Wet crepe throughdry process for making absorbent sheet and novel fibrous products
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United States of America Patent
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Apr 6, 2010
Grant Date -
May 17, 2007
app pub date -
Oct 10, 2006
filing date -
Jan 12, 2001
priority date (Note) -
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Abstract
An improved process for making sheet from a fibrous furnish includes: depositing the furnish on a foraminous support; compactively dewatering the furnish to form a nascent web; drying the web on a heated cylinder; creping the web therefrom and throughdrying the web to a finished product. The microstructure of the web is controlled so as to facilitate throughdrying. The product exhibits a characteristic throughdrying coefficient of from 4 to 10 when the airflow through the sheet is characterized by a Reynolds Number of less than about 1. The novel products of the invention are characterized by wet springback ratio, hydraulic diameter and an internal bond strength parameter.
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