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Abstract

There is described a multi-layer film. The film comprises a biodegradable layer and a metallised layer, wherein the biodegradable layer comprises a biopolymer selected from the group consisting of carbohydrates, polysaccharides, gums, proteins, colloids, polyorganic acids and mixtures thereof.

1 - 11 . (canceled) 
     
     
         12 . A multi-layer film, comprising:
 a biodegradable layer; and   a metallised layer,   wherein said biodegradable layer comprises a biopolymer selected from the group consisting of carbohydrates, polysaccharides, gums, proteins, colloids, polyorganic acids and mixtures thereof.   
     
     
         13 . The multi-layer film of  claim 12 , wherein said polyorganic acids include polylactic acid (PLA) and polygalactic acid (PGA). 
     
     
         14 . The multi-layer film of  claim 12 , wherein said biopolymer comprises PLA. 
     
     
         15 . The multi-layer film of  claim 12 , wherein said polysaccharides include starch, cellulose, glycogen, hemi-cellulose, chitin, fructan inulin, lignin, pectic substances and polysaccharide derivatives. 
     
     
         16 . The multi-layer film of  claim 15 , wherein said polysaccharide derivatives include amino derivatives, ester derivatives, ether derivatives and oxidised derivatives of polysaccharide. 
     
     
         17 . The multi-layer film of  claim 12 , wherein said biopolymer comprises cellulose. 
     
     
         18 . The multi-layer film of  claim 17 , wherein said cellulose is regenerated cellulose. 
     
     
         19 . The multi-layer film of  claim 12 , wherein said biopolymer comprises starch. 
     
     
         20 . The multi-layer film of  claim 12 , wherein said biopolymer layer further comprises a plasticiser. 
     
     
         21 . The multi-layer film of  claim 20 , wherein said plasticiser is present in an amount from about 10% to about 30% by weight of said biopolymer layer. 
     
     
         22 . The multi-layer film of  claim 20 , wherein said plasticiser is selected from the group consisting of glycols, urea, sorbitol, glycerol and mixtures thereof. 
     
     
         23 . The multi-layer film of  claim 12 , further comprising an adhesive layer. 
     
     
         24 . The multi-layer film of  claim 23 , wherein said adhesive layer comprises an adhesive dispersed in an aqueous medium. 
     
     
         25 . The multi-layer film of  claim 23 , further comprising a printable coating. 
     
     
         26 . The multi-layer film of  claim 25 , further comprising an ink layer printed on said printable coating. 
     
     
         27 . The multi-layer film of  claim 26 , wherein said ink layer is in contact with said adhesive layer. 
     
     
         28 . The multi-layer film of  claim 26 , wherein said ink layer and said adhesive layer are separated by said biodegradable layer. 
     
     
         29 . A multi-layer film, comprising:
 a PLA layer;   a metallised layer;   an adhesive layer; and.   a printable coating.   
     
     
         30 . The multi-layer film of  claim 29 , wherein said metallised layer and said adhesive layer are on the same side of said PLA layer. 
     
     
         31 . The multi-layer film of  claim 29 , further comprising an ink layer printed on said printable coating, wherein said adhesive layer is separated from said printable coating by said PLA layer.