A packaging laminate and a method of producing the same

Details A packaging laminate and a method of producing the same A packaging laminate and a method of producing the same

D - Textiles, Paper

21

H

D21H 19/34 (2006.01) B32B 29/00 (2006.01) B65D 5/56 (2006.01) C09D 105/08 (2006.01) D21H 19/84 (2006.01)

Patent

CA 2122322

ABSTRACT OF THE DISCLOSURE A packaging laminate (10) including a rigid, but foldable paper or paperboard layer (11) which has, at least on its one side, an outer film or coating (12) of a water-insoluble polysaccharide compound which imparts to the packaging laminate (10) tightness properties against liquid and water vapour and good sealing properties. Preferably, the other side of the core layer (11) also has an outer film or coating (13) of said polysaccharide compound. The polysaccharide compound in the two outer films or coatings (12 and 13) includes, on the one hand, a first water-soluble polysaccharide of polyanionic character and, on the other hand, a second water-soluble polysaccharide of polycationic character, these being chemically or otherwise bonded to one another for forming the water-insoluble polysaccharide compound. One preferred such polysaccharide compound may, for example, consist of a chemical compound or a chemical complex of chitosan and agar.

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