| 摘要 |
The invention relates to a method of producing packaging material in the form of a continuous laminate web ( 17 ) and being of the type which includes a core layer ( 2 ) of paper or cardboard whose one face displays a layer ( 7 ) which is disposed outside the core layer ( 2 ) and includes first an aluminium foil ( 4 ) and secondly a plastic coating ( 16 ) disposed outside the aluminium foil layer. Throughout its entire surface, the core layer ( 2 ) is covered with the above-mentioned layer ( 7 ), while along selected portions it extends out over the edges of the core layer ( 2 ). The above-mentioned layer ( 7 ) is formed in that the aluminium foil ( 4 ) and at least one thermoplastic material ( 6 ) are laminated to one another by being brought together between two rollers ( 10, 12 ) 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 ( 7 ) is brought together with the core layer ( 2 ) between two cooled rollers ( 13, 14 ) and co-laminated with the adhesive or binder layer of thermoplastic.
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