Packaging material
AssigneeAlusuisse Technology & Management Ltd.
InventorsClaude A. Marbler, Rene Parmentier
Life of this patent
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Abstract
Packaging material for packaging moisture-sensitive products, for example soft cheese which in some cases undergoes a maturing process in the packaging. The packaging material contains at least two functional layers, a) a first functional layer (10, 11) which exhibits mechanical strength and can take up, store and release moisture, e.g. coated paper and b) a second functional layer (12, 13) which lies on the first functional layer and exhibits permeability to gases, the said permeability varying as a function of the moisture, e.g. a plastic laminate comprising an ionomer resin and a polyamide, the first functional layer and the second functional layer being permanently joined to each other.
Claims8
Packaging material for packaging moisture-sensitive products, containing at least two functional layers, comprising:
- (a) a first functional layer (10, 11) which exhibits mechanical strength and absorbs, retains and releases moisture, and which is selected from the group consisting of a paper (10) and a paper (10) with coating (11), and
- (b) a second functional layer (12, 13) which lies on the first functional layer (10, 11) and exhibits permeability to gases, the said permeability varying as a function of the moisture, and which is selected from the group consisting of (i) a polyamide (13), (ii) a polyamide (13) and an isomer-resin (12) and (iii) a polyamide (13) and an ethylene/vinylalcohol copolymer (12),
- and the first functional layer (10, 11) and the second functional layer (12, 13) being permanently joined to each other.
Dependencies are inferred from the claim text.