Method of dewatering wet web using an integrally sealed air press
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United States of America Patent
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-
Jul 4, 2000
Issued Date -
N/A
app pub date -
Oct 31, 1997
filing date -
May 14, 1996
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A tissue sheet is made using a modified wet pressing process employing an integrally sealed air press. After initial formation and conventional vacuum dewatering, the wet web is conformed to the surface contour of a relatively coarse fabric to give the web a textured surface. By creating a pressure differential across the web of at least 30 inches of mercury and an air stream through the web of at least 500 SCFM/in.sup.2, the air press noncompressively dewaters the wet web to a consistency of about 30 to about 40 percent prior to a Yankee dryer. The web is dried to substantially preserve its three-dimensional, throughdried-like texture. The resulting web has an exceptionally high degree of bulk and absorbency not previously found in wet-pressed products.
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