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US 2026/0110140 A1Published application
Packaging item
AssigneeNotpla Limited
InventorsPierre-Yves Paslier, Rodrigo Garcia Gonzalez
Life of this patent
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Abstract
The invention relates to a greaseproof and waterproof packaging item comprising a composite material, the material comprising a fibre substrate and a cross-linked naturally derived polysaccharide.
Claims21
1-18. (canceled)
A process for making a greaseproof composite packaging material, the process comprising the steps of:
- (a) applying a water-based naturally derived polysaccharide solution to a fibre substrate;
- and
- (b) applying a water-based solution of polyvalent metal to the fibre substrate comprising the water-based naturally derived polysaccharide solution, wherein naturally derived polysaccharides in the water-based naturally derived polysaccharide solution cross link in the presence of the polyvalent metal solution forming a coating, layer or barrier on the fibre substrate to form the composite packaging material.
Dependencies are inferred from the claim text.