Method of pre-treating woodchips prior to mechanical pulping
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United States of America Patent
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May 17, 2011
Grant Date -
Nov 4, 2010
app pub date -
Jul 12, 2010
filing date -
Feb 21, 2006
priority date (Note) -
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Abstract
A method of making pulp adapted to be used in forming corrugating medium is disclosed. The method comprises cooking woodchips in a first liquor in the absence of an alkali addition. The method further comprises mechanically fiberizing the woodchips to form a pulp. The method further comprises separating hydrolyzate from the pulp. The method further comprises treating the pulp with a second liquor, the second liquor including at least one alkali. The method further comprises refining the pulp.
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