Manufacture of paper and paperboard containing wood free pulp
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United States of America Patent
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Sep 19, 2017
Issued Date -
Aug 18, 2016
app pub date -
Oct 3, 2014
filing date -
Oct 7, 2013
priority date (Note) -
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Abstract
The present invention relates to a process of manufacturing paper or paperboard which comprises providing (a) a mechanical pulp and (b) a wood free pulp, combining (a) the mechanical pulp and (b) the wood free pulp to form a mixed pulp comprising no more than 20% by total dry weight of fiber of the mechanical pulp, flowing the mixed pulp as a medium consistency stock and combining the medium consistency stock with dilution water to form a low consistency stock, draining the low consistency stock through a wire or mesh to form a sheet of paper which is dried, in which additional filler and a cationic polymer are added to the mechanical pulp.
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