Method of dewatering wet web using an integrally sealed air pres

Details Method of dewatering wet web using an integrally sealed air pres Method of dewatering wet web using an integrally sealed air pres

1997-10-31

2000-07-04

Nguyen, Dean T.

Paper making and fiber liberation

Processes and products

Non-uniform, irregular or configured web or sheet

162205, 162207, 162297, D21F 148, D21F 300

Patent

active

060833467

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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