Packaging laminate and a method of producing the same

Details Packaging laminate and a method of producing the same Packaging laminate and a method of producing the same

1995-05-22

1997-08-19

Thibodeau, Paul J.

Stock material or miscellaneous articles

Hollow or container type article

Paper containing

428 366, 428219, 428533, 4285375, 427395, 156299, 1563086, 536 20, 5361231, B32B 902, B32B 904, B32B 906, B32B 2900

Patent

active

056586221

ABSTRACT:
A packaging laminate comprising a rigid, but foldable paper or paperboard layer which has, at least on its one side, an outer film or coating of a water-insoluble polysaccharide compound which imparts to the packaging laminate tightness properties against liquid and water vapor and good sealing properties. Preferably, the other side of the core layer also has an outer film or coating of said polysaccharide compound. The polysaccharide compound in the two outer films or coatings contains a first water-soluble polysaccharide of polyanionic character and a second water-soluble polysaccharide of polycationic character, these being chemically or otherwise bonded to one another to form 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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patent: 5338406 (1994-08-01), Smith
patent: 5462866 (1995-10-01), Wang

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