Paper comprising PIPD floc and process for making the same
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United States of America Patent
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May 21, 2013
Grant Date -
Oct 8, 2009
app pub date -
Dec 19, 2006
filing date -
Dec 21, 2005
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention concerns a paper comprising polypyridobisimidazole floc having a length of from 1.0 to 15 mm, where the apparent density of the paper is from 0.1 to 0.4 g/cm3 and the tensile strength of the paper in N/cm is at least 0.000052X*Y, where X is the volume portion of polypyridobisimidazole in the total solids of the paper in % and Y is basis weight of the paper in g/m2.
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