<p>A biodegradable packaging material and methods of manufacturing the same are provided in which a biodegradable substrate and a biodegradable polymer film are laminated together without the use of an adhesive interlayer. The film may be made of material that is soluble in water or which swells when exposed to moisture and is biodegradable. Off-line methods employing preformed substrates and films are disclosed as well as on-line methods in which the film is formed on a liner prior to the laminating process or is extruded onto the substrate.</p>
