adjusted so as to be alkaline (about 7 or more).

Abstract: The present invention relates to a container made from fiber based board wherein the container comprises a sleeve and a bottom, said bottom comprises polymer coated board, at least one side of said sleeve is uncoated and the sleeve is formed by sealing two edges of the sleeve together along a side seam. The invention further relates to a method for producing said container.

Abstract: The present invention relates to a container made from fiber based board wherein the container comprises a sleeve and a bottom, said bottom comprises polymer coated board, at least one side of said sleeve is uncoated and the sleeve is formed by sealing two edges of the sleeve together along a side seam. The invention further relates to a method for producing said container.

Abstract: The invention relates to a polymer-coated, heat-sealable liquid packaging board that resists solvents, such as strong alcoholic drinks, to a method of manufacturing the same and to a drinking cup made of the same. In the invention, resistance to solvents is achieved by lowering the raw edge penetration to the board. For this, the fibre base of the board contains at least 1.3 kg of hydrophobic size containing alkyl ketene dimer (AKD) per 1 tonne of dry matter, and at least 1.0 kg of wet-strength size per 1 tonne of dry matter, the density of the fibre base is 630-800 kg/m3 and the amount of heat-sealable polymer in the top layer is higher than the Bristow wheel roughness volume of the uncoated fibre base and/or at least 14 g/m2. When manufacturing the board, the AKD size, the length of the carbon chain of which is preferably at least C18, and the wet-strength size, such as polyamidoamine epichlorohydrin resin (PAAE), are added into the stock on the wire of the paper or board machine or before the same.

Abstract: The invention relates to a package intended for thermal treatment comprising a fiber-based packaging material treated with a hydrophobic size and comprising one or more layers for reduced water penetration outside and/or inside the fiber substrate. The package of the invention is characterized by the fiber substrate being treated with a combination of a wet-strength size, a hydrophobic size and an aluminum and/or calcium compound for increased heat resistance of the packaging material, and in that the ratio of hydrophobic size to the aluminium and/or calcium compound is 1:1-1:10.

Abstract: The invention relates to a package intended for thermal treatment comprising a fibre-based packaging material treated with a hydrophobic size and comprising one or more layers for reduced water penetration outside and/or inside the fibre substrate. The package of the invention is characterised by the fibre substrate being treated with a combination of a wet-strength size, a hydrophobic size and an aluminium and/or calcium compound for increased heat resistance of the packaging material, and in that the ratio of hydrophobic size to the aluminium and/or calcium compound is 1:1-1:10.