Packaging material
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United States of America Patent
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Jan 11, 2000
Grant Date -
N/A
app pub date -
Mar 17, 1998
filing date -
Mar 17, 1997
priority date (Note) -
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Abstract
A laminate which contains the following layers: (I) a stretched microporous resin film base layer having an opacity of at least 80%; (Ia) a heat sealable adhesive resin layer on the back side of the base layer; (II) a gas barrier resin film layer on the surface side of the base layer; and (III) an inorganic oxide thin film layer on the surface side of the gas barrier resin film layer, wherein the laminate: (i) has a water vapor permeability of at most 5 g/m.sup.2 .multidot.24 hr, and (ii) has an oxygen permeability of at most 5 cc/m.sup.2 .multidot.24 hr.multidot.atm. The laminate is useful, for example, for packaging a variety of articles, e.g., edible products, in which taste and freshness are desirably preserved during transportation and storage thereof.
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