| 摘要 |
<p>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 aluminum foil (4) and secondly a plastic coating (16) disposed outside the aluminum 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.</p> |
