Method of Producing Paper and Cardboard
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United States of America Patent
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Issued Date -
Dec 4, 2008
app pub date -
Dec 5, 2006
filing date -
Dec 5, 2005
priority date (Note) -
Abandoned
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Abstract
A method of producing paper or cardboard using a bleached cellulosic pulp, which contains hemicelluloses. According to invention a significant portion, at least 5 wt-%, preferably about 8 to 30 wt-%, of the hemicelluloses are removed from the pulp. The hemicelluloses taken from one bleached pulp can then be transferred to another resulting in two pulps with varying properties, one pulp with properties related to low hemicelluloses content in the fiber wall and the other with properties related to high hemicelluloses content on the fiber surface.
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