Packaging material
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United States of America Patent
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Sep 28, 1999
Grant Date -
N/A
app pub date -
Jul 25, 1997
filing date -
Aug 13, 1996
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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.
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