HEAT-SEALING BARRIER PAPER
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United States of America Patent
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Issued Date -
Jul 27, 2017
app pub date -
Jul 29, 2015
filing date -
Jul 30, 2014
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Abstract
A paper including a fibrous substrate, a precoat layer including a binder and a mixture of platy filler(s) having a shape factor of at least 15 and of finer filler(s), the size of the particles of which is, for 80% by weight, less than 2 μm (measured according to the ISO 13317-3 SediGraph method) and at least one covering layer applied to the precoat layer, the paper having a water vapour permeability of at most 150 g/m2/24 h and preferably of less than 100 g/m2/24 h, measured according to the ASTM F1249 standard under so-called tropical conditions of 38° C. and 90% relative humidity.
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