PAPER CONTAINING PREGGREGATED FILLER AND PROCESS FOR PRODUCING THE SAME
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United States of America Patent
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Issued Date -
Jun 25, 2009
app pub date -
Jan 26, 2007
filing date -
Jan 26, 2006
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Abstract
Provide a paper offering good paper strength properties in terms of strength and stiffness, high smoothness and excellent printing quality by adjusting the ash content in paper to a range of 3 to 40 percent by solid weight and allowing the paper to contain a pre-coagulated filler having an average particle size of 10 to 80 μm as measured by the laser diffraction method, wherein such filler is obtained by processing a filler using a composite acrylamide copolymer comprising (A) an anionic polysaccharide and (B) a cationic and/or amphoteric acrylamide copolymer.
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