Abstract: The invention relates to a multilayer product for the production of packaging, the product comprising a carrier web (1), on one face of which there is disposed a tight multilayer coating (2) which includes a moisture-proof layer (b) and a gas-tight layer (a). The gas-tight layer is made up of a blend of an ethylene/vinyl alcohol copolymer and a polar ethylene polymer. The moisture-proof layer is polyolefin, preferably a blend of polyethylene and a polar ethylene polymer.

Abstract: The present invention relates to a cover (4) of a product package to be heat-sealed on the mouth of a product package and extractable therefrom when opening, and a method for manufacturing same. The cover is appropriate particularly for dosage packages of foodstuffs, such as milk, yogurt, juices and fruit syrups, desserts, etc., or for drug packages. The cover is made of paper (5) which is provided with polymer coating layers (6) on the undersurface, comprising a formally polymer binding agent layer and a heat-sealable polymer layer of an oxygen-tight, non-puncturable support layer, enabling extraction of the cover when opening the package. The essential feature in the invention lies therein that the support layer includes, as described above, a polymer component of high degree of crystallization and amorphous polymer component, wherewith the curling of the cover is prevented. Production of the cover (4) is accomplished with simultaneous extrusion of the polymer layers (6).

Abstract: The invention relates to a multi-layer product, in particular for producing containers, comprising a layer formed of a fiber-based packing material on one surface of which a gas-tight multi-layer plastic coating is arranged. To prevent the formation of microholes, the gas-tight multi-layer plastic coating is formed of superposed 1-4 g/m.sup.2 barrier plastic layer, 1-4 g/m.sup.2 binder layer, and surface layer of a heat-sealable polyolefin material having sufficient thickness for liquid-tight heat sealing, so that the barrier plastic layer is the closest of said layers to the fiber-based packing material layer.