Low hygroexpansivity paper sheet
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United States of America Patent
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Jul 16, 2013
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N/A
app pub date -
Sep 12, 2012
filing date -
Sep 12, 2012
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Abstract
A paper sheet is providing having a basis weight of 50 to 80 g/m2, and having a top surface and a bottom surface, said paper sheet comprising 10%-80% by weight of hardwood kraft pulp; and 10%-70% by weight of sulfite pulp; wherein the paper sheet has an MD/CD TSI ratio of 1.25 to 2.15, and a fiber hygroexpansion stress transfer parameter (ω) of less than 0.1.
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