| 摘要 |
<p>The disclosure relates to a laminated packaging material (10) for liquid-tight packages which, after use, may readily be biodegraded or composted. The packaging material (10) has a core layer (11) of biodegradable material and outer, moisture and liquid-tight layers (12, 14, respectively) similarly of biodegradable material which are applied to both sides of the core layer, the layers being bonded to the core layer (11) by means of interjacent layers (13, 15, respectively) of biodegradable binder. The packaging material (10) is produced in that a web of biodegradable material is covered or coated on both sides with an aqueous dispersion of a biodegradable material acting as binder in a quantity of between 0.5 and 5.0 g/m<2>, whereafter the applied binder layers are dried. The dried, coated web is united either with prefabricated web-shaped films of biodegradable material or with biodegradable material which is extruded onto both sides of the web, for the formation of the outer, moisture and liquid-tight layers (12 and 15) of the packaging material (10).</p> |
