Method of producing soft paper products
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United States of America Patent
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Dec 1, 1998
Grant Date -
N/A
app pub date -
Feb 14, 1997
filing date -
Feb 14, 1997
priority date (Note) -
Expired
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Abstract
A method of producing a soft paper product incudes, a) providing a pulp sheet at a moisture content of no greater than about 10%, the pulp of said sheet not having been previously subjected to dry milling and not being predominately anfractuous; b) treating the pulp sheet at moisture content of no greater than about 10% with liquid ammonia of a concentration of at least 90% for a period of time less than or equal to about 60 seconds effective to increase degree of softness in the sheet of pulp from that existing prior to the treating, the pulp in the treated sheet remaining not predominately anfractuous after said treating; c) forming the treated pulp sheet into a papermaking slurry; and d) feeding the papermaking slurry into the headbox of a paper machine and producing a tissue paper product therefrom which has greater softness than a tissue paper product made from the same pulp which has not been so treated with said ammonia.
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