Abstract: A multilayer material useful for packaging is disclosed, comprising a foam core comprising compressed foamed starch and a facing layer bonded to a surface of the foam core. A method of making the multilayer material is also disclosed, comprising forming a core of foamed starch, compressing the foamed starch core and bonding a facing layer to a surface of the foamed starch core. Apparatus for making the multilayer material is also disclosed, comprising a first station for supplying foamed starch pieces to a transport surface, a second station, downstream of the first station, for applying a bonding agent to the surfaces of the foamed starch pieces, a compressor for compressing the foamed starch pieces downstream of the second station; and a bonder for bonding a facing layer to at least one surface of the compressed foamed starch.

Abstract: An apparatus and a method for making a biodegradable material are disclosed. The apparatus comprises an extruder for forming a foamed starch rod and a heated die for modifying the rod. The rod is fed through the heated die by feeding rollers. A bonding agent application station is located downstream of the heated die and upstream of a packing unit. The method comprises forming a foamed starch rod by extrusion and passing the rod through a heated die. The rods may be formed into sheets or blocks by cutting, the application of bonding agent and adhering the cut rods together.